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Environmental Arsenic and Selenium Contamination and Approaches Towards Its Bioremediation Through the Exploration of Microbial Adaptations:A Review

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Pedosphere 2019年第5期29卷 554-568页

作者： tanmoy paul Nimai Chandra SAHA National Institute of Cholera and Enteric Diseases Kolkata 700010 (India) Fishery and Ecotoxicology Research Laboratory (Vice-Chancellor}s Research Group) Department of ZoologyThe University of BurdwanBurdwan 713104 (India)

Bioaccumulation of selenium and arsenic resulting from geogenic activities and aggravated by anthropogenic actions has now become a serious environmental issue. Different parts of the world are experiencing issues of selenium and arsenic contamination, especially in soil and ground water. The present selenium and arsenic contamination scenario has been well represented in contemporary literature, and there are an array of remediation techniques targeting the decontamination of environmental contamination. The use of microbe-mediated remediation of selenium and arsenic contamination is gaining scientific attention for sustainable environmental bioremediation. The present review elucidates the different aspects of selenium and arsenic contamination, bioaccumulation, and bioremediation with implications for successful decontamination of these heavy metals.

关键词： bioaccumulation biogeochemistry chemical species contaminant decontamination heavy metal microbial remediation microorganism

Arsenic Bioremediation Potential of Arsenite-Oxidizing Micrococcus sp. KUMAs15 Isolated from Contaminated Soil

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Pedosphere 2018年第2期28卷 299-310页

作者： tanmoy paul Arindam CHAKRABORTY Ekramul ISLAM Samir Kumar MUKHERJEE Department of Microbiology University of Kalyani

Environmental arsenic(As) contamination,considered as the largest mass poisoning of the human population,has become a serious health concern for the people of South East Asia,including those living in the Bengal *** As-resistant strain,KUMAs15,was isolated from the As-contaminated fields in Nadia Ddistrict in West Bengal,India and was evaluated for its possible use in environmental As *** identification based on 16S rDNA gene sequencing revealed that the strain belonged to the genus *** strain tolerated high levels of As and oxidized arsenite under the culture *** strain also accumulated large quantities of As when exposed to a wide range of environmentally relevant concentrations of inorganic *** of the aoxB,arsB,and arsC gene expression explained the underlying cause of arsenite oxidation and As accumulation by *** As-resistant strain KUMAs15 of Micrococcus *** suggested to be a potential environmental As decontaminant.

关键词： aoxB gene ars operon As accumulation As contamination As decontamination metal tolerance microbial surfaceadsorption

Tilapia Lake Virus(TiLV)disease:Current status of understanding

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Aquaculture and Fisheries 2022年第1期7卷 7-17页

作者： Nilav Aich Anirban paul tanmoy Gon Choudhury Himadri Saha Department of Fisheries Government of TripuraTripura799006India ICAR-Central Institute of Freshwater Aquaculture KausalyagangaBhubaneswar751002India Department of Aquatic Health&Environment College of FisheriesCentral Agricultural University(Imphal)LembucherraTripura799210India

Tilapia Lake Virus(TiLV)disease is an emerging and transboundary disease of tilapia cultures,causing mortality up to 90%*** is a negative sense single stranded RNA virus belongs to family Amnoonviridae,genus Tilapinevirus and species Tilapia *** first TiLV outbreak to fishes was reported from Israel followed by other countries viz.,Ecuador,Colombia,Egypt,Thailand,Chinese Taipei,India,Malaysia,Bangladesh,Uganda,Tanzania,Peru,Mexico,Philippines,Indonesia,and *** the life stages of Tilapia(belonging to the family Cichlidae)are vulnerable to TiLV ***,river barb and giant gourami have also been found susceptible to TiLV *** virus infects the vital organs of the fish,including eyes,brain,and *** notable pathological finding of this disease includes syncytial cell formation and massive hepatocellular necrosis with pyknotic and karyolytic nuclei in the liver cells of infected *** disease is very contagious and spreads through both horizontal and vertical *** sensitive and rapid molecular diagnostic tools like reverse transcriptase polymerase chain reaction(RT-PCR),RT-quantitative PCR(RT-qPCR),loop-mediated isothermal amplification(LAMP)have been developed for early detection of the *** date,no comprehensive control measures have been developed throughout the globe,although aggressive work on this line is going *** of strict good management practices,including quarantine protocols,are the only available option to combat the outbreak and spread of the *** review emphasizes the etiology,occurrence and distribution,mode of transmission,pathology and pathogenesis,diagnosis,possible control measures,and challenges of TiLV disease.

关键词： Co-habitation Diagnosis Tilapinevirus Syncytial Tilapia lake virus

Major Soil Chemical Properties of the Major Tea-Growing Areas in India

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Pedosphere 2015年第2期25卷 316-328页

作者： tanmoy KARAK Ranjit Kumar paul Romesh Kumar BORUAH Indira SONAR Biswajyoti BORDOLOI Amrit Kumar DUTTA Borsha BORKOTOKY Upper Assam Advisory Centre Tea Research Association Division of Statistical Genetics Indian Agricultural Statistics Research Institute Arunachal Advisory Centre Tea Research AssociationDirectorate of Trade and CommerceGovernment of Arunachal Pradesh

Major chemical properties of tea-growing soils are of paramount importance for better management in a sustainable ***,this study was carried out to understand the major soil chemical properties of major tea(Camellia sinensis L.)-growing areas,Dibrugarh and Tinsukia districts,in the state of Assam,India.A total of 991 surface soil samples were collected from 15 large tea estates(TEs) for analysis of their major chemical *** pH ranged from 3.61 to *** organic carbon and total nitrogen ranged from 2.4 to 47.3 and 0.24 to 3.60 g kg^(-1),*** soils were sufficiently rich in plant-available potassium(as K_2O),which ranged from 127.71 to 252.33 mg kg^(-1),exceeding the amount prescribed for optimum tea yield of > 100 mg kg^(-1).Plant-available sulfur among soil samples widely varied from 4 to 129 mg kg^(-1).Results of hierarchical clustering analysis for homogenous grouping of the 15 TEs based on soil chemical properties showed that the 15 TEs could be classified into three distinct groups which consisted of6,8 and 1 TEs,*** on the Kolmogorov-Smirnov(K-S) test,the best fitted theoretical probability distributions were found out for different soil chemical *** could be concluded that a balanced fertilizer application would be needed as a part of tea improvement program using soil chemical test.

关键词： organic carbon plant-available potassium plant-available sulfur probability distribution soil pH tea estates total nitrogen