位置:成果数据库 > 期刊 > 期刊详情页
铁盐-高岭土-PAC联用去除铜绿微囊藻的研究
  • ISSN号:1009-6094
  • 期刊名称:《安全与环境学报》
  • 时间:0
  • 分类:TU991.22[建筑科学—市政工程]
  • 作者机构:[1]湖南大学建筑安全与节能教育部重点实验室,长沙410082, [2]湖南大学土木工程学院,长沙410082, [3]湖南省环境监测中心站,长沙410004
  • 相关基金:国家自然科学基金项目(50778065);欧盟国际合作项目(PL510897);湖南省重点科技项目(03WHY1001)
中文摘要:

以聚合氯化铝(PAC)为絮凝剂,高岭土和铁盐(FeCl3)为助凝剂,研究去除水中铜绿微囊藻的适宜条件。结果表明,高岭土作前助凝剂、氯化铁作后助凝剂时,可显著提高PAC去除铜绿微囊藻的效果。PAC投加前将高岭土混匀在原水中,在絮凝阶段投加氯化铁后絮凝体体积增大,沉降速度明显加快。实验室条件下,氯化铁宜在絮凝开始后第3min投加,适宜投加量为1mg/L。研究表明,氯化铁作后助凝可使叶绿素a的去除率达94.07%,而且去除效果受水体pH值的影响变小。

英文摘要:

This paper takes its aim at finding the optimal way of removing Microcystis aeruginosa, a kind of frequently accounted alga in eutrophic waters, through PAC flocculation with FeCl3 and kaolin as sub-flocculant. As a kind of alga in eutrophic waters, Microcystis aeruginosa tends to release toxic extracellular polymers during its telophase growth. Therefore, we have chosen it as the model algae to evaluate algae removal efficiency through enhanced flocculation. As a matter of fact, our experiments have been done, which enabled us to find polyaluminum chloride (PAC) used as a superior flocculant to FeCl3 and PFS in alga removal at the same dosage. However, the removal efficiency of M. aeruginosa through PAC can be remarkably improved with the help of kaolin as pre-coagulant aid. When 20 mg/L kaolin and 15 mg/L PAC were added in the sequence when mixed uniformly into the sample, it was found that the removal efficiency of Chla turned to be speeded up to 82.34%, whereas the residue turbidity was found to drop to 2.0 NTU. In addition, if PAC was used as a main flocculant with kaolin and FeCl3 as pre- and postflocculant aids, it was possible to neutralize the charge with FeCl3 added. Moreover, increase of the volume of FeCl3 also resulted in speeding up the floc-sedimentation. It is thus suggested that FeCl3 could be added in 3 min after flocculation with 1 mg/L as an optimum dosage. And, finally, the effects of pH value could be evaluated in the range of 5 -9 on M. aeruginosa removal through PAC flocculation. Therefore, the results of our experiments have shown that the effects could be expected to get minimized while satisfied results could be obtained with FeCl3 used as post-flocculant aid. Furthermore, since kaolin is one kind of clay, which can be found almost everywhere, the method we propose here is highly promising for its low cost and high efficiency.

同期刊论文项目
同项目期刊论文
期刊信息
  • 《安全与环境学报》
  • 北大核心期刊(2011版)
  • 主管单位:中国兵器工业集团公司
  • 主办单位:北京理工大学 中国环境科学学会 中国职业安全健康协会
  • 主编:冯长根
  • 地址:北京市海淀区中关村南大街5号
  • 邮编:100081
  • 邮箱:aqyhjxb@263.net;aqyhjxb@wuma.com.cn
  • 电话:010-68913997
  • 国际标准刊号:ISSN:1009-6094
  • 国内统一刊号:ISSN:11-4537/X
  • 邮发代号:2-770
  • 获奖情况:
  • 获首届《CAJ-CD》执行优秀期刊奖,中国科技论文统计源期刊
  • 国内外数据库收录:
  • 美国化学文摘(网络版),中国中国科技核心期刊,中国北大核心期刊(2008版),中国北大核心期刊(2011版),中国北大核心期刊(2014版)
  • 被引量:17182