Potential modification of groundwater arsenic removal filter commonly used in Nepal: A review

Timalsina, Haribansha; Mainali, Bandita; Angove, Michael J.; Komai, Takeshi; Paudel, Shukra Raj

doi:10.1016/j.gsd.2021.100549

Cited by 15 publications

(11 citation statements)

References 63 publications

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“…It is frequently detected in functional sites of proteins even though it is not an amino acid often observed in proteins and enzymes. Due to its reactivity, redox activity, polarizability, and high binding affinity for metals (such as arsenic (Poole, 2015;Shen et al, 2013;Timalsina et al, 2021)), L-Cys is an excellent candidate for incorporating adsorbents for this specific metal. The reaction between arsenic and sulfhydryl (thiol) compounds involves displacing the -OH ligands in the arsenic species by the R-SH group to yield the corresponding thiolate complexes (Carrero et al, 2001;Spuches et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

“…prepared nanoscale dialdehyde cellulose−cysteine fibers to remove As(III) from the water showing high adsorption capacity. Also, keratin protein has been used to improve arsenic removal efficiency, given that it contains around 20% by weight of L-Cys (Timalsina et al, 2021). L-Cys-based surfactants have also been synthesized as an environmentally friendly and biodegradable material with a cysteine headgroup for selective As(V) binding in water treatment (Makavipour et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Bio-inspired membranes for adsorption of arsenic via immobilized L-Cysteine in highly hydrophilic electrospun nanofibers

Picón

Torasso

Baudrit

et al. 2022

Chemical Engineering Research and Design

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bio-inspired membranes for adsorption of arsenic via immobilized L-Cysteine in highly hydrophilic electrospun nanofibers

Picón

Torasso

Baudrit

et al. 2022

Chemical Engineering Research and Design

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“…Timalsina et al reported that approximately 2-3 million people in Nepal are consuming arsenic-polluted water in the concentration range 10-50 µg As/L, while 0.37 million people are the consumers of arsenic-contaminated water with concentrations of more than 50 µg As/L. The study also reported the statistics of Terai district in Nepal, where almost 90% of the inhabitants depend on groundwater for their daily needs; the maximum arsenic concentration in this area was found to be 2620 µg/L [59].…”

Section: Asiamentioning

confidence: 75%

Arsenic Exposure via Contaminated Water and Food Sources

Rehman

Katsoyiannis

Kokkinos

et al. 2022

Water

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Arsenic poisoning constitutes a major threat to humans, causing various health problems. Almost everywhere across the world certain “hotspots” have been detected, putting in danger the local populations, due to the potential consumption of water or food contaminated with elevated concentrations of arsenic. According to the relevant studies, Asia shows the highest percentage of significantly contaminated sites, followed by North America, Europe, Africa, South America and Oceania. The presence of arsenic in ecosystems can originate from several natural or anthropogenic activities. Arsenic can be then gradually accumulated in different food sources, such as vegetables, rice and other crops, but also in seafood, etc., and in water sources (mainly in groundwater, but also to a lesser extent in surface water), potentially used as drinking-water supplies, provoking their contamination and therefore potential health problems to the consumers. This review reports the major areas worldwide that present elevated arsenic concentrations in food and water sources. Furthermore, it also discusses the sources of arsenic contamination at these sites, as well as selected treatment technologies, aiming to remove this pollutant mainly from the contaminated waters and thus the reduction and prevention of population towards arsenic exposure.

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“…The impact of arsenic (As) metal exposure in its various oxidation states is also harmful [21,22]. This metal can be generated as a by-product of coal combustion and manufacturing processes.…”

Section: Heavy Metal-contaminated Watermentioning

confidence: 99%

The Utilization of Algae and Seaweed Biomass for Bioremediation of Heavy Metal-Contaminated Wastewater

2022

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The presence of heavy metals in water bodies is linked to the increasing number of industries and populations. This has serious consequences for the quality of human health and the environment. In accordance with this issue, water and wastewater treatment technologies including ion exchange, chemical extraction, and hydrolysis should be conducted as a first water purification stage. However, the sequestration of these toxic substances tends to be expensive, especially for large scale treatment methods that require tedious control and have limited efficiency. Therefore, adsorption methods using adsorbents derived from biomass represent a promising alternative due to their great efficiency and abundance. Algal and seaweed biomass has appeared as a sustainable solution for environmentally friendly adsorbent production. This review further discusses recent developments in the use of algal and seaweed biomass as potential sorbent for heavy metal bioremediation. In addition, relevant aspects like metal toxicity, adsorption mechanism, and parameters affecting the completion of adsorption process are also highlighted. Overall, the critical conclusion drawn is that algae and seaweed biomass can be used to sustainably eliminate heavy metals from wastewater.

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Potential modification of groundwater arsenic removal filter commonly used in Nepal: A review

Cited by 15 publications

References 63 publications

Bio-inspired membranes for adsorption of arsenic via immobilized L-Cysteine in highly hydrophilic electrospun nanofibers

Bio-inspired membranes for adsorption of arsenic via immobilized L-Cysteine in highly hydrophilic electrospun nanofibers

Arsenic Exposure via Contaminated Water and Food Sources

The Utilization of Algae and Seaweed Biomass for Bioremediation of Heavy Metal-Contaminated Wastewater

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