| Simultaneous removal of arsenate and fluoride from water by AI-Fe （hydr）oxides |
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| 作者姓名： | Junlian QIAO Zimin CUI Yuankui SUN Qinghai HU Xiaohong GUAN |
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| 作者单位： | [1]State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China [2]State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China |
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| 摘 要： | A1-Fe （hydr）oxides with different A1/Fe molar ratios （4：1, 1：1, 1：4, 0：1） were prepared using a co- precipitation method and were then employed for simultaneous removal of arsenate and fluoride. The 4A1 ： Fe was superior to other adsorbents for removal of arsenate and fluoride in the pH range of 5.0-9.0. The adsorption capacity of the A1-Fe （hydr）oxides for arsenate and fluoride at pH 6.50.3 increased with increasing A1 content in the adsorbents. The linear relationship between the amount of OH released from the adsorbent and the amount of arsenate or fluoride adsorbent by 4A1 ： Fe indicated that the adsorption of arsenate and fluoride by A1- Fe （hydr）oxides was realized primarily through quantita- tive ligand exchange. Moreover, there was a very good correlation between the surface hydroxyl group densities of A1-Fe （hydr）oxides and their adsorption capacities for arsenate or fluoride. The highest adsorption capacity for arsenate and fluoride by 4A1 ： Fe is mainly ascribed to its highest surface hydroxyl group density besides its largest pHpzc. The dosage of adsorbent necessary to remove arsenate and fluoride to meet the drinking water standard was mainly determined by the presence of fluoride since fluoride was generally present in groundwater at much higher concentration than arsenate.
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| 关 键 词： | 饮用水标准 氟化物 氧化物 除砷 铁 氢 pH范围 吸附容量 |
Simultaneous removal of arsenate and fluoride from water by Al-Fe (hydr)oxides |
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| Junlian QIAO,Zimin CUI,Yuankui SUN,Qinghai HU,Xiaohong GUAN.Simultaneous removal of arsenate and fluoride from water by Al-Fe (hydr)oxides[J].Frontiers of Environmental Science & Engineering,2014,8(2):169-179. |
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| Authors: | Junlian Qiao Zimin Cui Yuankui Sun Qinghai Hu Xiaohong Guan |
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| Institution: | 1. State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
2. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China
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| Abstract: | A1-Fe （hydr）oxides, groundwater, adsorption, hydroxyl group, ligand exchange |
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| Keywords: | A1-Fe （hydr）oxides groundwater adsorption hydroxyl group ligand exchange |
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