吸附树脂负载锰氧化物去除水中镉和铜  

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

作　　者：鲁雪梅[1] 熊鹰[1,2] 张广之[3] 倪晋仁[1] 

机构地区：[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

出　　处：《北京大学学报（自然科学版）》2012年第6期1016-1022,共7页Acta Scientiarum Naturalium Universitatis Pekinensis

基　　金：水体污染控制与治理科技重大专项(2009ZX07212-001);深圳市科技研发资金基础研究计划(JC201105170738A);浙江省科技条件建设项目(2011F10008)资助

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。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 Cuz＋ 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 Nan coexisted at high concentration.

关 键 词：吸附树脂 锰氧化物 镉 铜 吸附 

分 类 号：X703[环境科学与工程—环境工程]