Efficacy of biocementation of lead mine waste from the Kabwe Mine site evaluated using Pararhodobacter sp.

Mwandira, Wilson; Nakashima, Kazunori; Kawasaki, Satoru; Ito, Mayumi; Satō, Tsutomu; Igarashi, Toshifumi; Banda, Kawawa; Chirwa, Meki; Nyambe, Imasiku; Nakayama, Shouta M.M.; Ishizuka, Mayumi

doi:10.1007/s11356-019-04984-8

Cited by 23 publications

(9 citation statements)

References 33 publications

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“…Cementation studies with Pararhodobacter sp. on Zn leach plant residue and kiln slag from the Kabwe mine was demonstrated by Mwandira et al (2019a). Calcium carbonate precipitation by this microorganism was found to reduce the Pb concentration in leachate to below the detection limit (0.001 mg / L).…”

Section: Environmental Remediation Techniquesmentioning

confidence: 95%

Interdisciplinary approach to addressing lead pollution caused by mining activity in Kabwe, The Republic of Zambia

Nakata

Nakayama

Yabe

et al. 2022

EMCR

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Industrial development and economic growth have made human life more convenient. However, the accompanying environmental pollution is a serious problem. The same situation that developed countries have experienced in the past is now being repeated in developing countries, especially in Asia and Africa. Although lead has long been a useful metal in supporting human life, it is highly toxic to living organisms and affects various biological functions, including the kidneys and nervous system. Lead is one of the substances symbolizing the tradeoff between industrial and economic development and environmental pollution. Kabwe in the Republic of Zambia, a town that grew out of the discovery and development of lead-zinc deposits, is now known as one of the most lead-polluted areas in the world. While Kabwe is a classic example of the trade-off described above, it is distinct from other polluted areas in that it has been the site of diverse academic research. These include geological survey of the mine, the characterization of mine wastes, monitoring of environmental and animal samples, human health impact studies, understanding of lead dispersion pathways, and development of remediation technologies for contaminated environments. In environmental monitoring, several studies have reported lead concentrations in soil of up to tens of thousands of mg / kg, and lead concentrations in crops exceed international standards by up to 770 times. Extremely high concentrations of lead have also been detected in wildlife, livestock, and humans. Various toxicological studies have been conducted on humans in particular. These studies reveal the contamination status and its effects. However, the elucidation of the diffusion pathways and the development of environmental remediation methods using materials that can be procured locally at low cost pave the way to solving the problem. This review comprehensively outlines these studies in chronological order, as well as the efforts of the Zambian government and future perspectives. This report also provides some guidance on how to promote academic research and problem solving in other polluted areas.

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Section: Environmental Remediation Techniquesmentioning

confidence: 95%

Interdisciplinary approach to addressing lead pollution caused by mining activity in Kabwe, The Republic of Zambia

Nakata

Nakayama

Yabe

et al. 2022

EMCR

Self Cite

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“…The reduction in leachate is often assessed through the decrease in the soluble–exchangeable fraction, which indicates contaminant bioavailability and mobility [ 18 , 22 , 34 , 35 , 36 ]. Leachate is also reduced by the surface deposition and clogging of pore spaces via CaCO 3 crystals [ 21 , 37 ]. The development of the biocement matrix will create an impermeable barrier by establishing a plugging effect [ 38 , 39 ].…”

Section: Bioremediation Processes—geophysical and Biochemical Interac...mentioning

confidence: 99%

“…[ 22 , 47 , 48 , 49 ]. This crust can decrease water absorption and permeability through the specimen [ 48 , 50 ], reducing metal(loid)-contaminated leachate [ 21 , 37 ]. The precipitation of CaCO 3 crystals within the pore spaces will also decrease permeability, while simultaneously increasing strength [ 22 , 50 ].…”

Section: Bioremediation Processes—geophysical and Biochemical Interac...mentioning

confidence: 99%

“…The main indicators to assess the efficacy of MICP as a bioremediation technique for mining waste are strength (i.e., mechanical strength, slaking behavior, and water absorption) and leach resistance (i.e., pH, mineralogy, and hydraulic conductivity) [ 37 , 55 ]. Table 3 defines indicators and tests that can be used to assess CaCO 3 precipitation and its applicability as a remediation technique.…”

Section: Bioremediation Processes—geophysical and Biochemical Interac...mentioning

confidence: 99%

“…A thorough approach to analyze the bioremediation of MICP-treated mining waste has been completed [ 37 ]. The experiment tested unconfined compressive strength (UCS), water absorption, slaking behavior, hydraulic conductivity, and leachability.…”

Section: Bioremediation Processes—geophysical and Biochemical Interac...mentioning

confidence: 99%

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Mining waste represents a global issue due to its potential of generating acidic or alkaline leachate with high concentrations of metals and metalloids (metal(loid)s). Microbial-induced calcium carbonate precipitation (MICP) is an engineering tool used for remediation. MICP, induced via biological activity, aims to precipitate calcium carbonate (CaCO3) or co-precipitate other metal carbonates (MCO3). MICP is a bio-geochemical remediation method that aims to immobilize or remove metal(loid)s via enzyme, redox, or photosynthetic metabolic pathways. Contaminants are removed directly through immobilization as mineral precipitates (CaCO3 or MCO3), or indirectly (via sorption, complexes, or inclusion into the crystal structure). Further, CaCO3 precipitates deposited on the surface or within the pore spaces of a solid matrix create a clogging effect to reduce contaminant leachate. Experimental research on MICP has shown its promise as a bioremediation technique for mining waste. Additional research is required to evaluate the long-term feasibility and potential by-products of MICP-treated/stabilized waste.

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Efficacy of biocementation of lead mine waste from the Kabwe Mine site evaluated using Pararhodobacter sp.

Cited by 23 publications

References 33 publications

Interdisciplinary approach to addressing lead pollution caused by mining activity in Kabwe, The Republic of Zambia

Interdisciplinary approach to addressing lead pollution caused by mining activity in Kabwe, The Republic of Zambia

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A review of the use of bio-based substances in soil stabilization

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