Arsenic reduction to &lt;1 µg/L in Dutch drinking water

Arslan, Ahmad; Wens, Patrick van der; Baken, Kirsten; Waal, Luuk de; Bhattacharya, Prosun; Stuyfzand, Pieter J.

doi:10.1016/j.envint.2019.105253

Cited by 103 publications

(43 citation statements)

References 74 publications

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“…Arsenic contaminations in drinking water has become a global issue and there are several natural weathering reactions and anthropogenic activities behind it. According to World Health Organisation (WHO), arsenic contamination above 10 µg/L is not acceptable in the drinking water (Ahmad et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

WITHDRAWN: Column Experiments on Arsenic Removal Through Adsorption From Water Using Different Natural and Synthetic Adsorbents

Khan¹,

Imteaz²

2021

Preprint

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With the aim of exploring a best adsorbent from locally available sands for removing arsenic from water, eight different adsorbents are tested through column experiments using those materials as filter bed. Based on earlier batch experimental results five locally available sands (Scoria, Skye, Iron ore, NT red and TGS), one commercial sand (GFH) and two synthetic sands (IOCS and IOCS-AOCS) were selected for the column experiments. Target was to treat arsenic from water up to WHO standard level of 10 µg/L for a considerable period. It is found that Skye sand is capable to treat arsenic-contaminated water to the WHO standard for the longest period, followed by TGS, Iron ore and NT red sands. Scoria sand is unable to treat water up to the WHO standard. Although, GFH, IOCS and IOCS-AOCS are capable to remove arsenic to an excellent level, however practically not suitable as they get clogged due to accumulation of finer particles in the filter bed. Also, it is found that artificial coatings enhance the arsenic removal capabilities, however susceptible to clogging.

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Section: Introductionmentioning

confidence: 99%

WITHDRAWN: Column Experiments on Arsenic Removal Through Adsorption From Water Using Different Natural and Synthetic Adsorbents

Khan¹,

Imteaz²

2021

Preprint

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“…Recent studies show that arsenic levels even below 10 µg/L can cause significant increases in excess cancers, which calls for innovative treatment solutions that can remove arsenic to <1 µg/L. 63 Our results show that ACAIE can achieve arsenic removal <1 µg/L at CDRs of 1.5 and 6 C/L/min. At higher CDRs (and shorter treatment duration) 1 µg/L arsenic can be likely achieved by increasing and optimizing the total charge dose, which is currently under investigation in our laboratory.…”

Section: Technical and Environmental Implicationsmentioning

confidence: 53%

Rapid and Efficient Arsenic Removal by Iron Electrocoagulation Enabled with in Situ Generation of Hydrogen Peroxide

Bandaru

Genuchten

Kumar

et al. 2020

Environ. Sci. Technol.

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Millions of people are exposed to toxic levels of dissolved arsenic in groundwater used for drinking. Iron electrocoagulation (FeEC) has been demonstrated as an effective technology to remove arsenic at an affordable price. However, FeEC requires long operating times (∼hours) to remove dissolved arsenic due to inherent kinetics limitations. Air cathode Assisted Iron Electrocoagulation (ACAIE) overcomes this limitation by cathodically generating H2O2 in situ. In ACAIE operation, rapid oxidation of Fe(II) and complete oxidation and removal of As(III) are achieved. We compare FeEC and ACAIE for removing As(III) from an initial concentration of 1464 μg/L, aiming for a final concentration of less than 4 μg/L. We demonstrate that at short electrolysis times (0.5 min), i.e., high charge dosage rates (1200 C/L/min), ACAIE consistently outperformed FeEC in bringing arsenic levels to less than WHO-MCL of 10 μg/L. Using XRD and XAS data, we conclusively show that poor arsenic removal in FeEC arises from incomplete As(III) oxidation, ineffective Fe(II) oxidation and the formation of Fe(II–III) (hydr)oxides at short electrolysis times (<20 min). Finally, we report successful ACAIE performance (retention time 19 s) in removing dissolved arsenic from contaminated groundwater in rural California.

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“…In Gujarat State, only a low percentage of people (0.07%) were exposed to high arsenic groundwaters, and most people are likely to be exposed to low groundwater concentrations of arsenic. However, many studies (Medrano et al 2010;Moon et al 2017;Polya et al 2019b;Ahmad et al 2020) pointed out that low concentrations of arsenic also pose health risks to humans, although the harm is not as serious as that arising from higher arsenic concentrations in drinking water. Accounting for 48% of rural household water supplied being through hand pumps and tube wells (The World Bank 2006) and 29% of urban households using untreated taps, bore wells, hand pumps and wells as water supply infrastructure (IIHS 2014), we estimate that approximately 49,000 people in Gujarat are exposed to elevated arsenic contamination ([ 10 lg/L) through domestic consumption of groundwater.…”

Section: Potential Exposure Mapmentioning

confidence: 99%

“…The long-term consumption of arsenic may greatly increase the risk of skin cancers, bladder cancers, lung cancers, cardiovascular disease and other detrimental health outcomes (Chen and Ahsan 2004 ; Chowdhury et al 2000 ). The provisional guideline value of arsenic in drinking water established by the World Health Organization (WHO) is 10 μg/L (WHO/UNICEF 2018 ); however, an increasing number of studies have pointed to detrimental health outcomes for exposure at lower arsenic concentrations (Medrano et al 2010 ; García-Esquinas et al 2013 ; Monrad et al 2017 ; Moon et al 2017 ; Polya et al 2019b ; Ahmad et al 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Geostatistical model of the spatial distribution of arsenic in groundwaters in Gujarat State, India

Podgorski

Berg

et al. 2020

Environ Geochem Health

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Geogenic arsenic contamination in groundwaters poses a severe health risk to hundreds of millions of people globally. Notwithstanding the particular risks to exposed populations in the Indian sub-continent, at the time of writing, there was a paucity of geostatistically based models of the spatial distribution of groundwater hazard in India. In this study, we used logistic regression models of secondary groundwater arsenic data with research-informed secondary soil, climate and topographic variables as principal predictors generate hazard and risk maps of groundwater arsenic at a resolution of 1 km across Gujarat State. By combining models based on different arsenic concentrations, we have generated a pseudo-contour map of groundwater arsenic concentrations, which indicates greater arsenic hazard ([ 10 lg/L) in the northwest, northeast and southeast parts of Kachchh District as well as northwest and southwest Banas Kantha District. The total number of people living in areas in Gujarat with groundwater arsenic concentration exceeding 10 lg/L is estimated to be around 122,000, of which we estimate approximately 49,000 people consume groundwater exceeding 10 lg/L. Using simple previously published doseresponse relationships, this is estimated to have given rise to 700 (prevalence) cases of skin cancer and around 10 cases of premature avoidable mortality/ annum from internal (lung, liver, bladder) cancersthat latter value is on the order of just 0.001% of internal cancers in Gujarat, reflecting the relative low groundwater arsenic hazard in Gujarat State.

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Arsenic reduction to <1 µg/L in Dutch drinking water

Cited by 103 publications

References 74 publications

WITHDRAWN: Column Experiments on Arsenic Removal Through Adsorption From Water Using Different Natural and Synthetic Adsorbents

WITHDRAWN: Column Experiments on Arsenic Removal Through Adsorption From Water Using Different Natural and Synthetic Adsorbents

Rapid and Efficient Arsenic Removal by Iron Electrocoagulation Enabled with in Situ Generation of Hydrogen Peroxide

Geostatistical model of the spatial distribution of arsenic in groundwaters in Gujarat State, India

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Arsenic reduction to <1 µg/L in Dutch drinking water

Cited by 103 publications

References 74 publications

WITHDRAWN: Column Experiments on Arsenic Removal Through Adsorption From Water Using Different Natural and Synthetic Adsorbents

WITHDRAWN: Column Experiments on Arsenic Removal Through Adsorption From Water Using Different Natural and Synthetic Adsorbents

Rapid and Efficient Arsenic Removal by Iron Electrocoagulation Enabled with in Situ Generation of Hydrogen Peroxide

Geostatistical model of the spatial distribution of arsenic in groundwaters in Gujarat State, India

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Resources

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Arsenic reduction to <1 µg/L in Dutch drinking water