Adsorption of Iron and Lead Ions from an Aqueous Solution by Plasma-Modified Activated Carbon

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• 作者：ChangMing Du ; Hui Liu ; MuDan Xiao ; Dong Gao ; DongWei Huang ; ZhiYi Li ; TengFei Chen ; JianMin Mo ; Kui Wang ; ChuangRong Zhang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2012
• 出版时间：December 5, 2012
• 年：2012
• 卷：51
• 期：48
• 页码：15618-15625
• 全文大小：405K
• 年卷期：v.51,no.48(December 5, 2012)
• ISSN：1520-5045

文摘

The adsorption properties of gliding arc discharge (GAD) plasma-modified granular activated carbon (AC) were studied with Pb²⁺, Fe²⁺, Ni²⁺, and Cu²⁺ solutions selected as components of the target wastewater. The physical and chemical properties of the surface of modified AC were monitored by scanning electron microscopy, elemental analysis, and automatic surface area and pore size analysis. The adsorbance of metal ions was measured by inductively coupled plasma optical emission spectrometry. The adsorbance of Fe²⁺ and Pb²⁺ increased with GAD modification time, whereas the adsorbance of Ni²⁺ and Cu²⁺ barely changed over time. The optimum modification time and gas flow rate were found to be 30 min and 0.9 L/min, respectively. The adsorption mode of Pb²⁺ or Fe²⁺ by AC with a modification time of 30 min was monolayer adsorption. The adsorption kinetics of Fe²⁺ and Pb²⁺ on AC can be better described by a pseudo-first-order kinetic model.