自来水及其净水器

介绍净水器的功用、选型以及如何作出最节省费用的选择。     

活性炭纤维空气净化窗

随着人们生活水平的提高,室内污染问题越发严峻,而活性炭纤维是一种优良的吸附材料,针对目前室内空气污染的严峻形势和室内空气污染的净化技术,创新性地将活性炭纤维与空气净化窗相结合,在保证通透性能的同时又处理了空气污染。本文充分分析活性炭纤维作为吸附剂的性能和用途特点,重点分析其可作为室内空气污染处理有效方法的可行性。     

4层净化 家用水龙头净水器 188元送到家

正去余氯、异味、铁锈、杂质……为什么有自来水,还要净水器？很多人都有疑问,家里用的是正规自来水厂的水,也是经过漂白、杀菌等处理的,为什么还要用净水器?中国大部分城市,许多年前就已经建好了输配水设备。现在,自来水管道陈旧、老化会带来自来水的二次污染,因此很多自来水并没那么安全,所以要用净水器。为什么要选家用水龙头净水器?净化效果好:家用水龙头净水器,采用四层净化原理:第一、二层有效滤掉泥沙、铁锈等杂质,吸附水中异色、异味;第三、四层高效除余氯、三氯甲烷等,全面过滤细微杂质。     

粉末活性炭-超滤膜工艺去除自来水中有机物的模型

该文介绍了以均质表面扩散模型和修正的Freundlich吸附等温线为基础建立的粉末活性炭-超滤膜（PAC—UF）系统对水中有机污染物的去除模型；分析了该模型能够有效预测PAC—UF系统对水中污染物去除的活性炭投量和使用周期，也为该系统反应器的设计提供了参考。     

石墨烯的吸附性能在环境保护中的应用

石墨烯作为一种新型的碳纳米材料,因其巨大的比表面积、强烈的表面化学活性,故而具有良好的吸附性能,也被广泛地应用于环境保护领域。通过介绍石墨烯的概念,研究其对重金属、染料、大气污染物的吸附性能,分析其在实际应用中的优缺点,进而总结石墨烯的吸附性能在环保方面的应用,并提出展望。     

改性湿熄焦焦粉联合臭氧法处理污水的研究

本文的主题是探索用活化后的湿熄焦焦粉联合臭氧对生活污水进行处理,主要研究熄焦粉对生活污水的处理效果、熄焦粉活性炭的制备、熄焦粉活性炭对污水的处理效果以及用熄焦粉活性炭联合臭氧处理生活污水的方法。     

家用净水器去除有机物效果和工艺特点

对两种形式(中空纤维膜型及反渗透型)的三款家用净水器进行了净水效果的比较试验。前者去除有机物的能力有限,而后者出水水质良好,可满足生饮要求。     

生活方式与城市新移民的健康水平

中国逐步建立了城乡统一的劳动力市场,城市新移民已成为城市劳动力市场的主要构成,研究其健康水平具有重要的意义。对中国七个大城市新移民调查发现,蓝、白领职工自评健康与体态健康在行为、状态、认知三个维度上产生影响,生活方式对蓝、白领职工自评健康的影响方式不同,而对蓝、白领职工体态健康的影响方式则具有更多的共性,从而导致了蓝、白领职工在自评健康与体态健康两项指标上存在反差。     

止泻药怕牛奶

正腹泻时,很多人会用药物缓解,但如果用药不当,可能影响治疗效果。引起腹泻的原因较多,应有针对性地用药。轻度腹泻时,可口服补液盐缓解脱水症状;感染性腹泻常伴有发热,应在医生指导下服抗生素或吸附剂、收敛剂(如活性炭、鞣酸蛋白);肠道菌群失调引起的腹泻,可补充正常菌群或微生态制剂;由天气(寒冷)和各种刺激所致的激惹性腹     

煤气循环冷却水pH值的控制

该文对发生炉煤气净化、冷却过程中,与煤气直接接触的循环水pH值偏低问题进行探讨。并提出通过碱液添加装置的应用以达到均匀滴加碱液,可以有效地控制循环水的pH值。     

高锰酸钾预氧化与微滤膜联用去除微污染物的研究

膜技术是水处理技术之一,其中MF膜可截留水中绝大部分悬浮物、胶体和细菌,是可靠的除浊和消毒工艺,但对水中有机物的去除率却不高,需作适当的预处理。预氧化技术能有效去除水中的有机污染物,提高出水水质。采用高锰酸钾预氧化与微滤膜联用处理微污染原水试验结果表明:出水浊度小于0．1NTU,Fe的去除率达到97％以上,对浊度、CODMn、Fe、Mn等均有较好的去除效果。     

预臭氧化与臭氧生物活性炭同步去除饮用水锰含量的研究

该文通过以流量为1m3/h,工艺流程为预氧化(预臭氧和预氯化)→常规处理→后臭氧生物活性炭→出水消毒的中试试验,阐明预臭氧化和臭氧活性炭工艺在保障各自效果的同时,取得了对锰有较好的去除作用,在1.5mg/L的臭氧投加量下,臭氧生物活性炭的深度处理工艺可以将锰含量降至0.02mg/L。     

Interaction dynamics: The case of the water sector skills plan in South Africa

Despite extensive and continuous efforts to strengthen the capacity of people, organizations and institutions, there is evidence of an increasing gap between the existing and required capacities within the water sector. Consensus seems to be emerging regarding the need for national strategies to improve water sector capacity development. This paper analyses the dynamics of actors’ interactions and their characteristics (motivation, cognition and power) during the formulation and implementation of a specific capacity development strategy, namely the Water Sector Skills Plan (SSP) in South Africa. Based on the Contextual Interactive Theory and empirical findings, our analysis indicates slow progression and challenges with implementing the SSP, mainly due to the lack of consultation with key stakeholders during the formulation stage, a lack of data sharing among the target group (the Sector Education Training Authorities), and a lack of capacities within the key implementing organizations. These policy dynamics need to be taken into account when advocating for national capacity development strategies as a solution for challenges with water sector capacity development. The paper proposes the recommendations that are of relevance for the SSP as well as similar initiatives in other countries.     

生物活性炭柱(池)净水效果的影响因素

影响生物活性炭柱净水效果的主要因素有:滤速(停留时间)、炭层高度、水温和溶解氧等。     

Agency in the twenty-first century: the emperor’s new clothes

Ideas about people with disabilities have evolved dramatically since the 1950s – from individuals ‘suffering from illness’ and dependent on others, to today’s credo stressing participation and social inclusion. People with a disability are considered to have capacities and bear responsibility to achieve active citizenship, which is positive in that a person’s capacities are addressed rather than their limitations. The focus on capacities stems from the Independent Living Movement that originated in the 1960s in the USA, advocating self-determination, self-respect and equal opportunities for people with disabilities. They demanded equal access to both the public domain and they requested assistance to enable their participation. As such, their early effort was to strive for agency. This article will explore changing and competing constructions of agency, participation and citizenship.     

Navigating Globalization: Immigration Policy in Canada and Australia, 1945–20071

Scholarship on immigration and globalization has failed to adequately analyze the nation‐state’s regulatory capacities, insisting instead that contemporary patterns of migration jeopardize national sovereignty and territoriality. While recognized that states possess the legitimate authority to control their territorial and membership boundaries, recent transformations of these capacities remain largely unanalyzed. This article’s historical analysis of Australia and Canada’s postwar immigration policies demonstrates that the contours of state regulation are intimately connected to the exigencies of state administration and nation building and—in contrast to the expectations of dominant theories—have intensified and expanded within the globalization context. The literature’s inattention to the fundamentally political nature of immigration has obscured the critical effects of national policies within both the migratory and globalization process. Australia’s and Canada’s contemporary policies constitute a unique model of migration control and reflect attempts by both countries to strategically position their societies within the global system and resolve a number of economic, political, cultural, and demographic transitions associated with globalization.     

The Relationship Between Caseworker Assessments of Clients’ Social Networks and Child Welfare Placement Outcomes

Policy changes in Ontario, Canada, emphasized the role of social supports as a protective measure for children at risk. The authors examined the relationship between worker assessments of total number and type of social support and whether an infant is removed from the mother’s care. Analyses indicated that infants were less likely to be removed from the mother’s care when caseworkers viewed maternal social supports as positive. This association was strongest when the caseworker identified only positive supports, with nonnegative contacts. Results suggest that caseworkers’ distinctions between positive and nonpositive social networks influence removal decisions.     

Comprehensive carrying capacity of the urban agglomeration in the Yangtze River Delta,China

Urban agglomeration (UA) is a complex artificial system. Carrying capacity reflects the environmental capability to support human activity. From the perspective of resource supply and demand, the paper selects 12 representative indicators to evaluate the carrying capacity of land, water, transportation and environment. 16 cities of the UA in the Yangtze River Delta, China, are selected as data samples. Time-series global factor analysis is employed to extract the principal factors of the index of 2000 and 2008. The results show that the comprehensive carrying capacity of the UA tends to benign development as a whole except for Shanghai. Carrying capacities of land and water have become the two critical factors to restrict economic and social development. Based on the hierarchical cluster analysis, the values differentiate the UA into significant gradients. The coefficient of variation shows that the spatial differentiation is conspicuous and expanding. The paper also proposes some policies for the government and planners to successfully design and implement the UA.     

The Road Through Paris: Climate Change,Carbon, and the Political Dynamics of Convergence

Abstract

This article tracks the key events that set the stage for the 21st Conference of the Parties to the UN Framework Convention on Climate Change (COP21) in Paris, particularly as they relate to politics of convergence. One side of this coming together is an intersection of issues, where new terrestrial and aquatic carbon sequestration programs have blurred the margins of climate change mitigation and resource grabbing. These programs, enclosing forests, farmlands, and oceans, are likewise fused together in what can be described as an emerging ‘carbon complex’ that is part of the wider blue/green economy. On the reverse side, the clear intersection of issues as witnessed by radical, and historically sectoral, agrarian/social justice movements is causing them to intertwine in resistance. The realm of climate change has proven to be an exceptional space of struggle and countermovement building. Political interactions between movements have become increasingly sophisticated—requiring frameworks that address environmental, agrarian, and oceanic issues at once, as the issues have become ever more complex. Agrarian/social justice movements maintain that their agendas for food sovereignty and climate justice hinge upon exposing fault lines in the system and advocate overall system change. COP21 and its parallel side events were together a landmark moment, but part of a much more involved process, ‘the road through Paris’, along which movements had carved out transnational and local spaces of convergence against the backdrop of a global carbon complex.