Journal article
A comparison of technologies for remediation of heavy metal contaminated soils
Journal of geochemical exploration, Vol.182, pp.247-268
11/2017
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Abstract
Soil contamination with persistent and potentially (eco)toxic heavy metal(loid)s is ubiquitous around the globe. Concentration of these heavy metal(loid)s in soil has increased drastically over the last three decades, thus posing risk to the environment and human health. Some technologies have long been in use to remediate the hazardous heavy metal(loid)s. Conventional remediation methods for heavy metal(loid)s are generally based on physical, chemical and biological approaches, which may be used in combination with one another to clean-up heavy metal(loid) contaminated soils to an acceptable and safe level. This review summarizes the soil contamination by heavy metal(loid)s at a global scale, accumulation of heavy metal(loid)s in vegetables to toxic levels and their regulatory guidelines in soil. In this review, we also elucidate and compare the pool of available technologies that are currently being applied for remediation of heavy metal(loid) contaminated soils, as well as the economic aspect of soil remediation for different techniques. This review article includes an assessment of the contemporary status of technology deployment and recommendations for future remediation research. Finally, the molecular and genetic basis of heavy metal(loid) (hyper)accumulation and tolerance in microbes and plants is also discussed. It is proposed that for effective and economic remediation of soil, a better understanding of remediation procedures and the various options available at the different stages of remediation is highly necessary.
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•Soil heavy metal contamination is ubiquitous around the globe.•Bioremediation is more economical & eco-friendly than physical & chemical methods.•Combined remediation is the most effective and economical at large scale.•Microbial assisted genetically modified plants have high future perspectives.
Details
- Title
- A comparison of technologies for remediation of heavy metal contaminated soils
- Creators
- Sana Khalid - Department of Environmental Sciences, COMSATS Institute of Information Technology, Vehari 61100, PakistanMuhammad Shahid - Department of Environmental Sciences, COMSATS Institute of Information Technology, Vehari 61100, PakistanNabeel Khan Niazi - Southern Cross UniversityBehzad Murtaza - Department of Environmental Sciences, COMSATS Institute of Information Technology, Vehari 61100, PakistanIrshad Bibi - Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad, Faisalabad 38040, PakistanCamille Dumat - Centre d'Etude et de Recherche Travail Organisation Pouvoir (CERTOP), UMR5044, Université J. Jaurès - Toulouse II, 5 allée Antonio Machado, 31058 Toulouse Cedex 9, France
- Publication Details
- Journal of geochemical exploration, Vol.182, pp.247-268
- Publisher
- Elsevier B.V
- Identifiers
- 991012927091902368
- Academic Unit
- Southern Cross GeoScience; Faculty of Science and Engineering
- Language
- English
- Resource Type
- Journal article