Predicting breakthrough of vanadium in fixed-bed absorbent columns with complex groundwater chemistries: A multi-component granular ferric hydroxide−vanadate−arsenate−phosphate−silicic acid system
Predicting breakthrough of vanadium in fixed-bed absorbent columns with complex groundwater chemistries: A multi-component granular ferric hydroxide−vanadate−arsenate−phosphate−silicic acid system
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预测具有复杂地下水化学性质的固定床吸收塔中钒的突破：多组分颗粒状氢氧化铁→钒酸盐→砷酸盐→磷酸盐→硅酸体系
DOI：
10.1016/j.wroa.2020.100061
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发表时间：
2020
期刊：
影响因子：
7.5
通讯作者：
Kersten
中科院分区：
文献类型：
--
作者：
Dabizha;Kersten
颗粒状氢氧化铁（GFH）常用于世界各地地下水净化装置中的固定床吸附（FBA）柱，以去除砷酸盐污染物。地下水也可能含有其他有毒物质（例如，锑酸盐和钒酸盐）和无毒的含氧阴离子（磷酸盐和草酸），已知它们会影响FBA的寿命。因此，了解FBA去除有毒化合物的突破对于其设计至关重要，并且对于准确预测自来水厂中FBA的突破曲线（BTC）以规划未来的运营成本非常重要。快速小规模柱试验（RSCCT）和中试规模FBA被用来模拟复杂地下水化学的钒酸盐BTC。采用均相表面扩散模型（HSDM）结合平衡化学吸附和动力学传质成功地模拟了BTC。采用CD-MUSIC表面络合模型对不同地下水组分的吸附参数进行了预测，该模型首次建立了以赤霞石为基质的颗粒状氢氧化铁在竞争性多溶质体系中的吸附参数。结果表明，V（V）不太容易产生竞争吸附效应，采用均相表面扩散模型预测BTC时，需要将动力学传质毕奥数作为唯一的拟合参数。另一方面，可以观察到的两个较弱的吸收的含氧阴离子砷酸盐和磷酸盐，因为钒酸盐的位移的浓度超调。采用基于多溶质CD MUSIC模型的Freundlich常数kF = 3.2和毕奥数37，可以很好地外推3个不同地下水组成水厂中试规模的钒酸盐柱BTC结果。
Granular ferric hydroxide (GFH) is often used for fixed bed adsorbent (FBA) columns in groundwater purification units around the world to remove arsenate contaminations. Groundwater can contain also other toxic (e.g., antimonite and vanadate) and non-toxic oxo-anions (phosphate and silicic acid) that are known to affect FBA lifetimes. Therefore, understanding the breakthrough of toxic compounds intended for removal by FBA is essential to their design, and is important to predict accurately breakthrough curves (BTCs) for FBAs in waterworks to plan future operating costs. Rapid small-scale column tests (RSCCT) and pilot-scale FBA were used to simulate vanadate BTCs for complex groundwater chemistries. The BTCs were simulated successfully using a homogeneous surface diffusion model (HSDM) combining equilibrium chemical adsorption and kinetic mass transfer. Adsorption parameters for various groundwater compositions were predicted using the CD-MUSIC surface complexation model, which was set up for the first time for akaganéite-based granular ferric hydroxide with a competitive multi-solute system. The results indicated that V(V) is less prone to competitive adsorption effects, and use of the homogeneous surface diffusion model to predict the BTCs requires then the kinetic mass transfer Biot number to be used as the only fitting parameter. On the other hand, a concentration overshoot could be observed for the two weaker absorbed oxo-anions arsenate and phosphate because of displacement by the vanadate. Results of pilot scale test column BTCs of vanadate for three waterworks with different groundwater compositions could be favorably extrapolated with a unique Freundlich constant kFof 3.2 derived on basis of the multi-solute CD-MUSIC model, and a unique Biot number of 37 fixed for all three different test sites.
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影响因子：
7.8
作者：
M. Streat;K. Hellgardt;N.L.R. Newton
通讯作者：
M. Streat;K. Hellgardt;N.L.R. Newton
影响因子：
12.8
作者：
Sperlich, Alexander;Schimmelpfennig, Sebastian;Jekel, Martin
通讯作者：
Jekel, Martin
研磨对合成赤铜矿的影响
DOI：
--
发表时间：
1986
期刊：
影响因子：
--
作者：
E. Barrios;L. Hernán;Nuria Morales;J. Tirado
通讯作者：
J. Tirado
氧化铁浸渍活性炭柱中 As(V) 去除建模
DOI：
--
发表时间：
2007
期刊：
影响因子：
--
作者：
Ronald L. Vaughan;B. E. Reed;Edward H. Smith
通讯作者：
Edward H. Smith
DOI：
10.1016/j.colsurfa.2014.02.008
发表时间：
2014-04-20
影响因子：
5.2
作者：
Kersten, Michael;Karabacheva, Svetlana;Stanjek, Helge
通讯作者：
Stanjek, Helge