A review of functional sorbents for adsorptive removal of arsenic ions in aqueous systems

Botao Liu, Ki Hyun Kim, Vanish Kumar, Sumin Kim

Research output: Contribution to journalReview articlepeer-review

104 Citations (Scopus)

Abstract

The presence of arsenic in the water system has been a universal problem over the past several decades. Inorganic arsenic ions mainly occur in two oxidation states, As(V) and As(III), in the natural environment. These two oxidation states of arsenic ions are ubiquitous in natural waters and pose significant health hazards to humans when present at or above the allowable limits. Therefore, treatment of arsenic ions has become more stringent based on various techniques (e.g., membrane filtration, adsorption, and ion exchange). This paper aims to review the current knowledge on various functional adsorbents through comparison of removal potential for As on the basis of key performance metrics, especially the partition coefficient (PC). As a whole, novel materials exhibited far better removal performance for As(V) and As(III) than conventional materials. Of the materials reviewed, the advanced sorbent like ZrO(OH)2/CNTs showcased superior performances such as partition coefficient values of 584.6 (As(V) and 143.8 mol kg−1 M−1 (As(III) with excellent regenerability (>90 % of desorption efficiency after three sorption cycles). The results of this review are expected to help researchers to establish a powerful strategy for abatement of arsenic ions in wastewater.

Original languageEnglish
Article number121815
JournalJournal of Hazardous Materials
Volume388
DOIs
Publication statusPublished - 2020 Apr 15

Bibliographical note

Publisher Copyright:
© 2019 Elsevier B.V.

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

Fingerprint

Dive into the research topics of 'A review of functional sorbents for adsorptive removal of arsenic ions in aqueous systems'. Together they form a unique fingerprint.

Cite this