Heavy metal ion adsorbent, preparation method and application

Abstract

The invention provides a heavy metal ion adsorbent, a preparation method and application. The heavy metal ion adsorbent is prepared by mixing, by weight, 5-10 parts of graphene@Fe3O4@MgO.SiO2 composite particles, 10-25 parts of trithiocyanuric acid trisodium salt, 5-15 parts of hydroxide and 50-80 parts of deionized water. The composite particles are prepared from nano-iron oxide, graphene, magnesium salt and sodium silicate through a coprecipitation method. According to the adsorbent, heavy metal ions can be captured in a chemical chelation mode and then enriched in a physical absorption mode, a relatively stable structure can be rapidly formed, and the metal ions can be immobilized and prevented from being released to the environment; besides, the adsorbent can be treated in a burying mode, and secondary pollution to the environment can be avoided.

Description

technical field

[0001] The invention belongs to the technical field of water purification, and in particular relates to a heavy metal ion adsorbent, a preparation method and an application. Background technique

[0002] In the field of environment and human health, heavy metals mainly refer to mercury (Hg), cadmium (Cd), lead (Pb), chromium (Cr), arsenic (As), manganese (Mn), copper (Cu), zinc (Zn), Cobalt (Co), nickel (Ni) and other heavy metals. With the development of my country's economy and society, the shortage of water resources and water pollution are becoming more and more serious. Heavy metals are one of the main pollutants in the water environment. Relevant statistics show that my country's metal wastewater accounts for about 10% of the total wastewater discharge, mainly from electroplating, circuit boards, mining, metallurgy, chemical industry and other industries, which are potentially harmful. In particular, heavy metals such as mercury, cadmium, lead, and chr...

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