A critical review on various remediation approaches for heavy metal contaminants removal from contaminated soils

Rajendran S 1 , Priya TAK 2 , Khoo KS 3 , Hoang TKA 4 , Ng HS 5 , Munawaroh HSH 6 Show all authors , Karaman C 7 , Orooji Y 8 , Show PL 9

Affiliations 

  • 1 Departamento de Ingeniería Mecánica, Facultad de Ingeniería, Universidad de Tarapacá, Avda. General Velásquez, 1775, Arica, Chile
  • 2 Department of Civil Engineering, KPR Institute of Engineering and Technology, Coimbatore, 641027, India
  • 3 Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia, Jalan Broga, Semenyih, 43500, Selangor Darul Ehsan, Malaysia; Faculty of Applied Sciences, UCSI University, No. 1, Jalan Menara Gading, UCSI Heights, 56000, Cheras, Kuala Lumpur, Malaysia
  • 4 Centre of Excellence in Transportation Electrification and Energy Storage, Hydro-Québec, 1806, boul. Lionel-Boulet, Varennes, J3X 1S1, Canada
  • 5 Faculty of Applied Sciences, UCSI University, No. 1, Jalan Menara Gading, UCSI Heights, 56000, Cheras, Kuala Lumpur, Malaysia
  • 6 Study Program of Chemistry, Department of Chemistry Education, Universitas Pendidikan Indonesia, Jalan Dr. Setiabudhi 229, Bandung, 40154, Indonesia
  • 7 Akdeniz University, Vocational School of Technical Sciences, Department of Electricity and Energy, Antalya, Turkey
  • 8 Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037, Jiangsu, PR China; Department of Civil Engineering, Xi'an Jiaotong-Liverpool University, Suzhou 215123, China
  • 9 Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia, Jalan Broga, Semenyih, 43500, Selangor Darul Ehsan, Malaysia. Electronic address: PauLoke.Show@nottingham.edu.my
Chemosphere, 2022 Jan;287(Pt 4):132369.
PMID: 34582930 DOI: 10.1016/j.chemosphere.2021.132369

Abstract

Heavy metal pollution remains a global environmental challenge that poses a significant threat to human life. Various methods have been explored to eliminate heavy metal pollutants from the environment. However, most methods are constrained by high expenses, processing duration, geological problems, and political issues. The immobilization of metals, phytoextraction, and biological methods have proven practical in treating metal contaminants from the soil. This review focuses on the general status of heavy metal contamination of soils, including the excessive heavy metal concentrations in crops. The assessment of the recent advanced technologies and future challenges were reviewed. Molecular and genetic mechanisms that allow microbes and plants to collect and tolerate heavy metals were elaborated. Tremendous efforts to remediate contaminated soils have generated several challenges, including the need for remediation methodologies, degrees of soil contamination, site conditions, widespread adoptions and various possibilities occurring at different stages of remediation are discussed in detail.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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