壳聚糖及其衍生物脱除贝类中重金属的机理及应用研究进展

海洋重金属污染问题已成为全球关注的热点。因具有较强的重金属富集能力,水产贝类鲜食及其加工产品的重金属超标问题亟待解决。壳聚糖是天然的碱性多糖,具有很强的重金属螯合能力,蕴含量也非常丰富。文章分析壳聚糖及其衍生物用于吸附及脱除重金属的分子结构特征与吸附作用机制;综述其在牡蛎、扇贝等主要经济贝类中的相关研究及应用,强调以生物吸附剂脱除并净化贝类重金属的重要性;对贝类重金属脱除研究提出建议,并展望其应用前景。

Research progress of chitosan and its derivatives on removal of heavy metals from shellfish

Recently, the problem of heavy metal pollution has attracted many attentions in global scale. The problem of heavy metal contamination in fresh and processing shellfish products is urgently to be solved due to their strong ability of heavy metal enrichment. As the only existing natural alkaline polysaccharide, chitosan has strong ability of heavy metal chelating. In this paper, the molecular structure characteristics and adsorbent mechanism of chitosan in absorbing and removing heavy metals are analyzed. The importance of biological adsorbent on the removal of heavy metals was discussed in this paper. It was investigated of chitosan on heavy metals removal for economic shellfish products, such as oysters and scallop. Finally, considering the industry and cost requirements, suggestions for the future research on the topic of heavy metal removal from shellfish are proposed.