广州郊区农业土壤重金属含量与土壤性质的关系

研究了广州郊区农业土壤性质和土壤中的重金属含量,并对2者的相关关系进行了分析。结果表明:广州郊区农业土壤中壤土占样品总数的70.5%,土壤pH值平均为5.93,土壤有机质平均含量为31 7g·kg-1,土壤阳离子交换量不高,且各区之间变幅较大;Cu、Pb、Zn、Ni、Cd、As和Hg有效态含量在3种土壤中顺序为菜园土>水稻土>赤红壤;土壤重金属和土壤理化性质间的关系复杂,如有效态Cu、Zn、Ni与土壤有机质含量呈极显著相关,Cd与土壤有机质含量和土壤粘粒含量呈极显著相关,As除与有机质含量和粘粒含量有关,与pH、阳离子交换量也有极显著相关关系。     

Enhanced adsorption for Pb(II) and Cd(II) of magnetic rice husk biochar by KMnO4 modification

Environmental Science and Pollution Research - Novel KMnO4-treated magnetic biochar (FMBC) was successfully synthesized by addition of Fe(NO3)3 during carbonization and KMnO4 treatment following...     

Combined effects of air pollution in adulthood and famine exposure in early life on type 2 diabetes

Environmental Science and Pollution Research - Famine exposure or air pollution is linked to type 2 diabetes mellitus (T2DM). However, their combined effects on T2DM remain largely unknown. A total...     

Design a flower-like magnetic graphite carbon microsphere for enhanced adsorption of 2,4-dichlorophenol

Environmental Science and Pollution Research - 2,4-Dichlorophenol (2,4-DCP) is a hazardous chlorinated organic chemical, so its removal is an important task to protect the whole ecosystem and human...     

青岛市可持发展环境优势与战略对策

作为北京奥运的唯一伙伴城市,面对历史性的机遇和挑战,青岛市在加快建设和发展步伐的同时,坚持人与自然和谐、山海城协调、历史与现代交融、经济社会全面进步的可持续发展原则,不断推进青岛的生态城市建设,可以预见,青岛市完全符合举办一流奥运会的要求将成为现实。     

微生物对石油污染物的降解作用

针对油井附近落地油污染地表土壤的问题,利用热蒸发色谱技术,对油污土壤中加入微生物对原油的降解特征进行了实验研究。实验结果表明,在油污土壤中加入微生物,对落地油有明显的降解作用,可以减轻石油生产过程中油污对土壤的破坏和对环境的污染。随着微生物降解作用的不断进行,土壤中污油的相对降解速度逐渐加快,相对降解率逐渐增加。生物处理法的过程较简单,处理费用低,处理效果好,一般不会产生二次污染。     

中国石油HSE信息系统现场实施方案

对于中国石油这样的大型企业,信息系统建设的成功与否,除取决于系统的软件和硬件之外,一整套行之有效的现场实施方案也尤为重要。文章从中国石油HSE信息系统现场实施策略、实施流程、实施效果等方面进行阐述,总结出了一套适合中国石油业务管理信息系统的现场实施方案。     

Emission factors of polycyclic aromatic hydrocarbons from domestic coal combustion in China

Domestic coal stove is widely used in China, especially for countryside during heating period of winter, and polycyclic aromatic hydrocarbons （PAHs） are important in flue gas of the stove. By using dilution tunnel system, samples of both gaseous and particulate phases from domestic coal combustion were collected and 18 PAH species were analyzed by GC-MS. The average emission factors of total 18 PAH species was 171.73 mg/kg, ranging from 140.75 to 229.11 mg/kg for bituminous coals, while was 93.98 mg/kg, ranging from 58.48 to 129.47 mg/kg for anthracite coals. PAHs in gaseous phases occupied 95% of the total of PAHs emission of coal combustion. In particulate phase, 3-ring and 4- ring PAHs were the main components, accounting for 80% of the total particulate PAHs. The total toxicity potency evaluated by benzo[a]pyrene-equivalent carcinogenic power, sum of 7 carcinogenic PAH components and 2,3,7,8-tetrachlorodibenzodioxin had a similar tendency. And as a result, the toxic potential of bituminous coal was higher than that of anthracite coal. Efficient emission control should be conducted to reduce PAH emissions in order to protect ecosystem and human health.     

动力扰动作用下充填体的力学响应研究

稳定的充填体是二步骤矿房回采的安全保障。在采矿动力作用下实现充填体的稳定性预测,是二步开采的安全控制关键。为了研究不同扰动幅值下充填体的动力响应规律,以某矿山工程为研究对象,采用Midas/GTS与FLAC3D数值模拟技术,建立了充填体动力稳定性分析的三维数值模型并进行了数值模拟分析。研究结果表明:动力扰动作用下,充填体暴露面的破坏区域由四周逐渐向中心扩展,并随着动力扰动幅值的增加,充填体暴露面破坏区域逐渐增大直至贯通破坏;充填体暴露面质点峰值振动速度随着动力扰动峰值的增加而增加,并得出了适用于该矿充填体暴露面振动峰值速度与动力扰动幅值之间的函数关系。距动力加载面越远,充填体内部质点峰值振动速度越小,且距动力加载面0~12 m处,质点峰值振动速度衰减较慢,从12~20 m质点峰值振动速度下降趋势最为明显。     

Sustainable Development and Corporate Environmental Responsibility: Evidence from Chinese Corporations

China is currently experiencing rapid economic growth. The price of this, however, is environment pollution. Many Chinese corporations are lacking in corporate environmental responsibility (CER). Therefore, this study employs data from Chinese and multinational corporations to identify why Chinese corporations seldom engage in CER by investigating their motivations and stakeholders. The results show that the most important reason why Chinese corporations do not engage in CER is the fact that their competitive strategy of cost cutting makes them limited in resources, such as money, employees, information, or added value. Further study implies that Chinese corporations face more survival pressure, though they are willing to take environmental responsibilities as multinational corporations do. The results also imply that government and social surroundings can play an important role to arouse CER consciousness of Chinese corporations in all stakeholders. Consequently, Chinese government has a heavy duty to promote corporations to respond to their CER in the long run.