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| 无定型纳米TiO2吸附去除饮用水中的低浓度As(Ⅲ) | |
| 引用本文： | 唐玉朝,李新,伍昌年,张海平,黄显怀,汤利华.无定型纳米TiO2吸附去除饮用水中的低浓度As(Ⅲ)[J].环境工程学报,2013,7(1):47-52. |
| 作者姓名： | 唐玉朝 李新 伍昌年 张海平 黄显怀 汤利华 |
| 作者单位： | 1. 安徽建筑工业学院环境工程系水污染控制与废水资源化实验室,合肥,230022 2. 安徽建筑工业学院环境工程系水污染控制与废水资源化实验室,合肥230022;中国科学技术大学化学与材料科学学院,合肥230026 3. 南京大学环境学院,南京,210093 |
| 基金项目： | 国家自然科学基金资助项目(50908001); 安徽省优秀青年科技基金(10040606Y29); 安徽省重大科技专项(08010301106); 安徽省国际科技合作项目(09080703035) |
| 摘 要： | 研究了纳米无定型TiO2颗粒对饮用水中低浓度的三价砷As(Ⅲ)吸附行为。纳米TiO2颗粒吸附剂的BET表面积为205 m2/g,计算的BJH吸附平均孔径为4.02 nm(4 V/A)。对起始As(Ⅲ)浓度为150μg/L的模拟含砷水,经过5h的吸附处理后残余浓度不足4μg/L,As(Ⅲ)去除率达到97%。反应起始阶段吸附速率较快,84%的As(Ⅲ)能够在20min内去除。As(Ⅲ)吸附动力学较好地符合拟二级动力学模式。最佳As(Ⅲ)吸附pH为9.3,低于此值,随酸性增加吸附速率有所降低;而高于此值的强碱性pH对吸附有强烈抑制作用。在平衡浓度较低的情形下(10～220μg/L),Lang-muir,Freundlich和Dubinin-Radushkevich(D-R)吸附等温式均可较好拟合吸附行为,但中性和弱碱性条件下更符合Fre-undlich吸附等温式;平衡浓度大于220μg/L,吸附容量随平衡浓度增加而迅速增加,最大吸附容量在低浓度下达到4.79 mg/g。 |
| 关 键 词： | 低浓度As(Ⅲ) 饮用水 吸附 无定型TiO2 |
As(Ⅲ) removal from low-arsenic concentration drinking water by adsorption with nanoparticle amorphous titanium dioxide |
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| Tang Yuchao,Li Xin,Wu Changnian,Zhang Haiping,Huang Xianhuai and Tang Lihua.As(Ⅲ) removal from low-arsenic concentration drinking water by adsorption with nanoparticle amorphous titanium dioxide[J].Techniques and Equipment for Environmental Pollution Control,2013,7(1):47-52. | |
| Authors: | Tang Yuchao Li Xin Wu Changnian Zhang Haiping Huang Xianhuai and Tang Lihua |
| Institution: | 1. Laboratory of Water Pollution Control and Wastewater Reuse, Department of Environmental Engineering, Anhui University of Architecture, Hefei 230022, China;1. Laboratory of Water Pollution Control and Wastewater Reuse, Department of Environmental Engineering, Anhui University of Architecture, Hefei 230022, China;1. Laboratory of Water Pollution Control and Wastewater Reuse, Department of Environmental Engineering, Anhui University of Architecture, Hefei 230022, China;2. School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China;3. School of Environment, Nanjing University, Nanjing 210093, China;1. Laboratory of Water Pollution Control and Wastewater Reuse, Department of Environmental Engineering, Anhui University of Architecture, Hefei 230022, China;1. Laboratory of Water Pollution Control and Wastewater Reuse, Department of Environmental Engineering, Anhui University of Architecture, Hefei 230022, China;2. School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China |
| Abstract: | |
| Keywords: | arsenic amorphous titanium dioxide adsorption drinking water |
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