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101.
102.
通过在北京市野生动物救护中心构建表流湿地与潜流湿地相结合的复合人工湿地处理富营养化水体,研究该复合人工湿地对总氮(TN)、总磷(TP)及水体浊度的去除效果。结果表明:人工湿地对TP的去除效果好于对TN的去除效果,经过人工湿地处理的富营养化水体,表流湿地、潜流湿地和复合人工湿地对TP的平均去除率可分别达42%、55%、60%,对TN的平均去除率分别为27%、30%、34%,对水体浊度的平均去除率分别达43%、55%、75%。复合人工湿地对TP、TN以及浊度的去除效果受水体温度和溶解氧(DO)的影响,通过相关性分析发现,TP、TN和浊度的去除量与水体中的DO水平之间存在显著的负相关性,而与水体温度有正相关性,在显著性水平为0.05的条件下,相关系数分别为-0.829、-0.767、-0.765和0.674、0.757、0.774。复合人工湿地对TP、TN及浊度的去除率高于表流湿地和潜流湿地,表明复合人工湿地具有优于表流湿地和潜流湿地的整体性功能,能有效提高人工湿地对TN、TP以及浊度的去除率。 相似文献
103.
为探讨不同环境因素对TiO2光催化对树脂废水预处理效果的影响,采用响应面法对影响树脂废水Ti02光催化处理过程中的3个主要因素pH、TiO2量及废水初始COD进行优化,并以COD去除率为响应值。经统计学分析和响应面模型建立,确定了悬浮态TiO2光催化处理树脂废水的最佳控制条件为:pH值4.06、TiO2投加量2.45 g/L、初始COD 2 007mg/L。在因素最优组合的条件下,废水COD去除率可达39.8%,与响应面模型最大预测值41%非常接近。与其他物化预处理方式相比,Ti02光催化对废水COD和挥发酚的去除率最高,且对废水生化性有很大提高,具有良好的应用前景。 相似文献
104.
Li Xinsheng Ai Shuo Huang Yongchun Huang Chengdu Yu Wanguo Mao Zhijuan 《Environmental science and pollution research international》2021,28(3):2741-2752
Environmental Science and Pollution Research - Dibenzothiophene (DBT) in fuel oils causes the release of toxic sulfur oxide gases, and it is necessary to remove DBT in fuels. Herein, metallic... 相似文献
105.
Lyu Yang Ren Shan Zhong Fuyong Han Xue He Ying Tang Zhenwu 《Environmental science and pollution research international》2021,28(12):14597-14606
Environmental Science and Pollution Research - Synthetic musk fragrances (SMFs) in aquatic environments have been of increasing concern because of their potential characteristic of persistent,... 相似文献
106.
This study aims to investigate the effect of the impact mechanism of climate change on the livestock production at small watershed level and county level with the Multi-level Model(MLM)in Qinghai Province.The result indicated that the gross livestock output value was greatly influenced by the climatic factors of the small watershed level.Higher temperature promoted also by the increase of precipitation,relative humidity and sunshine duration was found to be beneficial to the development of livestock production,except in some areas where temperature rise restrained the development of local livestock production to some degree when exceeding a certain level;besides,the impact of the socioeconomic factors on the livestock output value is obvious at the county level.The gross economic output measured with GDP has some inhibitory effects on the reinvestment of livestock production,while population growth promotes development of livestock production to some degree.The results not only provide scientific basis for the management of livestock production in Qinghai Province,but also provide reference for formulating the policies and adaptation measures targeted at climate change to promote the sustainable development of livestock production in other regions. 相似文献
107.
异龙湖湿地功能可持续性评价及PSR模型时滞性研究 总被引:2,自引:0,他引:2
基于压力-状态-响应(PSR)框架模型理念,构建了异龙湖湿地生态系统功能可持续性评价的指标体系;同时,基于生态系统健康原理和模糊数学提出了湿地生态系统退化及其可持续性评价方法,研究了20世纪50年代至今异龙湖湿地生态系统功能可持续性变化的过程,包括压力、状态、响应和可持续能力4个方面,并使用偏相关分析和时间平移的方法修正了PSR模型的滞后性.研究结果表明:20世纪50年代至今,异龙湖湿地生态系统的功能可持续能力不断下降,目前逐渐趋于平缓;异龙湖湿地生态系统功能的变化滞后于压力约1~5a,滞后于响应约1~15a. 相似文献
108.
Lyu Lu Khan Irfan Zakari Abdulrasheed Bilal 《Environmental science and pollution research international》2022,29(6):8464-8472
Environmental Science and Pollution Research - Environmental sustainability is increasing emphasis on global environmental concerns at the forefront of public policy debate. This paper investigates... 相似文献
109.
Dissolved organic matter (DOM) is an important constituent of wastewater treatment plant (WWTP) effluent. A novel combined tidal and subsurface flow constructed wetland (TF-SSF-CW) of 90 L was constructed for a ten-month trial of advanced treatment of the WWTP effluent. Excitation emission matrix (EEM) fluorescence spectroscopy, parallel factor (PARAFAC) analysis and a two end-member mixing model were employed to characterize the composition and removal process of the effluent DOM (EfOM) from the WWTP. The results showed that the TF-SSF-CW performed an efficient EfOM removal with dissolved organic carbon (DOC) removal rate of 88% and dissolved organic nitrogen (DON) removal rate of 91%. Further analysis demonstrated that the EfOM consisted mainly of two protein moieties and two humic-like groups; protein moieties (76%) constituted the main content of EfOM in raw water and humic-like groups (57%) became the dominating contributor after treatment. The EfOM from the WWTP was mainly of aquatic bacterial origin and evolved to a higher proportion of terrigenous origin with higher humification in the TF-SSF-CW effluent. A common controlling treatment-related factor for determining the concentrations of the same kind of substances (protein groups or humic-like groups) was revealed to exist, and the ratio of removal rates between the same substances in treatment was calculated. Our study demonstrates that the TF-SSF-CW can be a novel and effective treatment method for the EfOM from WWTPs, and is helpful for understanding of the character of EfOM in wetland treatment. 相似文献
110.
为探究高温作用对泥岩盖层密封性的影响,从理论上剖析储气库盖层产生热应力的3种形式,在室内试验的基础上,分析泥岩在高温环境下力学损伤程度和盖层物性封闭评价指标随温度变化特征.结果表明:高温环境下泥岩整体结构性能降低,400℃左右是泥岩在周期热应力作用下损伤的阈值温度;高温作用会显著改变泥岩盖层物性封闭特征,400℃左右是... 相似文献