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21.
城市污水污泥发酵制园林营养土中微生物的变化分析 总被引:1,自引:0,他引:1
通过桶装发酵装置,进行城市污水污泥发酵制园林营养土过程中微生物的变化研究,测试不同好氧-厌氧交替组的发酵温度以及细菌、真菌、放线菌数量等的变化,探讨发酵温度与微生物变化的规律.结果表明,夏季不同发酵方式的发酵温度在50℃以上的持续时间均长于冬季,且夏季好氧-厌氧交替发酵的发酵温度在55℃以上的持续时间长于好氧发酵;冬季与夏季的好氧、好氧-厌氧交替发酵后,堆料中的粪大肠菌群数量均达到了《城镇污水处理厂污泥处置园林绿化用泥质》(CJ 248-2007)的卫生学指标要求;夏季好氧-厌氧交替发酵过程中,厌氧后发酵温度有所下降,好氧后发酵温度又有所回升;无论好氧还是好氧~厌氧交替发酵中,细菌均为优势种群,真菌、放线菌数量比细菌数量低2~6个数量级. 相似文献
22.
海岛是海洋生态系统的重要组成部分,保护海岛生态环境是推进海洋生态文明建设、保护海洋生态环境的重要方面。海岛居民是保护海岛生态环境的主体之一,研究海岛居民环境友好行为的影响因素,引导和鼓励海岛居民主动采取环境友好行为是改善海岛生态环境的有效途径。本研究在梳理国内外相关文献的基础上,对海岛居民环境友好行为的概念、类型及影响因素进行理论分析,建立包含生态管理行为、消费行为、说服行为、公民行为四个环境友好行为变量,环境态度、环境保护知识、环境经历、社会政策、行为约束五个影响因素变量在内的理论模型。结合海岛生态环境和海岛居民的特点,设计海岛居民版环境友好行为测量量表,并在长岛县进行问卷调查,运用描述性统计分析、结构方程模型分析探究海岛居民环境友好行为的影响因素及影响因素间的内在关系。研究发现:①海岛居民环境友好行为总体水平差异较大,难度较低的环境友好行为实施较好,而难度较高的实施较差;影响因素变量中,环境态度积极,环境经历丰富,环境保护知识掌握较好,相关社会政策较为不利,行为约束偏中性。②环境态度、环境经历、社会政策对海岛居民环境友好行为具有显著正向影响。③环境保护知识对环境态度具有显著正向影响,但对海岛居民环境友好行为无显著影响,存在“知易行难”现象。行为约束对海岛居民环境友好行为无显著影响。④环境经历不仅直接影响海岛居民环境友好行为,而且通过环境态度对海岛居民环境友好行为施加间接影响。基于研究结论,提出了改善海岛居民环境友好行为的对策建议。 相似文献
23.
伴随着工业化进程加快,社会责任缺失现象日益严重,各类企业违法违规事故层出不穷,其中不乏国有大型控股公司,这种现象引起了投资者、监管机构等利益相关者的广泛关注。在此背景下,研究资本市场对上市公司社会责任缺陷披露的反应具有重要的理论意义和现实意义。本文以交叉上市的紫金矿业为例,采用事项研究法,检验了A股和H股市场对紫金矿业集团股份有限公司发布的一系列有关紫金山铜矿湿法厂污水池突发渗漏环保事故重要公告的市场反应,并比较了两地市场对同一公告的反应差异。研究发现:两地市场对重大事故公告均提前预知并呈负面反应,在公告前A股市场反应程度大于H股市场,公告发布后H股市场投资者更加敏感;两地市场对董事会(临时)决议公告呈正面反应,但H股市场投资者更加谨慎;对处罚公告两市反应不同,A股市场未对处罚公告作出反应,H股市场对处罚公告呈负面反应;总体而言,H股市场与A股市场反应程度存在显著差异。 相似文献
24.
为有效应对大客流情景下人群拥挤对地铁站正常运行带来的影响,采用社会力模型和Anylogic仿真软件,对地铁站大客流疏散能力进行建模和分析,从客观、主观、管理视角分析影响客流疏散能力的因素,基于改进社会力模型刻画行人行为,分析影响地铁车站疏散能力的3个关键因素,并以南宁地铁1号线朝阳广场站为背景进行研究。研究结果表明:行人密度是影响地铁站疏散能力的关键因素,出入口选择策略和行人亲属关系比例对疏散能力影响显著,研究结果可为地铁客流疏散提出针对性建议。 相似文献
25.
《Corporate Social Responsibility and Environmental Management》2017,24(6):676-691
This paper investigates the economic benefit of corporate pollution reduction expenditures and the value relevance of the Global Reporting Initiative (GRI) report. It utilizes a unique dataset of pollution reduction expenditures disclosed by Taiwanese manufacturing companies in their GRI reports. Economic profit is measured with Economic Value Added and Tobin's Q. The value relevance is measured with three benchmarks: stock returns, cash flows, and stock prices. The Generalized Method of Moments is adopted to control for potential endogeneity. This paper finds a positive relation between pollution reduction expenditure and corporate economic benefits, which suggests that managerial decisions aimed at pollution reduction are consistent with the interests of shareholders and of stakeholders. In addition, this paper finds that the G3.1 guideline provides relevant information in regard to firm value, while it plays merely a partial role in investors' investment decisions. Copyright © 2017 John Wiley & Sons, Ltd and ERP Environment 相似文献
26.
Won‐Moo Hur Hanna Kim Joon Hyo Jang 《Corporate Social Responsibility and Environmental Management》2016,23(6):345-357
The purpose of this study was to investigate gender differences in corporate social responsibility (CSR) perceptions regarding business sustainability. Another important objective of this study was to explore the moderating role of gender on the relationship between CSR perception and three corporate marketing outcomes (i.e., corporate brand equity, corporate distrust, and corporate hypocrisy). Using a sample of 867 consumers in South Korea, a t‐test and hierarchical moderated regression analysis were employed to test four hypotheses. The results of this study showed that female consumers have a higher perception toward CSR than male consumers. The results also revealed that the positive relationship between CSR perception and corporate brand equity was stronger among men than women. In addition, the negative relationships between CSR perception and corporate distrust and between CSR perception and corporate hypocrisy were both stronger among men than women. Copyright © 2015 John Wiley & Sons, Ltd and ERP Environment 相似文献
27.
28.
The use of intrinsic diversity profiles is recommended for ranking biological populations according to their diversity. The profiles are estimated on the basis of independent replications of a suitable sampling design. Asymptotically conservative joint confidence bands are constructed by the Richmond method, while equivalence hypotheses of couples of profiles are assessed against dominance or crossing alternatives by a multiple comparison test. The proposed procedures are applied for obtaining a partial diversity ordering for the avian populations settled in some selected parks in the north of Italy. Copyright © 1999 John Wiley & Sons, Ltd. 相似文献
29.
Ananda Khanal Muhammad Akhtaruzzaman Indrapriya Kularatne 《Corporate Social Responsibility and Environmental Management》2021,28(6):1921-1929
In recent decades, the concepts of corporate social responsibility (CSR) and social media have gained immense importance among businesses and their stakeholders. These concepts have gained popularity and acceptance among both large and small businesses of most industries. However, the existing CSR literature showed that most studies concentrated on large businesses, leaving the domain of small businesses under-explored. The literature review revealed that only a few researchers had investigated the influence of social media on stakeholder engagement and the CSR of small businesses. This research aimed to explore the impacts of social media on the CSR of small businesses and used a concurrent mixed-method research design, employing survey questionnaires from 82 participants and semi-structured interviews with eight participants. The study conducted among the owners and managers of small businesses in a local government district in New Zealand discovered that many of them considered social media beneficial to engage with stakeholders and understand CSR trends. It also found that social media encouraged businesses to understand their vision, values and implement policies that are environmentally friendly and beneficial to the employees. 相似文献
30.
Michael William Mullen Bruce E. Allison 《Journal of the American Water Resources Association》1999,35(3):655-662
ABSTRACT: Forces driving the initiation of watershed management activities in Alabama have ranged from top-down, agency-led initiatives to bottom-up, citizen-led initiatives. A number of watershed projects in Alabama were examined including three NPS projects funded by U.S. EPA grants and a more comprehensive locally-initiated watershed management authority. Watershed projects were categorized into four different models. Factors which produced significant differences in the development and utilization of social capital and local capacities for watershed management were investigated. The success of watershed management initiatives was examined qualitatively and appears to correlate with a number of social factors. These factors include the extent of stakeholder involvement, the availability of social capital in the watershed, and the presence of a real or perceived water resource concern or problem. Both short term project success and the longer term prognosis for continued watershed management activities seems to depend most upon the amount of social capital in the watershed. Two major changes in resource management programs and organizations could lead to increased focus on and support for local watershed management initiatives. These are reorganization of resource management agencies around watershed units, and assignment of at least one staff person in each watershed unit to watershed management. 相似文献