摘要
当前,藻类水花及其带来的藻毒素污染愈演愈烈,治理藻害成为改善水环境的当务之急。受安全、技术及成本的限制,人们试图通过改性粘土实现更加高效、安全的藻害去除效果。基于已有的研究成果,对改性粘土的除藻机理、改性方法及絮凝效果的影响因素进行了归纳总结。目前,改性粘土去除藻害的研究和应用大多局限于海水水体,很多淡水除藻的研究和实践尚未取得理想效果。今后可以考虑通过有机-无机改性结合的方法或开发新型改性剂拓展改性粘土技术絮凝除藻的应用范围。总之,开发相对安全、可防止蓝藻泛起、藻毒素释放及底泥营养盐二次污染等问题的改性粘土来絮凝沉降藻类,是未来利用改性粘土治理藻害需要解决的问题和重点研究方向。
Algal blooms and the consequent algal toxin have become more and more serious, due to eutrophication in waterbodies. Thus, mitigation of algal bloom hazards becomes more important to improve aquatic environment. Considering the safety, efficiency and cost, researchers have explored removing harmful algae through modified clay. On the basis of existing research results, this paper summarized the development and status of clay removing technology, including mechanisms of flocculation, modified methods and influencing factors. It is seen that the technology of modified clay for harmful algae removal was limited in marine, while few successful cases were reported in freshwater. Organic-inorganic modified or combined with other technologies could be considered to expand the application of modified clay flocculating method. In brief, developing relatively safe modified clay that could prevent release of algal toxins and sediment nutrients is the core issue and new research direction in future.
出处
《生态科学》
CSCD
北大核心
2014年第6期1218-1223,共6页
Ecological Science
基金
国家水体污染控制与治理科技重大专项"南水北调山东受水区饮用水安全保障技术研究与综合示范"课题(2012ZX07404-003)
国家科技惠民工程"直饮水科技惠民示范工程(2013GS370202)"
"饮用水安全保障技术"泰山学者建设工程专项(ts200640025)
山东省优秀中青年科学家科研奖励基金项目(BS2014HZ018)
关键词
絮凝
无机改性
有机改性
电动电势
架桥网捕
flocculation
inorgano-modification
organo-modification
Zeta potential
bridging and netting
