Sulfonated humic acid adsorption passivation repairing agent
A technology of sulfonated humic acid and repair agent, which is applied in chemical instruments and methods, restoration of polluted soil, organic fertilizer, etc., can solve the problem of long-term maintenance of heavy metal passivation state, high cost, large-scale application, and small adsorption capacity Difficult to satisfy
Inactive Publication Date: 2018-04-06
广东万山环境科技有限公司
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Problems solved by technology
[0067] The purpose of the present invention is to develop a kind of new adsorption passivation repair agent, overcome existing passivation repair method (carbonate, hydroxide, organic compound, sulfide passivation and existing adsorption passivation) cannot make Effective control of heavy metals in contaminated cultivated land soil (effectiveness and reliability), inability to maintain the passivation state of heavy metals under farming conditions for a long time, to overcome the large particle size of industrial sulfonated coal, which is not suitable for use in soil, and small adsorption capacity It is difficult to meet the shortcomings of heavy pollution remediation, high cost and cannot be applied in a large area, and solve the needs of soil remediation of heavy metal polluted cultivated land in my country in terms of effectiveness, reliability and durability
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[0132] Below in conjunction with specific example the technical scheme of the present invention is further described in detail:
[0133] A sulfonated humic acid adsorption passivation restoration agent, the main raw materials of the sulfonated humic acid adsorption passivation restoration agent include lignite, concentrated sulfuric acid, oxidant, distilled water, ammonium sulfate, ammonia water and ammonium bicarbonate.
[0134] The consumption (mass parts) of each raw material is:
[0135]
[0136] The consumption (mass parts) of each raw material is:
[0137]
[0138] The oxidizing agent is hydrogen peroxide or manganese dioxide.
[0139] 1. A production process of sulfonated humic acid adsorption passivation restoration agent, carried out successively according to the following steps:
[0140] Step 1: Select lignite raw materials with humic acid ≥ 40% and total organic matter ≥ 60% produced in Lingshi County, Shanxi Province;
[0141] Step 2: Coarsely crushing, fine...
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Abstract
The invention relates to a heavy metal polluted soil adsorbent and particularly relates to a sulfonated humic acid adsorption passivation repairing agent, which mainly includes the following raw materials: lignite, concentrated sulfuric acid, an oxidant, distilled water, ammonium sulfate, ammonia water and ammonium bicarbonate. The repairing agent is mainly in the type of ammonium; during a washing process, ammonia water (or an ammonium bicarbonate solution) is used for washing and neutralization, wherein conversion is completed synchronously. Compared with an original process with water washing and sodium carbonate conversion, the repairing agent can simplify the process and can recover ammonium sulfate product, thereby further reducing the manufacturing cost of the main product and can control the direct cost of a product to be about 500 yuan per ton (distance from sulfuric acid to the lignite is not more than 100 km in total).
Description
technical field [0001] The invention relates to an adsorbent for heavy metal polluted soil, in particular to a sulfonated humic acid adsorption passivation restoration agent and a production process thereof. Background technique [0002] 1. The existing heavy metal-contaminated soil adsorption technologies can be divided into two categories: removal and passivation. There are mechanical physical methods (replacing soil or calling soil), chemical methods (chemical cleaning) and biological methods (planting economic crops or super-absorbing plants to prevent heavy metals from entering the food chain) for removing heavy metals from soil, because of cost and cycle (long-term fallow is also Cost) and other issues, the removal technology cannot be applied in the soil remediation of heavy metal-contaminated cultivated land in a large area (100-200 million mu) in my country. Therefore, the heavy metal-contaminated farmland in our country can only be passivated, that is, to turn the ...
Claims
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Login to View More IPC IPC(8): C09K17/40B09C1/08C09K101/00
CPCB09C1/08C09K17/40C09K2101/00
Inventor 董坚
Owner 广东万山环境科技有限公司