使用单宁基絮凝剂去除受污染地表水中的重金属。
Removing heavy metals from polluted surface water with a tannin-based flocculant agent.
作者信息
Beltrán Heredia J, Sánchez Martín J
机构信息
Department of Chemical Engineering and Physical Chemistry, Universidad de Extremadura, Badajoz, Spain.
出版信息
J Hazard Mater. 2009 Jun 15;165(1-3):1215-8. doi: 10.1016/j.jhazmat.2008.09.104. Epub 2008 Oct 7.
Many environmental and health problems come from the presence of metals in surface water. Effectiveness of a new commercial tannin-based flocculant has been tested in order to remove Zn(2+), Ni(2+) and Cu(2+) by coagulation-flocculation process. pH has been adjusted in order to evaluate the real heavy metal removal due just to flocculant effect and not to hydroxide precipitation. At least a 75% of metal removal has been reported in every case, depending on pH value. Flocculant doses have been reported to be about 100-150 ppm.
许多环境和健康问题源于地表水中金属的存在。为了通过混凝-絮凝工艺去除锌离子（Zn(2+)）、镍离子（Ni(2+)）和铜离子（Cu(2+)），对一种新型商用单宁基絮凝剂的有效性进行了测试。已调节pH值，以评估仅因絮凝剂作用而非氢氧化物沉淀导致的实际重金属去除情况。在每种情况下，根据pH值，金属去除率至少达到75%。据报道，絮凝剂剂量约为100 - 150 ppm。
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