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ZnxCa(2-x)-Fe吸附剂的制备及其除磷机制

王镜渊 汪国庆 叶 春 李春华 代 强 姜 宏

王镜渊, 汪国庆, 叶 春, 李春华, 代 强, 姜 宏. ZnxCa(2-x)-Fe吸附剂的制备及其除磷机制[J]. 环境科学研究, 2015, 28(7): 1145-1151.
引用本文: 王镜渊, 汪国庆, 叶 春, 李春华, 代 强, 姜 宏. ZnxCa(2-x)-Fe吸附剂的制备及其除磷机制[J]. 环境科学研究, 2015, 28(7): 1145-1151.
WANG Jingyuan, WANG Guoqing, YE Chun, LI Chunhua, DAI Qiang, JIANG Hong. Preparation of ZnxCa(2-x)-Fe Adsorbent and Mechanisms of Phosphate Adsorption[J]. Research of Environmental Sciences, 2015, 28(7): 1145-1151.
Citation: WANG Jingyuan, WANG Guoqing, YE Chun, LI Chunhua, DAI Qiang, JIANG Hong. Preparation of ZnxCa(2-x)-Fe Adsorbent and Mechanisms of Phosphate Adsorption[J]. Research of Environmental Sciences, 2015, 28(7): 1145-1151.

ZnxCa(2-x)-Fe吸附剂的制备及其除磷机制

基金项目: 国家水体污染控制与治理科技重大专项(2012ZX0701-009);海南大学地方服务项目(HDSF201308);海南省重大科技项目(ZDZX2013002)

Preparation of ZnxCa(2-x)-Fe Adsorbent and Mechanisms of Phosphate Adsorption

  • 摘要: 为研究ZnxCa(2-x)-Fe系LDHs(层状双金属氢氧化物)对P的吸附去除特性,在室温下采用化学共沉淀法制备一系列不同配比的ZnxCa(2-x)-Fe系LDHs,通过XRD(X射线衍射)、FTIR(傅里叶变换红外光谱)、Zeta电位测试对吸附剂的微观结构和表面电荷进行分析,采用静态吸附试验考察了投加量、接触时间及溶液初始pH对ZnxCa(2-x)-Fe系LDHs除P性能的影响. 结果表明:ZnxCa(2-x)-Fe系LDHs与含P水接触4 h后,达到吸附平衡;其中0~1 h为快速吸附阶段,之后为缓慢吸附阶段,吸附过程符合准二级动力学方程. Ca2.0-Fe、Zn2.0-Fe对P的吸附符合Langmuir等温吸附模型,经计算所得理论最大吸附量分别为228.31和95.23 mg/g. 结合Zeta电位与FTIR的测试结果,推测ZnxCa(2-x)-Fe系LDHs主要通过静电吸引、离子交换、配位交换及化学沉淀的协同作用实现水中P的去除. ZnxCa(2-x)-Fe系LDHs的饱和吸附量均高于同类吸附剂,能有效去除自然水体和市政污水中的P.

     

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  • 刊出日期:  2015-07-25

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