化学法抑制内源磷释放工程应用及研究进展

Chemical Methods for Inhibiting Release of Endogenous Phosphorus:Engineering Application and Research Progress

水体富营养化导致的蓝藻暴发、水体浑浊、水质变差已成为一个全球性的问题。在切断外源负荷的情况下,抑制内源磷释放成为降低水体磷负荷和抑制水体富营养化的关键。与异位处理技术相比,原位化学钝化由于操作简便、成本低、对生态影响小而备受关注。常用的化学试剂大致可以分为4类:钙盐、铁盐、铝盐和镧修饰膨润土,文章综述了各类化学试剂在国内外工程化应用和研究进展,并对未来发展提出展望,以期为湖泊修复工程实施提供科学依据和技术指导。

Eutrophication of waterbodies has been a global problem, which leads to cyanobacterial blooms causing water turbidity, and finally, deterioration of water quality. In case that the external phosphorus load of the water body has been cut off,it become critical to hold endogenous phosphorus release in order to reduce phosphorus loads inhibiting eutrophication. In this review, technology of the in-situ chemical passivation is described, which compared with the ectopic treatment, is simple and low cost in operation, as well as minor ecological impacts. The commonly used chemical reagents used in the passivation could be roughly divided into four categories:such ascalcium salts, iron salts, aluminum salts and lanthanum modified bentonite;all of them applied in engineering are summarized, as well as the research progress of various chemical reagents at home and abroad. It is expected that the review as a technical reference will be helpful in lake restoration engineering.