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| Effects of ion concentration and natural organic matter on arsenic(V) removal by nanofiltration under different transmembrane pressures | |
| 作者姓名： | Yang Yu Changwei Zhao Yangui Wang Weihong Fan Zhaokun Luan |
| 作者单位： | State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;School of Chemical & Environmental Engineering, China University of Mining & Technology, Beijing 100083, China;State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China;State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China |
| 基金项目： | This work was supported by the National Natural Science Foundation of China (No. 21176245, 50978245), the National Science and Technology Support Program of China (No. 2012BAJ25B02, 2012BAJ25B06), and the High Technology Research and Development Program (863) of China (No. 2009AA062901). |
| 摘 要： | The removal of As(V) from synthetic water was studied using four different nanofiltration (NF) membranes (ESNA-1-K1, NF270, ESNA-1-LF, and HODRA-CORE). The influences of ion concentration, transmembrane pressure (TMP), and the presence of natural organic matter (humic acid, HA) on the arsenic removal efficiency and permeate flux were investigated. The arsenic rejection of ESNA- 1-LF was higher than those of the other membranes in all experiments (> 94%), and the HODRA-CORE membrane gave the lowest removal of arsenic (< 47%). An increase in the ion concentration in the feed solution and addition of HA decreased the arsenic rejection of the HODRA-CORE membrane. However, both increasing of the ion concentration and addition of HA made the rejection increased for the other membranes (ESNA-1-K1, NF270, and ESNA-1-LF). With increasing TMP, for all four NF membranes, increases in both arsenic rejection and permeate flux were observed. The permeate fluxes of the four NF membranes decreased to some extent after addition of HA to the solutions for operating time of 6 hr. |
| 关 键 词： | arsenic removal nanofiltration drinking water membrane separation |
| 收稿时间： | 29 March 2012 |
| 修稿时间： | 16 September 2012 |
Effects of ion concentration and natural organic matter on arsenic(V) removal by nanofiltration under different transmembrane pressures |
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| Yang Yu,Changwei Zhao,Yangui Wang,Weihong Fan,Zhaokun Luan.Effects of ion concentration and natural organic matter on arsenic(V) removal by nanofiltration under different transmembrane pressures[J].Journal of Environmental Sciences,2013,25(2):302-307. | |
| Authors: | Yang Yu Changwei Zhao Yangui Wang Weihong Fan and Zhaokun Luan |
| Institution: | 1. State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences, Beijing 100085, China 2. State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences, Beijing 100085, China;School of Chemical(&)Environmental Engineering, China University of Mining(&)Technology, Beijing 100083, China 3. State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences, Beijing 100085, China;College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China |
| Abstract: | The removal of As(V) from synthetic water was studied using four different nanofiltration (NF) membranes (ESNA-1-K1, NF270, ESNA-1-LF, and HODRA-CORE). The influences of ion concentration, transmembrane pressure (TMP), and the presence of natural organic matter (humic acid, HA) on the arsenic removal efficiency and permeate flux were investigated. The arsenic rejection of ESNA-1-LF was higher than those of the other membranes in all experiments (>94%), and the HODRA-CORE membrane gave the lowest removal of arsenic (<47%). An increase in the ion concentration in the feed solution and addition of HA decreased the arsenic rejection of the HODRA-CORE membrane. However, both increasing of the ion concentration and addition of HA made the rejection increased for the other membranes (ESNA-1-K1, NF270, and ESNA-1-LF). With increasing TMP, for all four NF membranes, increases in both arsenic rejection and permeate flux were observed. The permeate fluxes of the four NF membranes decreased to some extent after addition of HA to the solutions for operating time of 6 hr. |
| Keywords: | arsenic removal nanofiltration drinking water membrane separation |
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