氧化锆改性高岭土对F~-的吸附研究

发布时间：2018-04-16 10:03

  本文选题：高岭土 + 氧化锆　； 参考：《离子交换与吸附》2016年06期

【摘要】：合成了氧化锆负载改性的高岭土吸附剂,并研究了其对水中F~-的吸附行为。通过XRD和FT-IR对改性前后的高岭土进行表征,结果表明,负载的氧化锆不影响高岭土晶型和骨架结构。吸附实验结果表明,氧化锆改性后的高岭土对F~-有很高的去除效率,其吸附机理包括离子交换和静电作用力,吸附等温线符合Freundlich等温吸附模式,吸附动力学可用拟二级动力学模型拟合。吸附量随着溶液pH值的升高而降低,共存阴离子能抑制F~-在氧化锆负载的高岭土上的吸附。
[Abstract]:A modified kaolin adsorbent supported on zirconia was synthesized and its adsorption behavior for F- in water was studied.The modified kaolin was characterized by XRD and FT-IR. The results showed that the loaded zirconia did not affect the crystal form and skeleton structure of kaolin.The adsorption results show that the modified kaolin has a high removal efficiency of F-, the adsorption mechanism includes ion exchange and electrostatic force, and the adsorption isotherm accords with the Freundlich isotherm model.The adsorption kinetics can be fitted by the pseudo-second-order kinetic model.The amount of adsorption decreases with the increase of pH value of the solution and coexisting anions can inhibit the adsorption of F- on zirconia supported kaolin.
【作者单位】： 南京晓庄学院环境科学学院;
【基金】：江苏省高校自然科学基金面上项目(No.15KJB610010) 中国博士后科学基金(No.2015M571832) 2015年江苏省高等学校大学生创新创业训练计划重点项目(No.2893)
【分类号】：O647.3
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本文编号：1758393