| Nano-HCO吸附剂的制备及其除As(Ⅲ)性能 |
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| 引用本文： | 李秋蓉,欧阳通,张萍,种珊. Nano-HCO吸附剂的制备及其除As(Ⅲ)性能[J]. 华侨大学学报(自然科学版), 2009, 30(6) |
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| 作者姓名： | 李秋蓉 欧阳通 张萍 种珊 |
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| 作者单位： | 厦门大学,海洋与环境学院,福建,厦门361005;厦门大学,海洋与环境学院,福建,厦门361005;厦门大学,海洋与环境学院,福建,厦门361005;厦门大学,海洋与环境学院,福建,厦门361005 |
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| 基金项目： | 福建省自然科学基金计划资助项目(D0510005);;厦门市科技计划项目(3502Z20083001) |
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| 摘 要： | 采用溶胶沉淀结合超声分散处理的方法,制备平均粒径为70 nm,比表面积为212 m2.g-1的纳米级水合氧化铈(Nano-HCO)吸附剂.在pH值为4~10,初始As(Ⅲ)质量浓度为10 mg.L-1,吸附剂投加量为1.0 g.L-1的反应条件下,可在2 h内将溶液中As(Ⅲ)质量浓度降低到0.01 mg.L-1以下.Nano-HCO吸附剂对砷的吸附等温线服从Langmuir方程,对应不同pH值,其对As(Ⅲ)的吸附容量较未经超声分散处理的水合氧化铈提高29%~141%,且水温的升高有助于增加As(Ⅲ)的吸附程度.
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| 关 键 词： | 纳米级水合氧化铈 As(Ⅲ) 地热水 吸附等温线 |
Preparation of Nano-Hydrous Ceric Oxide and Its Adsorption Characteristics of Arsenite |
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| LI Qiu-rong,OUYANG Tong,ZHANG Ping,CHONG Shan. Preparation of Nano-Hydrous Ceric Oxide and Its Adsorption Characteristics of Arsenite[J]. Journal of Huaqiao University(Natural Science), 2009, 30(6) |
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| Authors: | LI Qiu-rong OUYANG Tong ZHANG Ping CHONG Shan |
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| Affiliation: | College of Oceanography and Environmental Science;Xiamen University;Xiamen 361005;China |
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| Abstract: | Nano-sized hydrous ceric oxide (Nano-HCO) with an average diameter size of 70 ran and specific surface area 212 m~2·g~(-1) were prepared using sol-precipitation method in conjunction with ultrasonic dispersion.At an initial As(Ⅲ ) concentration of 10 mg·L~(-1),solution pH range 4~10,adsorbent dose of 1.0 g·L~(-1),a final concentration of As( Ⅲ ) could be decreased below 0.01 mg·L~(-1),within 2 h.The isotherms fit well in the Langmuir model of adsorption,and with the studied pH conditions,the adsorption capacity of As(Ⅲ) on Nano-HCO was increased by 29% to 141% compared with the HCO samples prepared without ultrasonic dispersion treatment.The extent of As(Ⅲ) adsorption was enhanced by increasing ambient temperature. |
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| Keywords: | nano-sized hydrous eerie oxide As(Ⅲ) geothermal water adsorption isotherm |
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