Global Situation of Bioremediation of Leachate-Contaminated Soils by Treatment with Microorganisms: A Systematic Review

Abstract

This systematic review presents the current state of research in the last five years on contaminants in soils, especially in leachates from solid waste landfills, with emphasis on biological remediation. In this work, the pollutants that can be treated by microorganisms and the results obtained worldwide were studied. All the data obtained were compiled, integrated, and analyzed by soil type, pollutant type, bacterial type, and the countries where these studies were carried out. This review provides reliable data on the contamination of soils worldwide, especially soils contaminated by leachate from municipal landfills. The extent of contamination, treatment objectives, site characteristics, cost, type of microorganisms to be used, and time must be considered when selecting a viable remediation strategy. The results of this study can help develop innovative and applicable methods for evaluating the overall contamination of soil with different contaminants and soil types. These findings can help develop innovative, applicable, and economically feasible methods for the sustainable management of contaminated soils, whether from landfill leachate or other soil types, to reduce or eliminate risk to the environment and human health, and to achieve greater greenery and functionality on the planet.

Soil Contamination by Heavy Metals and Radionuclides and Related Bioremediation Techniques: A Review

“…[ [77][78][79][80][81][82][83] Biosorption This is a physicochemical and metabolically independent process that relies on various mechanisms, including absorption, adsorption, ion exchange, surface complexation, and precipitation.…”

“…The use of additional sulphate nutrition can enhance the rate of biotransformation in aerobic microbes. [78,85,[106][107][108][109][110][111] Bioremediation-based processes can be considered a promising area based on the transformation of heavy metals and radionuclides into a less dangerous state and, at the same time, provide sustainable restoration of the environment. Thus, as part of the study of transformations of metals such as Pb, Zn, and Cd by Thakare et al, a number of regularities were identified.…”

“…In general, the following types of microorganisms are used in the bioremediation methodology [78]: Bacillus sp., Lysinibacillus sp., Rhodococcus sp., Ascomycota, Basidiomycota, Perenniporia subtephropora, Daldinia starbaeckii, Phanerochaete concrescens, etc.…”

Remediation of Leachate-Metal-Contaminated Soil Using Selected Bacterial Consortia

“…Leachate pollutes the soil as it flows through it and simultaneously poses a threat to vegetation along its course. In unsaturated soil, this migration typically occurs vertically; however, in saturated soil or above an impermeable layer of soil, leachate migrates horizontally [5].…”

Assessment of Landfills and their Impact on the Soil: a Local Study in Ukraine

“…According to the analysis of the literary sources (Vasudevan et al 2003, Kim et al 2010, Ren et al 2021, Travar et al 2020, Marsum et al 2022, Mendoza-Burguete et al 2023, the methods of remediation of technogenic disturbed areas can be divided into three groups: technical or radical (complete extraction of polluted soil layer and its replacement with "clean" one that has undergone special treatment); biological (use of plant properties to neutralise pollutants); microbiological; physical and chemical (washing contaminated soil, changing soil acidity, etc. ).…”