Macroporous high adsorbent resins (MHAR) are important and urgent requirements for qualified adsorbents to remove toxic heavy metals in wastewater since the short adsorption time and large adsorption capacity. Herein, a new type of MHAR was prepared by graft copolymerization of acrylic acid with sodium carboxymethyl cellulose (CMC) and sodium alginate (SA) by using N, N′-methylenebisacrylamide (MBA) as crosslinking agent, hydrogen peroxide (H₂O₂) and ascorbic acid as initiator. We characterized the morphology of the MHAR and explored the optimal conditions for MHAR to absorb water. The results showed that pH and temperature had great influences on the amount of heavy metals adsorption. The adsorption process is a linear model of multiphase multilayer molecular adsorption reaction, which belongs to the second-level kinetic model. The adsorption thermodynamic experiment showed that the adsorption of Cu²⁺ by MHAR conforms to the Freundlich adsorption isotherm. This work succeeded in preparing a MHAR that may have potential applications in environmental governance.

中文翻译：

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大孔高吸附树脂的制备及其在重金属离子去除中的应用

大孔高吸附树脂(MHAR)具有吸附时间短、吸附容量大等优点，是去除废水中有毒重金属的合格吸附剂的重要而迫切的需求。以N , N'-亚甲基双丙烯酰胺（MBA）为交联剂，过氧化氢（H ₂ O ₂) 和抗坏血酸作为引发剂。我们表征了 MHAR 的形态并探索了 MHAR 吸水的最佳条件。结果表明，pH和温度对重金属吸附量影响较大。吸附过程是多相多层分子吸附反应的线性模型，属于二级动力学模型。吸附热力学实验表明，MHAR对Cu ²⁺的吸附符合Freundlich吸附等温线。这项工作成功地准备了可能在环境治理中具有潜在应用的 MHAR。