Adsorptive removal of arsenic in saturated sand filter containing amended adsorbents

Baig, Shams Ali; Sheng, Tiantian; Hu, Yunjun; Lv, Xiaoshu; Xu, Xinhua

doi:10.1016/j.ecoleng.2013.09.001

Cited by 21 publications

(17 citation statements)

References 54 publications

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“…Considered studies were published in various journals between 2000 and 2016 [56,57,[71][72][73][74][75][76][77][78][79]. Tables 2 and 3 show that system design differs in terms of the size of the columns, Fe 0 type, Fe 0 size, Fe 0 elemental composition, Fe 0 mass, Fe 0 ratio in the reactive layer (RZ, reactive zone), initial As concentration, initial pH value, flow rate, and duration of the experiments.…”

Section: The Variability Of Operational Conditionsmentioning

confidence: 99%

Making Fe0-Based Filters a Universal Solution for Safe Drinking Water Provision

et al. 2017

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Metallic iron (Fe 0 )-based filtration systems have the potential to significantly contribute to the achievement of the United Nations (UN) Sustainable Development Goals (SDGs) of substantially improving the human condition by 2030 through the provision of clean water. Recent knowledge on Fe 0 -based safe drinking water filters is addressed herein. They are categorized into two types: Household and community filters. Design criteria are recalled and operational details are given. Scientists are invited to co-develop knowledge enabling the exploitation of the great potential of Fe 0 filters for sustainable safe drinking water provision (and sanitation).

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Section: The Variability Of Operational Conditionsmentioning

confidence: 99%

Making Fe0-Based Filters a Universal Solution for Safe Drinking Water Provision

et al. 2017

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“…Elevated arsenic concentration in drinking water sources is an issue of global concern and threatens over 200 million people worldwide, especially in Asia. Arsenic has been reported in groundwater of Bangladesh, Cambodia, China, Taiwan, Mongolia, India, Japan, Myanmar, Nepal, Pakistan, Thailand, Viet Nam, and Iran (8)(9)(10). In the rural areas of west and northwest Iran, Kurdistan and Azerbaijan provinces, arsenic contamination of groundwater was reported (9).…”

Section: Introductionmentioning

confidence: 99%

“…Ingestion of inorganic arsenic could result in both cancer (skin, lung, and urinary bladder) and non-cancer effects (13). Long-term exposure to high levels of arsenic may cause serious health problems, including skin, cardiovascular, neurological, renal, and respiratory diseases in humans (8,14). To reduce the incidence of waterborne diseases and make the water suitable for human consumption, the removal of water pollutants are absolutely necessary (4,15).…”

Section: Introductionmentioning

confidence: 99%

“…More than 50 household treatment technologies exist worldwide for water pollution removal (24). Arsenic removal by low-cost adsorbents, such as filter based granulated adsorbents, has been the most promising technique, which meets all the mentioned criteria offering reliable and efficient performance for communities living in scattered settlements (8,25,27). However, natural adsorbents are favorable for their low-cost and abundant sources, yet, some studies have shown that they had no sufficient capacity to remove total arsenic (As (III) + As (V)) from water resources (28,29).…”

Section: Introductionmentioning

confidence: 99%

“…Arsenic exists in multiple oxidation states (+5, +3, 0 and -3); arsenate As (V) and arsenite As (III) are the most common inorganic forms of arsenic in aquatic environments. and greater mobility, which needs to be oxidized for better adsorbption of As (V) (8,11). Arsenic in aqueous systems can originate from natural sources (e.g., geochemical reactions and volcanic emissions) as well as anthropogenic activities (such as metal mining, industrial waste discharge, and agricultural use of arsenical pesticides) (12).…”

Section: Introductionmentioning

confidence: 99%

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Removal of Arsenic and Coliform Bacteria by Modified Sand Filter With Slag and Zeolite from Drinking Water

et al. 2017

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Background: Among the various adverse pollutants in water, coliform bacteria and arsenic are very important. Drinking of arseniccontaminated water has become a serious threat to public health and has affected millions of people across the world. Objectives: The aim of this study was to investigate the removal of arsenic and coliform bacteria from drinking water in small communities with the use of a conventional Slow Sand Filter (SSF) and modified filter by slag (SMF) and Zeolite (ZMF). Methods: In this study, initial concentrations of arsenic were 0.073, 0.11, 0.171, 0.21, 0.24, and 0.33 mg/l and the initial number of coliform bacteria was 4*10 6 MPN/100 mL. Arsenic and coliform bacteria samples were taken every 24 and 48 hours, respectively.

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Hexavalent Chromium Removal from Solutions: Surface Efficacy and Characterizations of Three Iron Containing Minerals

Baig

Wang

Zhuoxing

et al. 2014

CLEAN Soil Air Water

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In the present study, coupled reduction–sorption of Cr(VI) using three iron containing minerals (magnetite, hematite, and pyrrhotite) in aqueous solutions was investigated as a function of solution pH, contact time, and particle size. Detailed characterizations were performed using Brunauer–Emmett–Teller (BET), environmental scanning electron microscopy, and X‐ray diffraction (XRD) techniques. Results demonstrated that over 99% of Cr(VI) removal was achieved just after 1 min of the reaction using pyrrhotite with particle size (100–200 mesh). In comparison, removal efficiency of hematite and magnetite against Cr(VI) was below 40% after 2 h of the reaction. Acidic aqueous medium proved effective for Cr(VI) removal and nearly 100% Cr(VI) removal was achieved at pH 3 using pyrrhotite (30–40 mesh), while the surface efficacy of hematite and magnetite has also improved in acidic solution. In terms of removal efficiency, the three minerals followed the order: pyrrhotite > magnetite > hematite. However, no significant difference in the BET specific surface area was recorded among these minerals, but the mineralogical compositions played an important role for removing Cr(VI) in aqueous solutions. Analysis of XRD pattern revealed that iron contents produce Fe3FeSiO4(OH)5 and FeCr2O4 after the reaction with soluble Cr(VI) and precipitated. This study suggested that high ferrous ions‐based minerals can effectively remove Cr(VI) from contaminated water environments.

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Adsorptive removal of arsenic in saturated sand filter containing amended adsorbents

Cited by 21 publications

References 54 publications

Making Fe0-Based Filters a Universal Solution for Safe Drinking Water Provision

Making Fe0-Based Filters a Universal Solution for Safe Drinking Water Provision

Removal of Arsenic and Coliform Bacteria by Modified Sand Filter With Slag and Zeolite from Drinking Water

Hexavalent Chromium Removal from Solutions: Surface Efficacy and Characterizations of Three Iron Containing Minerals

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