Environmental arsenic in a changing world

Arslan, Ahmad; Bhattacharya, Prosun

doi:10.1016/j.gsd.2018.11.001

Cited by 19 publications

(7 citation statements)

References 735 publications

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“…Affordable water can translate into improved health care access and nutrition, which might reduce susceptibility to the poor health outcomes caused by higher levels of water contamination. Exacerbating this dilemma, the evidence for adverse health effects at lower levels of contaminant exposure tends to be weaker and more contested than the evidence at higher levels of exposure [e.g., for As (61)]. Different agencies approach this debate with different perspectives and priorities, under different political and lobbying pressures and lobbying efforts, resulting in MCLs and guideline values that vary widely (Table 1).…”

Section: Health Impactsmentioning

confidence: 99%

Chemical Contamination of Drinking Water in Resource-Constrained Settings: Global Prevalence and Piloted Mitigation Strategies

Amrose

Cherukumilli

Wright

2020

Annu. Rev. Environ. Resour.

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Chemical contamination of drinking water (including salinity) puts more than one billion people at risk of adverse health effects globally. Resource-constrained communities are the most affected and face unique challenges that require innovative safe water solutions. This review focuses on arsenic, fluoride, nitrates, lead, chromium, total dissolved solids, emerging organic contaminants, and, to a lesser extent, manganese, cadmium, selenium, and uranium. It covers contaminant prevalence, major health effects, and treatment technologies or avoidance strategies that have been proven effective in realistic water matrices and conditions. The review covers the levelized costs of water for pilot- and full-scale systems most relevant to resource-constrained communities, with a focus on component costs including the costs of power systems, lifting water, waste management, and labor. These costs are not universally reported, but can be significant. The findings are analyzed and discussed in the context of providing sustainable safe water solutions in resource-constrained settings. Expected final online publication date for the Annual Review of Environment and Resources, Volume 45 is October 19, 2020. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

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Section: Health Impactsmentioning

confidence: 99%

Chemical Contamination of Drinking Water in Resource-Constrained Settings: Global Prevalence and Piloted Mitigation Strategies

Amrose

Cherukumilli

Wright

2020

Annu. Rev. Environ. Resour.

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“…13 In July 2018, China hosted the seventh International Congress on Arsenic in the Environment, which included sustainable management and mitigation of arsenic removal. 18 The United Nations (UN) members stated an agreement on the 2030 Agenda for Sustainable Development, which aimed to guide national and international initiatives in the next 15 years, highlighting the importance of paying attention to arsenic removal so everyone has access to clean water. 18 Several arsenic removal methods have been utilized, including coagulation, adsorption, ion exchange, and membrane separation.…”

Section: Introductionmentioning

confidence: 99%

“…As population and industrialization rise, access to potable water becomes increasingly challenging. − Arsenic levels in many countries like Pakistan, Bangladesh, China, Taiwan, America, India, and Mexico are alarmingly high. − It has been classified as carcinogenic and poisonous. , It can cause liver, kidney, lung, and bladder cancer if ingested continuously, even in minute amounts (ppb). − The WHO (World Health Organization) current maximum allowable arsenic concentration in drinking water is 10 g/L (ppb). − Nonetheless, many developing nations continue to adhere to the previous guideline of 50 g/L due to inadequate infrastructure and costly water treatment technologies . In July 2018, China hosted the seventh International Congress on Arsenic in the Environment, which included sustainable management and mitigation of arsenic removal . The United Nations (UN) members stated an agreement on the 2030 Agenda for Sustainable Development, which aimed to guide national and international initiatives in the next 15 years, highlighting the importance of paying attention to arsenic removal so everyone has access to clean water …”

Section: Introductionmentioning

confidence: 99%

“…18 The United Nations (UN) members stated an agreement on the 2030 Agenda for Sustainable Development, which aimed to guide national and international initiatives in the next 15 years, highlighting the importance of paying attention to arsenic removal so everyone has access to clean water. 18 Several arsenic removal methods have been utilized, including coagulation, adsorption, ion exchange, and membrane separation. 15,19 Adsorption is thought to be the most appropriate and effective approach for removing toxins from water and wastewater due to its high effectiveness and low cost.…”

Section: Introductionmentioning

confidence: 99%

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Screening of Metal Oxides and Hydroxides for Arsenic Removal from Water Using Molecular Dynamics Simulations

Hira,

Lock,

Arshad

et al. 2023

ACS Omega

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Arsenic in groundwater is a harmful and hazardous substance that must be removed to protect human health and safety. Adsorption, particularly using metal oxides, is a cost-effective way to treat contaminated water. These metal oxides must be selected systematically to identify the best material and optimal operating conditions for the removal of arsenic from water. Experimental research has been the primary emphasis of prior work, which is time-consuming and costly. The previous simulation studies have been limited to specific adsorbents such as iron oxides. It is necessary to study other metal oxides to determine which ones are the most effective at removing arsenic from water. In this work, a molecular simulation computational framework using molecular dynamics and Monte Carlo simulations was developed to investigate the adsorption of arsenic using various potential metal oxides. The molecular structures have been optimized and proceeded with sorption calculations to observe the adsorption capabilities of metal oxides. In this study, 15 selected metal oxides were screened at a pressure of 100 kPa and a temperature of 298 K for As(V) in the form of HAsO 4 at pH 7. Based on adsorption capacity calculations for selected metal oxides/hydroxides, aluminum hydroxide (Al(OH) 3 ), ferric hydroxide (FeOOH), lanthanum hydroxide La(OH) 3 , and stannic oxide (SnO 2 ) were the most effective adsorbents with adsorption capacities of 197, 73.6, 151, and 42.7 mg/g, respectively, suggesting that metal hydroxides are more effective in treating arsenic-contaminated water than metal oxides. The computational results were comparable with previously published literature with a percentage error of 1%. Additionally, SnO 2 , which is rather unconventional to be used in this application, demonstrates potential for arsenic removal and could be further explored. The effects of pH from 1 to 13, temperature from 281.15 to 331.15 K, and pressure from 100 to 350 kPa were studied. Results revealed that adsorption capacity decreased for the high-temperature applications while experiencing an increase in pressure-promoted adsorption. Furthermore, response surface methodology (RSM) has been employed to develop a regression model to describe the effect of operating variables on the adsorption capacity of screened adsorbents for arsenic removal. The RSM models utilizing CCD (central composite design) were developed for Al(OH) 3 , La(OH) 3 , and FeOOH, having R 2 values 0.92, 0.67, and 0.95, respectively, suggesting that the models developed were correct.

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“…Health problems have been associated with chronic intake of F at this concentration, however, and thus many international organizations now recommend an even lower F limit of 700 μg/L (Amalraj and Pius, 2013). As and F co-occurrence in groundwater is generally associated with volcanic rocks (Ahmad and Bhattacharya, 2019;Kumar et al, 2016;Smedley and Kinniburgh, 2002). The health impacts of this co-occurrence are less well known, and may be different than the added effects of individual exposures to As and F.…”

Section: Introductionmentioning

confidence: 99%

Co-occurrence, possible origin, and health-risk assessment of arsenic and fluoride in drinking water sources in Mexico: Geographical data visualization

Alarcón-Herrera

Martin-Alarcon²,

Gutiérrez

et al. 2020

Science of The Total Environment

166

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Environmental arsenic in a changing world

Cited by 19 publications

References 735 publications

Chemical Contamination of Drinking Water in Resource-Constrained Settings: Global Prevalence and Piloted Mitigation Strategies

Chemical Contamination of Drinking Water in Resource-Constrained Settings: Global Prevalence and Piloted Mitigation Strategies

Screening of Metal Oxides and Hydroxides for Arsenic Removal from Water Using Molecular Dynamics Simulations

Co-occurrence, possible origin, and health-risk assessment of arsenic and fluoride in drinking water sources in Mexico: Geographical data visualization

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