Pb and Cd binding to natural freshwater biofilms developed at different pH: the important role of culture pH.

Environmental Science and Pollution Research International
Xiuyi HuaZhiyong Guo

Abstract

The effects of solution pH on adsorption of trace metals to different types of natural aquatic solid materials have been studied extensively, but few studies have been carried out to investigate the effect of pH at which the solid materials were formed on the adsorption. The purpose of present study is to examine this effect of culture pH on metal adsorption to natural freshwater biofilms. The adsorption of Pb and Cd to biofilms which were developed at different culture pH values (ranging from 6.5 to 9.0) was measured at the same adsorption pH value (6.5). The culture pH had considerable effects on both composition and metal adsorption ability of the biofilms. Higher culture pH usually promoted the accumulation of organic material and Fe oxides in the biofilms. The culture pH also affected the quantity and species of algae in the biofilms. The adsorption of Pb and Cd to the biofilms generally increased with the increase of culture pH. This increase was minor at lower pH range and significant at higher pH range and was more remarkable for Cd adsorption than for Pb adsorption. The notable contribution of organic material to the adsorption at higher culture pH values was also observed. The profound impacts of culture pH on adsorpt...Continue Reading

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Citations

Jun 5, 2012·Environmental Science and Pollution Research International·Xiuyi HuaDapeng Liang
Jul 6, 2014·Journal of Applied Microbiology·V F BondiciD R Korber
Aug 30, 2018·Environmental Science and Pollution Research International·Xiuyi HuaZhiyong Guo
Sep 27, 2018·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Xiaoying ChengJiaqi Luo
May 15, 2018·Environmental Science and Pollution Research International·Xiuyi HuaZhiyong Guo

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