An Acrylamide-degrading Bacterial Consortium Isolated from Volcanic Soi

In soil, polyacrylamide is a key source of acrylamide because it slowly decomposes into acrylamide. There has been a modest but steady rise in worldwide interest in microbe-mediated acrylamide decomposition as a bioremediation method. A bacterial consortium isolated from the volcanic soil of Mount Marapi, West Sumatra, Indonesia, was able to thrive on acrylamide in this study. Acrylamide-degrading bacteria grew best in the presence of 1 %(w/v) glucose with acrylamide as the sole nitrogen source. Optimum growth occurs in between 300 and 500 mg/L of acrylamide, pH between 6.5 and 8.0, and temperatures between 30 and 35 °C. The consortium can also grow on acetamide as the sole nitrogen source. Toxic heavy metals, such as mercury, silver and copper slowed down the growth of this consortium on acrylamide. This is the first report of an acrylamide-degrading consortium isolated from volcanic soils.

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Preparation of a bioflocculant by using acetonitrile as sole nitrogen source and its application in heavy metals removal

Journal of Hazardous Materials ◽

10.1016/j.jhazmat.2018.09.063 ◽

2019 ◽

Vol 363 ◽

pp. 242-247 ◽

Cited By ~ 13

Author(s):

Hong-cheng Fan ◽

Jing Yu ◽

Rong-ping Chen ◽

Lei Yu

Keyword(s):

Heavy Metals ◽

Nitrogen Source ◽

Sole Nitrogen Source ◽

Heavy Metals Removal ◽

Metals Removal

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Metabolism of trinitrobenzene by a Pseudomonas consortium

Canadian Journal of Microbiology ◽

10.1139/m94-124 ◽

1994 ◽

Vol 40 (9) ◽

pp. 787-790 ◽

Cited By ~ 12

Author(s):

Ramaraj Boopathy ◽

John Manning ◽

Carlo Montemagno ◽

Kris Rimkus

Keyword(s):

Nitrogen Source ◽

Culture System ◽

Culture Medium ◽

Sole Source ◽

Bacterial Consortium ◽

Ammonia Concentration ◽

Amino Compound ◽

Nitroaromatic Compound ◽

Degrading Bacteria ◽

Soil And Water

The metabolism of trinitrobenzene by a Pseudomonas consortium was studied. The Pseudomonas consortium used trinitrobenzene as a sole source of nitrogen, but not as a sole source of carbon. Trinitrobenzene was metabolized within 60 h of incubation. The main intermediates produced were dinitroaniline, 1,5-dinitrobenzene, nitroaniline, 5-nitrobenzene, and ammonia. The ammonia concentration in the culture medium increased during the course of incubation. Nearly stoichiometric amounts of 1,5-dinitrobenzene and 5-nitrobenzene were produced by the consortium. During trinitrobenzene metabolism by this bacterial consortium, the trinitrobenzene was first reduced to an amino compound, dinitroaniline. This intermediate was reductively deaminated with the release of ammonia into the culture medium and production of 1,5-dinitrobenzene. By the same mechanism, 1,5-dinitrobenzene was further converted to 5-nitrobenzene, which was not metabolized further, even after 60 days of incubation. This pathway is believed to be novel in that an aerobic bacterial consortium uses the nitroaromatic compound as its nitrogen source but leaves the ring intact. The bacterial consortium studied could be used in a syntrophic culture system with other 5-nitrobenzene-degrading bacteria to remove trinitrobenzene completely from soil and water at contaminated sites.Key words: trinitrobenzene, aniline, nitrobenzene, biodegradation, transformation.

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KONSORSIA BAKTERI PENGURAI SIANIDA YANG DI ISOLASI DARI BUANGAN INDUSTRI PENGOLAHAN EMAS

Jurnal Teknologi Lingkungan ◽

10.29122/jtl.v11i3.1191 ◽

2016 ◽

Vol 11 (3) ◽

pp. 451

Author(s):

Nunik Sulistinah ◽

Bambang Sunarko

Keyword(s):

Carbon Source ◽

Nitrogen Source ◽

Gold Mining ◽

Degradation Rate ◽

Mining Industry ◽

Potassium Cyanide ◽

Bacterial Consortium ◽

Enrichment Medium ◽

Degrading Bacteria

Bacterial consortium capable of growing and utilizing cyanide as a source of nitrogen were isolated from effluent of gold mining industry. The isolation was conducted using liquid enrichment medium with potassium cyanide and glucose as nitrogen and carbon source, respectively. These consortium could tolerate and were able to grow on KCN at concentration of up to 1000 ppm. Bacterial consortium LP3 were also able to degrade potassium cyanide and ammonium as product of the degradation. The degradation rate was 9,0μM per minute. The cyanide-degrading bacteria found in this consortium were identified as Bacillus, Corynebacterium, and Serratia.Keywords: potassium cyanide, nitrogen source, bacterial consortium LP3,degradation

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ASSESSMENT OF HEAVY METAL CONCENTRATION IN COCONUT WATER

Recent Research in Science and Technology ◽

10.25081/rrst.2018.10.3370 ◽

1970 ◽

pp. 07-10

Author(s):

MdDidarul Islam, Ashiqur Rahaman, Aboni Afrose

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Heavy Metal Concentration ◽

Coconut Water ◽

Toxic Heavy Metals ◽

High Concentration ◽

Toxic Heavy Metal ◽

Low Concentration ◽

Wet Ashing ◽

Aas Method

This study was based on determining concentration of essential and toxic heavy metal in coconut water available at a local Hazaribagh area in Dhaka, Bangladesh. All essential minerals, if present in the drinking water at high concentration or very low concentration, it has negative actions. In this study, fifteen samples and eight heavy metals were analyzed by Atomic Absorption Spectroscopy (AAS) method which was followed by wet ashing digestion method. The concentration obtained in mg/l were in the range of 0.3 to 1.5, 7.77 to 21.2, 0 to 0.71, 0 to 0.9, 0 to 0.2, 0.9 to 17.3, 0.1 to 0.9, 0 to 0.9 and 0 to 0.7 for Fe, Ni, Cu, Cd, Cr, Zn, Pb and Se respectively. From this data it was concluded that any toxic heavy metals like Cd, Cr, Pb and Ni exceed their toxicity level and some essential nutrients were in low concentration in those samples.

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Assessment of micro and macro nutrients in poultry feeds available in Dhaka city, Bangladesh.

Journal of Scientific Agriculture ◽

10.25081/jsa.2017.v1.825 ◽

2017 ◽

Vol 1 ◽

pp. 264

Author(s):

Md Didarul Islam ◽

Ashiqur Rahaman ◽

Fahmida Jannat

Keyword(s):

Heavy Metals ◽

Adverse Effect ◽

The Other ◽

Nutrient Level ◽

Dhaka City ◽

Toxic Heavy Metals ◽

High Concentration ◽

Low Concentration ◽

Feed Formulation ◽

Macro Nutrients

This study was based on to determine the concentration of macro and micro nutrients as well as toxic and nontoxic heavy metals present in the chicken feed available in Dhaka city of Bangladesh. All macro nutrients, if present in the feed at high concentration have some adverse effect, at the same time if this nutrient present in the feed at low concentration this have some adverse effect too. So that this nutrient level should be maintained at a marginal level. On the other side toxic heavy metals if present in the feed at very low concentration those can contaminate the total environment of the ecosystem. In this study six brand samples (starter, grower, finisher and layer) which was collected from different renowned chicken feed formulation industry in Bangladesh. Those samples were prepared for analysis by wet ashing and then metals were determined by Atomic Absorption Spectroscopy. It was found that 27.7 to 68.4, 57.3 to 121.9, 0.21 to 4.1, 0.32 to 2.1, 0.11 to 1.58, 0.28 to 2.11 and 0.28 to 1.78 for zinc, iron, copper, mercury, cadmium, nickel and cobalt respectively. It was found that essential macro and micro nutrients were present in the feed in low concentration on the other side mercury was present in high concentration in the feed samples.

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Determination of Traces Heavy Metals from Solid Residues Formed by Combustion of Lignite in Relation to Degree of Accessibility in Soil and Plants

Revista de Chimie ◽

10.37358/rc.17.10.5886 ◽

2017 ◽

Vol 68 (10) ◽

pp. 2363-2366

Author(s):

Delia Nica Badea

Keyword(s):

Heavy Metals ◽

Power Plant ◽

Thermal Power ◽

Reference Value ◽

Combustion Products ◽

Toxic Heavy Metals ◽

Area Of Influence ◽

Risk Potential

The paper evaluates the presence and content of traces of heavy metals Hg, Pb, Ni, Cd (total forms) from coal and solid combustion products, the degree of transfer and accessibility in the area of influence of a lignite power plant. The content of toxic heavy metals in residues are characterized by RE Meiji [ 1 (Pb and Hg) and REMeij �1 (Ni and Cd) for the filter ash. Pb and Ni content in the soil exceeds normal values, and Pb exceeds and alert value for sensitive soils around the residue deposit (70.20 mg.Kg-1). The degree of accessibility of the metals in plants (TF), reported at the Khan reference value (0.5), indicates a significant bioaccumulation level for the metals: Cd (1.9) and Hg (0.6) inside the deposit; Cd (0.39) at the base of the deposit, Hg (0.8) in the area of the thermal power plant. The trace levels of heavy metals analyzed by GFAAS and CVAAS (Hg), indicates a moderate risk potential for food safety and quality of life in the studied area.

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Metal-induced oxidative stress level in patients with fibromyalgia syndrome and its contribution to the severity of the disease: A correlational study

Journal of Back and Musculoskeletal Rehabilitation ◽

10.3233/bmr-200102 ◽

2020 ◽

pp. 1-8

Author(s):

Varsha Shukla ◽

Siddharth Kumar Das ◽

Abbas Ali Mahdi ◽

Shweta Agarwal ◽

Ragini Alok ◽

...

Keyword(s):

Oxidative Stress ◽

Heavy Metals ◽

Fibromyalgia Syndrome ◽

Positive Association ◽

Protein Carbonyl ◽

Essential Metals ◽

Toxic Heavy Metals ◽

Essential Trace Elements ◽

Rheumatological Disease ◽

Severity Of The Disease

BACKGROUND: Fibromyalgia syndrome (FMS) is an extra-articular rheumatological disease characterised by widespread chronic musculoskeletal pain. Metal-induced oxidative stress contributes to the severity of FMS. AIMS: First, this study evaluated the association between plasma levels of toxic heavy metals and essential metals with oxidative stress (OS) markers. Second, the OS markers and metal contents were correlated with the disease severity by assessing the Fibromyalgia Impact Questioner Revised (FIQR) and tender points (TP). METHOD: A total of 105 FMS patients and 105 healthy controls of similar age and sex were recruited. OS parameter such as lipid peroxidation (LPO), protein carbonyl group (PCG), nitric oxide (NO) and essential metals such as zinc (Zn), magnesium (Mg), manganese (Mn), copper (Cu) and toxic heavy metals such as aluminium (Al), arsenic (As), lead (Pb) were estimated. RESULTS: Levels of LPO, PCG, NO (p< 0.001) and Cu, Mn, and Al (p< 0.001), were significantly higher, and Mg (p< 0.001) and Zn (p< 0.001) were significantly lower in patients compared to controls. A positive association was observed between OS parameters, FIQR and TP with Cu, Al and Mn. A significant negative association was observed between Zn and Mg with FIQR, TP and OS parameters. CONCLUSION: Heavy metals such as Al induce OS parameters and decrease the levels of essential trace elements such as Mg and Zn, which may be responsible for the severity of FMS.

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