Agricultural waste materials for adsorptive removal of phenols, chromium (VI) and cadmium (II) from wastewater: A review


Othmani A., Magdouli S., Kumar P. S. , Kapoor A., Chellam P. V. , Gökkuş Ö.

Environmental Research, vol.204, no.111916, pp.1-19, 2021 (Journal Indexed in SCI)

  • Publication Type: Article / Article
  • Volume: 204 Issue: 111916
  • Publication Date: 2021
  • Doi Number: 10.1016/j.envres.2021.111916
  • Title of Journal : Environmental Research
  • Page Numbers: pp.1-19

Abstract

Management  of  basic  natural  resources  and  the  spent  industrial  and  domestic  streams  to provide a sustainable safe environment for healthy living is a magnum challenge to scientists and  environmentalists.  The  present  remedial  approach  to  the  wastewater  focuses  on recovering  pure  water  for  reuse  and  converting  the  contaminants  into  a  solid  matrix  for permanent land disposal. However, the ground water aquifers, over a long period slowly leach the  contaminants  consequently  polluting  the  ground  water.  Synthetic  adsorbents,  mainly consisting of polymeric resins, chelating agents, etc. are efficient and have high specificity, but ultimate disposal is a challenge as most of these materials are non-biodegradable.  In this context,  it  is  felt  appropriate  to  review  the  utility  of  adsorbents  based  on  natural  green materials such as agricultural waste and restricted to few model contaminants: phenols, and heavy  metals  chromium(VI),  and  cadmium(II)  in  view  of  the  vast  amount  of  literature available.  The  article  discusses  the  features  of  the  agricultural  waste  material-based adsorbents including the mechanism. It is  inferred  that agricultural waste  materials are  some of the  common renewable sources available across the globe and can be used as  sustainable adsorbents.  A  discussion  on  challenges  for  industrial  scale  implementation  and  integration with advanced technologies like magnetic-based approaches and nanotechnology to improve the removal efficiency is included for future prospects.