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Nityananda Mondal Mayalagu Rajkumar Jun Sun Sourav Kundu P. S. Lyla Seyed Ajmal Khan Jean Paul Trilles 《Environmental monitoring and assessment》2010,171(1-4):471-486
The present study about the gammarid amphipods of Vellar and Uppanar estuaries was performed during two seasons (pre-monsoon and post-monsoon, 2005–2006), respectively, in nine habitats: five in the Vellar estuary and four in the Uppanar estuary. Amphipod samples were collected from sediments, oyster beds, seaweeds, sea grass, and mangroves. A total of 29 species of gammarid amphipods were collected in each area. The surface water temperature ranged from 16°C to 26°C, the salinity from 20 to 32 psu, and the pH between 7.5 and 8.3. Dissolved oxygen ranged from 5.3 to 7.8 ml/l. The maximum abundance of amphipods was observed during the pre-monsoon (July to September) in Vellar mangrove, and it was minimum during the pre-monsoon in Uppanar sea grass. It was found that several physicochemical factors, such as salinity, temperature, dissolved oxygen, pH, and the substrate have a marked effect on the distribution and the relative abundance of amphipods. The ranges of species diversity, richness, dominance, and evenness in the Vellar and Uppanar estuaries were 1.58–4.15, 1.82–5.29, 0–0.11, and 0.96–1, respectively. Using multivariate analyses, in each estuary, it was possible to identify different communities of amphipod species according to their habitats. 相似文献
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Sandip Rooj Ganesh C. Basak Pradip K. Maji Anil K. Bhowmick 《Journal of Polymers and the Environment》2011,19(2):382-390
Devulcanization of natural rubber (NR) compound was carried out by means of benzoyl peroxide as a devulcanizing agent by two different techniques namely (a) chemical process and (b) mechano-chemical process. Furthermore, the effects of time and concentration of devulcanizing agent on the devulcanization process were investigated. The extent of devulcanization of natural rubber was studied by estimation of percent devulcanization, volume fraction of rubber after swelling, Mooney viscosity and crosslinked density. The devulcanized natural rubber obtained from mechano-chemical process was blended with virgin natural rubber in different proportions. The mechanical properties and morphology of the revulcanized blends were examined and found to be interesting. Thus, waste rubber could be reused successfully by this technique. 相似文献
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Bhattacharya Sourav Das Arijit Krishnan Kavitha Patil Nischita A. Sadique Jaffar 《Environmental science and pollution research international》2021,28(45):64030-64038
Environmental Science and Pollution Research - Phenol and its derivatives behave as mutagens, teratogens and carcinogens inducing adverse physiological effects and are considered environmental... 相似文献
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Maity Sourav Nanda Soumyashree Sarkar Angana 《Environmental science and pollution research international》2021,28(42):58885-58901
Environmental Science and Pollution Research - Biosorption is an ingenious technique that uses biological materials to acquire trace metal ions from wastewater. In the present study, the ability of... 相似文献
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Sourav Bhowmick Ritwika Das Amal Chandra Das 《Environmental monitoring and assessment》2014,186(10):6849-6856
An experiment was conducted under laboratory conditions to investigate the effect of two pre-emergence herbicides, viz., thiobencarb (at 1.5 and 4.5 kg active ingredient (a.i.) ha?1) and pretilachlor (at 0.5 and 1.5 kg a.i. ha?1), on the growth and multiplication of some microorganisms (bacteria, actinomycetes and fungi) in relation to transformations and availability of C and N in the Gangetic alluvial soil (Typic Haplustept) of West Bengal, India. Application of both the herbicides, in general, significantly increased microbial biomass, resulting in greater retention, mineralization and availability of oxidizable organic C and N in soil, and the stimulations were more pronounced when the herbicides were applied at their lower concentrations (recommended field application rates), more so with thiobencarb, as compared to pretilachlor. Compared to untreated control soil, the application of thiobencarb at lower concentration increased the proliferation of total bacteria, actinomycetes and fungi by 57.3, 36.6 and 55.2 %, respectively, and released the highest amount (40.2 %) of soluble NO3 ? in soil, while pretilachlor at field application rate induced the growth and multiplication of bacteria and fungi by 58.3 and 17.6 %, respectively. Irrespective of the concentrations, the stimulations were at par for both the herbicides towards the retention of oxidizable organic C, total N and exchangeable NH4 + in soil. 相似文献
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Due to depletion of natural resources and increasing greenhouse emissions, new technologies for the transformation of waste polymers into valuable materials represent one of our greatest current needs. Acrylonitrile–butadiene–styrene terpolymer (ABS) is one of the most widely used engineering plastics and is used as outer casing for electronic equipment. Nitrile rubber (NBR) is used in many applications that demand oil resistance. In an attempt to explore whether these materials can be successfully recycled, we prepared blends of scrap computer plastics (SCP) based on ABS with NBR and waste NBR powder (w-NBR), and investigated their mechanical properties and recyclability. Specifically, we assessed the effect of dynamic vulcanization and replacement of virgin NBR with w-NBR on the properties of 60/40, 70/30, and 80/20 NBR/SCP blends. These blends exhibited thermoplastic elastomeric behavior. The thermoplastic elastomeric blends showed excellent swelling resistance to standard lubricant oil (namely, IRM 903 oil). 相似文献
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Das Sourav Kumar Shrivastava Sandeep 《Journal of Material Cycles and Waste Management》2022,24(4):1281-1294
Journal of Material Cycles and Waste Management - Enormous generation of construction and demolition (C&D) waste along with municipal solid waste (MSW) is required to managed properly for... 相似文献
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