Bioremediation of toxic substances by mercury resistant marine bacteria

J, De; Sarkar, A.; Ramaiah, N.

doi:10.1007/s10646-006-0066-4

Cited by 37 publications

(7 citation statements)

References 20 publications

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“…In this context, microbial bioremediation seems a potential approach because of low cost and better efficiency at low metal concentration (Wagner-Döbler 2003). Many attempts have been made to exploit the living (Bafana et al 2010;Barkay and Wagner-Döbler 2005;De et al 2006;Pepi et al 2011), dead (Das et al 2007;GreenRuiz 2006;Sari and Tuzen 2009) and immobilized microbial cells (Bayramoglu et al 2006;Chen et al 2005;Oehmen et al 2009;Sugio et al 2003) to remediate mercury. Yet, the unique property of mercury to enter into vapor stage at room temperature (from Hg 2?…”

Section: Introductionmentioning

confidence: 99%

Mercury bioremediation by mercury accumulating Enterobacter sp. cells and its alginate immobilized application

Sinha

Khare

2011

Biodegradation

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The effective microbial remediation of the mercury necessitates the mercury to be trapped within the cells without being recycled back to the environment. The study describes a mercury bioaccumulating strain of Enterobacter sp., which remediated mercury from the medium simultaneous to its growth. The transmission electron micrographs and electron dispersive X-ray analysis revealed the accumulation of remediated mercury as nano-size particles in the cytoplasm as well as on the cell wall. The Enterobacter sp. in the present work was able to accumulate mercury, without being engineered in its native form. The possibility of recovering the accumulated mercury from the cells is also indicated. The applicability of the alginate immobilized cells in removing mercury from synthetic and complex industrial effluent in a batch mode was amply demonstrated. The initial load of 7.3 mg l(-1) mercury in the industrial effluent was completely removed in 72 h. The cells immobilized in calcium alginate were similarly effective in the complete removal of 5 mg l(-1) HgCl(2) of mercury from the synthetic effluent in less than 72 h. The immobilized cells could be reused for multiple cycles.

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Section: Introductionmentioning

confidence: 99%

Mercury bioremediation by mercury accumulating Enterobacter sp. cells and its alginate immobilized application

Sinha

Khare

2011

Biodegradation

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“…This culture was able to remove over 70% Cd from growing media when supplemented with 100 ppm Cd. [13]. Other strains of P. aeruginosa, namely, isolate CH07 and isolate Bro12 from marine sediment successful run more than one month, the bioreactors are able to retain the toxic metal, which resulted recovery of approximately 64% from mercury influent.…”

Section: Resultsmentioning

confidence: 99%

The Role of Coenzymes on Mercury (Hg2+) Bioremediation by Isolates Pseudomonas aeruginosa KHY2 and Klebsiella pneumonia KHY3

Neneng

Gunawan

2018

J.Trop.Life.Science

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Mercury pollution is dangerous to health. Previous research was found two potential Gram-negative bacteria for mercury bioremediation, from gold mining in Central Kalimantan, Indonesia. These isolates were identified as Pseudomonas aeruginosa KHY2 and Klebsiella pneumonia KHY3. Mechanisms of mercury bioremediation had not known yet by these isolates. This study purposed to test the role of coenzymes on mercury bioremediation by these isolate and to determine the coenzymes best level of mercury bioremediation. Experimental design was Completely Randomized Design in a laboratory. Treatment factors were coenzymes obtained from vitamins B1, B6, B12, with 6 levels of treatments, included 1 control. All treatments were done in Luria Broth media that contain 12 ppm of mercury. Mercury was measured by AAS Shimadzu AA-6200. The results showed that coenzymes effect was very significant to improve mercury bioremediation by P. aeruginosa KHY2 and K. pneumonia KHY3. Supplementation of vitamin B12 in culture media, more enhance of mercury bioremediation compared with vitamin B1 and B6. These result above, indicated the mechanism of mercury bioremediation in both isolates, were the enzymatic process.

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“…A major worldwide environmental issue is the introduction of persistent toxic substances, including heavy metals into our environment [22][23][24]. Of the metals present in fish farm sediments, elevated concentrations of zinc and copper have been reported in Scotland (Saving seabirds and conserving fish stocks-restrictions on industrial fishing: http:// www.scotland.gov.uk/news/1999/12/se1670.asp, accessed 13 June 2006), Canada [25] and USA [26].…”

Section: Discussionmentioning

confidence: 99%

Occurrence of heavy metals in the sediments of Uranouchi Inlet, Kochi prefecture, Japan

Fukami

Iwasaki

et al. 2009

Fish Sci

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The present status of contamination by heavy metals, and the impact of cage culture on sediments at the Uranouchi Inlet, Kochi Prefecture, Japan, were investigated from two stations influenced by intensive aquaculture and a control station, during May-July 2006. The moisture content of the sediments at the aquaculture stations was over 65%, and the organic matter was always over 100 mg/g dry wt. In contrast, the highest moisture content and organic matter at the control station was 45.5% and 62.9 mg/g dry wt, respectively. Concentrations of zinc (Zn) (178 ± 4.8 mg/kg dry wt) and copper (Cu) (125 ± 1.2 mg/kg dry wt) were highest at the aquaculture stations. Lead (Pb) was highest (50.7 ± 0.77 mg/kg dry wt) at the aquaculture station though it was as high as 33.2 ± 0.77 mg/kg dry wt at the control station. One-way ANOVA showed that the differences in concentrations of Zn and Cu in sediments from the aquaculture and control stations were highly significant (P = 0.01), whereas Pb showed no such trend. Occurrence of a large fraction of labile Zn (56.1%) and Cu (40.3%) in these sediments warrants attention. Although factors other than metals may explain the distribution observed, the information presented here may be useful in predicting long-term effects of heavy metal contamination from aquaculture in the marine environment.

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Bioremediation of toxic substances by mercury resistant marine bacteria

Cited by 37 publications

References 20 publications

Mercury bioremediation by mercury accumulating Enterobacter sp. cells and its alginate immobilized application

Mercury bioremediation by mercury accumulating Enterobacter sp. cells and its alginate immobilized application

The Role of Coenzymes on Mercury (Hg2+) Bioremediation by Isolates Pseudomonas aeruginosa KHY2 and Klebsiella pneumonia KHY3

Occurrence of heavy metals in the sediments of Uranouchi Inlet, Kochi prefecture, Japan

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