CN104192976A - Method for processing total nitrogen/total phosphorus/heavy metal in river through zero-valent iron - Google Patents
Method for processing total nitrogen/total phosphorus/heavy metal in river through zero-valent iron Download PDFInfo
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Abstract
The invention discloses a method for processing total nitrogen/total phosphorus/heavy metal in river through zero-valent iron. According to the method disclosed by the invention, zero-valent iron (reduced iron powder and cast-iron scrap) of industrial production is acidified for the first time, and is directly added to a river water sample for an oscillating reaction or a column experiment so as to achieve a purpose of purifying river sewage. Except that a research on processing of chromium in the river through zero-valent iron regulates initial pH of original water to 4.0 so as to achieve an optimum removal effect, other experiments do not regulate initial pH of the original water, therefore the method has a good application prospect in actual river water treatment. Results show that the zero-valent iron removes TN and TP mainly through absorption, and removes heavy metal mainly through a reduction reaction; a Cu (II) removal rate is higher than 68% and Cr (VI) removal rate is close to 100%. A result of the column experiment shows that a removal capacity of the zero-valent iron on Cu (II) is higher than 0.07567g/g. The method is strong in practicability, good in processing effect, simple in process, low in cost and safe to operate.
Description
Technical field
The present invention relates to river water burst treatment process, be specifically related to a kind of Zero-valent Iron and process the method that total nitrogen/total phosphorus/heavy metal is gushed in river.
Background technology
China has the river of more than 50000 drainage area more than 100 square kilometres, and these rivers that extend in all direction are the important component parts in city, have flood fighting, purifies, irrigate, and communications and transportation, the multinomial effect such as view, closely bound up with resident's life.The urbanization in past more than 30 year and industrialized development, most rivers are subject to the pollution that degree is different, and river blackout is smelly, and river bed alluvial, has caused great impact to the people's livelihood.In state's control section of China's ten large watersheds in 2012, overall bad V class water quality section ratio is 10.2%, and main contamination index is chemical oxygen demand (COD), five-day BOD and permanganate index.
Take Guangdong Province as example, gush (in Delta of Pearl River in main river, in July, 2013 50 of Guangzhous, river is gushed and is referred to the branch of a river, Hu Cha, branch, the tributary etc. of secondary channel, stream or the river in river, it refers to smaller river or streams, secondary channel etc., and one section of river course of lock etc. is established at neither head nor tail or two) in, have 39 below standard.During gush in 31 (33 sections) rivers of inner city, except two rivers are up to standard, all the other all exceed standard, article 27, gush for " bad V class " in river, it is still serious that Guang Zhouhe gushes ammonia nitrogen, the total phosphorus situation that exceeds standard, and wherein Nan Ganghe (Huangpu section) ammonia nitrogen times of ultra standard is 15.8, exceeds standard the most serious, white sea, Baiyun District total phosphorus exceeds standard the most serious, and multiple is 10.55.Article 50, transnormal items is gushed taking organic contamination indexs such as ammonia nitrogen, total phosphorus, chemical oxygen demand (COD), five-day BOD and dissolved oxygens as main in river, and presents obvious life and widespread pollution from the overuse of fertilizers and pesticides in rural area feature.Shi Jinghe, hunt that moral is gushed, Dong Haoyong, Liu Xi He Xin city gush, white mud river, etc. the water on ground have the smelly phenomenon of blackout, floating on water is gushed in many rivers domestic refuse.In addition, the Inner source of water body is polluted and also be can not be ignored.Pollutent is washed away and is entered water body by aerial migration, discharge of wastewater, precipitation and ground, the pollutent of the medium-term and long-term existence of water body finally deposits in bed mud and enrichment in bed mud, make bed mud be subject to severe contamination, bed mud is the endogenous pollution source that gush in river, is huge threat to river course.The nutritious element of pollutent, heavy metal, hardly degraded organic substance etc. in bed mud.When pollution substance discharges from bed mud, affect water quality and threaten hydrobiont and human health, cause river course secondary pollution.
It is a great system engineering that comprehensive improvement is gushed in river, and regulation method is gushed for cutting dirt, Sediment Dredging, moisturizing, purification of water quality in conventional river at present.The whole bag of tricks is both advantageous and disadvantageous, therefore for the improvement in different river courses, need to be according to its water quality characteristics and Related Environmental Factors, and choose suitable improvement method or the method mutually combining, reach the most efficient, save the object of environmental protection.Wherein purification of water quality mainly uses Chemical treatment and biological restoration.Chemical process mainly comprises enhanced flocculation, chemical oxidation and chemical precipitation etc.The chemical agent using mainly contains the precipitation agents such as the oxygenant such as coagulating agent, hydrogen peroxide such as molysite and aluminium salt and unslaked lime, reaches and removes target contaminant (suspended substance, dissolved phosphorus and nitrogen etc.) in water, improves the object of water transparency.At present, Zero-valent Iron is applied to and process the method for gushing total nitrogen/total phosphorus/heavy metal in river and also do not study.
Zero-valent Iron can be reduced into the dissolved nitrogen and phosphorus of high valence state and heavy metal the compound of lower valency as the active reductive agent of chemical property, and Zero-valent Iron and hydrous oxide crystal thereof have good absorption property, can adsorb organic compound and heavy metal.Zero-valent Iron due to high-level efficiency, cheap, easily the feature such as obtain, be widely used in various sewage, fuel waste water, mineral ion, heavy metal ion and administer.Existing Zero-valent Iron material is mainly reduced iron powder and cast iron filing.
The present invention utilizes the Zero-valent Iron (reduced iron powder and cast iron filing) of industrial production first after acidifying, directly drops into river water burst sample and carries out oscillatory reaction or post experiment, has larger application prospect because its treatment effect is good, with low cost, simple to operate.
Summary of the invention
The object of the present invention is to provide a kind of Zero-valent Iron to process the method that total nitrogen/total phosphorus/heavy metal is gushed in river.By the reduced iron powder after acidifying or cast iron filing and river water burst sample are carried out to oscillatory reaction or post experiment, utilize the mechanism such as Zero-valent Iron and the direct chemical reaction of river water burst sample, adsorption, Zero-valent Iron can be purified waste water quickly and efficiently, realize object of the present invention.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of Zero-valent Iron is processed the method that total nitrogen/total phosphorus/heavy metal is gushed in river, by the reduced iron powder after acidifying or cast iron filing and river water burst sample are carried out to oscillatory reaction or post experiment, utilize the mechanism such as Zero-valent Iron and the direct chemical reaction of river water burst sample, adsorption, make Zero-valent Iron process total nitrogen, total phosphorus or the heavy metal of river water burst, comprise the steps:
(1) activation of Zero-valent Iron: the Zero-valent Iron of use is the micron-sized reduced iron powder of 100 ~ 200 order or the micron-sized cast iron filing of 10-30 order, reduced iron powder is placed in to the constant-temperature table 130 ~ 200r/min vibration of 15 ~ 35 DEG C with the dilute hydrochloric acid of 0.1 ~ 1mol to be soaked after 10 ~ 60min removes oxide on surface and uses clear water repetitive scrubbing, lyophilize, the reduced iron powder that has obtained activating; Or cast iron filing is first soaked, cleaned to remove surperficial greasy dirt with acetone soln, constant-temperature table 130 ~ 200 r/min vibrations of using again 0.1 ~ 1mol dilute hydrochloric acid to be placed in 15 ~ 35 DEG C are soaked 30 ~ 120min and are removed after oxide on surface and repeatedly clean with clear water, lyophilize, the cast iron filing that has obtained activating;
(2) treatment step is any one in following two kinds of methods:
A, get 80 ~ 100mL river water burst in the screw socket bottle of 100 mL, add activated Zero-valent Iron, each screw socket bottle is with sealing after nitrogen stripping, and sample bottle is placed in to constant-temperature table 130 ~ 200 r/min vibrations of 15 ~ 35 DEG C, the river water burst that obtains processing; Described activated Zero-valent Iron comprise the reduced iron powder having activated or the cast iron filing that activated in more than one;
B, activated Zero-valent Iron is mixed with quartz sand, be added in synthetic glass post, river water burst is injected to the river water burst that obtains processing with the speed of 3 ~ 6mL/min through peristaltic pump from glass column bottom; Described activated Zero-valent Iron comprise the reduced iron powder having activated or the cast iron filing that activated in more than one.
In aforesaid method, described river water burst is Guangzhou Shi Jing river or hunts moral water burst.Shi Jing river quality of river water muddiness, has blackout phenomenon, near have sanitary sewage and the domestic refuse of the discharge of many Residential areass.Hunt moral water burst unlimpid, on the water surface, have many floating matters, near have many wineshops and building operation.
In aforesaid method, in step a, iron powder dosage is 1 ~ 5g/L, and iron filings dosage is 5 ~ 20g/L.
In aforesaid method, the quartz sand of the iron powder that in step b, the blending ratio of Zero-valent Iron and quartz sand is 1 ~ 3g or iron filings and 40 ~ 60g.
In aforesaid method, in step b, glass column is 18cm(L) the synthetic glass post of * 1.6cm (), fill method for the glass fibre from 0.5 ~ 1cm to packing height in post or the particle diameter that are be 1 ~ 2mm granulated glass sphere, continue to insert activated Zero-valent Iron and quartz sand mixture, constantly shake synthetic glass post simultaneously, with the homogeneity that ensures that pillar is filled, then insert the granulated glass sphere that glass fibre that 0.5 ~ 1cm is high or particle diameter are 1 ~ 2mm at top; After filling, in post, pump into distilled water 10 ~ 30min with peristaltic pump; Glass fibre: Zero-valent Iron quartz sand mixture: the aspect ratio of glass fibre is 0.5 ~ 1cm:16 ~ 17cm:0.5 ~ 1cm.
In aforesaid method, in the water burst of described river, heavy metal is copper or chromium.
In aforesaid method, in the time processing containing chromium river water burst, by the pH regulator of river water burst, to pH=4.0, the initial pH of former water is not all adjusted in all the other experiments.
In aforesaid method, the river water burst of processing is that raw water quality TN is 4.8798mg/L, TP is 0.7474mg/L, pH is that 6.86, Cu (II) is 0.009mg/L, and stone well river or raw water quality that Cr (VI) is 0.012mg/L are that TN is 0.5436mg/L, TP is 0.5255mg/L, pH is that 6.96, Cu (II) is 0.007mg/L, and what Cr (VI) was 0.008mg/L hunts moral water burst.
The present invention is mainly for the exploitation of canal reactor treatment process.The present invention utilizes the ultimate principles such as the adsorption of Zero-valent Iron and the direct reduction reaction of river water burst sample, Zero-valent Iron and hydrous oxide crystal thereof, processes river and gushes total nitrogen/total phosphorus/heavy metal, and canal reactor is purified.
Compared with the present invention is gushed technology with existing processing river, tool has the following advantages and beneficial effect:
1, practical.This invention can be processed the many indexs such as the total nitrogen/total phosphorus/heavy metal in canal reactor, and process the research of gushing middle chromium in river except Zero-valent Iron initial former water pH is adjusted to 4.0 to reach best removal effect, the initial pH of former water is not all adjusted in all the other experiments, aspect the water burst processing of actual river, is having good application prospect.
2, treatment effect is good.Zero-valent Iron reaches more than 68% the clearance of Cu (II) in oscillation experiment, and the clearance of Cr (VI) is approached to 100%; More than Zero-valent Iron reaches 75.67mg/g to the removal capacity of Cu (II) in post experiment.
3, technique is simple.The whole technique of the present invention only need be by Zero-valent Iron acidifying, then puts into river and gushes in waste water or waste water is gushed in river and pump in the synthetic glass post containing Zero-valent Iron, without other complicated flow processs, is easy to apply.
4, cost is low.Except constant-temperature table, peristaltic pump, synthetic glass post, quartz sand and Zero-valent Iron and basic chemical reagent, without specific apparatus and expensive reagent.
5, operational safety.The present invention is without adding poisonous Harmful chemicals.
Brief description of the drawings
Fig. 1 is iron powder and the iron filings removal effect figure to Shi Jing river TN of embodiment 1 through acidifying;
To be embodiment 2 gush the removal effect figure of TP through the iron powder of acidifying and iron filings to Fig. 2 to hunting moral;
Fig. 3 is embodiment 3 gushes Cu (II) to hunting moral removal effect figure through the iron filings of acidifying;
Fig. 4 removal effect figure to Shi Jing river Cr (VI) that is embodiment 4 through the iron powder of acidifying;
Fig. 5 is iron powder and the iron filings removal capacity plan to Shi Jing river Cu (II) of embodiment 5 through acidifying;
Fig. 6 is iron powder and the iron filings removal effect figure to Shi Jing river TP of embodiment 6 through acidifying;
Fig. 7 removal effect figure to Shi Jing river Cu (II) that is embodiment 7 through the iron filings of acidifying;
Fig. 8 be embodiment 8 through the 5g/L of acidifying iron filings the removal effect figure to Shi Jing river Cr (VI);
Fig. 9 be embodiment 9 through the 10g/L of acidifying iron filings the removal effect figure to Shi Jing river Cr (VI).
Embodiment
Following examples are to further illustrate of the present invention.
In embodiment, in stone well river sample used, TN is 4.8798mg/L, TP is 0.7474mg/L, pH is 6.86, Cu (II) is 0.009mg/L, and Cr (VI) is 0.012mg/L, and hunting TN in moral water burst sample is 0.5436mg/L, TP is 0.5255mg/L, pH is that 6.96, Cu (II) is 0.007mg/L, and Cr (VI) is 0.008mg/L.Because the content of former Cu in some water samples (II) and Cr (VI) is lower, thus utilize that former water sample has configured 8,45, the Cu (II) of 85mg/L and 100mg/L and 10,50 and Cr (VI) simulated water sample of 100mg/L test.
In enforcement, the activation method of activated iron powder is: reduced iron powder is placed in after 30min removal oxide on surface is soaked in constant temperature (25 DEG C) shaking table 150r/min vibration and uses clear water repetitive scrubbing with the dilute hydrochloric acid of 0.2mol/L, and natural air drying, to obtain final product.
The activation method of activated iron filings is: cast iron filing is first soaked, cleaned to remove surperficial greasy dirt with acetone soln, being placed in constant temperature (25 DEG C) shaking table 150r/min vibration with 0.2mol/L dilute hydrochloric acid again soaks 1h and removes after oxide on surface and repeatedly clean with clear water, natural air drying, to obtain final product.
embodiment 1
Get 100 mL stone well river samples in the screw socket bottle of 100 mL, initial pH is 6.86, add respectively the activated iron powder of 1g/L and 5g/L and the activated iron filings of 20g/L, each test sample bottle is with sealing after nitrogen stripping, and sample bottle is placed in to constant temperature (25 DEG C) shaking table 150r/min oscillatory reaction, measure the rear water sample TN of former water sample and reaction, TN clearance was respectively for 43.02%, 62.97% and 22.01% (as shown in Figure 1).
embodiment 2
Get 100 mL and hunt moral water burst sample in the screw socket bottle of 100 mL, initial pH is 6.96, add respectively the activated iron powder of 1g/L and 5g/L and the activated iron filings of 20g/L, each test sample bottle is with sealing after nitrogen stripping, and sample bottle is placed in to constant temperature (25 DEG C) shaking table l50r/min oscillatory reaction, measure the rear water sample TP of former water sample and reaction, TP clearance was respectively for 56.18%, 60.93% and 23.60% (as shown in Figure 2).
embodiment 3
Getting 100 mL hunts moral and gushes simulated water sample (Cu (II) concentration is respectively 8 mg/L, 45 mg/L and 85mg/L) in the screw socket bottle of 100 mL, initial pH is 4.87, add the activated iron filings of 5g/L, each test sample bottle is with sealing after nitrogen stripping, and sample bottle is placed in to constant temperature (25 DEG C) shaking table 150r/min oscillatory reaction, measure the rear water sample Cu (II) of former water sample and reaction, along with the increase of Cu (II) starting point concentration, speed of reaction and clearance all reduce, Cu (II) clearance is respectively 90.7%, 82.17% and 77.9% (as shown in Figure 3).
embodiment 4
Get 100 mL Shi Jing river simulated water sample (Cr (VI) concentration is respectively 10 mg/L, 50 mg/L and 100mg/L) in the screw socket bottle of 100 mL, regulate initial pH to 4.0, add the activated iron powder of 5g/L, each test sample bottle is with sealing after nitrogen stripping, and sample bottle is placed in to constant temperature (25 DEG C) shaking table 150r/min oscillatory reaction, measure the rear water sample Cr (VI) of former water sample and reaction, along with the increase of Cr (VI) starting point concentration, speed of reaction declines, and clearance all approached for 100% (as shown in Figure 4).
embodiment 5
Get excessive Shi Jing river simulated water sample (Cu (II) concentration 100mg/L), initial pH is 4.87, respectively iron powder activated 1g or iron filings are mixed with the quartz sand of 44.3g, be added to synthetic glass post (18cm(L) * 1.6cm ()) in, glass fibre (height 0.5cm): iron powder quartz sand mixture (height 17cm): glass fibre (height 0.5cm)=1:34:1.Simulated water sample is injected from glass column bottom through peristaltic pump with the speed of 5mL/min, the heavy metal concentration of measuring former water sample and the different time water outlet of glass column top, is respectively 78.60mg/g and 75.67mg/g (Fig. 5) to the removal capacity of Cu (II) after 3h.The removal capacity 0.84mg/g of the gac that 1g empty fruit cluster is made to 100mLCu (II) solution, gac that 0.5g oil palm core the is made removal capacity 3.9293mg/g to 30mLCu (II) solution, the removal capacity 20.8mg/g of the gac that 0.5g Kapok bark is made to 50mLCu (II) solution, far below the removal capacity of this example.
embodiment 6
Get 100 mL stone well river samples in the screw socket bottle of 100 mL, initial pH is 6.86, add respectively the activated iron powder of 1g/L and 5g/L and the activated iron filings of 20g/L, each test sample bottle is with sealing after nitrogen stripping, and sample bottle is placed in to constant temperature (25 DEG C) shaking table l50r/min oscillatory reaction, measure the rear water sample TP of former water sample and reaction, TP clearance was respectively for 59.37%, 61.33% and 24.26% (as shown in Figure 6).
embodiment 7
Get 100 mL Shi Jing river simulated water sample (Cu (II) concentration is respectively 8 mg/L, 45 mg/L and 85mg/L) in the screw socket bottle of 100 mL, add the activated iron filings of 5g/L, each test sample bottle is with sealing after nitrogen stripping, and sample bottle is placed in to constant temperature (25 DEG C) shaking table 150r/min oscillatory reaction, measure the rear water sample Cu (II) of former water sample and reaction, along with the increase of Cu (II) starting point concentration, speed of reaction and clearance all reduce, Cu (II) clearance was respectively for 88.27%, 79.13% and 68.02% (as shown in Figure 7).
embodiment 8
(Cr (VI) concentration is respectively 10 mg/L to get 100 mL Shi Jing river simulated water sample, 50 mg/L and 100mg/L) in the screw socket bottle of 100 mL, regulate initial pH to 4.0, add the activated iron filings of 5g/L, each test sample bottle is with sealing after nitrogen stripping, and sample bottle is placed in to constant temperature (25 DEG C) shaking table 150r/min oscillatory reaction, measure the rear water sample Cr (VI) of former water sample and reaction, along with the increase of Cr (VI) starting point concentration, speed of reaction declines, in the time that Cr (VI) concentration is 100mg/L, clearance is 92.74%, when Cr (VI) concentration is 10 mg/L, when 50 mg/L, clearance all approached for 100% (as shown in Figure 8).
embodiment 9
Get 100 mL Shi Jing river simulated water sample (Cr (VI) concentration is respectively 10 mg/L, 50 mg/L and 100mg/L) in the screw socket bottle of 100 mL, regulate initial pH to 4.0, add the activated iron filings of 10g/L, each test sample bottle is with sealing after nitrogen stripping, and sample bottle is placed in to constant temperature (25 DEG C) shaking table 150r/min oscillatory reaction, measure the rear water sample Cr (VI) of former water sample and reaction, along with the increase of Cr (VI) starting point concentration, speed of reaction declines, and clearance all approached for 100% (as shown in Figure 9).
Above-described embodiment is only preferred embodiment of the present invention, is not used for limiting practical range of the present invention.Be that all equalizations of doing according to content of the present invention change and modify, all by the claims in the present invention scope required for protection is contained.
Claims (8)
1. Zero-valent Iron is processed the method that total nitrogen/total phosphorus/heavy metal is gushed in river, it is characterized in that, comprises the steps:
(1) activation of Zero-valent Iron: the Zero-valent Iron of use is the micron-sized reduced iron powder of 100 ~ 200 order or the micron-sized cast iron filing of 10-30 order, reduced iron powder is placed in to the constant-temperature table 130 ~ 200r/min vibration of 15 ~ 35 DEG C with the dilute hydrochloric acid of 0.1 ~ 1mol to be soaked after 10 ~ 60min removes oxide on surface and uses clear water repetitive scrubbing, lyophilize, the reduced iron powder that has obtained activating; Or cast iron filing is first soaked, cleaned to remove surperficial greasy dirt with acetone soln, constant-temperature table 130 ~ 200 r/min vibrations of using again 0.1 ~ 1mol dilute hydrochloric acid to be placed in 15 ~ 35 DEG C are soaked 30 ~ 120min and are removed after oxide on surface and repeatedly clean with clear water, lyophilize, the cast iron filing that has obtained activating;
(2) treatment step is any one in following two kinds of methods:
A, get 80 ~ 100mL river water burst in the screw socket bottle of 100 mL, add activated Zero-valent Iron, each screw socket bottle is with sealing after nitrogen stripping, and sample bottle is placed in to constant-temperature table 130 ~ 200 r/min vibrations of 15 ~ 35 DEG C, the river water burst that obtains processing; Described activated Zero-valent Iron comprise the reduced iron powder having activated or the cast iron filing that activated in more than one;
B, activated Zero-valent Iron is mixed with quartz sand, be added in synthetic glass post, river water burst is injected to the river water burst that obtains processing with the speed of 3 ~ 6mL/min through peristaltic pump from glass column bottom; Described activated Zero-valent Iron comprise the reduced iron powder having activated or the cast iron filing that activated in more than one.
2. Zero-valent Iron according to claim 1 is processed the method that total nitrogen/total phosphorus/heavy metal is gushed in river, it is characterized in that described river water burst is Guangzhou Shi Jing river or hunts moral water burst.
3. Zero-valent Iron is processed the method that total nitrogen/total phosphorus/heavy metal is gushed in river according to claim 1, it is characterized in that in step a, and iron powder dosage is 1 ~ 5g/L, and iron filings dosage is 5 ~ 20g/L.
4. Zero-valent Iron is processed the method that total nitrogen/total phosphorus/heavy metal is gushed in river according to claim 1, it is characterized in that the quartz sand of the iron powder that in step b, the blending ratio of Zero-valent Iron and quartz sand is 1 ~ 3g or iron filings and 40 ~ 60g.
5. Zero-valent Iron is processed the method that total nitrogen/total phosphorus/heavy metal is gushed in river according to claim 1, it is characterized in that, in step b, glass column is 18cm(L) the synthetic glass post of * 1.6cm (), fill method for the glass fibre from 0.5 ~ 1cm to packing height in post or the particle diameter that are be 1 ~ 2mm granulated glass sphere, continue to insert activated Zero-valent Iron and quartz sand mixture, constantly shake synthetic glass post simultaneously, with the homogeneity that ensures that pillar is filled, then insert the granulated glass sphere that glass fibre that 0.5 ~ 1cm is high or particle diameter are 1 ~ 2mm at top; After filling, in post, pump into distilled water 10 ~ 30min with peristaltic pump; Glass fibre: Zero-valent Iron quartz sand mixture: the aspect ratio of glass fibre is 0.5 ~ 1cm:16 ~ 17cm:0.5 ~ 1cm.
6. Zero-valent Iron is processed the method that total nitrogen/total phosphorus/heavy metal is gushed in river according to claim 2, it is characterized in that in the water burst of described river, heavy metal is copper or chromium.
7. Zero-valent Iron is processed the method that total nitrogen/total phosphorus/heavy metal is gushed in river according to claim 1, it is characterized in that, in the time processing containing chromium river water burst, to pH=4.0, the initial pH of former water is not all adjusted in all the other experiments by the pH regulator of river water burst.
8. Zero-valent Iron is processed the method that total nitrogen/total phosphorus/heavy metal is gushed in river according to claim 2, it is characterized in that, the river water burst of processing is that raw water quality TN is 4.8798mg/L, TP is 0.7474mg/L, pH is 6.86, Cu (II) is 0.009mg/L, stone well river or raw water quality that Cr (VI) is 0.012mg/L are that TN is 0.5436mg/L, TP is 0.5255mg/L, pH is 6.96, Cu (II) is 0.007mg/L, and what Cr (VI) was 0.008mg/L hunts moral water burst.
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| CN106277274A (en) * | 2016-09-20 | 2017-01-04 | 绍兴文理学院 | One utilizes pyrite and Zero-valent Iron mixed processing heavy metal ion-containing waste water method |
| CN106277269A (en) * | 2016-09-20 | 2017-01-04 | 绍兴文理学院 | The method that pyrite repairs pollutant effluents with Zero-valent Iron as PRB active filler |
| CN106348419A (en) * | 2016-09-20 | 2017-01-25 | 绍兴文理学院 | Method for polluted wastewater restoration by taking natural pyrrhotite and zero-valent iron as PRB (permeable reactive barrier) active filler |
| CN106277269B (en) * | 2016-09-20 | 2020-04-14 | 绍兴文理学院 | Method for restoring polluted wastewater by using pyrite and zero-valent iron as PRB active filler |
| CN106348419B (en) * | 2016-09-20 | 2020-04-14 | 绍兴文理学院 | Method for repairing polluted wastewater by using natural pyrrhotite and zero-valent iron as PRB active filler |
| CN106242013B (en) * | 2016-09-20 | 2020-04-14 | 绍兴文理学院 | Method for treating heavy metal ion-containing wastewater by mixing natural pyrrhotite and zero-valent iron |
| CN106277274B (en) * | 2016-09-20 | 2020-04-14 | 绍兴文理学院 | Method for treating heavy metal ion-containing wastewater by mixing pyrite and zero-valent iron |
| US10676376B2 (en) | 2016-09-29 | 2020-06-09 | Ecolab Usa Inc. | Modification of iron-based media for water treatment |
| CN110314655A (en) * | 2019-06-03 | 2019-10-11 | 武汉工程大学 | A kind of bagasse load zeroth order iron adsorbent and its preparation method and application |
| CN110314655B (en) * | 2019-06-03 | 2022-05-10 | 武汉工程大学 | Bagasse-loaded zero-valent iron adsorbent and preparation method and application thereof |
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