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161.
由文辉 《生态与农村环境学报》1997,(3)
淀山湖是上海市唯一的淡水湖泊,面积约62km2。淀山湖湿地的形成主要是地质、地貌、气候、水文等自然因素和人类活动影响长期相互作用的结果。本文着重讨论了淀山湖湿地的生产功能和环境生态功能,并对湖泊湿地的利用与保护提供了建议。 相似文献
162.
Min Sun Risheng Yao Yahua You Shengsong Deng Wenxia Gao 《Frontiers of Environmental Science & Engineering》2007,1(1):95-98
This paper reports on the degradation of 4-aminophenol using hydrogen peroxide as oxidizer and the enzyme from Serratia marcescens AB 90027 as catalyst. The effecting factors during degradation and the degrading mechanism were studied. Also, the location of the enzyme in the cell, which could catalyze the degradation of 4-aminophenol, was analyzed. The results showed that to degrade 50 mL of 4-aminophenol whose concentration was 500 mg/L, the optimal conditions were: volume of H2O2 = 3 mL, temperature = 40–60°C and pH = 9–10. In the degradation process, 4-aminophenol was first converted to benzoquinone and NH3, then organic acids including maleic acid, fumaleic acid, and oxalic acid were formed, and then finally CO2 and H2O were generated as final products. The enzyme that could catalyze the degradation of 4-aminophenol was mainly extracellular enzyme. 相似文献
163.
Humic acids, especially FA in fractions, contain more oxygen functional groups. In this experiment, on the basis of confirming the action of humic acids on KBD, what was studied is the biological effects of one of main oxygen functional groups, hydroxy group (-OH). The results indicate that inducing pathologic process of KBD, obviously decrease the GSH-Px activity and induce peroxidation membrane injury of tissue. The SOD activity increase in the tissues caused by oxygen functional groups showed that enhancing of free radical reaction should not be neglected. 相似文献
164.
IntroductionThestudyofmodernsoilzoologyhasenteredintoastageofbiologicalproductivityandtherelationbetweenhumanandenvironment.P?.. 相似文献
165.
散化码头化学品水污染危害性评估模式研究 总被引:3,自引:0,他引:3
提出散化码头三类典型液体化学品水污染危害性评估模式 ,并建立其计算扩散模型。 相似文献
166.
对博尚水库的水质现状、富营养状况、年内变化、年际变化及主要污染物质入库量分析评价,找出污染特性,并针对污染特性提出相应的建议。 相似文献
167.
在水资源日趋紧张的今天,污水的深度处理回用工艺成了人们探讨的热点。结合郑州市五龙口污水处理厂的设计与运行,介绍了以改良氧化沟为主体的污水深度处理回用工艺,并对工艺除磷脱氮及污水深度处理的原理、设计参数、运行情况及运行条件的控制进行了介绍。运行结果表明该工艺既具有较高的COD、SS去除效率,又解决了传统氧化沟在脱氮除磷时存在相互影响的矛盾问题,在进水COD为326mg/L、SS为301mg/L、NH_4~+-N为45.1mg/L、TP为4.1mg/L;出水COD为21mg/L、SS为9mg/L、NH_4~+-N为1.4mg/L、TP为0.6mg/L,各项指标均达到了景观用水标准。 相似文献
168.
Mitigation and Adaptation Strategies for Global Change - The reduction of urban heat island (UHI) and carbon emission is of great importance for thermal environment of urban residential areas. This... 相似文献
169.
170.
Lin Zhu Ya Wang Taotao He Liangjun You Xiangqian Shen 《Journal of Polymers and the Environment》2016,24(2):148-158
Removal of toxic pollutants from water and wastewater is becoming an important process with the increase of industrial activities. The present study focused on assessing the suitability and efficiency of water bamboo leaves (WBL) for the removal of cationic dye from aqueous solutions. The effect of different variables in the batch method including solution pH (2–12), initial dye concentration (50–250 mg L?1), adsorbent dose (0.05–0.30 g), contact time (5–180 min) and temperature (283–333 K) on the dye removal was investigated. The adsorption kinetics was discussed in view of four kinetics models. The results showed that the pseudo-second-order kinetics model described dye adsorption on WBL very well. The experimental equilibrium data were also tested by four isotherm models. It was found that adsorption of dye on WBL fitted well with the Langmuir isotherm model, implying the binding energy on the whole surface of the adsorbent was uniform and the dye molecules onto the surface of the adsorbent were monolayer coverage. Calculation of various thermodynamic parameters of the adsorption process indicated feasibility and exothermic nature of dye adsorption. 相似文献