在国民经济不断发展的同时,因水环境污染所导致的水质恶化等问题也逐渐显现出来,大量污水被排放到城市水体,出现严重的黑臭现象.黑臭水体严重破坏生态环境、危害人体健康,还会削弱水体的自我净化能力.目前,针对黑臭水体的修复和治理已有较多研究,但是在实际治理过程中却存在投资大、难治理等问题,导致很多本质问题无法得到根治.基于此,文章对黑臭水体的治理措施展开了探讨,希望可以提升黑臭水体治理工作质量.

在环境污染日益严重的今天,因水环境污染所导致的水质恶化、水资源短缺问题应逐渐凸显出来,并对社会经济发展以及人们的日常生活造成了巨大影响,而对于受污染水体的生态修复,则正是解决这一问题的有效途径.基于此,本文对受污染水体生态修复需要遵循的基本原则进行了总结分析,同时对河流、湖泊水库、地下水等各类受污染水体的生态修复技术展开了探讨,希望能够水环境治理工作的有效推进提供一定参考.

The effect of perfluorooctane sulphonate(PFOS) on the Vibrio harveyi cell density and expression of extra-toxin gene was investigated.The Vibrio harveyi samples,which cultured in LB media with different PFOS concentrations(5,50,500 mmol/L),were collected by centrifugation(4 000 r/min) after 6,15 and 24 h incubation,respectively,and cell sediments were re-suspend in phosphate buffer solution(PBS).And the RT-PCR was used for analyzing the gene expression of extracellular protease,hemolysin and 16 SrRNA conserved sequence.The results shown that the cell density was inhibited significantly in the medium with 5 mmol/L PFOS(P0.01),but not for 50 mmol/L and 500 mmol/L.While three different concentration of PFOS enhanced the expression gene of ECP and hemolysin(P0.01).However,the gene expression of 16 SrRNA conserved sequence was boosted by 50 mmol/L PFOS only(P0.01).The hemolysin was also sensitive to the lower PFOS concentration.In sum,the data in this paper indicated the lower PFOS concentration will impact on the growth and gene expression of Vibrio harveyi.