Magnetic heavy metal trapping agent and application thereof

Abstract

The invention discloses a magnetic heavy metal trapping agent and an application thereof. The magnetic heavy metal trapping agent is prepared from ferrite and a sulfydryl-containing organic compound according to a molar ratio of 1: 1-3, and the sulfydryl-containing organic compound is sodium thioglycolate. According to the invention, an in-situ synthesis method is adopted, the method comprises thefollowing steps: adding ferrite and a sulfydryl-containing organic compound into the heavy metal-containing wastewater according to a certain ratio, controlling the pH value of the mixed solution tobe 7-9, controlling a certain stirring and mixing condition so that the sulfydryl-containing composite magnetic ferrite heavy metal trapping agent is synthesized in situ and heavy metal ions in wastewater are chelated to form precipitates, solid-liquid separation and heavy metal removal can be further achieved through the action of an external magnetic field, heavy metal removal can be completed only through one-step reaction, the process is convenient and simple, the reaction conditions are mild, and the heavy metal removal rate is high.

Description

technical field [0001] The invention relates to the technical field of heavy metal-containing wastewater purification, and more specifically, to a magnetic heavy metal collector and its application. Background technique [0002] With the rapid development of the economy and the acceleration of industrialization, the pollution of heavy metal wastewater is becoming more and more serious, making it one of the most harmful industrial wastewater pollution. Especially electroplating wastewater, the pollutant composition of the wastewater is complex and highly toxic, mainly containing heavy metals such as copper, chromium, lead, etc. Direct discharge will seriously pollute the environment and endanger human health. [0003] Heavy metal trapping agent is also called heavy metal chelating agent, it can produce a strong chelation effect with most heavy metal ions, and the polymer chelate produced is insoluble in water, which can efficiently separate and remove heavy metal ions in wast...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defects and deficiencies of the existing magnetic heavy metal trapping agent, such as complex preparation process and high energy consumption, to provide a magnetic heavy metal trapping agent, which uses ferrous salt and mercapto-containing organic compound to directly inject heavy metal-containing In wastewater, by controlling certain reaction conditions (pH, proportion), the preparation of magnetic heavy metal collector and the removal of heavy metals can be completed at the same time, which simplifies the removal steps of heavy metals, and the reaction can be completed at room temperature with low energy consumption. High removal rate of heavy metals

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