排序方式: 共有71条查询结果,搜索用时 15 毫秒
61.
Md. Abul Hashem Md. Shahruk Nur-A-Tomal Nil Ratan Mondal Md. Aminur Rahman 《Environmental Chemistry Letters》2017,15(3):501-506
Heavy metals in the environment may be toxic for human and animals. Tanneries are a source of pollution by heavy metals. There is little information on heavy metals pollution in tanneries, especially on metals produced by the process of hair burning and liming. Liming is the first stage of chemical treatment where animal hair or wool is removed with sodium sulphide and calcium oxide. Here we studied cow, goat, buffalo and sheep hair, conventional liming agents and liming wastewaters from several sources. Samples were acid-digested and aliquots were analysed by atomic absorption spectroscopy following APHA standard method to measure concentrations of arsenic, lead, cadmium, zinc, manganese and iron. Results show that the range of metal contents in hair or wool and liming agents are 1.3–8.2 mg/kg for arsenic, 0.02–21.8 mg/kg for lead, 17.7–121.0 mg/kg for manganese, 7.3–141.1 mg/kg for zinc and 119.6–10613.8 mg/kg for iron. Liming wastewaters contain 1.9–5.6 µg/L arsenic, 0.03–6.05 µg/L lead, 38.6–139.0 µg/L manganese, 144.0–171.5 µg/L zinc and 399.5–1069.0 µg/L iron. Cadmium was below detection limits. This is the first investigation that reveals that hair burning liming operation is a potential source of heavy metals in the environment. 相似文献
62.
Pal Madhubonti Mondal Mrinal Kanti Paine Tapan Kanti Pal Parimal 《Environmental science and pollution research international》2018,25(17):16579-16589
Environmental Science and Pollution Research - A novel graphene-based nanocomposite membrane was synthesized by interfacial polymerization (IP) through chemical bonding of the graphene oxide (GO)... 相似文献
63.
Soumya Chattoraj Bikash Sadhukhan Naba K. Mondal 《Journal of environmental science and health. Part. B》2013,48(8):626-636
This study was undertaken to investigate the adsorption capacity of carbaryl on four Indian soils with different physiochemical properties. A batch adsorption study was carried out in order to evaluate the maximum adsorption capacity of carbaryl using a Response Surface Methodology (RSM). The effects of operating parameter such as initial carbaryl concentration (1–20 mgL?1), adsorbent dosage (0.5–6 g) and contact time (10–180 min) were examined. The proposed quadratic model for Box-Behnken design fits very well to the experimental data because it may be used to navigate design space according to ANOVA results. The regression co-efficient (R2) of the models developed and the results of validation experiments conducted at optimal conditions strongly suggests that the predicted values are in good agreement with experimental results. Contour and response surface plots are used to determine the interactions effects of main factors and optimal conditions of the process. The experiment can be utilized as a guideline for better understanding of carbaryl adsorption onto soil under different operating conditions. The results show that the forest soil is most efficient in binding carbaryl (Sevin) than the other types of soil tested. 相似文献
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65.
Rashidul Alam Mubarak A. Khan Ruhul A. Khan Sushanta Ghoshal M. I. H. Mondal 《Journal of Polymers and the Environment》2008,16(3):213-219
Chitosan films were prepared from dried prawn shell via chitin and then tensile properties like tensile strength (TS) and
elongation at break (Eb) of the films were evaluated. Six formulations were developed using methyl methacylate (MMA) monomer
and aliphatic urethane diacrylate oligomer (M-1200) in methanol along with photoinitator (Darocur-1664). Then the films were
soaked in the formulations and irradiated under UV radiation at different doses for the improvement of physico-mechanical
properties of chitosan films. The cured films were characterized by measuring TS, Eb, polymer loading (PL), water absorption
and gel content properties. The formulation containing 43% MMA and 15% oligomer in methanol solution showed the best performance
at 20th UV pass for 4 min soaking time. 相似文献
66.
Karnatak Gunjan Das Basanta Kumar Sarkar Uttam Kumar Borah Simanku Roy Aparna Parida Pranay Lianthuamluaia Lianthuamluaia Das Archan Kanti Behera Bijay Kumar Pandit Arun Sahoo Amiya Kumar Bhattacharjya Birendra Kumar Chakraborty Sangeeta Mondal Kausik Chandra Purna 《Environmental science and pollution research international》2022,29(50):75431-75440
Environmental Science and Pollution Research - The rapid degradation, overexploitation, and encroachment of floodplain wetlands have led to considerable decline in fish diversity and production... 相似文献
67.
Hoque Md. Sazedul Tamanna Fatema Hasan Md. Mahmudul Al Banna Md. Hasan Mondal Pronoy Prodhan Mohammad Dalower Hossain Rahman Md. Zillur van Brakel Martin Louis 《Environmental science and pollution research international》2022,29(14):20112-20127
Environmental Science and Pollution Research - The chemical contaminants in dried fish are of great food safety concern and an emerging public health issue in Bangladesh. The aim of this study was... 相似文献
68.
Dutta Neelanjan Mondal Pradip Gupta Anirban 《Journal of Material Cycles and Waste Management》2022,24(3):1182-1193
Journal of Material Cycles and Waste Management - The pyrolytic fuel generated by high-density polyethylene (HDPE) has the potential to replace fossil fuels as a primary source of energy. Thermal... 相似文献
69.
Mondal Jayanta Das Arijit Khatun Rumki 《Environment, Development and Sustainability》2022,24(10):11871-11894
Environment, Development and Sustainability - Climate change is a concerning matter nowadays. It has a long-term effect on human health by spreading vector-borne diseases throughout the world, and... 相似文献
70.
Mondal Md. Shoriful Alam Kitawaki Hidetoshi 《Journal of Material Cycles and Waste Management》2023,25(2):613-627
Journal of Material Cycles and Waste Management - Feasibility of waste-to-energy (WtE) incineration in municipal solid waste (MSW) management is hindered by low lower heating value $$(LHV)$$ . This... 相似文献