Strategies to maximize the microbial leaching of lead from metal-contaminated aquatic sediments

Mercier, Guy; Chartier, Myriam; Couillard, Denis

doi:10.1016/0043-1354(96)00118-2

Cited by 29 publications

(17 citation statements)

References 23 publications

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“…Chen and Lin (2004) and Chartier and Couillard (1997) have also reported a similar trend for lead while working on bioleaching heavy metals from contaminated sediments by sulfur oxidizing bacteria and A. ferrooxidans, respectively. The reason for low solubility of lead during bioleaching is attributed to its tendency to form a less soluble compound (lead sulfate) with sulfate produced during oxidation of elemental sulfur (Mercier et al 1996). Figure 5 shows zinc solubilization from soil during bioleaching.…”

Section: Heavy Metal Solubilization During Bioleachingmentioning

confidence: 98%

Bioleaching of heavy metals from contaminated soil using Acidithiobacillus thiooxidans: effect of sulfur/soil ratio

Nareshkumar

Nagendran

Parvathi

2007

World J Microbiol Biotechnol

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Bioleaching of heavy metals from contaminated soil was carried out using indigenous sulfur oxidizing bacterium Acidithiobacillus thiooxidans. Experiments were carried out by varying sulfur/soil ratio from 0.03 to 0.33 to evaluate the optimum ratio for efficient bioleaching of heavy metals from soil. The influence of sulfur/soil ratio on the bioleaching efficiency was assessed based on decrease in pH, increase in oxidation-reduction potential, sulfate production and solubilization of heavy metals from the soil. Decrease in pH, increase in oxidation-reduction potential and sulfate production was found to be better with the increase in sulfur/soil ratio. While the final pH of the system with different sulfur/soil ratio was in the range of 4.1-0.7, oxidation reduction potential varied from 230 to 629 mV; sulfate production was in the range of 2,786-8,872 mg/l. Solubilization of chromium, zinc, copper, lead and cadmium from the contaminated soil was in the range of 11-99%. Findings of the study will help to optimize the ratio of sulfur/soil to achieve effective bioleaching of heavy metals from contaminated soils.

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Section: Heavy Metal Solubilization During Bioleachingmentioning

confidence: 98%

Bioleaching of heavy metals from contaminated soil using Acidithiobacillus thiooxidans: effect of sulfur/soil ratio

Nareshkumar

Nagendran

Parvathi

2007

World J Microbiol Biotechnol

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“…Both Wong and Henry (1983) and Blais et al (1992b) reported significantly higher cadmium solubilization (80%) than Ni solubilization from the same sludge samples. Mercier et al (1996) reported that microbial leaching processes were capable of solubilizing 80% Cd, 73% Cu, and 90% Cu from heavily contaminated sediments.…”

Section: Comparison Between Bioleaching and Acid Leachingmentioning

confidence: 99%

“…To avoid nutrient limitations, the leaching reactors also contained the following nutrient concentrations: (NH 4 ) 2 SO 4 , 3 g/L -1 ; KH 2 PO 4 , 0.5 g/L -1 ; MgSO 4 , 0.5 g/L -1 ; Ca(NO 3 ) 2 , 0.01 g/L -1 ; KCl, 0.1 g/L -1 ; FeCl 2 , 37.0 g/L -1 ). Ferrous chloride (FeCl 2 ) as a substrate was used to avoid the generation of jarosite with yellow precipitates due to sulfate (Mercier et al 1996). Oxygen and carbon dioxide were supplied by aeration at a rate of 50-100 cm 3 /L of medium/ min and the contents of each reactor were mixed with a magnetic stirrer at 100 rpm.…”

Section: Solubilizationmentioning

confidence: 99%

“…Bioleaching technology was originally developed by the mining industry for the recovery of minerals from low quality ores (Torma & Itzkovitch 1976;Konishi et al 1992). Moreover, microbial leaching has been successfully applied to anaerobically digested municipal sludges (Wong & Henry 1984;Tyagi & Couillard 1989;Ravishankar et al 1994) and contaminated sediments (Mercier et al 1996;Seidel et al 1998;Chen & Lin, 2001;Tsai et al 2003). One of the principal microorganisms involved in bioleaching is Acidithiobacillus ferroxidans (formerly Thiobacillus ferrooxidans) (Kelly & Wood 2000;Kinzler et al 2003), a chemoautotrophic bacterium which can grow by oxidizing both reduced sulfur compounds and ferrous iron in a pH range of 1.5-3 (Torma & Itzkovitch 1976;Wong & Henry 1983).…”

Section: Introductionmentioning

confidence: 99%

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Bioleaching of cadmium and nickel from synthetic sediments by Acidithiobacillus ferrooxidans

Kim

Baeb

Chiu

et al. 2005

Environ Geochem Health

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The microbial leaching process was evaluated for the treatment of synthetic sediments contaminated with cadmium and nickel sulfides. A series of batch leaching experiments was conducted to compare metal solubilization in sediment inoculated with Acidithiobacillus ferrooxidans -inoculated sediments to that in sterile control sediment. The rate and extent of metal solubilization were significantly higher in A. ferrooxidans -inoculated reactors than in acidified sterile reactors. The efficiency of cadmium (Cd) solubilization (80) in the bioleaching process was higher than that of nickel (Ni) solubilization (60). The performance of leaching reactors containing only culture supernatants was comparable to that of A. ferrooxidans -inoculated reactors, indicating that indirect non-contact leaching by the products of microbial metabolism is the predominant mechanism for metal solubilization rather than direct microbial sulfide oxidation. Moreover, the similar (60-75%) extents of Cd(2+) leaching with A. ferrooxidans , cell-free filtrate, and Fe(3+) suggest that abiotic oxidation of CdS by Fe(3+) controls the overall leaching rate, and the role of A. ferrooxidans is most likely not to oxidize CdS mineral directly but to regenerate Fe(3+) as an oxidant.

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“…The bacterial population adapted well to the FeCl, but not to the substitution of HCl for H 2 SO 4 in initial acidification of the system, due to either chloride intolerance or to a sulfate requirement. Further research is needed to optimize lead solublization by these methods, but the leaching technique for the other metals appears ready for implementation (Mercier et al 1996).…”

Section: Microbial Leachingmentioning

confidence: 99%

Developments in Bioremediation of Soils and Sediments Polluted with Metals and Radionuclides – 1. Microbial Processes and Mechanisms Affecting Bioremediation of Metal Contamination and Influencing Metal Toxicity and Transport

Tabak

Lens

Hullebusch

et al. 2005

Rev Environ Sci Biotechnol

197

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Strategies to maximize the microbial leaching of lead from metal-contaminated aquatic sediments

Cited by 29 publications

References 23 publications

Bioleaching of heavy metals from contaminated soil using Acidithiobacillus thiooxidans: effect of sulfur/soil ratio

Bioleaching of heavy metals from contaminated soil using Acidithiobacillus thiooxidans: effect of sulfur/soil ratio

Bioleaching of cadmium and nickel from synthetic sediments by Acidithiobacillus ferrooxidans

Developments in Bioremediation of Soils and Sediments Polluted with Metals and Radionuclides – 1. Microbial Processes and Mechanisms Affecting Bioremediation of Metal Contamination and Influencing Metal Toxicity and Transport

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