Results 61 to 70 of about 34,298 (141)
Gongye shui chuli, 2013 利用超声波改性硅酸钙并用其处理焦化废水生化出水,对比了改性前后硅酸钙吸附性能的变化,研究了改性硅酸钙投加量、吸附时间、pH对吸附效果的影响。结果表明,在相同条件下,改性硅酸钙对COD、NH3-N的去除率优于硅酸钙。改性硅酸钙的最佳吸附条件:改性硅酸钙投加质量浓度20.0 g/L、振荡时间45 min、pH=6,此时COD的去除率为41.16%,NH3-N的去除率为66.16%。
韩剑宏 +6 more
doaj
World Food Policy, Volume 12, Issue 2, November 2026.ABSTRACT This critical ethnographic study examined the perspectives of service providers and organizational leaders working within charitable food services for people experiencing homelessness in two Canadian cities. Informed by Paulo Freire's writings and a human rights‐based approach, we explored how power is enacted through everyday practices and ...
Corinna Easton +4 more
wiley +1 more source
Gongye shui chuli, 2020 针对湿法冶金高盐废水有机物去除难的问题，通过浸渍法对活性炭进行改性，研究了改性活性炭对湿法冶金高盐废水中有机物的去除效果，并探讨了改性活性炭的吸附机理。结果表明，在温度为25℃，改性活性炭投加量为50 g/L，不调节pH，吸附时间为36 h的条件下，COD去除率为65%，较改性前提高了25%。吸附过程符合准二级动力学方程，吸附等温线服从Langmuir方程，饱和吸附量为40.49 mg/g。
王倩雯 +4 more
doaj +2 more sources
World Water Policy, Volume 12, Issue 4, November 2026.ABSTRACT Biochemical oxygen demand (BOD) remains a core indicator of organic pollution in freshwater monitoring, but its role in water policy and practice is changing as water‐quality assessment moves toward predictive, integrative, and decision‐support approaches.
Isadora Favero Roque Cenci +5 more
wiley +1 more source
World Water Policy, Volume 12, Issue 4, November 2026.ABSTRACT This paper describes and analyzes recharge practices in Bács‐Kiskun County, Hungary, within what can be categorized as the farmer domain. Such locally embedded aquifer recharge practices remain underexplored in Hungary. Current research and funding largely focus on large‐scale Managed Aquifer Recharge (MAR) interventions emphasizing intended ...
Helen Sundberg, Michael Gilek
wiley +1 more source
Gongye shui chuli, 2018 利用不同浓度NaOH水热处理GO，将其表面疏水性的环氧基团转化为亲水性的—OH和—ONa基团，得到表面亲水性的GONaOH。GONaOH呈多孔结构，改性有效地改善了GO材料的比表面积。进一步系统研究了各因素对表面改性GONaOH吸附性能的影响。研究结果表明，以20 mg 2 mol/L NaOH改性处理的GONaOH为吸附剂，pH=5条件下对200 mL 50 mg/L铬离子吸附性能达到305.3 mg/g，约为未经改性处理的GO的3倍。
曹宝月 +5 more
doaj +2 more sources
World Water Policy, Volume 12, Issue 4, November 2026.ABSTRACT This article examines how renewable‐energy expansion is changing water–energy bargaining among Iran, Iraq, and Türkiye in the Tigris–Euphrates basin. Much of the existing literature on transboundary water politics focuses on territorial control, upstream–downstream power asymmetries, legal rules, and hydro‐hegemony but gives less attention to ...
Umud Shokri
wiley +1 more source
There Is Always a Bigger Fish. Determinants of Power Perceptions in Swiss Biodiversity Policy
Policy Studies Journal, Volume 54, Issue 4, November 2026.ABSTRACT The Advocacy Coalition Framework (ACF) views power as crucial in policy processes, but the nature of coalition power, its determinants, and how to empirically measure it remain understudied. In this article, we use a mixed method approach and social network analysis to explore power relationships in the biodiversity policy subsystem in ...
Alix d'Agostino +2 more
wiley +1 more source
Gongye shui chuli, 2016 采用不同浓度的高锰酸钾溶液对甘蔗渣进行改性，并用扫描电镜（SEM）、傅里叶红外光谱仪（FTIR）和X射线衍射（XRD）对改性前后甘蔗渣的物化性能进行表征。研究了改性甘蔗渣对Pb2+的吸附动力学和吸附等温线，并对吸附机理进行初步探讨。结果表明：改性甘蔗渣吸附Pb2+的过程符标准二级动力学模型，改性甘蔗渣对Pb2+的吸附等温线符合Langmuir方程；KMnO4（0.5 mmol/L）改性甘蔗渣的吸附机理为化学配位反应；KMnO4（30 mmol/L）改性甘蔗渣吸附Pb2+的过程形成了内层表面络合物。
李芬芳, 陈庆, 戴友芝
doaj +2 more sources
Gongye shui chuli, 2015 用KOH对市售的粉末活性炭进行表面改性。采用BET分析改性前后活性炭的表面结构,并采用活性炭涂层电极构建电容去离子吸附装置,研究改性后电极的去离子效果。研究表明:经过KOH改性后,活性炭的比表面积从519.25 m2/g增加到975.07 m2/g,提高了87.78%,中孔孔容占总孔孔容的百分比提高了48.28%,改性后活性炭的孔隙结构和孔径的分布更有利于溶液中的Na+和Cl-通过,提高了电极的吸附速率。
蒋绍阶 +4 more
doaj +2 more sources