农业废弃物吸附水中重金属离子研究进展

Research Progress on Adsorption of Heavy Metal Ions in Water by Agricultural Wastes

摘要: 重金属在环境中难以降解性，因此水体中重金属的修复具有重要意义，传统的水处理技术较为昂贵，并且产生了大量的重金属有毒化学污泥。生物吸附是一种潜在的替代现有的传统技术，与传统处理方法相比，生物吸附的主要优点是低成本、高效率、化学或生物污泥少、生物吸附剂再生和金属回收等优点。纤维素农业废弃物是重要的金属生物吸附剂来源，生物吸附过程包括化学吸附、络合作用、物理吸附。本文综述目前农业废弃物吸附重金属的机理与研究进展，农业废弃物高效、低成本、可再生的生物质资源可用于重金属污染修复。

Abstract: Heavy metals are difficult to degrade in the environment, so the remediation of heavy metals in water is of great significance. The traditional water treatment technology is more expensive, and a large number of heavy metal toxic chemical sludge are produced. Biosorption is a potential alter-native to the existing traditional technology. Compared with the traditional treatment methods, the main advantages of biosorption are low cost, high efficiency, less chemical or biological sludge, biosorbent regeneration and metal recovery. Cellulose agricultural waste is an important source of metal biosorbents. The biosorption process includes chemical adsorption, complexation and physical adsorption. In this paper, the mechanism and research progress of heavy metal adsorption by agricultural waste are reviewed. The biomass resources with high efficiency, low cost and renewable can be used for heavy metal pollution remediation.