Journal Title
Title of Journal: J IRAN CHEM SOC
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Abbravation: Journal of the Iranian Chemical Society
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Publisher
Springer Berlin Heidelberg
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Authors: Shuhua Yao Ziru Liu Zhongliang Shi
Publish Date: 2014/02/14
Volume: 11, Issue: 6, Pages: 1545-1551
Abstract
Batch experiments were conducted to study the adsorption behavior of cadmium ion onto the synthetic ferrihydrite The adsorbent was characterized using Xray diffraction and N2 adsorption–desorption measurements The effects of pH value and the major seawater anions nitrate carbonate chloride and sulphate at their natural concentrations on the adsorption of cadmium ion were investigated The results showed that the adsorption of cadmium ion was highly pHdependent and suppressed in the presence of chloride sulphate and nitrate while carbonate was found to enhance the adsorption of cadmium ion over the examined range of 40–75 The maximum percentage of cadmium ion adsorbed can reach 8996 at pH 75 It is proposed that the competition for binding sites played a key role in the reduction of cadmium ion adsorption by nitrate chloride and sulphate Xray diffraction spectroscopic data for cadmium adsorbed on ferrihydrite showed that CdCO3s was formed on ferrihydrite the formation of CdCO3 precipitation or surface precipitation in carbonate system may be the reason for the increase of cadmium adsorption
Keywords:
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