Related Experiment Video
Updated: May 31, 2026
05:52
Deployment and Retrieval of Mineral Samplers
Published on: January 20, 2026
Remediation technologies for heavy metal contaminated groundwater
M A Hashim1, Soumyadeep Mukhopadhyay, Jaya Narayan Sahu
1Department of Chemical Engineering, University of Malaya, Pantai Valley, 50603 Kuala Lumpur, Malaysia. alihashim@um.edu.my
Journal of Environmental Management
|June 29, 2011
Summary
Groundwater contamination from heavy metals poses a significant public health risk. This review classifies 35 treatment methods, recommending sustainable approaches like bioremediation and biosorption for effective groundwater remediation.
Area of Science:
- Environmental Science
- Water Treatment Technologies
Background:
- Groundwater contamination by heavy metals, from natural or anthropogenic sources, is a critical public health concern.
- Billions rely on groundwater for drinking, making its remediation a global priority.
Purpose of the Study:
- To review and classify 35 different groundwater treatment approaches.
- To provide a comparative understanding of chemical, biochemical/biological/biosorption, and physico-chemical treatment processes.
Main Methods:
- A comprehensive review of 35 groundwater treatment technologies.
- Classification of methods into chemical, biochemical/biological/biosorption, and physico-chemical categories.
- Provision of comparison tables for each process category.
Main Results:
- Identified iron-based technologies, microbial remediation, biological sulfate reduction, and adsorbents as effective in recent years.
- Highlighted the complexity of selecting site-specific remediation technologies due to soil and aquifer characteristics.
Conclusions:
- Recommends sustainable technologies like natural chemistry, bioremediation, and biosorption for appropriate cases.
- Suggests synergistic application of multiple techniques for enhanced results.
- Advises chelate extraction and chemical soil washing only for specific industrial metal recovery scenarios based on economic feasibility.
Related Concept Videos
01:25Microbial Bioremediation of Uranium
Microorganisms play a critical role in the transformation and immobilization of uranium in contaminated environments through four main pathways: bioreduction, biosorption, bioaccumulation, and biomineralization. These mechanisms reduce uranium’s toxicity and prevent its migration through groundwater systems, offering sustainable approaches for in situ bioremediation.Bioreduction of UraniumBioreduction is driven by anaerobic bacteria such as certain strains of Geobacter and Shewanella, which use...
00:46Bioremediation
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
01:30Microbial Wastewater Treatment
Microbial communities in aquatic ecosystems play a key role in the natural breakdown of contaminants introduced through domestic and industrial effluents. Acting as biological catalysts, these microbes change and mineralize a wide range of organic and inorganic pollutants under different redox conditions.In oxygen-rich surface waters, aerobic heterotrophs lead organic matter breakdown, using oxygen as the terminal electron acceptor to efficiently oxidize substrates to carbon dioxide and water.
01:27Microbial Leaching
Microbial leaching, also known as bioleaching, is an environmentally favorable method for extracting metals from low-grade ores using specific microorganisms. This biotechnological approach is particularly valuable for mining operations targeting copper, gold, and uranium, where traditional extraction methods may be economically or environmentally impractical.Copper Leaching and Microbial CatalysisIn copper bioleaching, crushed ore is arranged into heaps and irrigated with a dilute sulfuric...
01:26Microbial Bioremediation of Hydrocarbons
Bioremediation is an environmentally sustainable process that employs living organisms—primarily microorganisms—to degrade or neutralize pollutants from contaminated environments. In oil spills and hydrocarbon pollution, bioremediation involves the use of hydrocarbon-degrading bacteria to transform toxic compounds into less harmful substances. This approach leverages natural microbial metabolic processes and is considered both cost-effective and ecologically favorable compared to physical or...
01:28Microbial Bioremediation of Pesticides
Pesticides often feature structurally complex chemical architectures, incorporating halogen groups and multiple aromatic rings. These characteristics confer high chemical stability, rendering many pesticides resistant to natural degradation processes. This resistance poses significant environmental concerns, as persistent pesticide residues can accumulate in ecosystems and affect non-target organisms.Despite the inherent stability of many pesticides, certain microorganisms possess the metabolic...