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首页> 外文会议>International Biohydrometallurgy Symposium >Copper Biosorption and Bioprecipitation by Eichhornia spp. And Sulphate Reducing Bacteria
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Copper Biosorption and Bioprecipitation by Eichhornia spp. And Sulphate Reducing Bacteria

机译：Eichhornia SPP的铜生物吸附和生物重建。和硫酸盐还原细菌

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Eichhornia spp. biomass collected from Chandola lake, Ahmedabad, Gujarat, India. Point of zero charge of the biomass was pH 7.3. Flask study showed pH 5 and 2 to 3 h contact time as optimum conditions for copper sorption. In 24 h of contact time, as high as 85% of copper was removed from 100 ppm copper containing solution. In first 2 h of the contact time the removal reached to 67.25%. Copper loading capacity of the biomass ranged between 2.85 to 1.0 g per 100 g of biomass. Influence of pH, temperature, nickel and zinc was studied by 24 factorial experiments. Under the experimental conditions pH and interactions between pH-nickel, temperature-pH and temperature-pH-nickel-zinc were found to be significant with 60 to 74.7% copper removal. As high as 95% of sorbed copper was desorbed with 0.1 N HNO_3. Langmuir and Freundlich isotherms were also studied. Reactor study showed 90% overall copper removal from 25 L of copper containing waste and sulfatereducing bacteria played a significant role. Treatment of actual waste also showed 61% of copper removal. SEMquant element analysis showed presence of 12.39% w/w of copper in the biomass exposed to the waste, where as only 0.0018% of copper was detected in unexposed biomass.
机译：Eichhornia spp。从印度古吉拉特邦的金刚玉湖，艾哈迈达巴德收集的生物量。生物质的零电荷点是pH 7.3。烧瓶研究显示pH 5和2至3 h接触时间作为铜吸附的最佳条件。在24小时的接触时间中，从100ppm含铜溶液中除去高达85％的铜。在前2小时的接触时间中，去除达到67.25％。生物质的铜加载能力范围为每100克生物质的2.85至1.0克。通过24个阶级实验研究了pH，温度，镍和锌的影响。在实验条件下，PH-镍，温度 - pH和温度-PH-镍 - 锌的pH和相互作用被发现具有60至74.7％的铜除去。高达95％的吸附铜，解吸了0.1n HNO_3。还研究了Langmuir和Freundlich等温机。反应堆研究表明，从含有25升含铜的废物和硫酸盐细菌中发挥了重要作用，反应堆研究总体铜除去了巨大的作用。实际废物的治疗也显示出铜去除的61％。 Hearmant Element分析显示在暴露于废物中的生物质中存在12.39％W / W的铜，其中仅在未曝光的生物质中检测到0.0018％的铜。

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