Removal of Cadmium and Copper from Aqueous Solution by the Adsorption Resin Coated Manganese Oxide

Acta Scientiarum Naturalium Universitatis Pekinensis

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Removal of Cadmium and Copper from Aqueous Solution by the Adsorption Resin Coated Manganese Oxide

LU Xuemei¹, XIONG Ying^1,2, ZHANG Guangzhi³, NI Jinren¹

1. Department of Environmental Engineering, Peking University, The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing 100871; 2. School of Environment and Energy, Shenzhen Graduate School, Peking University, Shenzhen Key Laboratory for Heavy Metal Pollution Control and Reutilization, Shenzhen 518055; 3. Zhejiang Institute of Hydraulics and Estuary, Hangzhou 310020;

Received:2012-02-26 Online:2012-11-20 Published:2012-11-20

吸附树脂负载锰氧化物去除水中镉和铜

鲁雪梅¹,熊鹰^1,2,张广之³,倪晋仁¹

1. 北京大学环境工程系, 水沙科学教育部重点实验室, 北京 100871; 2. 北京大学深圳研究生院环境与能源学院, 深圳市重金属污染控制与资源化重点实验室, 深圳 518005; 3. 浙江省水利河口研究院, 杭州 310020;

Abstract

Abstract: A new hybrid material (Mn-SD300) was prepared by coating manganese oxide onto the adsorption resin SD300, which adopted the method of in-suit potassium permanganate oxidation and reduction. The adsorption ability of Mn-SD300 for Cd²⁺ and Cu²⁺ was studied. The results of TEM, XRD and XPS demonstrated that the form of manganese oxide loaded on the resin was MnO₂. A good adsorption property of Cd²⁺ and Cu²⁺ onto Mn-SD300 was indicated by the batch experiments. The adsorption behavior of Cd²⁺ and Cu²⁺ on Mn-SD300 was well described by pseudo-first-order kinetic model and Langmuir isotherm model (R²>0.99), and the maximum adsorption capacity of Mn-SD300 towards Cd²⁺ and Cu²⁺, were up to 76.92 mg/g and 142.86 mg/g respectively at 303 K. Compared to the conventional cation exchange resin D001, Mn-SD300 had a better adsorption selectivity to Cd²⁺ and Cu²⁺, when Ca²⁺, Mg²⁺ and Na⁺ coexisted at high concentration.

Key words: adsorption resin, manganese oxide, cadmium, copper, adsorption

摘要： 以大孔吸附树脂SD300为载体, 采用原位高锰酸钾氧化还原法将锰氧化物负载其上, 制备了新型锰氧化物?吸附树脂复合材料Mn-SD300, 并对其吸附水中Cd²⁺和Cu²⁺的性能进行了研究。TEM, XRD以及XPS的分析结果表明, 负载的锰氧化物以MnO₂的形态存在。静态吸附实验结果表明Mn-SD300对Cd²⁺和Cu²⁺具有良好的吸附性能。吸附行为均符合准一级动力学模型(R²>0.99)和Langmuir吸附等温线模型(R²>0.99), 温度为303 K时, Mn-SD300对Cd²⁺和Cu²⁺的饱和吸附容量可分别达到76.92 mg/g和142.86 mg/g。在高浓度竞争离子Ca²⁺, Mg²⁺和Na⁺共存的情况下, Mn-SD300对Cd²⁺和Cu²⁺的吸附选择性要强于传统阳离子交换树脂D001。

关键词: 吸附树脂, 锰氧化物, 镉, 铜, 吸附

CLC Number:

X131

LU Xuemei,XIONG Ying,ZHANG Guangzhi,NI Jinren. Removal of Cadmium and Copper from Aqueous Solution by the Adsorption Resin Coated Manganese Oxide[J]. Acta Scientiarum Naturalium Universitatis Pekinensis.

鲁雪梅,熊鹰,张广之,倪晋仁. 吸附树脂负载锰氧化物去除水中镉和铜[J]. 北京大学学报（自然科学版）.

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https://xbna.pku.edu.cn/EN/Y2012/V48/I6/1016

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Removal of Cadmium and Copper from Aqueous Solution by the Adsorption Resin Coated Manganese Oxide

吸附树脂负载锰氧化物去除水中镉和铜

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