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排序方式: 共有118条查询结果,搜索用时 31 毫秒
31.
Ajit K. Chowdhury Thomas R. Stolzenburg Robert R. Stanforth Michael A. Warner Mark E. Larowe 《补救:环境净化治理成本、技术与工艺杂志》1996,6(2):15-21
The sediment associated with the reconstruction of a bridge pier was classifiable as hazardous by the Toxicity Characteristic Leaching Procedure (TCLP), due to elevated concentrations of lead. However, RCRA regulations do not classify the sediment as hazardous unless it is moved. RMT designed an in-situ, underwater treatment process to render the sediment nonhazardous, using phosphate-based chemistry before dredging. Subsequent sediment management was conducted without the additional regulatory requirements and costs associated with managing hazardous waste. 相似文献
32.
Vijay P. Singh Prabhat K. Chowdhury 《Journal of the American Water Resources Association》1986,22(2):275-282
ABSTRACT: A comparison of 13 different methods of estimating mean areal rainfall was made on two areas in New Mexico, U.S.A., and one area in Great Britain. Daily, monthly and yearly rainfall data were utilized. All methods, in general, yielded comparable estimates, especially for yearly values. This suggested that a simpler method would be preferable for estimating mean areal rainfall in these areas. 相似文献
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34.
Das Sumona Nath Kaustav Chowdhury Ranjana 《Environmental science and pollution research international》2021,28(10):12107-12118
Environmental Science and Pollution Research - Algae have long been acclaimed as the attractive renewable source for generating third-generation biofuels, particularly biodiesel. Under the present... 相似文献
35.
Ismail Md. Mofizur Rahman M. Monirul Islam M. Mosharraf Hossain M. Shahadat Hossain Zinnat A. Begum Didarul A. Chowdhury Milan K. Chakraborty M. Azizur Rahman M. Nazimuddin Hiroshi Hasegawa 《Environmental monitoring and assessment》2011,173(1-4):669-684
The concern over ensuing freshwater scarcity has forced the developing countries to delve for alternative water resources. In this study, we examined the potential of stagnant surface water bodies (SSWBs) as alternative freshwater resources in the densely populated Chittagong metropolitan area (CMPA) of Bangladesh??where there is an acute shortage of urban freshwater supply. Water samples were collected at 1-month intervals for a period of 1 year from 12 stations distributed over the whole metropolis. Samples were analyzed for pH, water temperature (WTemp), turbidity, electrical conductivity (EC), total dissolved solids, total solids, total hardness, dissolved oxygen (DO), chloride, orthophosphates, ammonia, total coliforms (TC), and trace metal (Cd, Cr, Cu, Pb, As, and Fe) concentrations. Based on these parameters, different types of water quality indices (WQIs) were deduced. WQIs showed most of CMPA-SSWBs as good or medium quality water bodies, while none were categorized as bad. Moreover, it was observed that the minimal water quality index (WQIm), computed using five parameters: WTemp, pH, DO, EC, and turbidity, gave a reliable estimate of water quality. The WQIm gave similar results in 72% of the cases compared with other WQIs that were based on larger set of parameters. Based on our finding, we suggest the wider use WQIm in developing countries for assessing health of SSWBs, as it will minimize the analytical cost to overcome the budget constraints involved in this kind of evaluations. It was observed that except turbidity and TC content, all other quality parameters fluctuated within the limit of the World Health Organization suggested standards for drinking water. From our findings, we concluded that if the turbidity and TC content of water from SSWBs in CMPA are taken care of, they will become good candidates as alternative water resources all round the year. 相似文献
36.
In a closed aerated laboratory soil test, volatilization and mineralization of 2,6-dichlorobenzonitrile-14C is negligible within 61 days. The major soil residues are parent compound, 2,6-dichlorobenzamide and unextractable residues. 相似文献
37.
Mazumder Mohammad Abu Jafar Chowdhury Imran Rahman Chowdhury Shakhawat Al-Ahmed Amir 《Environmental science and pollution research international》2022,29(36):54432-54447
Environmental Science and Pollution Research - A solid polymer, poly[(sodium methacrylate)-co-2-(methacryloyloxy)ethyl acetoacetate], p(MAA-co-MEAA) was synthesized and then grafted onto carbon... 相似文献
38.
Biswas Manik Chandra Jony Bodiuzzaman Nandy Pranab Kumar Chowdhury Reaz Ahmed Halder Sudipta Kumar Deepak Ramakrishna Seeram Hassan Masud Ahsan Md Ariful Hoque Md Enamul Imam Muhammad Ali 《Journal of Polymers and the Environment》2022,30(1):51-74
Journal of Polymers and the Environment - Recently, the advantages of biopolymers over conventional plastic polymers are unprecedented, provided that they are used in situations in which they raise... 相似文献
39.
A review of gravity currents formed by submerged single-port discharges in inland and coastal waters
In this paper, the authors review the current state of the science on the dynamics of gravity currents generated by positively and negatively buoyant jet discharges from submerged round outfalls (i.e., a point source) in inland and coastal waters. Specifically, this article focuses on describing gravity currents occurring at both the bottom boundary and the free surface of the receiving fluid. The manmade discharge operations generating both types of gravity currents and their significance to sustainability of the surrounding hydro-environment are first described. The authors then summarize the flow regimes characteristics of these discharges before becoming gravity currents and how those flow regimes influence the dynamics of the gravity currents. The gravity current dynamics in the calm receiving waters are then analyzed. This analysis is followed by an analysis of the influence of the hydrodynamic forces (e.g., currents, turbulence, waves) on the dynamics of gravity currents. Finally, the authors review quantitative modeling approaches for different forms of gravity current, and identify the current knowledge gaps and research needs. 相似文献
40.
Chakraborty Arindam Aziz Chowdhury Atif Bhakat Kiron Islam Ekramul 《Environmental geochemistry and health》2019,41(5):1953-1966
Environmental Geochemistry and Health - Comprehensive studies on the effect of arsenic (As) on free-living diazotrophs that play a crucial role in soil fertility by nitrogen fixation are still... 相似文献