Results 61 to 70 of about 78,097 (269)
Sustainable Development, EarlyView.ABSTRACT The dynamic nature of small islands being geographically isolated and their perceived connectedness with global networks complicates research attempts to draw general conclusions on whether insularity leads to marginalization or strengthens their resilience for sustainable development.
Toheeb Lekan Jolaosho +2 more
wiley +1 more source
Jingshui jishu【目的】拉萨河流域作为拉萨市重要的饮用水水源地，其水质状况对区域生态安全与居民健康具有直接而深远的影响。为全面掌握流域水体中重金属污染状况及潜在生态风险，本文在流域内布设了25个采样点，系统监测了锌(Zn)、锰(Mn)、铜(Cu)、铁(Fe)、砷(As)、铝(Al)、铅(Pb)、铬(Cr)和镍(Ni)共9种典型重金属元素的含量及其空间分布特征。【方法】采用内梅罗综合污染指数法和潜在生态风险指数法对水体重金属的污染水平与生态风险进行量化评估 ...
Wang Xiaokan +5 more
doaj +1 more source
Urban nutrient balance for Bankok [PDF]
, 2001 To enhance agricultural sustainability, former linkages between agriculture and urban waste production should be reintroduced. Therefore, to explore the options for recycling of nutrients from mega-cities, a nutrient balance model was developed.
de Vries, Fritz Pennig +2 more
core
The Circular Economy in European Union Supply Chains: A Literature Review
Sustainable Development, EarlyView.ABSTRACT This research aims to analyze the implementation of the circular economy (CE) in European Union (EU) supply chains (SC), highlighting its potential to transform production systems and maximize resource efficiency while minimizing waste. Our study identifies the major trends and advancements in this field, focusing on the barriers that prevent ...
Luis Oswaldo Rodríguez‐Mañay +2 more
wiley +1 more source
Jingshui jishu【目的】文章旨在系统分析光伏企业废水排入园区废水厂后引发的运行问题及其影响机理，为优化处理工艺提供依据。【方法】以某工业园区废水厂(规模为1万m 3 /d,主要采用“水解酸化+厌氧-缺氧-好氧(AAO)+膜生物反应器(MBR)”组合处理工艺)为案例，分阶段监测调试期与稳定运行期的水质水量参数，包括化学需氧量(COD)、总氮(TN)、氨氮、总磷(TP)、盐分、钙离子(Ca 2+ )、硅离子(Si 4+ )、氟离子(F - )及悬浮物质(SS)等指标，并结合膜污染电镜扫描 ...
QIANG Jinfeng +4 more
doaj +1 more source
Making asset investment decisions for wastewater systems that include sustainability [PDF]
, 2006 Effective integrated water management is a key component of the World Water Vision and the way in which aspirations for water equity may be realized. Part of the vision includes the promotion of sustainability of water systems and full accountability for
Ashley, Richard +7 more
core +3 more sources
Systems Research and Behavioral Science, EarlyView.ABSTRACT By combining theories of system thinking with a post‐humanist approach, we established a nexus between human and non‐human systems in the examination of systemic innovation. By doing so, we shed light on the interdependencies that exist between human and non‐human systems and contribute theoretically as well as methodologically to theories on ...
Anna Thomasson +1 more
wiley +1 more source
Jingshui jishu【目的】工厂化循环水养殖系统(RAS)具有占地面积小、耗水量少、管理效率高、产品质量好等优点，是水产养殖的热点和主要发展方向。【方法】本文从水动力学的角度，对大口黑鲈商业化RAS的水头损失进行了计算和分析，并对系统进行了24 h水质跟踪监测，研究了水流状态对水处理系统的影响。【结果】养殖池24 h内氨氮和亚硝酸盐氮的质量浓度分别为1.14～3.56 mg/L和0.72～1.10 mg/L。氨氮浓度随饲料投喂而升高，经生物滤池硝化作用逐渐降低，亚硝酸盐氮浓度相对稳定 ...
JIE Liang, ZHANG Huiying, LI Hua
doaj +1 more source
Safety Science and Technology, EarlyView.The social and natural water circulation causal feedback relationship is established, and an SD model on water supply–demand and water ecological crisis is constructed. The GDP growth rate and the sewage treatment rate are identified as the key factors affecting the system.
Weiwei Song +4 more
wiley +1 more source
超高效液相色谱-串联质谱法快速测定水中19种全氟和多氟化合物
Jingshui jishu【目的】本文建立了一种超高效液相色谱-串联质谱法(UPLC-MS/MS),用于快速测定生活饮用水和水源水中19种全氟和多氟化合物(PFASs)。【方法】试验采用UPLC-MS/MS技术，对水样进行快速直接分析。前处理方法极为简单，仅采用0.22μm再生纤维针式过滤器过滤，省略了传统固相萃取的活化、上样、淋洗和洗脱等繁琐步骤，大幅节约了有机溶剂与样品处理时间。目标物经C 18 色谱柱分离后在电喷雾离子源(ESI)负离子模式下电离，采用多反应监测模式(MRM)进行定性和定量分析检测 ...
REN Yuanyuan +4 more
doaj +1 more source