Results 31 to 40 of about 1,855 (160)
Review of Policy Research, Volume 42, Issue 6, Page 1496-1508, November 2025.ABSTRACT This study adopts a policy‐centric perspective to explore the complex relationship between sustainable nitrogen management (SNM) and the health risks associated with unsafe drinking water. The critical policy challenge lies in balancing the essential role of nitrogen fertilizers in achieving high agricultural productivity with their ...
Mingean Park +3 more
wiley +1 more source
Combined Pollution in Drinking Water Caused by Agrichemicals and Veterinary Drugs and the Reducement via Water Treatment Process [PDF]
, 2014 农药在防治病、虫、草害方面的作用必不可少，而随着畜禽、水产养殖业的快速发展，兽药的种类和用量也日益增加。在生产和使用过程中，长期、大量使用的农药兽药通过各种途径进入水环境，从而引起水环境污染，直接或间接威胁着水生生态系统、饮用水安全和水产品安全，最终威胁到食物链顶端的人类的健康。 本研究针对2014年7月饮用水源中的农药兽药残留在自来水厂水处理工艺环节中的浓度变化情况，分析研究饮用水源中农药兽药的复合污染状况。选择目标农药286种，目标兽药79种，分别以液-液萃取法（LLE）和固相萃取法（SPE ...
谢英剑
core
Implications of Tobacco Use on Pathogen‐Driven Diseases: A Public Health and Policy Perspective
World Medical &Health Policy, Volume 17, Issue 3, Page 468-474, September 2025.ABSTRACT The tobacco epidemic remains one of the most significant global public health challenges, responsible for over 8 million deaths annually, with a substantial portion occurring among non‐smokers exposed to second‐hand smoke. While cigarette smoking remains the most prevalent form of tobacco use worldwide, the rise of electronic nicotine delivery
Nadine Kabbani, James L. Olds
wiley +1 more source
Shuitu Baochi Xuebao, 2006 采用回归正交设计方案，研究了Cd、Cu、Ni复合污染对6种土壤酶（脲酶、转化酶、蛋白酶、磷酸酶、过氧化氢酶、脱氢酶）活性的影响。结果表明：6种土壤酶活性与Cd，Cu，Ni复合污染之间均呈显著或极显著的相关关系，但Cd，Cu，Ni复合污染对各种土壤酶活性的影响存在着明显差异。在复合效应影响中，重金属对土壤酶活性的抑制效应顺序为：Cd〉Cu〉Ni，Cd，Cu对土壤酶的活性多表现为抑制作用，而Ni多表现为激活作用，Cd，Cu，Ni对磷酸酶均表现出一定的激活效应。Cd，Cu ...
罗虹, 刘鹏, 宋小敏
doaj
Effects of Bap and Cr(Ⅵ)on the Growth and Ecophysiology of Mangrove Kandelia candel Seedlings [PDF]
, 2008 在玻璃温室、自然透光下采用人工砂基栽培，研究Bap、Cr和二者的复合污染在不同浓度梯度和不同胁迫时间下，对红树植物秋茄（Kandeliacandel）幼苗的生长及生理生态效应的影响。设置Bap的系列胁迫浓度为100、200、300、400、800µg·L-1，以不加Bap为对照；Cr6+的系列胁迫浓度为0.5、2.5、5、10、25、50、100mg·L-1，以不加Cr6+为对照；Bap和Cr的复合胁迫浓度为100、200、300µg·L-1Bap分别与5、10、25mg·L ...
王铮敏
core
Threats posed by land use to water quality in South Africa's strategic water source areas
World Water Policy, Volume 11, Issue 1, Page 155-164, February 2025.Abstract Understanding the negative impacts of land use/land cover (LULC) on water quality is key to developing effective integrated catchment management strategies. However, in line with the Integrated Water Resources Management (IWRM) philosophy, this necessitates the generation and application of useful scientific knowledge, which stakeholders and ...
Kent Anson Locke, Kevin Winter
wiley +1 more source
Simultaneous determination of 87 pesticides in river water and seawater using solid phase extraction-gas chromatography-mass spectrometry [PDF]
, 2012 采用固相萃取-气相色谱-质谱联用技术,建立了河水和海水中87种农药(24种有机磷、15种有机氯、12种唑类、9种拟除虫菊酯类、5种氨基甲酸酯类、7种酰胺类及15种其他新型农药)的多残留同时分析方法。优化了影响分离效果和灵敏度的仪器参数,考察了固相萃取柱柱型及水样体积、PH、盐度的影响,采用nH2柱优化了净化效果,内标法和替代物法用于数据的质量控制。结果表明:在最佳条件下,各目标农药的方法检出限为0.1~6.6ng/l;以实际河水和海水为基底,在5 ng/l和20 ng/l的加标水平下 ...
孙广大 +4 more
core
Multiple‐stressor effects on leaf litter decomposition in freshwater ecosystems: A meta‐analysis
Functional Ecology, Volume 38, Issue 7, Page 1523-1536, July 2024.Read the free Plain Language Summary for this article on the Journal blog. Abstract Recent years have witnessed a surge in research on the effects of multiple stressors in freshwater ecosystems. While studies have increased, the synthesis of their findings into a broader understanding of ecosystem‐level effects remains an ongoing endeavour. Leaf litter
Graciela Medina Madariaga +6 more
wiley +1 more source
Shuitu Baochi Xuebao, 2006 通过盆栽实验研究了酸雨影响下紫色土Zn-Cd复合污染对莴笋的影响。结果表明：酸雨影响下，Zn为低水平时，Zn-Cd复合污染对莴笋表现为拮抗增产；Zn为高水平时，复合污染对莴笋表现为协同减产。重金属累积量在Zn-Cd复合污染时表现为Cd对Zn的作用和Zn对Cd的作用恰好相反：在Zn为低浓度时，Zn促进了莴笋对Cd的吸收，Cd抑制了莴笋对Zn的吸收；在Zn为高浓度时，Zn抑制了莴笋对Cd的吸收，Cd促进了莴笋对Zn的吸收。酸雨对莴笋的生长起抑制作用，莴笋生物量随着酸雨pH值的升高而增加 ...
彭莉 +4 more
doaj +2 more sources
Simultaneous Determination Method for Pesticide Multi-residues in Surface Water and Its Application to Combined Pesticide Pollution Survey in Jiulong River [PDF]
, 2013 化学农药在防治农业病、虫、草害防治中起着不可取代的重要作用，随着高毒高残留的有机磷、有机氯等传统农药陆续被禁用、停产，大量低毒、低残留的“新型”农药不断推向市场，得到大量生产和使用。长期大量生产、使用的农药有相当一部分会通过生产废水排放、干湿沉降、地表径流等方式进入水体，威胁水生生态系统和饮用水源安全。 本研究选择包含有机氯、有机磷农药在内的、氨基甲酸酯类、拟除虫菊酯类、苯胺及酰胺类、唑类、烟碱类、杂环类等共计286种农药为目标物，建立其在表层水中的同时分析方法 ...
林姗姗
core