Abstract

In this study, cross-linked microspheres formed by interpenetrating networks of carboxymethyl cellulose and polyacrylic acid were prepared via inverse-suspension polymerization. The resultant has high adsorption capacity for rare earth ions, can reach 313 mg/g for Ce³⁺ under the condition of pH 6 at normal temperature. Unique self-creep characteristic gives it a fast-speed adsorption performance, which makes it to reach adsorption equilibrium within 70 min. It also has good reuse performance; its adsorption capacity decrease rate is only 21% after six adsorption–desorption cycles. Adsorption kinetics and thermodynamic studies and adsorption isothermal analysis were researched as well. The research conclusion suggested that this adsorbent is a promising adsorbent for recovering the rare earth ions from wastewater containing rare earth. And all related experiments show that ISP method is effective for making spherical macromolecular adsorbents via water-soluble monomers.

中文翻译：

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反相悬浮制备羧甲基纤维素和聚丙烯酸自蠕变凝胶微球用于从水溶液中回收稀土离子

摘要

在这项研究中，通过逆悬浮聚合制备了由羧甲基纤维素和聚丙烯酸互穿网络形成的交联微球。生成物对稀土离子具有高吸附能力，对Ce ^3+的吸附量可达到313 mg / g在常温下pH为6的条件下。独特的自蠕变特性使其具有快速吸附性能，使其在70分钟内达到吸附平衡。它还具有良好的重用性能；经过六个吸附-解吸循环，其吸附能力下降率仅为21％。还研究了吸附动力学和热力学研究以及吸附等温分析。研究结论表明，这种吸附剂是一种从含稀土废水中回收稀土离子的有前途的吸附剂。所有相关实验表明，ISP法可通过水溶性单体制备球形大分子吸附剂。