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排序方式: 共有85条查询结果,搜索用时 15 毫秒
1.
Wu Jianxin Feng Ziwei Tang Kai 《Environmental science and pollution research international》2021,28(24):30626-30641
Environmental Science and Pollution Research - This paper examines urban environmental performance using a unique database of 286 Chinese cities for the period 2002–2014. Both the dynamics of... 相似文献
2.
Ying Wang Juying Wang Jingli Mu Zhen Wang Ziwei Yao Zhongsheng Lin 《Environmental science and pollution research international》2014,21(1):148-158
Predicted no-effect concentration (PNEC) is often used in ecological risk assessment to determine low-risk concentrations for chemicals. In the present study, native marine species were selected for toxicity testing. The PNECs for three polycyclic aromatic hydrocarbons (PAHs), specifically phenanthrene (Phe), pyrene (Pyr), and benzo[a]pyrene (BaP), were derived from chronic and acute toxicity data with log-normal statistical methods. The achieved PNECs for Phe, Pyr, and BaP were 2.33, 1.09, and 0.011 μg/L, respectively. In Jinzhou Bay and the Shuangtaizi River Estuary of Liaodong Bay in the Bohai Sea, China, the surface water concentrations of the three PAHs were analyzed by gas chromatography–mass spectrometry. Based on two probabilistic ecological risk assessment (PERA) methods, namely probabilistic risk quotient and joint probability curve, the potential risk of Phe, Pyr, and BaP in Jinzhou Bay and Shuangtaizi River Estuary was assessed. The same order of ecological risk (BaP > Phe > Pyr) was found by both models. Our study considered regional characteristics of marine biota during the calculation of PNECs, and the PERA methods provided probabilities of potential ecological risks of chemicals. Within the study area, further research on BaP is required due to its high potential ecological risk. 相似文献
3.
Jiachuang Shao Penghui Shao Mingming Peng Min Li Ziwei Yao Xiuqin Xiong Caiting Qiu Yufan Zheng Liming Yang Xubiao Luo 《Frontiers of Environmental Science & Engineering》2023,17(3):33
4.
城市生态环境保护是生态文明建设的重要组成部分之一,而餐厨垃圾是影响城市生态环境的一种主要污染源,因此,有效处理餐厨垃圾也是当前城市生态环境保护的重要内容。本文以重庆市为例,针对其特殊的餐厨垃圾组成成分,调查分析了其主城区餐厨垃圾污染状况及处理难点,提出了3种主要处理方案情景并进行综合效益评价。结果表明建立餐厨垃圾小型处理站是最优方案,其成本效益核算结果说明当政府基金和垃圾产量有限时,也可采用缩小处理站规模以达到最高的组合效益。 相似文献
5.
城市地区突发自然灾害常常会对给水排水设施造成不利影响。飓风“桑迪”于2012年10月29日登陆美国,多个东部城市出现大面积停电,缺水,交通中断以及罕见的城市内涝,造成重大人员伤亡和巨额财产损失,严重地影响了当地人们正常的生产和生活。从飓风“桑迪”对美国城市给水和排水系统造成的巨大破坏出发,并结合当地政府采取的紧急应对措施展开讨论,总结其中的经验教训及启示。 相似文献
6.
Xuejun Guo Kunpeng Wang Mengchang He Ziwei Liu Hailin Yang Sisi Li 《环境科学学报(英文版)》2014,26(7):1549-1556
A large amount of solid waste has been produced by the antimony smelting process in the"World Capital of Antimony", Xikuangshan area in China. This study comprehensively investigated the physical and chemical characteristics of the various solid wastes, as well as the leaching behavior of the solid wastes, which included water-quenched slag,arsenic-alkali residue, desulfurized slag and blast furnace dust. These four types of waste were enriched in a variety of heavy metals and metalloids and more specifically with As and Sb levels up to 8.6 × 104 and 3.16 × 105mg/kg, respectively, in arsenic-alkali residue. For desulfurized slag and water-quenched slag, the leaching concentration of Sb significantly exceeded the acceptable limits during the leaching tests using the toxicity characteristic leaching procedure and the synthetic precipitation leaching procedure. In addition, As leaching in arsenic-alkali residue was extraordinarily hazardous, being three orders of magnitude higher than the regulatory level of As. According to the results of the extraction tests, all the tested wastes were classified as hazardous waste. 相似文献
7.
The presence of pharmaceuticals in aquatic environments poses potential risks to the ecology and human health. This study investigated the removal of three widely detected and abundant pharmaceuticals, namely, ibuprofen (IBU), diclofenac (DC), and sulfadiazine (SDZ), by two magnetic ion-exchange resins. The adsorption kinetics of the three adsorbates onto both resins was relatively fast and followed pseudo-second-order kinetics. Despite the different pore structures of the two resins, similar adsorption patterns of DC and SDZ were observed, implying the existence of an ion-exchange mechanism. IBU demonstrated a combination of interactions during the adsorption process. These interactionswere dependent on the specific surface area and functional groups of the resin. The adsorption isothermfittings verified the differences in the behavior of the three pharmaceuticals on the two magnetic ion-exchange resins. The presence of Cl- and SO42- suppressed the adsorption amount, butwith different inhibition levels for different adsorbates. This work facilitates the understanding of the adsorption behavior andmechanismof pharmaceuticals onmagnetic ion-exchange resins. The results will expand the application of magnetic ion-exchange resins to the removal of pharmaceuticals in waters. 相似文献
8.
宋子炜 《环境与可持续发展》2015,40(2):85-87
铁路建设生态影响主要体现在生态敏感区受损、生态系统服务功能降低、生态景观破碎加剧等方面,本文通过剖析基于全线生态影响的设计方案评价的内涵与特点,采用三角模糊数、生态系统服务功能价值理论等技术方法,建立了基于全线生态影响的方案评价模型,可从全线生态保护角度,为铁路设计方案的优化评价提供参考依据,对于路域生态保护决策提供了新思路。 相似文献
9.
为了研究曝气池空间内水质的分布及变化规律,采用了YSI6600 V2多参数水质检测仪对成都市三瓦窑污水处理厂的一期工程传统污泥法(CAS)、二期工程缺氧、好氧和内源呼吸(AOE)工艺中的曝气池分别进行了包括DO、NH3-N、NO3--N、pH、氯化物和温度等水质指标的场的检测,通过分析这些数据,揭示了曝气池内部水质变化的规律,并比较了CAS工艺与AOE工艺内水质处理效果的差别。结果表明,(1)溶解氧沿池深方向呈现出一定的分布规律,CAS工艺中随池深增加,溶解氧增加,AOE工艺中随着池深的增加,溶解氧降低;(2)AOE工艺对氨氮在O区的去除率可达97.64%,明显高于CAS工艺的41.76%;(3)沿曝气池长度测量溶解氧空间分布规律,参照理论曲线及依据水质处理要求,调整曝气量的方法具有长期运行经济、水质处理效果好的特点。 相似文献
10.
Zou Ziwei Yang Lu Liu Yuan Zhang Yue Cao Dandan Du Ziwen Jin Jie 《Environmental science and pollution research international》2023,30(8):19907-19917
Environmental Science and Pollution Research - The removal and recovery of uranium (VI) from water solutions are critical for energy and environmental security. In this study, hydrochar at 100,... 相似文献