Authors: SheJiang Liu Jie Li YongKui Yang Juan Wang Hui Ding
Publish Date: 2015/10/01
Volume: 23, Issue: 3, Pages: 2487-2494
Abstract
Lanthanummodified bentonite has potential for wide application in eutrophication control We investigated P adsorption on a lanthanummodified bentonite by analysis of adsorption kinetics equilibrium and the effect of environmental factors P adsorption closely followed the pseudosecondorder kinetic model and the isotherm was well described by the Langmuir model This adsorbent could effectively immobilize P into the sediment but the adsorption process was strongly dependent on pH anions and low molecular weight organic acids LMWOAs P adsorption increased with increasing pH from 052 mg P/g at pH 30 to 093 mg P/g at pH 70 with no adsorption at pH 11 P adsorption was strongly inhibited in the presence of anions and three LMWOAs with P even rereleased at high concentrations These environmental factors should be given significant attention when considering the application of lanthanummodified bentonite in eutrophication control
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