Preparation and application method of heavy metal sludge stabilizer

Abstract

The invention relates to a preparation and application method of a heavy metal sludge stabilizer. The preparation and application method of the heavy metal sludge stabilizer belongs to the technical field of dangerous waste treatment, and comprises the following steps of (1) a preparation method: according to the mass percent, preparing 10 to 50 percent of aggregate, 5 to 40 percent of precipitator, and 1 to 10 percent of additive; (2) an application method: stirring heavy metal sludge and water into slurry, meanwhile, using inorganic acid or inorganic base for adjusting pH of the slurry, adding 5 percent to 20 percent of stabilizer of the step (1), uniformly stirring, then adding a curing agent, and detecting after maintaining. According to the method provided by the invention, the preparation of the stabilizer and the treatment of the sludge are operated at normal temperature and normal pressure, the process is simple, a solidified body leaching agent meets a dangerous waste landfilling admission standard (GB 18598-2001), and an operation effect is stable; the aggregate of the stabilizer is industrial solid waste, the waste is used for treating the waste, the cost is low, and the aims of minimization, reclamation and harmlessness of the dangerous waste treatment are truly achieved.

Description

technical field [0001] The invention belongs to the technical field of harmless treatment of hazardous waste, and in particular relates to a treatment method and application of heavy metal sludge. Background technique [0002] Heavy metal pollution mainly comes from industrial pollution, especially during mineral mining, smelting, and processing. Lead storage battery industry, leather and its products industry, chemical raw material and chemical product manufacturing industry, etc. The prevention and control areas are mainly Inner Mongolia, Jiangsu, Zhejiang, Jiangxi, Henan, Hubei, Hunan, Guangdong, Guangxi, Sichuan, Yunnan, Shaanxi, Gansu, Qinghai 14 other provinces. Heavy metal pollution has a wide range, long duration, strong pollution concealment, non-biodegradable but accumulative, and can be continuously enriched in organisms through the food chain, and can even be converted into more toxic methyl compounds, which have a great impact on the food chain. Some organisms...

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Problems solved by technology

[0004] Patent CN106587550A discloses a high-efficiency heavy metal sludge treatment agent, which mixes glutamine, sodium bentonite, methylparaben, biogas residue, edible fungus leftovers and bentonite, and then extrudes them into particles with a diameter of 2 mm. The particles are mixed evenly with activated carbon, polydimethyldiallyl ammonium chloride, p-chloromethylbenzoic acid, 2-aminopyridine-4-methanol, and ferrous sulfate, and then treated with ultrasonic oscillation. The power of ultrasonic oscillation is 300-600W, the time is 50-60 minutes, put it at a temperature of 4°C and dry it at a low temperature for granulation to obtain a high-efficiency heavy metal sludge treatment agent. This method is complicated in process and high in treatment cost

Patent CN105503097A discloses a solidifying agent for treating electroplating sludge and its preparation method and application method, with cement 75%~79%, sand 10%~15%, sodium silicate 5%~8%, activated alumina 6%~ 10%, the mass ratio of curing agent to sludge is 1: (0.6~1), stir and mix evenly, granulate, and keep at room temperature for 2~4 days. This method has a large amount of agent added and a large volume increase ratio of the solidified body. , not conducive to the realization of industrialized disposal