Heavy metal polluted wastewater treatment agent, and preparation method and application thereof

Abstract

The invention provides a heavy metal polluted wastewater treatment agent. The heavy metal polluted wastewater treatment agent contains sodium dithiocarbamate modified corn peptide. The preparation method of the sodium dithiocarbamate modified corn peptide comprises the following step: enabling corn peptide to react with CS2 and NaOH to generate the sodium dithiocarbamate modified corn peptide. Theheavy metal wastewater treatment agent provided by the invention solves the problems of high heavy metal wastewater treatment difficulty, high treatment cost and complicated actual operation, and iswide in raw material source, low in price, convenient to use and low in treatment cost.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a heavy metal-polluted wastewater treatment agent and its preparation method and application. Background technique [0002] As early as the early 1950s, the environmental pollution of heavy metals has attracted widespread attention from all over the world. Especially the "Minamata disease" caused by mercury pollution in Japan and the "bone pain disease" caused by cadmium pollution, as well as the Some European countries have successively discovered the serious consequences of heavy metal pollution, making the research on heavy metal pollution and its prevention and control more important. Heavy metal waste comes from a wide range of industries, involving mining, metallurgy, machinery manufacturing, chemical industry, electronics, and instrumentation. On the other hand, with With the in-depth study of heavy metal toxicology and the development of detection technology,...

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Problems solved by technology

[0003] The purpose of the present invention is to propose a heavy metal polluted wastewater treatment agent and its preparation method and application. The corn peptide modified by sodium dithiocarbamate is a modified corn peptide with a sodium dithiocarbamate group. There are many kinds of polymer compounds that can chelate heavy metals, such as amino groups, hydroxyl groups, sulfhydryl groups, and dithiocarbamate groups. Therefore, corn peptides modified with sodium dithiocarbamate The chelation site of corn peptide and metal is increased, so that it can chelate most heavy metal ions, including copper ions, lead ions, nickel ions, zinc ions, ferrous ions, iron ions, cadmium ions, chromium ions, etc. On the one hand, the corn peptide modified by sodium dithiocarbamate has a large molecular weight, and the precipitated flocs generated after chelating with heavy metals are large and have good settling performance, and it also has a certain flocculation effect. Compound use solves the problem of low utilization efficiency of the chelating group of the polymer chelating agent, and also solves the problem of difficult flocculation caused by the simple use of small molecular chelating agents, and the problem that the chelated molecules are still suspended in the system and difficult to precipitate; On the other hand, corn peptide modified by sodium dithiocarbamate and disodium EDTA are both water-soluble chelating agents, which are more environmentally friendly

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