Method for establishing biomass-based double aqueous phases and purifying harmful substances in salt solution

Abstract

The invention belongs to the technical field of environmental governance and resource recycling, and provides a method for establishing a biomass-based double aqueous phases and purifying harmful substances in a salt solution. By adopting harmful substances in high saline water as a study object and for the problems that the extraction agent in the traditional double aqueous phases is expensive, the toxicity is high and the like, a rich biomass resource is used for providing a method adopting biological gel as an extraction agent to establish a novel double aqueous phase with salt-containing waste water so as to extract harmful substances in the salt water, and salts can be recycled. A purification method can adopt a rapidly mixing method, i.e., the salt concentration of the salt-containing waste water is controlled at certain concentration, a given amount of polymer is mixed with the salt water, and after the mixed solution stands, a two-phase system can be formed; and to separate anupper phase is to adopt the biological colloid as the extraction agent to extract the harmful substances in the high saline water such as heavy metal ions, environmental hormones and the like, a lowerphase is mainly a purified saline solution, and after the separation, the purification of the heavy metal ions, the concentrate recycling of the environmental hormones and the comprehensive utilization of waste resources can be realized.

Description

Technical field [0001] The invention belongs to the technical field of environmental treatment and resource recovery, and specifically relates to a method for constructing a biomass-based two-phase water phase and purifying harmful substances in a salt solution. Background technique [0002] The high salt water system mainly comes from mechanical processing, electroplating, mining, metallurgy, chemical and other departments, specifically from mine drainage, waste rock leaching, concentrator tailings drainage, non-ferrous metal smelter production drainage, and non-ferrous metal processing plant pickling water , Electroplating plant plating parts washing water, steel plant pickling drainage, and electrolysis, pesticides, medicine, paint, pigments and other industrial wastewater. Characteristics of high-salt water systems Although the content of heavy metals and other impurities in the water body is very low and generally does not cause harm to human health, the quality of the produ...

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Problems solved by technology

There are mainly the following types: (1) Chemical method: it is economical and convenient, and the source of the agent is wide, but after the metal ion reacts with the agent, it is easy to deposit and large in size, difficult to dehydrate, easy to cause "secondary pollution", and the post-processing cost is high

(2) Adsorption method: The operation is simple and convenient, and the adsorption effect on low-concentration metal ions is good, but the adsorption capacity on high-concentration solutions is limited, and regeneration is difficult

(3) Ion exchange method: The adsorption is relatively thorough, but the type of exchange resin commonly used affects the type of adsorbed ions, and the exchange resin is expensive, and it is too difficult to regenerate and utilize it. For industrial production, the investment is too large

(5) Biological treatment method: According to the various polysaccharides secreted by bacteria during the growth process, they chelate with metal ions to achieve the purpose of enrichment, but the growth process is relatively long, and the treatment cycle is also long, and artificial The addition of nutrients is not suitable for rapid and effective treatment of high-salinity systems

However, the polymers used in the two-phase aqueous metal ion extraction research at home and abroad are all organic polymers, which have certain chemical toxicity, and the extraction agent is expensive, which is not suitable for large-scale industrial production, and has become the main source of no practical application. reason

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