Significant improvement on selectivity and capacity of glycine-modified FeCo-layered double hydroxides in the removal of As (V) from polluted water

Xiaofeng Shi, Junmao Hong, Le Kang, Gang Song, Jing Lin, Xianmin Mai, Nithesh Naik, Zhanhu Guo

Research output: Contribution to journalArticlepeer-review

Abstract

A series of novel Fe/Co layered double hydroxides modified with glycine (named as FeCo-LDH@G) were prepared and served as high-performance adsorbents for As (V). With a Fe/Co mole ratio of 1:1, the Fe0·02Co0.02-LDH@G adsorbents achieved significant improvements on the adsorption selectivity and capacity for As (V). The As (V) adsorption by Fe0·02Co0.02-LDH@G follows Langmuir isotherm model and pseudo-second-order kinetics model. The maximum adsorption capacity is 820 mg g−1 and the equilibrium reaches in 120 min. Under the assistance of electrochemical devices, the Fe0·02Co0.02-LDH@G adsorbent was regenerated and the adsorption capacity for As (V) was dropped only about 13.41% in 5 cycles. These excellent performances make Fe0·02Co0.02-LDH@G as promising As (V) adsorbents for commercial wastewater treatments.

Original languageEnglish
Article number130943
JournalChemosphere
Volume281
DOIs
Publication statusPublished - 10-2021

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Chemistry(all)
  • Environmental Chemistry
  • Pollution
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis

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