Results 81 to 90 of about 78,527 (268)
Jingshui jishu【目的】作为重要水资源之一，地下水水源在城市供水系统中发挥着重要作用，随着人们对高品质饮用水需求的不断提升，地下水硬度较高问题受到关注。为提升居民的饮用体验和生活幸福感，许多现状水厂通过新增深度处理工艺，降低水厂出水硬度以提升供水水质。【方法】文章对某地下水水厂采用双膜法去除硬度的相关设计要点展开探究，包括提标改造工艺、工艺流程的制定，设计规模、出水指标等主要设计参数的确定，以及针对改造重难点提出的解决措施。【结果】超滤膜、纳滤膜前分别设置200μm自清洗过滤器、5μm保安过滤器 ...
Wang Guodong +3 more
doaj +1 more source
PROVIDING URBAN ENVIRONMENTAL SERVICES IN DEVELOPING COUNTRIES [PDF]
Environmental Economics and Policy,
Porter, Richard C.
core +1 more source
Coastal area management in South Asia: a comparative perspective (Background Paper prepared for South Asia Workshop on Fisheries and Coastal Area Management, 26 September-1 October 1996, Madras, India) [PDF]
, 1996 Most of the world's fisheries and fishing communities are supported by coastal areas. Consequently, the well-being and future of the fishery sector depend on the health of the coastal ecosystem.
Sharma, Chandrika
core
Environmental Toxicology, EarlyView.ABSTRACT Urban coastal lagoons are highly vulnerable ecosystems increasingly affected by metal contamination, as well as multiple anthropogenic stressors. This study evaluated ecotoxicological and human health risks associated with chronic metal exposure in Nile tilapia (Oreochromis niloticus) from an anthropogenically impacted lagoon in southeastern ...
Julia Araújo Alves +8 more
wiley +1 more source
Jingshui jishu【目的】在平原河网地区，城市生活污水处理厂进水负荷高、进水浓度低的现象普遍存在。【方法】为精准识别与定位污水管网入流入渗问题，本文以长江中下游典型平原河网城市的某一污水系统为例，将污水分区作为研究单元开展应用研究，充分挖掘自来水售水数据价值，构建基于售水数据空间解析的“分区供排水平衡分析-空间水质分析-溯源排查”三级递进式污水管网入流入渗问题诊断技术体系。【结果】污水处理厂片区整体污清比为1.51,除Z泵站片区外，其余各污水分区的污清比均超过1.50,外水过多 ...
Zhu Chunwei +6 more
doaj +1 more source
CARETS: A prototype regional environmental information system. Volume 10: Environmental problems in the coastal and wetlands ecosystems of Virginia Beach, Virginia [PDF]
There are no author-identified significant results in this ...
Alexander, R. H. +2 more
core +1 more source
Environmental Toxicology, EarlyView.ABSTRACT This study assessed the ecotoxicological effects of treated sewage on the freshwater planarian Girardia tigrina, integrating biochemical, energetic, and behavioral biomarkers. Planarians were exposed for 48 h to different concentrations of treated sewage (12.5%, 25%, 50%, and 100%) and compared to controls using commercial water and water from
Renata M. P. Freitas +3 more
wiley +1 more source
Jingshui jishu【目的】随着我国“30·60”“双碳”目标的推进，低碳、零碳及负碳技术不断涌现，准确评估这些新兴技术的发展前景并优化其发展路径则显得至关重要。前瞻性全生命周期评价(LCA)已被证实能有效评估新兴技术并指导其早期开发，可以被用于水处理领域新兴技术的评估与分析。【方法】本文对前瞻性LCA在水处理领域的现有案例进行选取梳理，主要分析了前瞻性LCA的建模过程，包括功能单位、系统边界、前景和背景数据的建立以及数据的不确定性与敏感性分析。【结果 ...
Zou Maojun, Yang Xuejing, Zhang Jinyang
doaj +1 more source
Environmental Toxicology, EarlyView.ABSTRACT The current study aimed to quantify the antimicrobials amoxicillin (AMX), cefazolin (CFZ), chloramphenicol (CHL), metronidazole (MTZ), and sulfamethoxazole (SX) in effluents and surface water of an important Cerrado river, calculate their half‐lives, and analyze their ecotoxicity following single and combined exposures.
Náthala Maria Simão +12 more
wiley +1 more source
基于高分辨质谱的靶向/拟靶向联合评估原水中挥发性有机物的环境风险
Jingshui jishu【目的】本文旨在基于高分辨质谱靶向定量与拟靶向筛查相结合的分析方法，系统分析广东省某水源河段在枯水期、平水期和丰水期水体中挥发性有机物(VOCs)的污染特征，并评估其环境风险。【方法】本文采用吹扫捕集结合气相色谱-三重四极杆串联质谱仪定量分析水中60种VOCs,通过顶空提取结合气相色谱-四级杆飞行时间质谱建立了水体中196种VOCs的拟靶向筛查方法，以此实现对研究河段不同水期VOCs的全面检测与量化。【结果】靶向定量分析检出14种VOCs,其质量浓度为0.001～16.363μg ...
Huang Donglong +3 more
doaj +1 more source