CN117151471B - Mine water treatment detection method and system - Google Patents
Mine water treatment detection method and system Download PDFInfo
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- CN117151471B CN117151471B CN202311220231.9A CN202311220231A CN117151471B CN 117151471 B CN117151471 B CN 117151471B CN 202311220231 A CN202311220231 A CN 202311220231A CN 117151471 B CN117151471 B CN 117151471B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 179
- 238000001514 detection method Methods 0.000 title claims abstract description 19
- 239000002689 soil Substances 0.000 claims abstract description 209
- 238000003973 irrigation Methods 0.000 claims abstract description 92
- 230000002262 irrigation Effects 0.000 claims abstract description 90
- 238000000034 method Methods 0.000 claims abstract description 47
- 230000008569 process Effects 0.000 claims abstract description 13
- 230000000694 effects Effects 0.000 claims abstract description 12
- 238000013441 quality evaluation Methods 0.000 claims description 30
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 22
- 238000004364 calculation method Methods 0.000 claims description 20
- 238000011156 evaluation Methods 0.000 claims description 16
- 238000012417 linear regression Methods 0.000 claims description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- 239000000460 chlorine Substances 0.000 claims description 14
- 230000035945 sensitivity Effects 0.000 claims description 14
- 239000000126 substance Substances 0.000 claims description 13
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 12
- 229910052801 chlorine Inorganic materials 0.000 claims description 12
- 229910052742 iron Inorganic materials 0.000 claims description 11
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 8
- 238000005904 alkaline hydrolysis reaction Methods 0.000 claims description 8
- 239000011591 potassium Substances 0.000 claims description 8
- 229910052700 potassium Inorganic materials 0.000 claims description 8
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 239000011574 phosphorus Substances 0.000 claims description 7
- 229910052698 phosphorus Inorganic materials 0.000 claims description 7
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 6
- 238000005341 cation exchange Methods 0.000 claims description 6
- 229910052748 manganese Inorganic materials 0.000 claims description 6
- 239000011572 manganese Substances 0.000 claims description 6
- 230000002411 adverse Effects 0.000 claims description 5
- 238000011548 physical evaluation Methods 0.000 claims description 4
- 238000012216 screening Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 17
- 230000009471 action Effects 0.000 description 5
- 238000001914 filtration Methods 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 4
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 239000005416 organic matter Substances 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 238000010206 sensitivity analysis Methods 0.000 description 3
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 239000003621 irrigation water Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- USFZMSVCRYTOJT-UHFFFAOYSA-N Ammonium acetate Chemical compound N.CC(O)=O USFZMSVCRYTOJT-UHFFFAOYSA-N 0.000 description 1
- 239000005695 Ammonium acetate Substances 0.000 description 1
- 229910021581 Cobalt(III) chloride Inorganic materials 0.000 description 1
- 229940043376 ammonium acetate Drugs 0.000 description 1
- 235000019257 ammonium acetate Nutrition 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004737 colorimetric analysis Methods 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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- 230000036541 health Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009616 inductively coupled plasma Methods 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 229910001961 silver nitrate Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 238000002798 spectrophotometry method Methods 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- IEKWPPTXWFKANS-UHFFFAOYSA-K trichlorocobalt Chemical compound Cl[Co](Cl)Cl IEKWPPTXWFKANS-UHFFFAOYSA-K 0.000 description 1
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Abstract
The application provides a mine water treatment detection method and system for irrigation, comprising the following steps: determining risk factors after mine water treatment, and calculating a first removal rate of the risk factors; calculating the soil quality comprehensive index according to the positive and negative effects of the physicochemical indexes of the soil on the soil; calculating a risk factor threshold of the soil according to the soil quality comprehensive index; determining a second removal rate of mine water according to a risk factor threshold of the soil; comparing the first removal rate with the second removal rate, and judging whether the irrigation of mine water damages the soil safety. When the first removal rate is smaller than the second removal rate, judging that irrigation mine water can harm soil safety, and carrying out process treatment again until the first removal rate is not smaller than the second removal rate; when the first removal rate is greater than or equal to the second removal rate, the method judges that irrigation mine water cannot harm soil safety, and further can better achieve the beneficial effect that the mine water irrigation cannot affect soil quality.
Description
Technical Field
The invention relates to the technical field of mine water resource utilization, in particular to a mine water treatment detection method and system.
Background
The water resource is about 300 hundred million tons per year in the aspect of farmland irrigation, so that the safe utilization of mine water resources for soil irrigation is particularly important.
However, mine water discharge can have an influence on soil quality, and the influence is more remarkable, the determination of risk factors and threshold values of the mine water for irrigation is lack of research, and the corresponding detection method is also not perfect enough, so that the soil quality is endangered by the mine water irrigation.
Thus, it is highly desirable for those skilled in the art to develop a specific method for detecting mine water treatment to better achieve the goal of ensuring that the irrigation of mine water does not affect the quality of soil.
Disclosure of Invention
In view of the above, the embodiment of the invention provides a mine water treatment detection method and a system, which are used for solving the technical problem that mine water irrigation causes harm to soil quality due to imperfect detection method in the prior art.
To achieve the above object, an embodiment of the present invention provides a mine water treatment detection method for irrigation, the method including:
determining risk factors after mine water treatment, and calculating a first removal rate of the risk factors;
calculating the soil quality comprehensive index according to the weight and membership degree of the physicochemical index of the soil to the soil;
calculating a risk factor threshold of the soil according to the soil quality comprehensive index;
determining a second removal rate of mine water according to a risk factor threshold of the soil;
comparing the first removal rate with the second removal rate, and judging whether the irrigation of mine water damages the soil safety.
Further, the determining the risk factor after the mine water treatment and calculating the first removal rate of the risk factor include:
(1) Collecting the processed mine water sample, measuring each water quality index parameter value of the mine water sample, and comparing the water quality index parameter values with a water quality emission standard to determine risk factors in the mine water;
(2) And measuring the original concentration of the risk factor before mine water treatment and the discharge concentration after mine water treatment according to the determined risk factor, and calculating the first removal rate according to the original concentration and the discharge concentration.
Further, the calculating the soil quality comprehensive index according to the weight and membership degree of the physicochemical index of the soil, includes:
firstly, analyzing the sensitivity of the physical and chemical indexes of the soil, specifically judging the sensitivity of the evaluation index by adopting a coefficient of variation method, and screening the sensitivity index as the soil quality evaluation index;
calculating the weight value and membership degree of each soil quality evaluation index;
and calculating the soil quality comprehensive index according to the weight value and the membership degree of each soil quality evaluation index.
Further, the calculating the risk factor threshold of the soil according to the soil quality comprehensive index comprises the following steps:
calculating soil quality comprehensive index values before and after irrigation;
if the soil quality comprehensive index value after irrigation is smaller than the soil quality comprehensive index value before irrigation, judging that the mine water irrigation has adverse effect on the soil quality, and taking the soil quality comprehensive index value before irrigation as the lowest soil quality comprehensive index value after irrigation;
and calculating to obtain a risk factor threshold of the soil according to the soil quality comprehensive index value before irrigation.
Further, the determining the second removal rate of the mine water according to the risk factor threshold of the soil comprises:
establishing a linear regression model according to the content of risk factors in soil and the concentration of the risk factors in mine water;
substituting the risk factor threshold value of the soil into a linear regression equation of the established linear regression model, and calculating to obtain the highest discharge concentration of the risk factor in the mine water;
and calculating the second removal rate according to the highest discharge concentration of the risk factors in the mine water.
Further, the first removal rate and the second removal rate are compared to judge whether the mine water irrigation endangers the soil safety, and the specific judgment mode is as follows:
when the first removal rate is smaller than the second removal rate, judging that irrigation mine water can harm soil safety, and carrying out process treatment again until the first removal rate is not smaller than the second removal rate;
when the first removal rate is greater than or equal to the second removal rate, judging that irrigation mine water does not harm soil safety.
Further, the soil physical and chemical indexes comprise physical evaluation indexes and chemical evaluation indexes;
the physical evaluation indexes comprise water content, pH and conductivity;
the chemical evaluation index comprises cation exchange capacity, organic matters, alkaline hydrolysis nitrogen, available phosphorus, quick-acting potassium, iron, manganese and chlorine.
Further, the first removal rate is calculated by: first removal rate= (original concentration-discharge concentration)/original concentration×100%.
Further, the second removal rate is calculated by: second removal rate= (original concentration-highest discharge concentration)/original concentration×100%.
Another embodiment of the present invention provides a mine water treatment detection system, the system comprising:
the first calculation module is used for calculating a first removal rate of risk factors after treatment of mine water;
the second calculation module is used for calculating the soil quality comprehensive index according to the positive and negative effects of the physicochemical indexes of the soil on the soil;
the third calculation module is used for calculating a risk factor threshold value of the soil according to the soil quality comprehensive index;
the fourth calculation module is used for determining a second removal rate of the mine water according to the risk factor threshold value of the soil;
the detection judging module is used for comparing the first removal rate with the second removal rate and judging whether the mine water irrigation endangers the soil safety.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a mine water treatment detection method for irrigation, which comprises the following steps: determining risk factors after mine water treatment, and calculating a first removal rate of the risk factors; calculating the soil quality comprehensive index according to the positive and negative effects of the physicochemical indexes of the soil on the soil; calculating a risk factor threshold of the soil according to the soil quality comprehensive index; determining a second removal rate of mine water according to a risk factor threshold of the soil; comparing the first removal rate with the second removal rate, and judging whether the irrigation of mine water damages the soil safety. When the first removal rate is smaller than the second removal rate, judging that irrigation mine water can harm soil safety, and carrying out process treatment again until the first removal rate is not smaller than the second removal rate; when the first removal rate is greater than or equal to the second removal rate, the method judges that irrigation mine water cannot harm soil safety, and further can better achieve the beneficial effect that the mine water irrigation cannot influence soil quality safety.
The method can be used as a basis for whether the mine water is used for irrigation after treatment, and provides scientific basis for utilization of mine water resources and final effect of mine water treatment.
Drawings
The following drawings are included to provide a further understanding of the present application and are intended to provide a further explanation and illustration of the invention, and are not intended to limit the scope of the invention. In the drawings:
FIG. 1 is a flow chart of a method of detecting mine water treatment for irrigation in an embodiment of the present application;
FIG. 2 is a graph of the chlorine content in soil versus the concentration of chloride ions in mine water in accordance with another embodiment of the present application;
FIG. 3 is a schematic diagram of a mine water treatment detection system for irrigation in an embodiment of the present application.
Detailed Description
The following drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate several embodiments of the invention and together with the description serve to explain the principles of the invention.
The invention provides a mine water treatment detection method for irrigation, which comprises the following steps: determining risk factors after mine water treatment, and calculating a first removal rate of the risk factors; calculating the soil quality comprehensive index according to the positive and negative effects of the physicochemical indexes of the soil on the soil; calculating a risk factor threshold of the soil according to the soil quality comprehensive index; determining a second removal rate of mine water according to a risk factor threshold of the soil; comparing the first removal rate with the second removal rate, and judging whether the irrigation of mine water damages the soil safety. When the first removal rate is smaller than the second removal rate, judging that irrigation mine water can harm soil safety, and carrying out process treatment again until the first removal rate is not smaller than the second removal rate; when the first removal rate is greater than or equal to the second removal rate, the method judges that irrigation mine water cannot harm soil safety, and further can better achieve the beneficial effect that the mine water irrigation cannot influence soil quality safety.
Specifically, referring to fig. 1, the embodiment provides a method for detecting mine water treatment for irrigation, which includes the following steps:
step S1, determining risk factors after mine water treatment, and calculating a first removal rate of the risk factors;
in practical application, the process flow of mine water treatment comprises three stages of pretreatment, advanced treatment and post-treatment; in the present application, the risk factors after the treatment of the mine water can be respectively three-stage risk factors, and the risk factors are conventional ions such as Na which are possibly harmful to irrigation soil + 、K + 、Mg 2+ 、Ca 2+ 、HCO 3 - 、CO 3 2- 、SO 4 2- The method comprises the steps of carrying out a first treatment on the surface of the And/or characteristic ions, such as Cl-; and/or heavy metals, such as Fe, mn, cu, as, se.
Specifically, the method for calculating the first removal rate of the risk factor comprises the following steps:
(1) Collecting the processed mine water sample, measuring each water quality index parameter value of the mine water sample, and comparing the water quality index parameter values with a water quality emission standard to determine risk factors in the mine water;
(2) And measuring the original concentration of the risk factor before mine water treatment and the discharge concentration after mine water treatment according to the determined risk factor, and calculating the first removal rate according to the original concentration and the discharge concentration.
As an embodiment, in order to fully understand whether the water quality of mine water resources in a mining area can be used for irrigation, two groups of raw mine water L and mine water Z after a precipitation filtration pretreatment system for performing quartz stone filtration after adding medicaments PAC and PAM for precipitation are respectively collected. The mine water samples were tested and compared to water quality emission standards and the results are shown in table 1.
TABLE 1 mine Water quality and Water quality Standard comparison Table (mg/L)
By comparing the water quality findings of two kinds of mine water (raw mine water L and treated mine water Z), the TDS, conductivity EC, pH and other ion contents of the mine water Z after the precipitation and filtration pretreatment system for quartz stone filtration after adding medicaments PAC and PAM are precipitated are not much different from those of the raw mine water L, but the turbidity and the iron content are greatly reduced, which indicates that the mine water Z can be well removed by the precipitation and filtration process. Comparing the water quality requirements of Chinese farm irrigation water quality standard, reclaimed water quality standard and urban sewage recycling green land irrigation water quality, the method discovers that the Cl-and TDS values of mine water are out of standard, and meanwhile, chloride ions are the main components of TDS, and excessive chloride has influence on soil and planted crops, so that health risks exist after eating, and therefore, chloride ions are defined as mine water risk factors.
Although the concentration of heavy metals iron and manganese in mine water does not exceed the water quality standard limit value, the limit value is close, so that the iron and manganese are used as research objects in the aspect of heavy metals in mine water.
According to the table and analysis comparison, determining that the risk factor in the mine water is chloride ion Cl-, and determining the chloride ion Cl based on the table - The first removal rate is calculated according to actual measurement values of water quality index parameters of mine water before and after treatment, and the specific calculation mode is as follows: first removal rate= (original concentration-discharge concentration)/original concentration×100%, whereby it is possible to obtain chloride ion first removal rate= (original concentration-discharge concentration)/original concentration×100% = (331.5-289.8)/331.5×100% = 12.6%.
S2, calculating a soil quality comprehensive index according to positive and negative effects of physical and chemical indexes of the soil on the soil;
in the application, soil physical and chemical indexes are selected as evaluation items, such as physical indexes: water content, pH, conductivity, etc., chemical index: cation exchange capacity, organic matter, alkaline hydrolysis nitrogen, available phosphorus, quick-acting potassium, iron, manganese, chlorine and the like; and selecting a corresponding membership function according to positive and negative effects of each index on soil to determine membership of each soil quality evaluation index, calculating a weight value of each evaluation index, and calculating a soil quality comprehensive index according to the weight value and membership of each soil quality evaluation index.
Sensitivity of soil physical and chemical indexes is analyzed firstly, and the sensitivity analysis of the soil indexes is shown in a table 2:
TABLE 2 sensitivity analysis of soil index
11 soil quality evaluation indexes are selected as total data set evaluation factors in the table 2, wherein the total data set evaluation factors comprise soil moisture content, conductivity, pH, cation exchange capacity, organic matters, alkaline hydrolysis nitrogen, available phosphorus, quick-acting potassium, iron, manganese and chlorine. Wherein, the water content of the soil is measured by a weight method; the conductivity (EC value) of the soil is measured by an electrode method; the pH value is measured by adopting a potential method; cation Exchange Capacity (CEC) is measured by adopting a hexaammine cobalt trichloride leaching-spectrophotometry method; the organic matter content is measured by adopting a potassium dichromate-external heating method; the content of quick-acting potassium is measured by adopting an ammonium acetate leaching-flame photometry method; the content of the effective phosphorus is determined by adopting a sodium bicarbonate leaching-molybdenum-antimony-scandium colorimetric method; the alkaline hydrolysis nitrogen is measured by an alkaline hydrolysis diffusion method; the iron and manganese contents are measured by adopting an inductively coupled plasma emission spectrometry; the chlorine content was determined by silver nitrate titration.
The sensitivity of the soil quality evaluation index is analyzed, and the larger the variation coefficient is, the more sensitive the soil quality evaluation index is in response, and the more suitable for being used as an evaluation index for monitoring the soil quality change. The sensitivity analysis of 11 indexes selected in the study is shown in table 2, and the general insensitive indexes are not recommended to be used as soil quality evaluation indexes (medium sensitivity (coefficient of variation is more than or equal to 40% and less than or equal to 100%), low sensitivity (coefficient of variation is more than or equal to 10% and less than 40%), and insensitivity (coefficient of variation is less than 10%), so that 9 soil quality evaluation indexes of water content, conductivity, cation exchange capacity, organic matters, alkaline hydrolysis nitrogen, available phosphorus, quick-acting potassium, iron and chlorine are taken as evaluation factors.
And calculating the weight value and the membership degree of each soil quality evaluation index, and calculating the soil quality comprehensive index according to the weight value and the membership degree of each soil quality evaluation index.
The membership function is adopted to carry out standardized treatment on each soil quality evaluation index, and is divided into two functions of 'rising type' and 'falling type', wherein the soil conductivity range in the table 2 is 78.2-135.6 mu s/cm and is lower than a lower critical value (EC is less than or equal to 200 mu s/cm), so that the membership function of the conductivity belongs to 'rising type', the membership functions of iron and chlorine in the soil belong to 'falling type', and the other indexes are both 'rising type', and the specific membership function has the following calculation formula:
wherein: x represents a certain quality evaluation index value of the actually measured soil, f (x) is a membership degree, a and b are respectively the upper limit and the lower limit of the threshold value of each soil quality evaluation index, and thus the membership degree of each soil quality evaluation index before and after the irrigation of the mine water is calculated, and the membership degree is shown in the following table 4:
TABLE 4 membership of soil before and after mine Water irrigation
| Category(s) | Before irrigation | After the treated mine water Z irrigates |
| Water content | 0.30 | 0.59 |
| Conductivity of | 0.26 | 0.55 |
| CEC | 0.22 | 0.22 |
| Organic matter | 0.28 | 0.34 |
| Alkaline hydrolysis of nitrogen | 0.81 | 0.6 |
| Available phosphorus | 0.69 | 0.81 |
| Quick-acting potassium | 0.48 | 0.24 |
| Iron (Fe) | 0.75 | 0.31 |
| Chlorine | 0.85 | 0.49 |
According to the ratio that the weight of a certain soil quality evaluation index is equal to the sum of the evaluation factor variance of the index and the evaluation factor variance of all indexes, the calculation formula of the weight is as follows:
wherein: w (W) i A weight value representing an ith soil quality evaluation index; d% xi ) Evaluation factor variances representing the respective soil quality evaluation indexes.
The soil quality comprehensive index SQI is calculated by the weight of each soil quality evaluation index and the membership value thereof, and the concrete calculation formula is as follows:
wherein: SQI is soil quality comprehensive index; w (W) i The weight of the ith soil quality evaluation index is f (x), the membership degree of the ith soil quality evaluation index is f (x), and n is the number of evaluation factors.
Based on the above formula and the parameter actual measurement values of each soil quality evaluation index in the table, the soil quality comprehensive index before irrigation is 0.50, and the soil quality comprehensive index after irrigation of the treated mine water is 0.47, which indicates that the soil quality after irrigation of the treated mine water is reduced to some extent, and the mine water irrigation can threaten the soil safety.
S3, calculating a risk factor threshold of the soil according to the soil quality comprehensive index before irrigation;
specifically, calculating soil quality comprehensive index values before and after irrigation, if the soil quality comprehensive index value after irrigation is smaller than the soil quality comprehensive index value before irrigation, judging that mine water irrigation has adverse effect on the soil quality, taking the soil quality comprehensive index value before irrigation as the lowest soil quality comprehensive index value after irrigation, and calculating to obtain a risk factor threshold value of the soil according to the soil quality comprehensive index value before irrigation, wherein a risk factor of the risk factor threshold value corresponds to the risk factor determined in the step S1.
That is, in order to prevent the quality of the soil after the irrigation of the treated mine water from being adversely affected, the soil quality comprehensive index is at least the soil quality comprehensive index before the irrigation, and the soil quality comprehensive index SQI before the irrigation is substituted into the calculation formula of the comprehensive index method after the irrigation to obtain the risk factor threshold value in the soil.
Step S4, calculating a risk factor threshold value in mine water according to a linear regression model according to the risk factor threshold value of the soil, and calculating a second removal rate of the mine water according to the calculated risk factor threshold value in the mine water, wherein the second removal rate is the minimum removal rate required in the mine water treatment process;
by measuring the risk factor content in the soil under the irrigation of different gradient solutions, a linear equation y=kx+b (R) of the concentration gradient of the risk factor in mine water and the content of the risk factor in the soil is obtained 2 Not less than 0.6), wherein y represents risk factor content in soil, x represents risk factor concentration in mine water, k is slope coefficient, b is intercept constant, R 2 The method is used for evaluating the fitting degree of the linear regression model, and therefore the risk factor threshold value in the mine water is calculated according to the risk factor threshold value in the soil obtained through calculation.
As an example, according to the risk factor determined in step S1 as chloride ion Cl-, the soil quality integrated index before irrigation is 0.50, and in order to prevent the soil quality after irrigation of the treated mine water from being negatively affected, the soil quality integrated index is at least the soil quality integrated index value sqi=0.5 before irrigation, and sqi=0.5 is substituted into the soil quality integrated index formula to calculate the chloride ion threshold= 48.72 (mg/kg) in the soil.
Establishing a linear regression model of the concentration gradient of the risk factors in mine water and the content of the risk factors in the soil by measuring the content of the risk factors in the soil under irrigation of different gradient solutions; substituting the risk factor threshold value of the soil into a linear regression equation of the established linear regression model, and calculating to obtain the highest discharge concentration of the risk factor in the mine water; and calculating the second removal rate according to the highest discharge concentration of the risk factors in the mine water.
As shown in FIG. 2, taking chloride ion Cl < - > as an example, the linear relation diagram of the chlorine content in soil and the chloride ion concentration in mine water,it can be seen that the linear regression equation of the concentration of chloride ions in mine water and the chlorine content in soil is: y=0.0128 x+46.48r 2 =0.76 > 0.6 (where y represents the chlorine content in the soil, x represents the chloride ion concentration in mine water);
thus, when the chloride ion content in the soil was 48.72mg/kg, the chloride ion concentration in the mine water was calculated to be 175.0mg/L.
The highest discharge concentration of chloride ions in mine water is 175.0mg/L, so that the quality of soil after irrigation of the treated mine water is not negatively affected.
Thus, the second removal rate is calculated by: the second removal rate= (original concentration-highest discharge concentration)/original concentration×100% = (331.5-175.0)/331.5×100% = 47.2%, i.e. the minimum removal rate of the mine water treatment process is 47.2%, so that the quality of the soil after the treated mine water irrigation is not negatively affected.
S5, comparing the first removal rate with the second removal rate, and judging whether the irrigation of mine water damages the soil safety;
the first removal rate of chloride ions by the mine water treatment process calculated in the step S1 is 12.6%, which is far less than 47.2%, so that the soil safety can be harmed after irrigation mine water discharge can be detected and judged, and the mine water treatment process needs to be carried out again until the first removal rate is not less than the second removal rate.
Of course, when the first removal rate is greater than or equal to the second removal rate, the detection judges that irrigation mine water does not harm soil safety.
As shown in fig. 3, another embodiment of the present application provides a mine water treatment detection system, the system comprising:
the first calculation module is used for calculating a first removal rate of risk factors after treatment of mine water;
the second calculation module is used for calculating the soil quality comprehensive index according to the positive and negative effects of the physicochemical indexes of the soil on the soil;
the third calculation module is used for calculating a risk factor threshold value of the soil according to the soil quality comprehensive index;
the fourth calculation module is used for determining a second removal rate of the mine water according to the risk factor threshold value of the soil;
the detection judging module is used for comparing the first removal rate with the second removal rate and judging whether the mine water irrigation endangers the soil safety.
It should be noted that, for simplicity of description, the foregoing method embodiments are all expressed as a series of action combinations, but it should be understood by those skilled in the art that the present application is not limited by the order of actions described, as some steps may be performed in other order or simultaneously in accordance with the present application. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all alternative embodiments, and that the acts and modules referred to are not necessarily required in the present application.
Finally, it is pointed out that in the present document relational terms such as first and second, and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or terminal device comprising the element.
In addition, the technical solutions of the embodiments of the present invention may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of the claimed invention.
While the foregoing description illustrates and describes the preferred embodiments of the present application, it is to be understood that this application is not limited to the forms disclosed herein, but is not to be construed as an exclusive use of other embodiments, and is capable of many other combinations, modifications and environments, and is capable of changes within the scope of the inventive subject matter, either as a result of the foregoing teachings or as a result of knowledge or technology in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the present invention are intended to be within the scope of the appended claims.
Claims (8)
1. A method for detecting mine water treatment for irrigation, the method comprising:
step S1, determining risk factors after mine water treatment, and calculating a first removal rate of the risk factors;
s2, analyzing the sensitivity of the soil physical and chemical indexes, screening the sensitivity indexes as soil quality evaluation indexes, calculating the weight value and membership degree of each soil quality evaluation index, and calculating the soil quality comprehensive index according to the weight value and membership degree of each soil quality evaluation index;
s3, calculating a risk factor threshold of the soil according to the soil quality comprehensive index; specifically, calculating soil quality comprehensive index values before and after irrigation, if the soil quality comprehensive index value after irrigation is smaller than the soil quality comprehensive index value before irrigation, judging that mine water irrigation has adverse effect on the soil quality, substituting the soil quality comprehensive index value before irrigation as the lowest soil quality comprehensive index value after irrigation into an after-irrigation comprehensive index method calculation formula, and reversely calculating to obtain a risk factor threshold value of the soil;
s4, determining a second removal rate of mine water according to a risk factor threshold value of the soil, specifically, establishing a linear regression model of a risk factor concentration gradient in the mine water and the risk factor content in the soil by measuring the risk factor content in the soil under irrigation of different gradient solutions; substituting a risk factor threshold value of the soil into a linear regression equation of the established linear regression model, calculating to obtain the highest discharge concentration of the risk factor in the mine water, and calculating the second removal rate according to the highest discharge concentration of the risk factor in the mine water;
and S5, comparing the first removal rate with the second removal rate, and judging whether the mine water irrigation endangers the soil safety.
2. The method for detecting mine water treatment according to claim 1, wherein the step S1 of determining a risk factor after the mine water treatment and calculating a first removal rate of the risk factor comprises:
(1) Collecting the processed mine water sample, measuring each water quality index parameter value of the mine water sample, and comparing the water quality index parameter values with a water quality emission standard to determine risk factors in the mine water;
(2) And measuring the original concentration of the risk factor before mine water treatment and the discharge concentration after mine water treatment according to the determined risk factor, and calculating the first removal rate according to the original concentration and the discharge concentration.
3. The method for detecting mine water treatment according to claim 1, wherein in the step S2, the sensitivity of the physical and chemical indexes of the soil is analyzed, specifically, the sensitivity of the evaluation index is judged by using a coefficient of variation method, and the sensitivity index is selected as the soil quality evaluation index.
4. The method for detecting mine water treatment according to claim 1, wherein in the step S5, the magnitudes of the first removal rate and the second removal rate are compared to determine whether the mine water irrigation is harmful to the soil safety, and the specific determination method is as follows:
when the first removal rate is smaller than the second removal rate, judging that irrigation mine water can harm soil safety, and carrying out process treatment again until the first removal rate is not smaller than the second removal rate;
when the first removal rate is greater than or equal to the second removal rate, judging that irrigation mine water does not harm soil safety.
5. The mine water treatment detection method of claim 1, wherein the soil physicochemical indexes comprise physical evaluation indexes and chemical evaluation indexes;
the physical evaluation indexes comprise water content, pH and conductivity;
the chemical evaluation index comprises cation exchange capacity, organic matters, alkaline hydrolysis nitrogen, available phosphorus, quick-acting potassium, iron, manganese and chlorine.
6. The method for detecting mine water treatment of claim 1, wherein the first removal rate is calculated by: first removal rate= (original concentration-discharge concentration)/original concentration×100%.
7. The method for detecting mine water treatment of claim 1, wherein the second removal rate is calculated by: second removal rate= (original concentration-highest discharge concentration)/original concentration×100%.
8. A mine water treatment detection system, the system comprising:
the first calculation module is used for calculating a first removal rate of risk factors after treatment of mine water;
the second calculation module is used for analyzing the sensitivity of the soil physical and chemical indexes, screening the sensitivity indexes as soil quality evaluation indexes, calculating the weight value and membership of each soil quality evaluation index, and calculating the soil quality comprehensive index according to the weight value and membership of each soil quality evaluation index;
the third calculation module is used for calculating a risk factor threshold value of the soil according to the soil quality comprehensive index; specifically, calculating soil quality comprehensive index values before and after irrigation, if the soil quality comprehensive index value after irrigation is smaller than the soil quality comprehensive index value before irrigation, judging that mine water irrigation has adverse effect on the soil quality, substituting the soil quality comprehensive index value before irrigation as the lowest soil quality comprehensive index value after irrigation into an after-irrigation comprehensive index method calculation formula, and reversely calculating to obtain a risk factor threshold value of the soil;
the fourth calculation module is used for determining a second removal rate of mine water according to a risk factor threshold value of the soil, and specifically, establishing a linear regression model according to the content of the risk factors in the soil and the concentration of the risk factors in the mine water; establishing a linear regression model of the concentration gradient of the risk factors in mine water and the content of the risk factors in the soil by measuring the content of the risk factors in the soil under irrigation of different gradient solutions; substituting a risk factor threshold value of the soil into a linear regression equation of the established linear regression model, calculating to obtain the highest discharge concentration of the risk factor in the mine water, and calculating the second removal rate according to the highest discharge concentration of the risk factor in the mine water;
the detection judging module is used for comparing the first removal rate with the second removal rate and judging whether the mine water irrigation endangers the soil safety.
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