HEAVY METALS REMOVAL FROM SURFACE WATER WITH Moringa oleifera SEED EXTRACT AS FLOCCULANT AGENT

被引：0
|
作者：
Beltran-Heredia, J. [1 ]
Sanchez-Martin, J. [1 ]
机构：
[1] Univ Extremadura, Dept Chem Engn & Phys Chem, E-06071 Badajoz, Spain
来源：
FRESENIUS ENVIRONMENTAL BULLETIN | 2008年 / 17卷 / 12A期
关键词：
Heavy metals; drinking water; metal removal; coagulation-flocculation; natural flocculation agents; Moringa oleifera;
D O I：
暂无
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Moringa oleifera seeds extract has been tested for heavy metals removal from surface water. pH value has been revealed to be very significant as basic pH leads to hydroxide precipitation. Moringa oleifera capability for removing Cu2+, Zn2+ and Ni2+ has been explored through two proceedings: Jar-test assays and a pilot plant composed by a coagulation/flocculation tank, a sedimentator and a slow sand filter. Effectiveness of coagulation/flocculation process for removing these metals is around 10% in batch assays, and it is linked to turbidity removal. In order to improve this process, pilot plant with a recycle and filtration was implemented, so effectiveness raised up to 20%. Another property of Moringa oleifera can be considered in order to characterize its potential use in water treatment.
引用
收藏
页码：2134 / 2140
页数：7
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