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首页> 美国卫生研究院文献>Molecules >A Comparative Study on Cu2+ Zn2+ Ni2+ Fe3+ and Cr3+ Metal Ions Removal from Industrial Wastewaters by Chitosan-Based Composite Cryogels
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A Comparative Study on Cu2+ Zn2+ Ni2+ Fe3+ and Cr3+ Metal Ions Removal from Industrial Wastewaters by Chitosan-Based Composite Cryogels

机译：壳聚糖基复合冰晶去除工业废水中Cu2 +Zn2 +Ni2 +Fe3 +和Cr3 +金属离子的比较研究

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摘要

Materials coming from renewable resources have drawn recently an increased attention in various applications as an eco-friendly alternative in the synthesis of novel functional materials. Polysaccharides, with their prominent representative – chitosan (CS), are well-known for their sorption properties, being able to remove metal ions from dilute solutions either by electrostatic interactions or chelation. In this context, we proposed here a comparative study on Cu , Zn , Ni , Fe , and Cr metal ions removal from industrial wastewaters by CS-based composite cryogels using batch technique. The composite cryogels consisting of CS embedding a natural zeolite, namely clinoptilolite, were synthesized by cryogelation, and their sorption performance were compared to those of CS cryogels and of acid-activated zeolite. A deeper analysis of thermodynamics and kinetics sorption data was performed to get insights into the sorption mechanism of all metal ions onto sorbents. Based on the optimized sorption conditions, the removal of the above-mentioned ions from aqueous solutions by the composite sorbent using dynamic technique was also evaluated.
机译：来自可再生资源的材料最近在各种应用中引起了越来越多的关注，作为合成新型功能材料的一种环保替代品。多糖，以壳聚糖（CS）为代表，以其吸附性能而闻名，能够通过静电作用或螯合作用从稀溶液中去除金属离子。在此背景下，我们在此提出了一种基于CS的复合低温凝胶采用间歇技术从工业废水中去除铜，锌，镍，铁和铬金属离子的比较研究。通过冷冻凝胶法合成了由嵌入天然沸石即斜发沸石的CS组成的复合冰晶，并将其吸附性能与CS冰晶和酸活化沸石的吸附性能进行了比较。对热力学和动力学吸附数据进行了更深入的分析，以洞悉所有金属离子在吸附剂上的吸附机理。基于优化的吸附条件，还评估了使用动态技术通过复合吸附剂从水溶液中去除上述离子的能力。

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