湖泊水体中植物残体对重金属的吸附性能研究
摘 要
Cu2 是一类典型的重金属污染物，在我国城市化和工业化进程不断加快的情况下，冶金、石油化工等行业产生大量的含铜废水，不仅对水体危害甚大，而且往往会通过食物链而富集，严重危害环境安全和人体健康。利用水生植物吸附作用在去除水中Cu2 等重金属污染物中具有巨大的应用潜力。寻找最佳的吸附条件，探究其吸附重金属的影响因素成为研究热点，现更多关注微生物条件下的降解情况较多，而对紫外光条件下的研究较少，对水生植物体对重金属吸附能力研究较多，对植物残体对重金属吸附性能研究较少。为此，本文在水生植物吸附重金属研究进展的基础上，选择马来眼子菜作为水生植物残体代表，选取单紫外光、单微生物、紫外 微生物三种降解条件，通过比较吸附前后植物残体的各项指标，研究三种条件降解下对Cu2 的吸附性能，对水体湖泊修复提供理论依据。
关键词：植物残体；紫外光；微生物；重金属
Adsorption of heavy metals by plant residues
in lake water
ABSTRACT
Cu2 is a kind of typical heavy metal pollutants. With the rapid development of urbanization and industrialization in China, a large amount of copper containing wastewater is produced in metallurgy, petrochemical and other industries, which not only does great harm to water, but also accumulates through the food chain, seriously endangering environmental safety and human health. It has great potential to remove Cu2 and other heavy metal pollutants in water by using the adsorption of aquatic plants. Looking for the best adsorption conditions and exploring the influencing factors of heavy metal adsorption has become a research hotspot. At present, more attention is paid to the degradation of heavy metals under microbial conditions, while less attention is paid to the research under ultraviolet light, more attention is paid to the adsorption capacity of aquatic plants for heavy metals, and less attention is paid to the adsorption performance of plant residues for heavy metals. Therefore, on the basis of the research progress of heavy metal adsorption by aquatic plants, Potamogeton malayi was selected as the representative of aquatic plant residues, and three degradation conditions of single UV, single microorganism and UV microorganism were selected. By comparing the indicators of plant residues before and after adsorption, the adsorption performance of Cu2 under the three degradation conditions was studied, which provided theoretical basis for water and lake remediation.
Key words: plant residues; ultraviolet; microorganism; heavy metal
