Toxicity and Bioremediation of Heavy Metals Contaminated Ecosystem from Tannery Wastewater: A Review

By B. Igiri, S. Okoduwa, Grace O Idoko, E. P. Akabuogu, A. O. Adeyi, I. K. Ejiogu. Journal of Toxicology, 2018

725 citations recorded by the source corpus.

The discharge of untreated tannery wastewater containing biotoxic substances of heavy metals in the ecosystem is one of the most important environmental and health challenges in our society. Hence, there is a growing need for the development of novel, efficient, eco-friendly, and cost-effective approach for the remediation of inorganic metals (Cr, Hg, Cd, and Pb) released into the environment and to safeguard the ecosystem. In this regard, recent advances in microbes-base heavy metal have propelled bioremediation as a prospective alternative to conventional techniques. Heavy metals are nonbiodegradable and could be toxic to microbes. Several microorganisms have evolved to develop detoxification mechanisms to counter the toxic effects of these inorganic metals. This present review offers a critical evaluation of bioremediation capacity of microorganisms, especially in the context of environmental protection. Furthermore, this article discussed the biosorption capacity with respect to the use of bacteria, fungi, biofilm, algae, genetically engineered microbes, and immobilized microbial cell for the removal of heavy metals. The use of biofilm has showed synergetic effects with many fold increase in the removal of heavy metals as sustainable environmental technology in the near future.

Subfields: Health, Toxicology and Mutagenesis, Water Science and Technology

View Paper: https://www.semanticscholar.org/paper/70460a7cd319cf27946d95b5cfd9174f82667316

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Citations in the corpus

• Arbuscular Mycorrhizal Fungi as Potential Agents in Ameliorating Heavy Metal Stress in Plants (2020, background): “They also result in the production of free radicals such as hydrogen peroxide (H2O2), superoxide radical (O2−) and hydroxyl radical (•OH), which further react with cellular organelles and cause damage to the cell and DNA, inhibit ATP (adenosine triphosphate) production and cause lipid peroxidation [”
• Microbes used as a tool for bioremediation of heavy metal from the environment (2020, background): “Heavy metals are of economic significance in industrial use and currently become a significant environmental problem throughout the whole world (Igiri et al., 2018; Siddiquee et al., 2015).”
• Heavy metal remediation and resistance mechanism of Aeromonas, Bacillus, and Pseudomonas: A review (2020, background): “For example, Bacillus spp. and Pseudomonas spp. have the potential to perform methylation of mercury (Hg2þ) to convert it to the gaseous form of methyl Hg (Igiri et al., 2018).”
• Microbial Biodiversity and Bioremediation Assessment Through Omics Approaches (2020, background): “They also undergo a rapid genetic transformation which enables them to acquire new metabolic routes for deterioration of xenobiotics (Poirier et al., 2013; Igiri et al., 2018).”