| 2021 |
Hossain MZ, Bahar MM, Sarkar B, Donne SW, Wade P, Bolan N, 'Assessment of the fertilizer potential of biochars produced from slow pyrolysis of biosolid and animal manures', Journal of Analytical and Applied Pyrolysis, 155 (2021) [C1]
Excessive amounts of animal manures and production of a large volume of biosolids pose serious environmental issues in terms of their safe disposal and management. Thermochemical ... [more] Excessive amounts of animal manures and production of a large volume of biosolids pose serious environmental issues in terms of their safe disposal and management. Thermochemical treatment of bio-waste materials via pyrolysis can convert them into value-added products such as biochar-based fertilizers. In this study, fourteen biochars were produced from one biosolid and thirteen animal manures by slow pyrolysis at 300 °C. All feedstock and biochar samples were characterized by determining the yield, and physicochemical and surface properties, including the C-containing functional groups. Principal component and cluster analyses were used to classify the feedstock/biochar materials based on their mineral constituents. The biochar yield of various feedstocks ranged from 39 to 81%, with the highest yield for grain-fed cow manure. The highest N and K content was found in chicken manure biochar (57.8 and 29.2 g kg , respectively), while the highest P was found in biosolid biochar (40.5 g kg ). The specific surface area of biochars ranged from 96.06¿110.83 m g . Hierarchical analyses of the chemical compositions of feedstocks and biochars enabled grouping of the materials respectively into four and five distinguished clusters. Three principal components (PC) explained 86.8% and 83.3% of the variances in the feedstocks and biochars, respectively. The PC1 represented the content of the major nutrients (N, P and K), whereas PC2 and PC3 represented other nutrients (secondary and micronutrients) contents and physicochemical properties (pH and EC). The results of this study suggested that biochars produced from different manures and biosolids may potentially be a source of soil nutrients and trace elements. In addition, different biochars may be applied to different nutrient-deficient soils to avoid plausible nutrient and potentially toxic element contamination. ¿1 ¿1 2 -1
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| 2021 |
Rahman MA, Rahman MM, Bahar MM, Sanderson P, Lamb D, 'Antimonate sequestration from aqueous solution using zirconium, iron and zirconium-iron modified biochars.', Sci Rep, 11 8113 (2021) [C1]
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| 2021 |
Gao Y, Du J, Bahar MM, Wang H, Subashchandrabose S, Duan L, et al., 'Metagenomics analysis identifies nitrogen metabolic pathway in bioremediation of diesel contaminated soil', Chemosphere, 271 (2021) [C1]
Nitrogen amendment is known to effectively enhance the bioremediation of hydrocarbon-contaminated soil, but the nitrogen metabolism in this process is not well understood. To unra... [more] Nitrogen amendment is known to effectively enhance the bioremediation of hydrocarbon-contaminated soil, but the nitrogen metabolism in this process is not well understood. To unravel the nitrogen metabolic pathway(s) of diesel contaminated soil, six types of nitrogen sources were added to the diesel contaminated soil. Changes in microbial community and soil enzyme genes were investigated by metagenomics analysis and chemical analysis through a 30-day incubation study. The results showed that ammonium based nitrogen sources significantly accelerated the degradation of total petroleum hydrocarbon (TPH) (79¿81%) compared to the control treatment (38%) and other non-ammonium based nitrogen amendments (43¿57%). Different types of nitrogen sources could dramatically change the microbial community structure and soil enzyme gene abundance. Proteobacteria and Actinobacteria were identified as the two dominant phyla in the remediation of diesel contaminated soil. Metagenomics analysis revealed that the preferred metabolic pathway of nitrogen was from ammonium to glutamate via glutamine, and the enzymes governing this transformation were glutamine synthetase and glutamate synthetase; while in nitrate based amendment, the conversion from nitrite to ammonium was restrained by the low abundance of nitrite reductase enzyme and therefore retarded the TPH degradation rate. It is concluded that during the process of nitrogen enhanced bioremediation, the most efficient nitrogen cycling direction was from ammonium to glutamine, then to glutamate, and finally joined with carbon metabolism after transforming to 2-oxoglutarate.
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| 2021 |
Rahman MA, Lamb D, Rahman MM, Bahar MM, Sanderson P, Abbasi S, et al., 'Removal of arsenate from contaminated waters by novel zirconium and zirconium-iron modified biochar', Journal of Hazardous Materials, 409 (2021) [C1]
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| 2021 |
Hasan SMM, Akber MA, Bahar MM, Islam MA, Akbor MA, Siddique MAB, Islam MA, 'Chromium Contamination from Tanning Industries and Phytoremediation Potential of Native Plants: A Study of Savar Tannery Industrial Estate in Dhaka, Bangladesh', BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY, (2021)
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| 2020 |
Bahar MM, Mahbub KR, Naidu R, Megharaj M, 'A simple spectrophotometric method for rapid quantitative screening of arsenic bio-transforming bacteria', Environmental Technology and Innovation, 19 (2020) [C1]
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| 2020 |
Hossain MZ, Bahar MM, Sarkar B, Donne SW, Ok YS, Palansooriya KN, et al., 'Biochar and its importance on nutrient dynamics in soil and plant', BIOCHAR, 2 379-420 (2020)
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| 2020 |
Lal MS, Megharaj M, Naidu R, Bahar MM, 'Uptake of perfluorooctane sulfonate (PFOS) by common home-grown vegetable plants and potential risks to human health', Environmental Technology and Innovation, 19 (2020) [C1]
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| 2018 |
Bahar MM, Mahbub KR, Naidu R, Megharaj M, 'As(V) removal from aqueous solution using a low-cost adsorbent coir pith ash: Equilibrium and kinetic study', Environmental Technology and Innovation, 9 198-209 (2018) [C1]
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| 2018 |
Mahbub KR, Bahar MM, Megharaj M, Labbate M, 'Are the existing guideline values adequate to protect soil health from inorganic mercury contamination?', Environment International, 117 10-15 (2018) [C1]
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| 2017 |
Mahbub KR, Bahar MM, Labbate M, Krishnan K, Andrews S, Naidu R, Megharaj M, 'Bioremediation of mercury: not properly exploited in contaminated soils!', APPLIED MICROBIOLOGY AND BIOTECHNOLOGY, 101 963-976 (2017) [C1]
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| 2017 |
Dong Z, Bahar MM, Jit J, Kennedy B, Priestly B, Ng J, et al., 'Issues raised by the reference doses for perfluorooctane sulfonate and perfluorooctanoic acid', ENVIRONMENT INTERNATIONAL, 105 86-94 (2017) [C1]
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| 2016 |
Bahar MM, Megharaj M, Naidu R, 'Oxidation of arsenite to arsenate in growth medium and groundwater using a novel arsenite-oxidizing diazotrophic bacterium isolated from soil', International Biodeterioration and Biodegradation, 106 178-182 (2016) [C1]
An arsenic hyper-tolerant diazotrophic bacterium was isolated from a heavy metal contaminated soil. The pure isolate MM-17 was identified as Azospirillum sp. based on phylogenetic... [more] An arsenic hyper-tolerant diazotrophic bacterium was isolated from a heavy metal contaminated soil. The pure isolate MM-17 was identified as Azospirillum sp. based on phylogenetic analysis of 16S rRNA. The strain oxidized 100 µM As(III) to As(V) in both culture media (minimal salts) and real groundwater within 8 and 10 h, respectively. The oxidation of As(III) by this strain was observed within the pH range 5-10 with the best performance at pH 7-8. As(III) oxidation was found to be independent of cell growth which implies the oxidation enzymes are constitutively expressed. The whole cell kinetic study highlighted a lower value of kinetic constant, K as 32.9 µM As(III), which indicates that the strain MM-17 has greater affinity for As(III). The gene sequence of the large subunit of arsenite oxidase of MM-17 showed 99 and 72% similarity to the large subunit of arsenite oxidase of Stenotrophomonas sp. MM-7 and Sinorhizobium sp. M14, respectively. Sphaeroplasts experiments suggest that arsenite oxidase is a membrane associated protein in MM-17. s
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| 2016 |
Bahar MM, Megharaj M, Naidu R, 'Influence of phosphate on toxicity and bioaccumulation of arsenic in a soil isolate of microalga Chlorella sp.', Environmental Science and Pollution Research, 23 2663-2668 (2016) [C1]
In this study, the toxicity, biotransformation and bioaccumulation of arsenite and arsenate in a soil microalga, Chlorella sp., were investigated using different phosphate levels.... [more] In this study, the toxicity, biotransformation and bioaccumulation of arsenite and arsenate in a soil microalga, Chlorella sp., were investigated using different phosphate levels. The results indicated that arsenate was highly toxic than arsenite to the alga, and the phosphate limitation in growth media greatly enhanced arsenate toxicity. The uptake of arsenate in algal cells was more than that of arsenite, and the predominant species in the growth media was arsenate after 8¿days of exposure to arsenite or arsenate, indicating arsenite oxidation by this microalga. Arsenate reduction was also observed when the alga was incubated in a phosphate-limiting growth medium. Similar to the process of biotransformation, the alga accumulated more arsenic when it was exposed to arsenate and preferably more in a phosphate-limiting condition. Although phosphate significantly influences the biotransformation and bioaccumulation of arsenic, the oxidizing ability and higher accumulation capacity of this alga have great potential for its application in arsenic bioremediation.
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| 2013 |
Bahar MM, Megharaj M, Naidu R, 'Bioremediation of Arsenic-Contaminated Water: Recent Advances and Future Prospects', WATER AIR AND SOIL POLLUTION, 224 (2013)
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| 2013 |
Bahar MM, Megharaj M, Naidu R, 'Bioremediation of arsenic-contaminated water: Recent advances and future prospects topical collection on remediation of site contamination', Water, Air, and Soil Pollution, 224 (2013)
Arsenic contamination of groundwater and surface water is widespread throughout the world. Considering its carcinogenicity and toxicity to human and animal health, remediation of ... [more] Arsenic contamination of groundwater and surface water is widespread throughout the world. Considering its carcinogenicity and toxicity to human and animal health, remediation of arsenic-contaminated water has become a high priority. There are several physicochemical-based conventional technologies available for removing arsenic from water. However, these technologies possess a number of limitations such as high cost and generation of toxic by-products, etc. Therefore, research on new sustainable and cost-effective arsenic removal technologies for water has recently become an area of intense research activity. Bioremediation technology offers great potential for possible future application in decontamination of pollutants from the natural environment. It is not only environmentally friendly but cost-effective as well. This review focuses on the state-of-art knowledge of currently available arsenic remediation methods, their prospects, and recent advances with particular emphasis on bioremediation strategies. © 2013 Springer Science+Business Media Dordrecht.
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| 2013 |
Bahar MM, Megharaj M, Naidu R, 'Kinetics of arsenite oxidation by Variovorax sp MM-1 isolated from a soil and identification of arsenite oxidase gene', JOURNAL OF HAZARDOUS MATERIALS, 262 997-1003 (2013) [C1]
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| 2013 |
Bahar MM, Megharaj M, Naidu R, 'Toxicity, transformation and accumulation of inorganic arsenic species in a microalga Scenedesmus sp isolated from soil', JOURNAL OF APPLIED PHYCOLOGY, 25 913-917 (2013) [C1]
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| 2012 |
Bahar MM, Megharaj M, Naidu R, 'Arsenic bioremediation potential of a new arsenite-oxidizing bacterium Stenotrophomonas sp MM-7 isolated from soil', BIODEGRADATION, 23 803-812 (2012)
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| 2012 |
Islam MN, Rahman K-S, Bahar MM, Habib MA, Ando K, Hattori N, 'Pollution attenuation by roadside greenbelt in and around urban areas', URBAN FORESTRY & URBAN GREENING, 11 460-464 (2012)
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| 2010 |
Bahar MM, Reza MS, 'Hydrochemical characteristics and quality assessment of shallow groundwater in a coastal area of Southwest Bangladesh', ENVIRONMENTAL EARTH SCIENCES, 61 1065-1073 (2010)
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| 2008 |
Bahar MM, Uddin MN, Islam MA, Harun AYA, 'Extensive shrimp culture in the coastal areas of Bangladesh: An alarming threat to Mangrove ecosystem', Journal of Science Foundation, 6 56-64 (2008) |
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| 2008 |
Bahara M, Yamamuro M, 'Assessing the influence of watershed land use patterns on the major ion chemistry of river waters in the Shimousa Upland, Japan', CHEMISTRY AND ECOLOGY, 24 341-355 (2008)
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| 2008 |
Bahar MM, Ohmori H, Yamamuro M, 'Relationship between river water quality and land use in a small river basin running through the urbanizing area of Central Japan', LIMNOLOGY, 9 19-26 (2008)
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| 2007 |
Harun AYA, Uddin MN, Islam MA, Bahar MM, 'Effects of small scale water development projects on fisheries: A case study from saline water subprojects', Khulna University Studies, 8 57-63 (2007) |
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| 2006 |
Uddin MN, Bahar MM, Islam MA, Harun AYA, 'An evaluation of water supply scenario in Khulna City Corporation area', Khulna University Studies, 7 33-36 (2006) |
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| 2005 |
Zuthi MFR, Bahar MM, 'A comparative risk assessment of hazardous toxic and potentially toxic elements generating from coal fired power plant and waste water treatment plant', Khulna University Studies, 6 25-28 (2005) |
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| 2005 |
Uddin MN, Bahar MM, Islam MA, Harun AYA, 'Options for development of water supply systems in Khulna City Corporation area: A sustainable approach', Journal of Science Foundation, 3 11-15 (2005) |
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| 2003 |
Azad AK, Bahar MM, Sultana J, 'Study on the use of biomass as cooking fuel in a village peripheral to the Sundarbans. Journal of Science Foundation', Journal of Science Foundation, 1 35-41 (2003) |
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