Removal of bacteriophage f2 in water by nanoscale zero-valent iron and parameters optimization using response surface methodology
Removal of bacteriophage f2 in water by nanoscale zero-valent iron and parameters optimization using response surface methodology
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DOI：
10.1016/j.cej.2014.05.003
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发表时间：
2014-09-15
影响因子：
15.1
通讯作者：
Zheng, Xiang
中科院分区：
文献类型：
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作者：
Cheng, Rong;Li, Guanqing;Zheng, Xiang
水中致病性肠道病毒的存在对人类健康构成重大风险。纳米零价铁（NZVI）由于其独特的特性，最近被提议用于各种环境修复。本研究以与人类肠道致病病毒相似的噬菌体f2为模型病毒，研究NZVI对水中病毒的去除效率。基于三水平、四变量 Box-Behnken 设计的响应面法 (RSM) 用于优化实验参数。结果显示，NZVI 在去除噬菌体 f2 方面表现出出色的能力，并且绝对比商业铁颗粒更有效。去除率随着NZVI剂量和旋转速度的增加而增加，但随着pH值和病毒浓度的增加而降低。去除过程涉及可逆吸附。浓度较低的噬菌体f2对酸性条件更敏感。数据拟合判定系数（R-2）为97.66%，表明该模型足以进行预测。 NZVI剂量和旋转速率之间的交互作用对病毒去除率以及四个自变量有显着影响。实验参数最佳值为：pH值：5.12，NZVI剂量：49.07 mg·L-1，病毒浓度：3.5 x 10(6) PFU/mL，转速：148.75 rpm。在此条件下，实现了 5.51 对数去除，这与所提出模型的预测值非常一致。 (C) 2014 Elsevier B.V. 保留所有权利。
The presence of pathogenic enteric viruses in water poses a significant risk to human health. Nanoscale zero-valent iron (NZVI) has recently been proposed for various environmental remediation due to its unique characteristics. Bacteriophage f2, which is similar to human enteric pathogenic virus, was used as the model virus to study the virus removal efficiency in the water by NZVI in this study. Response surface methodology (RSM), based on a three-level, four-variable Box-Behnken design, was applied to optimizing the experimental parameters. The results revealed that NZVI showed a brilliant ability in terms of removing bacteriophage f2 and was definitely more efficient than commercial iron particles. The removal rate was increased with the increase of NZVI dose and rotation rate, but decreased with the increase of pH value and virus concentration. The removal process involved reversible adsorption. The bacteriophage f2 with a lower concentration was more sensitive to acid condition. The determination coefficient (R-2) for data fitting was 97.66%, which indicated that the model was adequate for prediction. The interaction between NZVI dose and rotation rate had a significant effect on the removal rate of virus, as well as the four independent variables. The optimum values of experimental parameters were as follows: pH value: 5.12, NZVI dose: 49.07 mg L-1, virus concentration: 3.5 x 10(6) PFU/mL, rotation rate: 148.75 rpm. Under this condition, 5.51 log removal was achieved, which was in close agreement with the value predicted from the proposed model. (C) 2014 Elsevier B.V. All rights reserved.