Arsenic and selenium removal from water using biosynthesized nanoscale zero-valent iron: A factorial design analysis
Arsenic and selenium removal from water using biosynthesized nanoscale zero-valent iron: A factorial design analysis
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DOI：
10.1016/j.psep.2017.03.004
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发表时间：
2017-04-01
影响因子：
7.8
通讯作者：
Saleh, Tawfik A.
中科院分区：
文献类型：
--
作者：
Adio, Salawu Omobayo;Omar, Mohamed Hussein;Saleh, Tawfik A.
报道了以植物提取物为还原剂合成纳米级零价铁的环保方法。采用FESEM、EDS、XRD、FT-IR和TGA对合成的纳米颗粒进行了表征。通过因子设计分析，确定影响生物合成纳米级零价铁去除水中砷和硒的因素。调查的因素包括；pH、吸附剂用量、初始浓度、接触时间、振动筛转速。结果表明，吸附剂用量对水中砷的去除效果最为显著。在95%的置信水平下，当剂量变化在10 ~ 100 mg之间时，去除率增加30%以上。在溶液pH为3时，吸附剂浓度为100 mg，砷去除率约为95%。对硒的去除效果，吸附剂投加量表现出相对正的影响。在pH为3的Se溶液中，去除率约为90%，表明该材料对实际水样的适用性。(C) 2017化学工程师学会。Elsevier B.V.版权所有。
Environmentally friendly method is reported for the synthesis of nanoscale zero-valent iron using plant extract as a reducing agent. The biosynthesized nanoparticles were characterized using FESEM, EDS, XRD, FT-IR and TGA. A factorial design analysis was conducted to determine the influence of different factors affecting the removal of arsenic (As) and selenium (Se) from water using biosynthesized nanoscale zero-valent iron. The factors investigated include; pH, adsorbent dosage, initial concentration, contact time and shaker speed. It was observed that the effect of adsorbent dosage was most significant for the removal of arsenic from water. At 95% confidence level, dosage variation showed more than 30% increase in removal efficiency when it was varied between 10 mg and 100 mg. About 95% of arsenic removal was recorded using 100 mg adsorbent at solution pH 3. For selenium removal, the effect of adsorbent dosage showed a relatively positive influence. About 90% removal efficiency was recorded at Se solution of pH 3 which signifies the applicability of the material for real water samples. (C) 2017 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.