CN102084769A - Method for reducing quantity of cadmium absorbed from soil by little cabbages - Google Patents
Method for reducing quantity of cadmium absorbed from soil by little cabbages Download PDFInfo
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- CN102084769A CN102084769A CN2010105230251A CN201010523025A CN102084769A CN 102084769 A CN102084769 A CN 102084769A CN 2010105230251 A CN2010105230251 A CN 2010105230251A CN 201010523025 A CN201010523025 A CN 201010523025A CN 102084769 A CN102084769 A CN 102084769A
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Abstract
The invention relates to a method for reducing quantity of cadmium absorbed from soil by little cabbages, which belongs to the technical field of vegetables. The method comprises the steps of: adding a cadmium chloride solution and a modulator to soil; then planting little cabbages, watering, fertilizing and receiving sunshine exposure; clearly washing the little cabbages growing to be ripe after four months, and dividing the little cabbages into three parts of root, stem and leaf, then respectively drying in a drying oven, grinding with a mortar after drying and screening with a sieve of 200 meshes; sintering, digesting, transferring liquid in a digestion tank to a 50ml measuring flask with a transfer pipette, washing the digestion tank 3 times with 0.2 percent nitric acid, transferring a cleaning solution to the measuring flask; and directly adding 0.2 percent nitric acid to reach the scale of the measuring flask for metering volume, uniformly stirring and then filtering to obtain a final sample. The quantity of the cadmium absorbed by the little cabbages is reduced by adding the modulator in the soil, which is safe and healthy for the human eating the little cabbages.
Description
Technical field
The present invention relates to a kind of method that a variety of Chinese cabbage absorbs cadmium in the soil that reduces, belong to the vegetables technical field.
Background technology
Can classify agricultural product on the vegetable stall in supermarket, " non-polluted farm product " is a class wherein.Find by inspection information: " non-polluted farm product is exactly vegetables are not subjected to poisonous and harmful substance in the process of growth pollution, and it also is very important that the soil of agricultural product is not polluted by noxious material.Material in the soil by root absorption in the body of plant.
China is subjected to the nearly 2.0 * 107m2 of arable area of heavy metal pollutions such as cadmium, arsenic, lead at present, account for 1/5 of total area under cultivation, China surpasses 1.0 * 107t because of the heavy metal pollution underproduction grain every year, contaminated by heavy metals in addition grain also reaches 1.2 * 107t every year, and the economic loss that causes thus total is at least 20,000,000,000 yuan.Took place to cause whole people from village cadmium poisoning phenomenon in various degree to occur because the sewage of a tame chemical plant emission is not up to standard in the zhuzhou, hunan province city, the cereal of this area and leaf dish all do not allow to eat.
Cadmium is one of hypertoxic metallic element of current heavy metal pollution area maximum, is called as " first of the five poisonous creatures: scorpion, viper, centipede, house lizard, toad ", and the cadmium metal pollution can cause crop failure and quality to descend, and the animal and human is had very strong toxic action.Its toxic action mainly be since cadmium enter in the human body with body on the zymoprotein-S-H and-S-key strong bonded, thereby make protein denaturation, enzyme loses activity, and the infringement on the 26S Proteasome Structure and Function appears in histocyte, thereby cause chronic disease, as renal function reduction, anemia, hypertension etc.
Summary of the invention
The present invention seeks in order to propose a kind of method that a variety of Chinese cabbage absorbs cadmium in the soil that reduces, this method can suppress the absorption of a variety of Chinese cabbage to cadmium in the soil.
The objective of the invention is to be achieved through the following technical solutions.
A kind of method that a variety of Chinese cabbage absorbs cadmium in the soil that reduces of the present invention, the concrete steps of this method are:
1) preparation of compost
The configuration cadmium chloride solution is put into the mixture of the black earth of cadmium chloride solution and 1.5 kilograms in flowerpot; Put into adjusting control agent then and suppress a variety of Chinese cabbage absorption heavy metal; Adjusting control agent is CaCO
3, a kind of in zinc sulphate or the humic acid;
2) plantation a variety of Chinese cabbage
A variety of Chinese cabbage on carrying in the flowerpot in step 1) is watered then, applies fertilizer and accepts the irradiation of sunlight; A variety of Chinese cabbage growth and maturity after four months;
3) a variety of Chinese cabbage is cleaned up, and resolve into root, stem, leaf three parts, dry in baking oven respectively then, temperature is set at 60 ℃; Oven dry back mortar is also crossed 200 mesh sieves;
4) root that step 3) is obtained, stem, leaf are respectively put in the crucible, and place Muffle furnace to calcine, and temperature is 600 ℃, calcining 2h, cooling naturally then;
5) root, stem, the leaf after will calcining is put in the counteracting tank, adds 3mL nitric acid, 1mL perchloric acid, 1mL hydrofluoric acid respectively, places 12h, then in the counteracting tank jar is put in the iron flask, in baking oven, heat, keep 100 ℃ of heating 1h earlier, temperature is elevated to 170 ℃ then, heating 8h;
6) counteracting tank is taken out, be placed on 200 ℃ the electric hot plate, till the only surplus 1 soybean grain size of the liquid in jar;
7) liquid in the counteracting tank is moved on in the volumetric flask of 50ml with pipette, nitric acid washing counteracting tank with 0.2% 3 times, and cleaning fluid also moved on in the volumetric flask, directly be added to the graduation mark place constant volume of volumetric flask afterwards again with 0.2% nitric acid, behind the mixing it is carried out suction filtration and obtain final sample.
The final sample that obtains is measured with atomic absorption spectrophotometer.To prepare variable concentrations cadmium standard liquid so that the cadmium normal concentration curve that draws before measuring cadmium content.The concentration that utilization is bought is diluted preparation for the cadmium standard liquid of 1mg/L, put into the 50ml volumetric flask with pipette, extract primary standard solution 0.5ml during preparation, the nitric acid constant volume of adding 0.2% is to 50ml graduation mark place, so just having prepared concentration has been the cadmium solution of 0.01mg/L, make the standard liquid that concentration is 0.02mg/L, 0.04mg/L, 0.06mg/L according to the method successively, add concentration and be 0 0.2% nitric acid and come to 5 kinds of solution, with above 5 numerical value input computer program, test respectively then.Tested the concentration that just begins to measure cadmium in the sample after the standard sample.
Beneficial effect
The present invention makes the amount of a variety of Chinese cabbage absorption cadmium reduce by add adjusting control agent in soil, and is safer, healthy concerning the mankind of edible a variety of Chinese cabbage.
Description of drawings
Fig. 1 is the canonical plotting of cadmium concentration and absorbance.
Embodiment
Embodiment
A kind of method that reduces cadmium in a variety of Chinese cabbage absorption soil, the concrete steps of this method are:
1) preparation of compost
In flowerpot A and flowerpot B, put into respectively 1.5 kilograms black earth in contrast 1 and the contrast 2; Configuration concentration is the cadmium chloride solution of 0.00027M, puts into the mixture of the black earth of cadmium chloride solution and 1.5 kilograms in flowerpot 3, flowerpot 4 and flowerpot 5 respectively; In the black earth CaCO3 content be 0.4%, zinc ion content 0.2mg/kg, humic acid content 0.2g/kg, in flowerpot 3, put into CaCO then
3Adjusting control agent, put into the zinc sulphate adjusting control agent in flowerpot 4, put into the humic acid adjusting control agent at flowerpot 5, the soil constituent preparation is as shown in table 1:
Table 1 soil constituent preparation table
| Numbering | Adjusting control agent | Adjusting control agent addition (g) | Cadmium addition (mg/kg) | Add cadmium chloride solution amount (ml) |
| 1 | Contrast 1 | ?0 | 0 | |
| 2 | Contrast 2 | ?0 | 0 | |
| 3 | CaCO 3 | ?6 | 10 | 500 |
| 4 | Zinc sulphate | ?0.372 | 10 | 500 |
| 5 | Humic acid | ?0.6 | 10 | 500 |
2) plantation a variety of Chinese cabbage
A variety of Chinese cabbage on carrying in the flowerpot in step 1) is watered then, applies fertilizer and accepts the irradiation of sunlight; A variety of Chinese cabbage growth and maturity after four months;
3) a variety of Chinese cabbage is cleaned up, and resolve into root, stem, leaf three parts, dry in baking oven respectively then, temperature is set at 60 ℃; Oven dry back mortar is also crossed 200 mesh sieves;
4) root that step 3) is obtained, stem, leaf are respectively put in the crucible, and place Muffle furnace to calcine, and temperature is 600 ℃, calcining 2h, cooling naturally then;
5) root, stem, the leaf after will calcining is put in the counteracting tank, adds 3mL nitric acid, 1mL perchloric acid, 1mL hydrofluoric acid respectively, places 12h, then in the counteracting tank jar is put in the iron flask, in baking oven, heat, keep 100 ℃ of heating 1h earlier, temperature is elevated to 170 ℃ then, heating 8h;
6) counteracting tank is taken out, be placed on 200 ℃ the electric hot plate, till the only surplus 1 soybean grain size of the liquid in jar;
7) liquid in the counteracting tank is moved on in the volumetric flask of 50ml with pipette, nitric acid washing counteracting tank with 0.2% 3 times, and cleaning fluid also moved on in the volumetric flask, directly be added to the graduation mark place constant volume of volumetric flask afterwards again with 0.2% nitric acid, behind the mixing it is carried out suction filtration and obtain final sample.
The final sample that obtains is measured with atomic absorption spectrophotometer.To prepare variable concentrations cadmium standard liquid so that the cadmium normal concentration curve that draws before measuring cadmium content.The concentration that utilization is bought is diluted preparation for the cadmium standard liquid of 1mg/L, put into the 50ml volumetric flask with pipette, extract primary standard solution 0.5ml during preparation, the nitric acid constant volume of adding 0.2% is to 50ml graduation mark place, so just having prepared concentration has been the cadmium solution of 0.01mg/L, make the standard liquid that concentration is 0.02mg/L, 0.04mg/L, 0.06mg/L according to the method successively, add concentration and be 0 0.2% nitric acid and come to 5 kinds of solution, its calibration curve as shown in Figure 1, with above 5 numerical value input computer program, test respectively then.Tested the concentration that just begins to measure cadmium in the sample after the standard sample.
The increase and decrease that each position of a variety of Chinese cabbage that obtains at last contains Cd amount comparison photograph relatively sees Table 2:
Each position of table 2 pair a variety of Chinese cabbage contains the increase and decrease of Cd amount comparison photograph and compares
Claims (1)
1. one kind is reduced the method that a variety of Chinese cabbage absorbs cadmium in the soil, it is characterized in that: configuration soil: the mixture of putting into the black earth of cadmium chloride solution and 1.5 kilograms in flowerpot; Put into adjusting control agent then; Adjusting control agent is CaCO
3, a kind of in zinc sulphate or the humic acid; The addition of adjusting control agent is 6g CaCO
3, 0.372g zinc sulphate or 0.6g humic acid;
The concentration of cadmium chloride solution is 0.00027mol/L, and the cadmium chloride solution addition is 500mL.
1) a kind of method of testing that reduces cadmium in a variety of Chinese cabbage absorption soil is characterized in that:
2) in the mixture of caddy and black earth, carrying a variety of Chinese cabbage, watering then, apply fertilizer and accept the irradiation of sunlight; A variety of Chinese cabbage growth and maturity after four months;
3) a variety of Chinese cabbage is cleaned up, and resolve into root, stem, leaf three parts, dry in baking oven respectively then, temperature is set at 60 ℃; Oven dry back mortar is also crossed 200 mesh sieves;
4) root that step 3) is obtained, stem, leaf are respectively put in the crucible, and place Muffle furnace to calcine, and temperature is 600 ℃, calcining 2h, cooling naturally then;
5) root, stem, the leaf after will calcining is put in the counteracting tank, adds 3mL nitric acid, 1mL perchloric acid, 1mL hydrofluoric acid respectively, places 12h, then in the counteracting tank jar is put in the iron flask, in baking oven, heat, keep 100 ℃ of heating 1h earlier, temperature is elevated to 170 ℃ then, heating 8h;
6) counteracting tank is taken out, be placed on 200 ℃ the electric hot plate, till the only surplus 1 soybean grain size of the liquid in jar;
7) liquid in the counteracting tank is moved on in the volumetric flask of 50ml with pipette, nitric acid washing counteracting tank with 0.2% 3 times, and also move on to cleaning fluid in the volumetric flask, directly be added to the graduation mark place constant volume of volumetric flask afterwards again with 0.2% nitric acid, behind the mixing it is carried out suction filtration and obtain final sample, at last final sample is tested, the cadmium that a variety of Chinese cabbage absorbs in the soil has reduced.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102379173A (en) * | 2011-08-18 | 2012-03-21 | 中国烟草总公司郑州烟草研究院 | Method for reducing content of cadmium in tobacco leaf produced in soil polluted by cadmium |
| CN103143556A (en) * | 2013-02-07 | 2013-06-12 | 广东省农业科学院农业资源与环境研究所 | Passivating agent for reducing cadmium activity of acidic vegetable soil and use method thereof |
| CN103497010A (en) * | 2013-09-23 | 2014-01-08 | 丽水学院 | Methods for reducing cadmium content in cadmium polluted mushroom-stick lentinula edodes fruiting bodies |
| CN104931330A (en) * | 2015-06-11 | 2015-09-23 | 大连谱尼测试科技有限公司 | Digestion method of detection of heavy metals in soil |
| CN106167707A (en) * | 2016-07-22 | 2016-11-30 | 华中农业大学 | Plantula Brassicae chinensis rhizosphere cadmium resistance control agent and its preparation method and application |
| CN108033861A (en) * | 2018-01-18 | 2018-05-15 | 深圳市娅安科技有限公司 | A kind of fruits and vegetables planting soil and its implantation methods |
| CN108056002A (en) * | 2017-12-26 | 2018-05-22 | 湖南省园艺研究所 | Potting mixed-matrix increases zinc resistance cadmium method |
-
2010
- 2010-10-28 CN CN2010105230251A patent/CN102084769A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102379173A (en) * | 2011-08-18 | 2012-03-21 | 中国烟草总公司郑州烟草研究院 | Method for reducing content of cadmium in tobacco leaf produced in soil polluted by cadmium |
| CN103143556A (en) * | 2013-02-07 | 2013-06-12 | 广东省农业科学院农业资源与环境研究所 | Passivating agent for reducing cadmium activity of acidic vegetable soil and use method thereof |
| CN103143556B (en) * | 2013-02-07 | 2015-06-17 | 广东省农业科学院农业资源与环境研究所 | Passivating agent for reducing cadmium activity of acidic vegetable soil and use method thereof |
| CN103497010A (en) * | 2013-09-23 | 2014-01-08 | 丽水学院 | Methods for reducing cadmium content in cadmium polluted mushroom-stick lentinula edodes fruiting bodies |
| CN103497010B (en) * | 2013-09-23 | 2016-05-11 | 丽水学院 | Reduce the method for cadmium content in cadmium pollution bacterium bar spices massee fruiting bodies |
| CN104931330A (en) * | 2015-06-11 | 2015-09-23 | 大连谱尼测试科技有限公司 | Digestion method of detection of heavy metals in soil |
| CN106167707A (en) * | 2016-07-22 | 2016-11-30 | 华中农业大学 | Plantula Brassicae chinensis rhizosphere cadmium resistance control agent and its preparation method and application |
| CN108056002A (en) * | 2017-12-26 | 2018-05-22 | 湖南省园艺研究所 | Potting mixed-matrix increases zinc resistance cadmium method |
| CN108033861A (en) * | 2018-01-18 | 2018-05-15 | 深圳市娅安科技有限公司 | A kind of fruits and vegetables planting soil and its implantation methods |
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Application publication date: 20110608 |