氢氧化镁对水质、底质改良的研究与应用

近年,沿海各地区水产养殖业发展迅速。由于内湾海区海水循环交换能力较弱,黑臭底泥的长期堆积,导致养殖水体水质和底质进一步恶化,然而这种问题普遍存在于封闭式或半封闭式水域环境中。对此,氢氧化镁作为水质、底质改良剂被应用于水环境的治理。本文概述了氢氧化镁的作用机理,包括氢氧化镁与悬浮颗粒物的静电、对氮磷的降解及对硫化氢的降解等作用;同时介绍了氢氧化镁在海水养殖场、淡水湖泊和水库、水华防控、赤潮防控及废水处理中的研究与应用;展望了氢氧化镁和纳米级氢氧化镁在水体环境领域的应用前景。

Research and utilization of magnesium hydroxide on the water quality and sediment improvement

In recent years,aquaculture developed rapidly in coastal areas.Due to the feeblish inner sea water circulation-exchange capacity and the long-term accumulation of black-odor sediment,aquaculture water quality and sediment become to be deteriorated further.But this problem generally exists in enclosed or semi-enclosed water environment.So magnesium hydroxide was used as water quality and sediment amendments for the treatment of water environment.The progress of research and utilization of magnesium hydroxide perform as water quality and sediment amendments in the field of water environment were commented in this paper.The mechanisms of magnesium hydroxide using in water environment,including the electrostatic effect between magnesium hydroxide and suspended particles,the degradation of nitrogen and phosphorus by magnesium hydroxide,and the degradation of hydrogen sulfide by magnesium hydroxide were profiled.The application of magnesium hydroxide in mariculture areas,freshwater lake,water reservoirs,water bloom prevention and control,red tide prevention and control and wastewater treatment were outlined.Numerous applications showed that magnesium hydroxide could be applied to improve the water conditions of aquaculture area,freshwater lake,water reservoirs,water bloom,red tide and wastewater.Application trend of magnesium hydroxide and nano-magnesium hydroxide in the field of water environment was prospected.