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- Title
Arsenic in drinking water: overview of removal strategies and role of chitosan biosorbent for its remediation.
- Authors
Ayub, Asif; Srithilat, Khaysy; Fatima, Irum; Panduro-Tenazoa, Nadia Masaya; Ahmed, Iqbal; Akhtar, Muhammad Usman; Shabbir, Waqas; Ahmad, Khalil; Muhammad, Ali
- Abstract
Accessibility to clean drinking water often remains a crucial task at times. Among other water pollutants, arsenic is considered a more lethal contaminant and has become a serious threat to human life globally. This review discussed the sources, chemistry, distribution, and toxicity of arsenic and various conventional technologies that are in option for its removal from the water system. Nowadays, biosorbents are considered the best option for arsenic-contaminated water treatment. We have mainly focused on the need and potential of biosorbents especially the role of chitosan-based composites for arsenic removal. The chitosan-based sorbents are economically more efficient in terms of their, low toxicity, cost-effectiveness, biodegradability, eco-friendly nature, and reusability. The role of various modification techniques, such as physical and chemical, has also been evaluated to improve the physicochemical properties of biosorbent. The importance of adsorption kinetic and isotherm models and the role of solution pH and pHPZC for arsenic uptake from the polluted water have also been investigated. Some other potential applications of chitosan-based biosorbents have also been discussed along with its sustainability aspect. Finally, some suggestions have been highlighted for further improvements in this field.
- Subjects
CHITOSAN; WATER pollution; ARSENIC poisoning; WATER purification; ARSENIC removal (Water purification); ADSORPTION isotherms; ARSENIC in water; DRINKING water
- Publication
Environmental Science & Pollution Research, 2022, Vol 29, Issue 43, p64312
- ISSN
0944-1344
- Publication type
Article
- DOI
10.1007/s11356-022-21988-z