Soil remediation agent used for heavy metal pollution and preparation method thereof
A soil remediation agent and a technology of heavy metals, applied in the field of soil remediation, can solve the problems of limited use of soil and the disappearance of soil value, etc., and achieve the effect of good removal effect, wide sources and broad application prospects
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[0018] Example 1
[0019] A soil remediation agent for heavy metal pollution, comprising the following parts by weight of raw materials: 45 parts of clay minerals, 24 parts of straw, 10 parts of chitosan, 5 parts of alfalfa, and 6 parts of polydimethyldiallylammonium chloride , 8 parts of water-soluble polyvinyl alcohol, 1.5 parts of guar gum, 4 parts of sodium carbonate, 5 parts of metal oxides and 2 parts of sodium humate. Clay minerals include attapulgite and a mixture of montmorillonite and kaolin. The metal oxide includes a mixture of magnesium oxide, sodium oxide and potassium oxide, and the straw is sugarcane straw.
[0020] The specific steps of the method for preparing the soil remediation agent for heavy metal pollution are as follows:
[0021] Step 1: Mix sodium carbonate with straw and heat it at 480 degrees Celsius in isolation from the air, cool it naturally to room temperature and pulverize to 160 mesh to obtain the first mixture;
[0022] Step 2: Crush the alfalfa, th...
Example Embodiment
[0026] Example 2
[0027] A soil remediation agent for heavy metal pollution, comprising the following parts by weight of raw materials: 52 parts of clay minerals, 28 parts of straw, 11.5 parts of chitosan, 6 parts of alfalfa, and 7.5 parts of polydimethyldiallylammonium chloride , 11 parts of water-soluble polyvinyl alcohol, 2 parts of guar gum, 4.8 parts of sodium carbonate, 7.5 parts of metal oxides and 3 parts of sodium humate. Clay minerals include a mixture of sepiolite, palygorskite and illite. The particle size of the clay mineral is 0.12 mm.
[0028] The specific steps of the method for preparing the soil remediation agent for heavy metal pollution are as follows:
[0029] Step 1: Mix sodium carbonate and straw, heat it at 450 degrees Celsius in isolation from the air, cool it naturally to room temperature and pulverize it to 180 mesh to obtain the first mixture;
[0030] Step 2: Crush the alfalfa, then extract with 0.75mol / L hydrochloric acid solution for 88 minutes. The ma...
Example Embodiment
[0034] Example 3
[0035] A soil remediation agent for heavy metal pollution, comprising the following raw materials in parts by weight: 61 parts of clay minerals, 30 parts of straw, 13 parts of chitosan, 7.5 parts of alfalfa, and 8 parts of polydimethyldiallylammonium chloride , 14 parts of water-soluble polyvinyl alcohol, 2.5 parts of guar gum, 5.5 parts of sodium carbonate, 9 parts of metal oxides, and 4.2 parts of sodium humate. Clay minerals include a mixture of palygorskite, illite, montmorillonite and kaolin. The particle size of the clay mineral is 0.08 mm.
[0036] The specific steps of the method for preparing the soil remediation agent for heavy metal pollution are as follows:
[0037] Step 1: Mix sodium carbonate with straw and heat at 485 degrees Celsius in isolation from air, cool to room temperature naturally and pulverize to 200 mesh to obtain the first mixture;
[0038] Step 2: Crush the alfalfa, then extract with 0.75 mol / L hydrochloric acid solution for 88 minutes....
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