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731.
Guilin Li Yanming Zhang Yong Ni Ying Wang Baohua Xu Xingqi Guo 《Die Naturwissenschaften》2018,105(3-4):24
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ABSTRACT: This paper uses the grey fuzzy multiobjective programming to aid in decision making for the allocation of waste load in a river system under versatile uncertainties and risks. It differs from previous studies by considering a multicriteria objective function with combined grey and fuzzy messages under a cost benefit analysis framework. Such analysis technically integrates the prior information of water quality models, water quality standards, wastewater treatment costs, and potential benefits gained via in‐stream water quality improvement. While fuzzy sets are characterized based on semantic and cognitive vagueness in decision making, grey numbers can delineate measurement errors in data collection. By employing three distinct set theoretic fuzzy operators, the synergy of grey and fuzzy implications may smoothly characterize the prescribed management complexity. With the aid of genetic algorithm in the solution procedure, the modeling outputs contribute to the development of an effective waste load allocation and reduction scheme for tributaries in this subwatershed located in the lower Tseng‐Wen River Basin, South Taiwan. Research findings indicate that the inclusion of three fuzzy set theoretic operators in decision analysis may delineate different tradeoffs in decision making due to varying changes, transformations, and movements of waste load in association with land use pattern within the watershed. 相似文献
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Youwu Hao Yang Zhang Hongfei Ni Jufang Gao Yun Yang Wenping Xu 《Journal of environmental science and health. Part. B》2013,48(9):737-744
Glyphosate-based herbicides are broad-spectrum pesticides widely used in the world, which is considered a highly safe pesticide due to their target specificity, but recently, there has been an ongoing controversy regarding their carcinogenicity and possible side effects of glyphosate on human health. Commercial glyphosate-based herbicides (GBHs) consist of declared active ingredient (glyphosate salts) and a number of formulants such as ethoxylated formulants (4130®, 3780®, and A-178®). The aim of our study is to investigate whether the toxicity of GBHs is related to formulants. The effects of GBHs on human health were studied at the cellular level based on their toxicity to liver, lungs and nerve tissue. The inhibitory toxicity to cell viability by GBHs was examined with cell-based systems using three human cell lines: HepG2, A549, and SH-SY5Y. Data obtained showed that all tested ethoxylated formulants and their mixtures with declared active ingredient glyphosate isopropylamine salt (GP) have significant inhibitory effect on cell proliferation, while the declared active ingredient has no significant toxicity. Our study demonstrates that the toxic effect of GBH is primarily due to the use of formulants. This result suggests that GP is relatively safe and a new approach for the assessment of toxicity should be made. 相似文献
738.
一株无色杆菌属菌株对孔雀绿的脱色降解 总被引:4,自引:0,他引:4
从孔雀绿污染土壤中分离筛选出1株对孔雀绿染料有强脱色能力的菌株MGT3,根据其形态学特征和生理生化鉴定以及16S rDNA序列分析,初步鉴定为无色杆菌属(Achromobacter sp.)的菌株.在振荡培养条件下对该菌株的脱色反应条件进行了研究,结果表明,MGT3菌株的最适脱色pH为7,最适脱色温度为30℃,孔雀绿初始浓度小于50 mgL-1时有最佳脱色率,在最适脱色条件下脱色8 h,孔雀绿脱色率可达到90%以上,利用薄层层析法、紫外-可见分光光度计法、高效液相色谱法对孔雀绿脱色代谢产物进行了分析,结果表明,孔雀绿在脱色过程中被降解,生成了其他代谢产物.图8表1参26 相似文献
739.
概述了废水处理中生物填料的应用现状和发展,首先介绍了常用填料,如定型固定式填料、悬挂式填料及分散型填料在废水处理中的应用,其次以亲水、生物亲和及生物亲和亲水磁性填料为代表,对新型填料在废水处理中的应用作了阐述。 相似文献
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