Arsenic Remediation of Bangladesh Drinking Water Using Iron Oxide–Coated Coal Ash

Gadgil, Ashok; Gundel, Lara A.; Galitsky, Christina

doi:10.1002/9780470371046.ch11

Cited by 4 publications

(5 citation statements)

References 15 publications

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“…Illustrative results from our first field visit in March 2007 are presented in Figure 1 and in Gadgil et al 2008. A comparison of field tests to lab test shows that more ARUBA is required to remove arsenic in Bangladesh groundwater than arsenic-spiked de-ionized water.…”

Section: Arsenic Removalmentioning

confidence: 99%

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Removing Arsenic from Contaminated Drinking Water in Rural Bangladesh: Recent Fieldwork Results and Policy Implications

Mathieu

2009

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ARUBA (Arsenic Removal Using Bottom Ash) has proven effective at removing high concentrations of arsenic from drinking water in Bangladesh. During fieldwork in four sub-districts of the country, ARUBA reduced arsenic levels ranging from 200 to 900 ppb to below the Bangladesh standard of 50 ppb. The technology is cost-effective because the substrate-bottom ash from coal fired power plants-is a waste material readily available in South Asia. In comparison to similar technologies, ARUBA uses less media for arsenic removal due to its high surface area to volume ratio. Hence, less waste is produced. A number of experiments were conducted in Bangladesh to determine the effectiveness of various water treatment protocols. It was found that (1) ARUBA removes more than half of the arsenic from water within five minutes of treatment, (2) ARUBA, that has settled at the bottom of a treatment vessel, continues to remove arsenic for 2-3 days, (3) ARUBA's arsenic removal efficiency can be improved through sequential partial dosing (adding a given amount of ARUBA in fractions versus all at once), and (4) allowing water to first stand for two to three days followed by treatment with ARUBA produced final arsenic levels ten times lower than treating water directly out of the well. Our findings imply a number of tradeoffs between ARUBA's effective arsenic removal capacity, treatment system costs, and waste output. These tradeoffs, some a function of arsenic-related policies in Bangladesh (e.g., waste disposal regulations), must be considered when designing an arsenic removal system. We propose that the most attractive option is to use ARUBA in communityscale water treatment centers, installed as public-private partnerships, in Bangladeshi villages.

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Section: Arsenic Removalmentioning

confidence: 99%

“…Scientists at the Lawrence Berkeley National Laboratory have developed a simple material named "ARUBA"-Arsenic Removal Using Bottom Ash that inexpensively and effectively removes arsenic from drinking water (Gadgil et al 2008;Patel et al 2006). ARUBA (also referred to as "media" in this document) uses bottom ash as a substrate.…”

Section: Introductionmentioning

confidence: 99%

Removing Arsenic from Contaminated Drinking Water in Rural Bangladesh: Recent Fieldwork Results and Policy Implications

Mathieu

2009

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“…This method is based on coating coal bottom ash with ferric (hydr)oxide to create an arsenic removal media called 'Arsenic Removal Using Bottom Ash,' or ARUBA. Early work on ARUBA was published in Gadgil et al [20] . ARUBA is novel and of interest for the following reasons:…”

Section: Introductionmentioning

confidence: 99%

Arsenic remediation of drinking water using iron-oxide coated coal bottom ash

Mathieu

Gadgil

Addy

et al. 2010

Journal of Environmental Science and Health, Part A

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We describe laboratory and field results of a novel arsenic removal adsorbent called 'Arsenic Removal Using Bottom Ash' (ARUBA). ARUBA is prepared by coating particles of coal bottom l fired power plants, with iron (hydr)oxide. The coating process is * Address correspondence to Ashok Gadgil, Lawrence Berkeley National Laboratory, 1Cyclotron Rd MS 90R3058, Berkeley, CA 94720, USA; Phone: Email: ajgadgil@lbl.gov. 3 simple and conducted at room temperature and atmospheric pressure. Material costs for ARUBA are estimated to be low (~$0.08 per kg) and arsenic remediation with ARUBA has the potential to be affordable to resource-constrained communities. ARUBA is used for removing arsenic via a dispersal-and-removal process, and we envision that ARUBA would be used in community-scale water treatment centers. We show that ARUBA is able to reduce arsenic concentrations in This makes it easy to determine the amount of ARUBA required to treat a groundwater source when its arsenic concentration is known and less than 1600 ppb. Storing contaminated groundwater for two to three days before treatment is seen to significantly increase ARUBA's AAD. ARUBA can be separated from treated water by coagulation and clarification, which is expected to be less expensive than filtration of micron-scale particles, further contributing to the affordability of a community-scale water treatment center.

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“…In our prior work, we have detailed ARUBA's effectiveness in removing arsenic from contaminated Bangladesh groundwater (Mathieu et al 2008;Gadgil et al 2008).…”

Section: Design Strategiesmentioning

confidence: 99%

Design Strategies and Preliminary Prototype for a Low-Cost Arsenic Removal System for Rural Bangladesh

Mathieu¹,

Gadgil²,

Kowolik³

et al. 2009

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Arsenic Remediation of Bangladesh Drinking Water Using Iron Oxide–Coated Coal Ash

Cited by 4 publications

References 15 publications

Removing Arsenic from Contaminated Drinking Water in Rural Bangladesh: Recent Fieldwork Results and Policy Implications

Removing Arsenic from Contaminated Drinking Water in Rural Bangladesh: Recent Fieldwork Results and Policy Implications

Arsenic remediation of drinking water using iron-oxide coated coal bottom ash

Design Strategies and Preliminary Prototype for a Low-Cost Arsenic Removal System for Rural Bangladesh

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