Characterization of a novel marine aerobic denitrifier Vibrio spp. AD2 for efficient nitrate reduction without nitrite accumulation

Environmental Science and Pollution Research - Aerobic denitrifiers have the potential to reduce nitrate in polluted water under aerobic conditions. A salt-tolerant aerobic denitrifier was newly...     

Characteristics and chemical speciation of waste copper slag

Environmental Science and Pollution Research - Waste copper slag contains abundant valuable metal element Fe, and residual elements such as Cu, As, Pb, Zn, and Mo. Simply stockpiling or landfilling...     

Analysis of China’s carbon emission driving factors based on the perspective of eight major economic regions

Environmental Science and Pollution Research - Low-carbon transition has gradually become the focus of research on environmental issues. This paper takes China’s eight major economic regions...     

Explanation of heavy metal pollution in coal mines of china from the perspective of coal gangue geochemical characteristics

Environmental Science and Pollution Research - In the process of coal gangue surface accumulation and underground filling disposal, the heavy metals contained in coal gangue will inevitably...     

重庆市夏秋季VOCs对臭氧和二次有机气溶胶生成潜势的估算

为估算重庆市夏秋季VOCs（挥发性有机物）对O₃和SOA（二次有机气溶胶）的生成潜势,利用在线GC-MS/FID在2015年8月22日-9月23日对重庆市区点和郊区点VOCs开展了为期一个月的实时观测,获得市区点和郊区点$ \varphi $（TVOCs）（总挥发性有机物）分别为41.35×10-9和22.72×10-9,其中市区点以烷烃（35.2%）和烯炔烃（25.2%）为主,郊区点以含氧挥发性有机物（oxygenated volatile organic compounds,OVOCs）（30.6%）和烷烃（26.0%）为主.结合最大增量反应活性量化市区点和郊区点VOCs的OFPs（臭氧生成潜势）分别为149.11×10-9和71.09×10-9,市区点OFPs最大的是乙烯、丙烯、甲苯、C8和C9的芳香烃等,郊区点OFPs最大的VOCs是丙烯醛、异戊二烯和甲基乙烯基酮.结合气溶胶生成系数量化郊区点和市区点VOCs对SOA的生成贡献分别为0.36和1.26 μg/m3,相比国内其余城市VOCs的SOAP（二次有机气溶胶生成潜势）较小,主要以甲基环己烷、正壬烷、正葵烷和十一烷等高碳烷烃,以及甲苯、苯、二甲苯和乙苯等芳香烃的SOAP为主.研究显示,控制烯炔烃和芳香烃的浓度有助于控制重庆市O₃的生成,控制高碳烷烃和芳香烃则有助于控制重庆市SOA的生成.      

美国市政污水处理排放标准制定对中国的启示

在概述美国市政污水处理排放标准制度体系的基础上,介绍了其制定基于技术的排放限值和基于水质的排放限值的方法,阐述了其制定的科学性,并指出了中国市政污水处理排放标准中存在的相应问题。最后,根据美国制定排放标准限值的经验,对我国污水处理排放标准进行了思考,并提出了科学制定排放标准的方法和建议。     

Construction of vesicle CdSe nano-semiconductors photocatalysts with improved photocatalytic activity: Enhanced photo induced carriers separation efficiency and mechanism insight

Visible-light-driven photocatalysis as a green technology has attracted a lot of attention due to its potential applications in environmental remediation. Vesicle Cd Se nano-semiconductor photocatalyst are successfully prepared by a gas template method and characterized by a variety of methods. The vesicle Cd Se nano-semiconductors display enhanced photocatalytic performance for the degradation of tetracycline hydrochloride, the photodegradation rate of78.824% was achieved by vesicle Cd Se, which exhibited an increase of 31.779% compared to granular Cd Se. Such an exceptional photocatalytic capability can be attributed to the unique structure of the vesicle Cd Se nano-semiconductor with enhanced light absorption ability and excellent carrier transport capability. Meanwhile, the large surface area of the vesicle Cd Se nano-semiconductor can increase the contact probability between catalyst and target and provide more surface-active centers. The photocatalytic mechanisms are analyzed by active species quenching. It indicates that h+and UO_2~-are the main active species which play a major role in catalyzing environmental toxic pollutants. Simultaneously, the vesicle Cd Se nano-semiconductor had high efficiency and stability.     

基于环境质量管理的城市综合环境绩效评估研究

文章以26个省会城市2004~2013年的样本数据,从环境健康、生态保护、资源与能源利用、环境治理等4个方面开展研究,构建了包括4项二级指标、12项三级指标和26项四级指标在内的城市综合环境绩效指标体系。研究发现,大部分城市的综合环境绩效历年差异明显,东、中、西部的环境绩效有明显的差异。因此,文章认为应该进一步优化环境绩效指标体系,充分体现区域差异特点,通过实施城市综合环境绩效考核来提高城市环境质量管理水平。     

外浮顶原油储罐VOCs排放核算参数对排放量的影响研究

依据美国环保署颁布的储罐VOCs排放量核算公式,从环境参数、原油参数和储罐结构参数3个方面对外浮顶储罐VOCs排放的影响进行了研究,其中包括了边缘密封排放挂壁排放、浮盘附件排放和浮盘着陆期间排放等几个相关排放核算数学公式。结果表明:环境风速增大,环境温度升高或太阳辐射强度提高均导致排放量增大;原油温度升高或原油周转量增加也导致排放量增加;储罐直径增加,罐漆颜色浅,或者罐壁锈蚀情况好会降低VOCs排放量。     

高层建筑物火灾危险性分析方法的选择与应用

从方法的类别、评价目标、特点、优缺点以及适用范围等几个方面对目前采用较多的各种火灾危险性分析方法进行比较,总结归纳出每种分析方法的优缺点及其适用范围,并根据高层建筑物火灾的特性以及火灾危险性分析方法的选取原则,选用定量计算与定性分析相结合的方法对高层建筑物火灾危险性进行分析。首先利用层次分析法对高层建筑物火灾危险性所有评价指标的权重进行计算,得到权重值相对较高的评价指标,分别是火灾荷载、防火分区、安全管理制度、火灾自动报警系统、安全制度落实情况;然后利用预先危险性分析方法,从危险有害因素、事故触发条件、事故可能造成的后果、危险等级、事故预防措施这几个方面对以上权重值较高的评价指标进行详细分析。