Remediation of Arsenic by Metal/ Metal Oxide Based Nanocomposites/ Nanohybrids: Contamination Scenario in Groundwater, Practical Challenges, and Future Perspectives. Issue 3 (3rd July 2021)

• Record Type: Journal Article
• Authors: Kumar, Ajay; Joshi, Himanshu; Kumar, Anil
• Is Part Of: Separation and purification reviews. Volume 50:Issue 3(2021)
• Page Start: 283
• Page End: 314
• Publication Date: 2021-07-03
• Subjects: Arsenic remediation -- nanoadsorbents -- polymorphs -- synthesis protocols -- removal characteristics -- groundwater; Separation (Technology) -- Periodicals; Chemicals -- Purification -- Periodicals; 660.2842
• DOI: 10.1080/15422119.2020.1744649
• Languages: English
• ISSNs: 1542-2119

Abstract

ABSTRACT: Arsenic is a global concern as a groundwater contaminant due to its severe health consequences. Its removal employing nano adsorbents in both ex-situ and in-situ modes has gained attention among the scientific community from the past two and a half decades. Nanotechnology-based water treatment systems are a logical choice concerning resources and energy efficiency. The literature contains many cases in which several nanoadsorbents were used for arsenic removal. This review attempts to classify a variety of used nanoadsorbents according to their polymorphic structure and stability features, assessing the nature and modality of the bench-scale studies, identifying the removal mechanisms, and exploring further approaches for potential field-scale applications. A methodology to calculate the production cost of nanoadsorbents at a laboratory scale is also proposed.