Pre‐deposited dynamic membrane adsorber formed of microscale conventional iron oxide‐based adsorbents to remove arsenic from water: application study and mathematical modeling

Abstract

BACKGROUND This study reports the development of a dynamic membrane (DM) adsorber by pre‐depositing powdered‐sizedfraction of iron oxide‐based adsorptive material on the surface of a microfiltration(MF) membrane. The aim is to use the developed DM adsorber for arsenate (As(V)) remediation from water by a combined mechanism of adsorptive and membrane filtration. The two applied iron oxide‐based adsorptive materials are micro‐sized granular ferric hydroxide and micro‐sized tetravalent manganese feroxyhyte, and are available at affordable price. RESULTS The results show that As(V) removal efficiency strongly depends on the physicochemical properties of the depositing material such as specific surface area, isoelectric point and particle size of the pre‐depositing material. The experimentally determined As(V) removal rates were mathematically modeled using a homogeneous surface diffusion model, which incorporates the equilibrium parameters and mass transport coefficients of the adsorption process. The simulations showed that the mathematical model could describe the As(V) removal rates accurately over a broad range of operating conditions. The results further showed that the longer filtration times with very low normalized As(V) permeate concentration (C/Cf = 0.1, for example) can be prolonged by operating the DM adsorber at the lowermost membrane water flux of 31 L m−2 h−1 and a large amount of pre‐depositing material on the MF membrane surface (Ma = 14 mg cm−2). CONCLUSION The results presented in this study confirm that use of these inexpensive materials (side‐product of granular iron oxide‐based adsorbents) in treating As(V)‐polluted water would enhance the sustainability of the industrial production process of conventional granular adsorbents by utilizing the wastes created during the process of adsorbent production. © 2021 The Authors. Journal of Chemical Technology and Biotechnology published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry (SCI).

Dynamic Membranes for Enhancing Resources Recovery from Municipal Wastewater

“…To overcome this issue, some authors have proposed using dynamic membranes (DM), showing promising results [10][11][12]. DMs consist of the formation of a cake layer on a low filtration-resistance supporting material, making the cake layer formed the main filtering actor [13]. Filtration resistance during DM operation can thus be easily controlled by physical cleaning methods and usually achieve significantly lower filtration resistance than those of other membrane technologies [10].…”

“…Additionally, the required supporting structures are generally low-cost materials such as filter-cloths and woven meshes, representing low investment cost for their acquisition and/or replacement [14]. Two different kinds of DMs can be defined depending on how the filtering cake layer is formed-namely, self-forming and pre-coated DMs [13,15]. Self-forming DMs are formed by developing the cake layer from the direct deposition onto the supporting structure of the suspended material and high molecular weight organics contained in the treated liquor while performing the filtration process.…”

Prediction of Arsenic Removal from Contaminated Water Using Artificial Neural Network Model

“…Long-term exposure can cause diabetes, pulmonary disease, cardiovascular disease, cancer, and skin lesions [2]. Various technologies, such as coagulation-filtration [3], membrane separation [4,5], ion exchange [6], adsorption [7,8], and hybrid membrane systems [9,10] have been employed to remove As from contaminated water. Among these methods, adsorption is probably the most effective separation method for the removal of hazardous heavy metals such as As from water.…”

Efficient Sorption of Arsenic on Nanostructured Fe-Cu Binary Oxides: Influence of Structure and Crystallinity

“…Various adsorbents have been developed and used for arsenic removal ( Mohan and Pittman, 2007 ). Recently, metal (hydr)oxides such as Fe (hydr)oxides ( Sowers et al, 2017 ; Usman et al, 2020 ), feroxyhyte ( Usman et al, 2021 ), Al oxides ( Han et al, 2013 ; Mertens et al, 2016 ), TiO 2 ( Guan et al, 2012 ; Yan et al, 2015 ), ZrO 2 ( Hristovski et al, 2008 ; Cui et al, 2012 ; Shehzad et al, 2019 ), CeO 2 ( Srivastava, 2010 ; Li et al, 2012 ), CuO ( Martinson and Reddy, 2009 ; Yu et al, 2012 ; Reddy et al, 2013 ) etc., have attracted considerable attention because they exhibit strong sorption properties towards arsenic.…”