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951.
Due to the close proximity of the Bay of Bengal and the freshwater inflow of Bhagirathi-Hooghly, Diamond Harbour appeared as an important coastal station of the Bhagirathi-Hooghly estuary. The spatial and temporal composition and abundance of microphytoplankton species was examined in relation to physical and chemical surface water variables (i.e., salinity, nutrient, and temperature).The primary objective of the study was to observe the variations in phytoplankton species assemblages as a response to environmental variables. Hierarchical cluster analysis and non-metric multidimensional scaling were used to find out distinct seasonal groups based on the composition of phytoplankton. The results indicate that several key environmental factors like temperature, DIN content, and molar ratio of nutrients like DIN-DIP and DIN-DSi influenced seasonal phytoplankton assemblages within the estuary. The distribution of phytoplankton population showed two main groups where the blue-green and green algal populations favored the warmer conditions of summer and monsoon months, whereas the diatom population primarily flourished in the cooler months of autumn and winter. 相似文献
952.
Photo-catalytic decolourisation of toxic dye with N-doped titania: A case study with Acid Blue 25 总被引:1,自引:0,他引:1
Dyes are one of the hazardous water pollutants.Toxic Acid Blue 25,an anthraquinonic dye,has been decolourised by photo-catalysing it with nitrogen doped titania in aqueous medium.The photo catalyst was prepared from 15% TiCl 3 and 25% aqueous NH 3 solution as precursor.XRD and TEM revealed the formation of well crystalline anatase phase having particle size in the nano-range.BET surface area of the sample was higher than that of pure anatase TiO 2.DRS showed higher absorption of radiation in visible range compared to pure anatase TiO 2.XPS revealed the presence of nitrogen in N-Ti-O environment.The experimental parameters,namely,photocatalyst dose,initial dye concentration as well as solution pH influence the decolourisation process.At pH 3.0,the N-TiO 2 could decolourise almost 100% Acid Blue 25 within one hour.The influence of N-TiO 2 dose,initial concentration of Acid Blue 25 and solution pH on adsorption-desorption equilibrium is also studied.The adsorption process follows Lagergren first order kinetics while the modified Langmuir-Hinselwood model is suitably fitted for photocatalytic decolourisation of Acid Blue 25. 相似文献
953.
Mesozoic deposits of the former Gondwanaland are depauperate in early mammals, in general, and multituberculate mammals, in particular. Until now, the oldest multituberculate mammals known from the Gondwanan continents come from the Early Cretaceous of Morocco, NW Africa. Here, we report the presence of a new multituberculate mammal, Indobaatar zofiae gen. et sp. nov., from the Lower/Middle Jurassic Kota Formation, Pranhita-Godavari valley in peninsular India. This is the first record of a multituberculate from the Mesozoic rocks of India and possibly predates the oldest known multituberculates from Gondwanan continents. The new specimen, representing an upper premolar (P4), compares well with the upper premolar morphology of Eobaatariinae multituberculates known from the Early Cretaceous of Mongolia, China, England, and Spain. Together with the recent findings of cimolodontan multituberculates from the Early Cretaceous of Australia and Late Cretaceous of South America, the new discovery indicates a wide temporal and spatial distribution for multituberculate mammals in the former Gondwanaland. 相似文献
954.
Thakur Amrit Kumar Sathyamurthy Ravishankar Sharshir Swellam Wafa Kabeel Abd Elnaby Manokar Athikesavan Muthu Zhao Wensheng 《Environmental science and pollution research international》2021,28(28):37371-37386
Environmental Science and Pollution Research - This study aims to augment the performance of a solar desalination unit. To experimental examine this idea, a modified solar still with three... 相似文献
955.
Kaur Ishnoor Behl Tapan Aleya Lotfi Rahman Habibur Kumar Arun Arora Sandeep Bulbul Israt Jahan 《Environmental science and pollution research international》2021,28(30):40515-40532
Environmental Science and Pollution Research - The world has never been prepared for global pandemics like the COVID-19, currently posing an immense threat to the public and consistent pressure on... 相似文献
956.
Das Atanu Kumar Islam Md. Nazrul Billah Md. Morsaline Sarker Asim 《Environmental science and pollution research international》2021,28(23):28993-29008
Environmental Science and Pollution Research - Municipal solid waste (MSW) represents an inevitable by-product of human activity and a major crisis for communities across the globe. In recent... 相似文献
957.
Bhattacharya Amrik Sadaf Ayesha Dubey Swati Singh Rajesh P. Khare Sunil Kumar 《Environmental science and pollution research international》2021,28(34):46423-46430
Environmental Science and Pollution Research - In the present study, fermentative production of bacterial nanocellulose (BNC) by using Komagataeibacter xylinus strain SGP8 and characterization of... 相似文献
958.
Prasad Arani Rajendra Shankar Ramalingam Patil Chandrashekhar K. Karthick Alagar Kumar Amit Rahim Robbi 《Environmental science and pollution research international》2021,28(36):50017-50027
Environmental Science and Pollution Research - The photovoltaic (PV) for irrigation system is an emerging technology to harness the solar energy. The performance of the PV modules depends on the... 相似文献
959.
Raja Prakash Krishnaraj Srinivasamoorthy Selvaraj Gopinath Kumar Saravanan Francis Vinnarasi 《Environmental science and pollution research international》2021,28(5):5495-5519
Environmental Science and Pollution Research - Groundwater and saline water interaction is the most common processes in the coastal aquifers that alters the quality of aquifer waters. The... 相似文献
960.
Markandeya Verma Pradeep Kumar Mishra Vibhuti Singh Neeraj Kumar Shukla Sheo Prasad Mohan Devendra 《Environmental science and pollution research international》2021,28(9):10536-10551
Environmental Science and Pollution Research - The present work aims to investigate seasonal variations in air pollution levels in Lucknow and assess the ambient air quality of the city together... 相似文献