铁氧化物复合氧化铝催化臭氧化过程中溴酸盐的生成控制简

以市售活性炭、硅藻土和氧化铝小球为载体,考察了负载铁基活性组分对催化臭氧化过程中溴酸盐的控制情况,其中,铁基复合氧化铝小球体现出更好的溴酸盐还原特性和催化剂稳定性,证实催化剂中铁氧化物是溴酸盐得到有效控制的主要活性组分。进一步考察了铁基复合氧化铝小球催化臭氧化处理实际原水过程中对溴酸盐的生成控制,以及反应过程中溶解性有机碳（DOC）的去除情况。结果表明,与单独臭氧化相比,该催化剂既能有效去除水中的溶解性有机物,又能明显抑制溴酸盐的生成,反应50 h,其活性并没有明显下降。催化剂失活主要归因于吸附位点数量的下降,可以通过负载铁氧化物来实现催化剂的再生。     

基于复杂网络演化博弈的企业集群低碳技术创新扩散研究

为了探究低碳经济情境下潜在技术创新采纳企业的微观决策互动机制涌现的企业集群宏观扩散现象,利用复杂网络演化博弈方法,将无标度网络视为扩散载体,通过建立市场机制和政府规制下潜在采纳企业的低碳技术创新采纳决策及扩散模型,运用Matlab软件仿真研究微观层面因素对宏观扩散的影响。研究表明:市场机制下只有当企业采纳低碳技术创新增加的收益大于投入时,网络才能演化至扩散深度为100%的稳定状态,实现企业集群内低碳技术创新的完全扩散;网络规模对扩散速度有显著影响,规模越大扩散速度越慢;实施碳税、投入补贴和惩罚措施三种规制手段均能有效提高低碳技术创新扩散深度;网络规模越大碳税的推动作用越显著,相反,规模越小的网络对补贴力度的敏感性越强,而不同规模的网络对罚款力度的敏感性无明显差异。研究对推进企业集群低碳技术创新扩散及政府部门的环境规制有一定的启示作用:第一,企业间的策略学习对企业集群低碳技术创新扩散有重要影响,在企业集群中应培养核心企业的低碳技术创新观念,使其作为"意见领袖"影响其它企业的低碳技术创新采纳策略;第二,政府作为低碳技术创新扩散的推动者及环境监管的权利部门应为采纳低碳技术创新的企业提供补贴、依据碳排放量收缴碳税及惩罚不实施低碳生产企业等规制措施;第三,政府部门应根据发展阶段把握规制方式和力度,初期以补贴措施为主,随着低碳技术创新扩散深度逐渐增大降低补贴力度,同时提高碳税税率,另惩罚措施应在推进低碳技术创新扩散全过程中广泛实施。     

Establishing a measurement,reporting, and verification system for climate finance in post-Paris agreement period

The measurement, reporting, and verification (MRV) of climate finance was originated from discussions under the United Nations Framework Convention on Climate Change (UNFCCC). It has been one of the key issues of global climate negotiations since 2009 and will continue to be of significant importance in addressing climate change and strengthening international trust. This paper analyses the concept, the objective, and the progress of the MRV of climate finance based on reviews of the latest literature and think-tank reports regarding climate finance regime and MRV. Following the analysis, challenges faced with the MRV of climate finance are illustrated. This paper presents that the comparability of climate finance data needs to be improved due to the variety of methodologies used for disaggregating climate finance. In addition, the integrality of the MRV system of climate finance has been impaired by the lack of feedback mechanism from the recipients to the contributors in reporting system. Furthermore, although accounting system of climate finance has been developing and improving, it remains incapacity in providing accurate data on disbursed climate finance. Responding to the above challenges, this paper proposes the key tasks in establishing a comprehensive MRV system for climate finance at international level. The tasks involve developing a measurement system with consistent data basis and accounting basis, a reporting system with more detailed guidance and standardized formats, as well as a verification mechanism balancing top-down and bottom-up review processes. In the last section, this paper concludes that the establishment of an improved MRV of climate finance requires concerted cooperation and negotiations between developed and developing country Parties under the UNFCCC. As one of the few developing country donors to the Global Environmental Facility (GEF), China is suggested to clarify its propositions as a developing country in aspects such as concept, coverage, and architecture of climate finance and MRV system, and gain bargaining power in improving operating and technical rules of international climate finance regime.     

A framework for reforming India's forest biodiversity management regime

India's forest biodiversity management regime is analysed at the policy, legal and institutional levels, from the perspective of the triple objectives of the Convention on Biological Diversity and the principles of the Indian constitution. The forest biodiversity management regime has both structural and functional flaws that render it largely incapable of facing the challenge of increasing biodiversity degradation and deepening poverty among the Adivasis and other forest‐dependent communities. The paper argues for the reform of the forest biodiversity management regime and offers recommendations in regard to most aspects of the regime, with a view of putting the country's conservation enterprise on a course that is effective, sustainable and inclusive, rejecting the report of the High Power Committee (HPC) (also known as the Subramanian Committee), which is premised on easing corporate access to forests.     

美国EPCRA法案对我国推动企业环境信息公开的启示

本文围绕美国企业环境信息公开专项法案——EPCRA法案和在该法案要求下建立的、为世界各国所广泛采用的企业环境信息公开核心制度——有毒污染物释放清单制度(TRI),分析总结了发达国家促进企业环境信息公开的立法理念、制度体系、工作机制、技术支持、信息平台等方面的经验,并将其与我国企业环境信息公开专项制度《企业事业单位环境信息公开办法》进行了对比分析,识别了我国企业环境信息公开工作相关基础研究、制度设计、制度执行等方面的不足,且结合我国下一阶段推动环境质量全面改善的工作需求、推动排污许可改革等工作任务,就完善我国企业环境信息公开工作提出了建议。     

经济增长和环境规制对雾霾的区际影响差异

为探究不同省级区域雾霾、经济增长和环境规制之间的空间关联效应,本文提出针对雾霾的引力模型空间权重矩阵,并利用该矩阵建立了空间杜宾模型,分别对全国、西部、中部和东部省区的面板数据进行了空间计量检验。实证结果显示:全国雾霾的莫兰指数值显著,且取值介于0.367—0.460之间;雾霾"重心"呈现先向东南再向西北移动的趋势,移动距离为76 557 m;雾霾的莫兰指数值为东部省区最大,西部省区最小,中部省区介于二者之间。全国的雾霾与经济增长之间呈显著的"U"型曲线,而西部、中部和东部省区则呈倒"U"型曲线,其中中部省区的曲线最为陡峭,西部省区次之,东部省区最为平缓。环境规制每增加1%,只有西部和东部的雾霾相应减少,且各自相应下降0.009和0.010个百分点。西部和东部经济增长的溢出效应均显著,而环境规制的溢出效应不显著。研究结果表明:(1)雾霾在空间上表现出集聚的特点,全国和三个区域的雾霾都存在显著的正向空间溢出效应,这种空间依赖性在时间维度上大致呈加强的趋势;雾霾的空间相关性表现为东部省区最强,西部省区紧随其后,中部省区最低。(2)西部和东部省区部分省市还未过拐点,全国意义上的环境库茨涅兹假说是不存在的,或者是至少还未出现。(3)西部和东部环境规制效果较为理想,而中部省区的环境规制效果不佳;从全国总体来看,当前的环境规制整体上对雾霾并未起到有效的抑制作用。(4)东西部省区和中部省区经济增长对雾霾溢出效应分别表现为正向和反向;环境规制对雾霾的溢出效应并不显著。建议加强对雾霾的区域协同治理,重点推进西部和东部省区经济结构的转型升级,调整和完善西部、中部和东部省区的环境规制政策。     

绿色消费的社会治理体系研究

绿色消费,伴随可持续发展战略的产生而逐步体现在居民日常生活中。消费什么主要由消费者自行决定,政府难以强求;是否消费绿色产品,受到收入、受教育程度、追求品质的动机等要素影响,购买消费品时还受认知过程、情绪过程、意志过程制约。绿色消费不仅要满足人体健康和社会需求,还要体现资源节约和环境保护基本国策要求,以实现消费品生产、流通、消费以及包装物回收利用全生命周期的环境影响最小化。政府可以通过政策激励、宣传教育、率先垂范等途径引导公众更多的消费绿色产品。     

Prioritizing debt conversion opportunities for marine conservation

Incentivized debt conversion is a financing mechanism that can assist countries with a heavy debt burden to bolster their long-term domestic investment in nature conservation. The Nature Conservancy, an international conservation-based nongovernmental organization, is adapting debt conversions to support marine conservation efforts by small island developing states and coastal countries. Prioritizing debt conversion opportunities according to their potential return on investment can increase the impact and effectiveness of this finance mechanism. We developed guidance on how to do so with a decision-support approach that relies on a novel threat-based adaptation of cost-effectiveness analysis. We constructed scenarios by varying parameters of the approach, including enabling conditions, expected benefits, and threat classifications. Incorporating both abatable and unabatable threats affected priorities across planning scenarios. Similarly, differences in scenario construction resulted in unique solution sets for top priorities. We show how environmental organizations, private entities, and investment banks can adopt structured prioritization frameworks for making decisions about conservation finance investments, such as debt conversions. Our guidance can accommodate a suite of social, ecological, and economic considerations, making the approach broadly applicable to other conservation finance mechanisms or investment strategies that seek to establish a transparent process for return-on-investment decision-making.     

The effects of ammonium sulphate and urea upon egg hatching and miracidial survival of Schistosoma mansoni

Abstract

The effects of various concentrations of ammonium sulphate and urea on egg hatching and miracidial survival of S. mansoni were tested in order to determine if the use of these fertilizers in the ricelands of the Republic of Cameroon could affect the transmission of schistosomiasis. Results indicate that hatching of eggs and survival of miracidia varied with concentrations of tested chemicals and times of exposure. Exposure of S. mansoni eggs to 0.20%‐1.00% ammonium sulphate or to 0.50%‐4.00% urea reduced their ability to hatch and produce miracidia. A chemical concentration of 1.00% ammonium sulphate or 4.00% urea was found to be sufficient to produce complete inhibition of hatching. High concentrations of both chemicals not only inhibited miracidial emmergence but also may be ovocidal. Results obtained from miracidial survival tests indicated that LC₅, LC₅₀ and LC₉₅ values for ammonium sulphate were 0.07%, 0.80% and 10.61% after 2 hours of exposure; 0.03%, 0.16% and 0.90% after 4 hours of exposure; and 0.30%, 0.20% and 0.40% after 6 hours of exposure respectively. Similar statistical analyses revealed that the LC₅, LC₅₀ and LC₉₅ values for urea were 0.22%, 1.90% and 16.25% after 2 hours of exposure; 0.28%, 0.57% and 1.14% after 4 hours of exposure; and 0.13%, 0.27% and 0.57%” after 6 hours of exposure respectively. Although the two fertilizers exerted some adverse effects on S. mansoni eggs and miracidia at relatively high concentrations, neither of them was found to be of practical value. Ammonium sulphate and urea concentrations effective in killing S. mansoni eggs and miracidia were about one to two orders of magnitude greater than the actual field application rates.     

阴极负载不同催化剂对天然水体中沉积物微生物燃料电池运行特性的影响

考察了阴极负载Co₃O₄和MnOOH对天然水体中沉积物微生物燃料电池（SMFC）产电性能和SMFC对沉积物中有机质去除率的影响。实验结果表明,SMFC阴极负载Co₃O₄和MnOOH后,体系的输出电压由483 mV增大到549 mV和534 mV;相应体系的内阻由206 Ω显著降低到99 Ω和128 Ω,最大功率密度（Pmax）由3.3 mW/m²增大到9.1 mW/m²和6.6 mW/m²。此外,SMFC体系的电流密度与沉积物中烧失量（LOI）、易氧化有机质（ROOM）去除率呈线性关系,并且阴极负载Co₃O₄和MnOOH可以促进阳极沉积物中有机质的去除。