Distribution of As trapping along a ZVI/sand bed reactor
Distribution of As trapping along a ZVI/sand bed reactor
复制标题
ZVI/砂床反应器中砷捕集的分布
DOI：
10.1016/j.cej.2014.02.073
复制
发表时间：
2014-06
影响因子：
15.1
通讯作者：
Deluchat Véronique
中科院分区：
文献类型：
--
作者：
Wan Junfeng;Pressigout Jérémy;Simon Stéphane;Deluchat Véronique
零价铁(ZVI)反应器被广泛用于去除水中的砷，并得到了广泛的研究，尽管通常只考虑进水和出水的砷浓度。本文研究了以ZVI/砂为载体的曝气床反应器内砷的分布。在实验完成后，通过对砷浓度的经典监测和载体的分析来评价其去除性能。这两种类型的分析不仅在柱子进出口，而且还在不同的中间取样点进行，以便突出在柱子上遇到的不同行为。用Thomas模型模拟了穿透曲线，确定了吸附常数。这些不同的方法产生了相似的结果：虽然从一种方法到另一种方法铁的分布保持均匀，但床反应器入口处的砷脱除量是最终ZVI/砂层的五到六倍，达到170亿mg(As)/−1(Fe)。还研究了停留时间的影响，发现较高的砷负荷导致较大的保留在第一层柱层。
Zero-valent iron (ZVI) based reactors are widely used to remove arsenic from water and have been extensively studied, though typically by considering just the inlet and outlet arsenic concentrations. This paper presents the arsenic distribution inside an aerated bed reactor filled with a ZVI/sand support. The removal performance was evaluated through both the classical monitoring of arsenic concentrations and an analysis of the support upon completion of the experiment. Both types of analyses were performed not only at the column inlet and outlet but also at various intermediate sampling points in order to highlight the different behavior encountered along the column. The Thomas model was applied to simulate the breakthrough curves and determine sorption constants. These distinct approaches yielded similar results: while the iron distribution remained homogeneous from one approach to the next, the arsenic removal was five to six times higher at the inlet to the bed reactor than in the final ZVI/sand layer, reaching 170 mg(As) g−1(Fe). The influence of residence time was also studied, revealing that a higher arsenic load in the column led to greater retention within the first column layers.
登录
查看更多内容
影响因子：
8.6
作者：
T. Singh;K. Pant
通讯作者：
T. Singh;K. Pant
影响因子：
9.8
作者：
Cundy, Andrew B.;Hopkinson, Laurence;Whitby, Raymond L. D.
通讯作者：
Whitby, Raymond L. D.
影响因子：
13.6
作者：
Nguyen, Tien Vinh;Vigneswaran, Saravanamuthu;Kandasamy, Jaya
通讯作者：
Kandasamy, Jaya
影响因子：
4.7
作者：
R. P. Das;S. Anand
通讯作者：
R. P. Das;S. Anand
DOI：
10.1080/10934529.2013.776916
发表时间：
2013-05
期刊：
Journal of Environmental Science and Health, Part A
影响因子：
--
作者：
Junfeng Wan;S. Simon;V. Deluchat;M. Dictor;C. Dagot
通讯作者：
Junfeng Wan;S. Simon;V. Deluchat;M. Dictor;C. Dagot