Treatment agent for coupling treatment of various heavy metal ions in electroplating wastewater

Abstract

The invention discloses a treatment agent for coupling treatment of various heavy metal ions in electroplating wastewater. The treatment agent includes olive pomace, olive sawdust, nitrohumic acid resin, ethoxylated polyethyleneimine, biochar, cetylpyridinium chloride, starch xanthate, sodium polyacrylate, a crosslinker, thiacalixarenetetrasulfonate, polyoxyethylene octylphenyl ether, modified sericin, polyaspartic acid, beta-cyclodextrin, an organic polymeric coagulant, a promoter and poly(diallylammonium chloride acrylamide)-based sodium dithiocarbamate. Complexation, flocculation, trapping,precipitation and adsorption methods are used to perform synergistic coupling treatment on heavy metal wastewater, so the antagonistic or competitive effects among the various ions are overcome, theadvantages of all the treatment methods are fully exerted, and the conversion of heavy metals from a high bioavailable state to a low bioavailable state is promoted, thereby the effectiveness and themigration activity of heavy metals in water are reduced; and the treatment agent effectively inhibits the enrichment and transport of heavy metals by crops and reduces the toxicity of the heavy metals.

Description

technical field [0001] The invention is designed in the field of wastewater treatment, and in particular relates to a treatment agent for coupling treatment of various heavy metal ions in electroplating wastewater. Background technique [0002] Heavy metal wastewater mainly comes from mining, non-ferrous metal smelting, machining, electroplating, etc. Most of them contain heavy metal elements such as lead, zinc, chromium, arsenic, cadmium, nickel, copper, etc., which seriously pollute the environment. In addition, due to the high solubility of heavy metal ions in water, they are easily absorbed by organisms, thus enter the food chain, and eventually accumulate in the human body. When accumulated to a certain extent, they will cause great harm to human health. Existing technologies are generally divided into chemical methods, physical chemical methods and biological methods. Among them, the chemical method has a simple process and is easy to operate, but there are many probl...

AI Technical Summary

Problems solved by technology

Among them, the chemical method is simple in process and easy to operate, but there are many problems such as high metal concentration in the effluent, large amount of waste residue, easy to produce secondary pollution, and difficult to reuse wastewater.

Physical and chemical methods mainly include coagulation method, adsorption method and membrane treatment technology, etc. Adsorption method has high removal efficiency and simple operation, but the price of adsorbent is high and regeneration efficiency is low; coagulation method uses aluminum salt or iron salt as coagulant, It may cause secondary pollution; the membrane treatment method can recover useful substances while treating wastewater, but there are problems such as easy fouling of the membrane and short service life

Biological treatment of heavy metal wastewater has no secondary pollution, easy management, low cost, high benefit, and has broad application prospects. However, there are problems such as low toxicity of bacteria and microorganisms resistant to heavy metals, and difficulty in storage. They are generally in the laboratory research stage.

In order to meet the increasingly stringent environmental protection requirements and achieve wastewater reuse and heavy metal recovery at the same time, it is difficult for a single treatment technology to meet the development needs of the industry

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