Critical review on microbial community during in-situ bioremediation of heavy metals from industrial wastewater

Author(s):  
Pooja Sharma ◽  
Ashutosh Kumar Pandey ◽  
Sang-Hyoun Kim ◽  
Surendra Pratap Singh ◽  
Preeti Chaturvedi ◽  
...  
2012 ◽  
Vol 485 ◽  
pp. 438-441
Author(s):  
Chao Li ◽  
Xian Li Li ◽  
Min Ji ◽  
Yu Kun Ma

To reveal the succession procedure of microbial community in hybrid biological reactor (HBR), the molecular biological techniques of polymerase chain reaction-denaturing gel gradient electrophoresis (PCR-DGGE), cloning and sequencing and fluorescence in situ hybridization (FISH) were applied. PCR-DGGE results showed that the microbial community accumulated in both suspended-growth and attached-growth biomasses. Proteobacteria was found to be the dominant genera of bacteria in the sludge. Denitrifying bacteria was found accumulated in the biofilms. FISH results showed that there were more nitrifying bacteria in the suspended-growth biomass than the attached-growth biomass, but less denitrifying bacteria in the former biomass.


2015 ◽  
Vol 1130 ◽  
pp. 551-554 ◽  
Author(s):  
Malin Bomberg ◽  
Mona Arnold ◽  
Päivi Kinnunen

Heavy metals, e.g. copper and nickel, are released to the environment as a result of mining activities. Heavy metals are required by most living organisms as trace elements, but in excess they are toxic and cause considerable environmental stress. Microbes have developed different strategies to tolerate otherwise toxic conditions. In the surroundings of closed Kotalahti Mine the concentrations of copper and nickel in the water have earlier been highly elevated. In order to decrease the concentrations of heavy metals and increase water pH, manure sludge was added to the flooded mine pit. Thisin situbioreactor has operated successfully for 15 years after the treatment. The current concentrations of heavy metals are generally low. Nevertheless, resistance genes for copper (copA), cadmium-nickel (cnrA), nickel-cadmium-cobalt (nccA) and cadmium-zink (czcA) could still be found in the microbial community of the flooding water.


2021 ◽  
Vol 326 ◽  
pp. 124750 ◽  
Author(s):  
Pooja Sharma ◽  
Ashutosh Kumar Pandey ◽  
Aswathy Udayan ◽  
Sunil Kumar

2010 ◽  
Vol 4 (8) ◽  
pp. 1060-1070 ◽  
Author(s):  
Meiying Xu ◽  
Wei-Min Wu ◽  
Liyou Wu ◽  
Zhili He ◽  
Joy D Van Nostrand ◽  
...  

2018 ◽  
Vol 9 ◽  
Author(s):  
Alexey V. Safonov ◽  
Tamara L. Babich ◽  
Diyana S. Sokolova ◽  
Denis S. Grouzdev ◽  
Tatiyana P. Tourova ◽  
...  

2014 ◽  
Vol 94 (4) ◽  
pp. 543-549 ◽  
Author(s):  
Muhammad Irshad ◽  
Rahat Ullah Khan ◽  
Saima Jadoon ◽  
Amjad Hassan ◽  
A. Egrinya Eneji

Irshad, M., Khan, R. U., Jadoon, S., Hassan, A. and Egrinya Eneji, A. 2014. Effect of phosphate rock on the solubility of heavy metals in soils saturated with industrial wastewater. Can. J. Soil Sci. 94: 543–549. An in situ technology for immobilizing metals in polluted soils could be a more effective approach to managing their toxicity to the environment, especially plants. The aim of this study was to investigate the effect of milled phosphate rock (PR) on the sorption of Ni, Cd and Cu ions in differently textured soils polluted with industrial wastewater. For this purpose, soils were mixed with two particle size fractions (0.2 mm and 1 mm) of PR material. Each material was applied at the rate of 0, 2.5 and 5%. Results showed that PR amendment reduced the solubilization of heavy metals in the order sandy clay loam>sandy loam>loamy sand. Metal concentrations in soils saturated with industrial wastewater were in the order Ni>Cd>Cu. Solubilization of metal ions in soils also reduced with the increase in the amount of rock phosphate added. This occurred more with the finer PR fraction. The concentrations of heavy metals in soils varied directly with their respective concentrations in the wastewater. Saturating soil with wastewater for a longer time increased the solubility of heavy metals. The adsorptive capacity of heavy metals from the respective aqueous solution also increased with increasing shaking time. The finer PR particles better enhanced the sorption capacity of heavy metals. This study indicated that the retention of heavy metals by PR mineral in contaminated soils may reduce the contamination risk in surface and subsurface waters.


2006 ◽  
Vol 14 (2) ◽  
pp. 478-482
Author(s):  
Jamie Robinson ◽  
Russell Thomas ◽  
Steve Wallace ◽  
Paddy Daly ◽  
Robert Kalin

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