Remove of Heavy Metals(Cu2+, Pb2+, Zn2+ and Cd2+) in Water Through Modified Diatomite

doi:10.1007/s40242-013-2504-1

Abstract

Abstract:

At present, heavy metal pollution has become a major environmental problem, influencing the survival of human and other creatures. Developing heavy metal ion adsorbents, which are environment friendly, of low cost and good performance is one of the effective means to solve heavy metal pollution. Rich low-grade diatomite mineral, as raw material, was modified with calcium carbonate to improve the adsorption properties of diatomite for heavy metal ions. The effects of dosage(m), pH, adsorbing time(t), temperature(T) and concentration of adsorbent(c) on the removal rate of heavy metal ions(Cu²⁺, Pb²⁺, Zn²⁺ and Cd²⁺) were studied. The results show that under the suitable conditions, T=15 ℃, c=1.5 mmol/L, m=10 g/L, t=60 min, in a weak acid environment, the removal effect of the four kinds of metal ions by modified diatomite is the best.

Key words: Diatomite, Heavy metal, Modification, Adsorption

LIU Jia, WANG Hong-liang, LÜ Chun-xin, LIU Han-fei, GUO Zhi-xin, KANG Chun-li. Remove of Heavy Metals(Cu²⁺, Pb²⁺, Zn²⁺ and Cd²⁺) in Water Through Modified Diatomite[J]. Chemical Research in Chinese Universities, 2013, 29(3): 445-448.

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Remove of Heavy Metals(Cu²⁺, Pb²⁺, Zn²⁺ and Cd²⁺) in Water Through Modified Diatomite

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