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401.
Guo Junkang Cao Geng Ren Qian Xu Huiyun Ren Xinhao Jia Honglei Hua Li Wei Ting Yu Shenghui 《Environmental science and pollution research international》2021,28(11):13487-13494
Environmental Science and Pollution Research - Ionic liquids (ILs) are solvents composed of ions, containing a large asymmetric cation with an anion. With increasing and widespread applications,... 相似文献
402.
通过对青藏铁路沿线(那曲-拉萨段)地热资源的调查,发现该段在直线距离不足240km,离铁路最远不超过55km的区域内,出露的地热显示区(点)近40处,目前开发利用的有5处,开发率不足13%,开发利用方向主要为洗浴和发电。通过对沿线地热能开发利用现状分析研究,得出沿线地热能开发利用中存在的主要问题有:(1)开发利用不合理;(2)综合利用率低;(3)环境地质问题严重;(4)深部地热资源勘探不足尤其是高温干热岩的勘探不足等问题。 相似文献
403.
404.
某油田利用千化池蒸发处理联合站排放的含油污水,部分干化池存在轻微渗漏,下渗的污水会对地下水产生污染。为掌握污染物在地下水中的迁移转化规律,建立含油废水的一维竖向迁移模型,并利用Hydrus-1D计算程序对地下水中污染物浓度随时间、运移距离衰减的情况进行模拟分析。分析结果对于控制干化池含油废水中石油类污染物对地下水环境的污染具有一定的参考价值。 相似文献
405.
建立了全自动甲基汞分析仪测定水源水中甲基汞的方法,过程简单,可获得较理想的结果.实验采用直接法测定水源水中的甲基汞含量,优化仪器分析条件;在0 ~1 000 pg的范围内,标准工作曲线线性良好;仪器检测限达到0.003 ng/L,低于水源水中限量要求;实际水样加标回收率在86.5% ~935%之间;标准样品分析合格;测定标准样品的相对误差为1.4%;运用适当的质控手段,可较好的满足水源水中痕量甲基汞的测定需求. 相似文献
406.
以大连市为研究区域,构建人文因素对区域生态系统影响的指标体系、评估模型及评估标准,基于状态空间法,从区域资源、区域环境、人文因素三个维度对大连市2002-2012期间47个指标,评价人文因素对生态环境的影响。结果表明:近十二年来,大连市人文因素对生态环境的影响综合指数几乎都在临界值以下,即处在影响适度范围内,总体上达到了可持续发展的要求,但是与青岛市相比,大连市还应该加强生态环境保护的力度,避免在以后的发展中受到环境的制约。 相似文献
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408.
The rapidly growing industrial activities in emerging economies such as China have been causing resource depletion and pollution problems. This reality requires China to adopt an integrated management approach to resolve the conflict between industrial development and environmental protection, and the concept of circular economy (CE) serves this purpose. In this paper, we examine if different types of manufacturing enterprises on environmental-oriented supply chain cooperation (ESCC) exist. We also determine if the Chinese manufacturer types varying in ESCC differ in their implementation of the CE practices towards achieving the CE-targeted goals on improving both environmental and economic performance. Our cluster analytic results with multivariate analysis of variance (MANOVA) among the four identified types of Chinese manufacturers varying in environmental-oriented supply chain cooperation highlight the importance to intensify the cooperation with upstream and downstream supply chain partners for a CE initiative to succeed. 相似文献
409.
Jie Liu Fan Chen Haiqing Geng Xinxin Qiu Binbin Cai 《Frontiers of Environmental Science & Engineering》2010,4(3):349-360
The major features of different road sections were identified. Methods quantitatively determining the ecological impact of highway construction were discussed, and a demonstration was presented. The Dabao highway (from Dali to Baoshan) and the Sixiao highway (from Simao to Xiaomengyang) passing through the Longitudinal Range-Gorge Region were used as examples in this paper. For the normal road sections having no important species to protect, a method of ecosystem health assessment was introduced to calculate the overall range of the ecological impact of highway construction. For the road sections having plants or soils of interest, indexes were selected and the range of impact was determined using mathematical methods such as regression analysis and variance analysis. The range of impact on animal populations was also discussed in terms of the minimum living areas required by animal populations and the fragmentation caused by highway construction. The results indicate that the zones impacted by highway construction were composed of both regular and anomalous figures, the range of impacts for different landforms of the two sample highways were substantially different; highway construction had dramatic effects on roadside ecosystem health; the impact on soil factors of farmland was greater than 200 m, and the distance may exceed 1000 m when important large animals were considered. 相似文献
410.
Jinju Geng Qiang Wang Xiaojun Niu Xiaorong Wang 《Frontiers of Environmental Science & Engineering》2007,1(1):120-124
Effects of pH, temperature, and oxygen on the production and release of phosphine in eutrophic lake sediments were investigated under laboratory tests. Results indicated that the elimination of matrix-bound phosphine was accelerated under initial pH 1 or 12. Phosphine levels could reach maximum under initial pH 10. The contents of phosphine increased with the addition of alkali under pH 4–12. The rates of phosphine production and release from lake sediments varied with temperature. 20°C was the most favorable temperature for the production of matrix-bound phosphine. Oxygen showed little effect on matrix-bound phosphine. Matrix-bound phosphine concentrations in lake sediments were concluded to be dependent on a balance of natural generation and depletion processes. 相似文献