某联合站轻烃回收装置职业病危害控制效果评价

目的:评估职业病防护设施防护效果,促进现场职业病防护,保护职工身体健康。方法:运用职业卫生检测法、现场调查法等方法对某建设项目进行职业病危害控制效果卫生学评价。结果:有毒物质检测均符合相关标准要求,天然气压缩机处噪声达94.3dB(A),超过职业接触限值。结论:改进噪声防护设施,达到相关标准要求。     

典型行业中水回用技术及水质评价标准浅析

在水资源日益短缺的今天,中水回用作为开源节流的有效途径,将成为今后的发展趋势。文章介绍了电子、汽车制造、啤酒等几个典型行业中水回用技术,并对回用水质的评价标准如何制定作出探讨。     

液中放电等离子体降解TNT废液数学模型研究

文章采用液中放电等离子体降解TNT废液,影响降解的因素为放电时间、放电电压、电极间距、气流量、初始浓度、初始电导,采用了无因次方法对降解效率与影响因素之间进行了关联,建立了降解过程的数学模型,并对数学模型进行了分析,得出的结论是:模型方程的置信度为0.71,方程回归系数都显著不等于零,所求的模型是实用的,这为下一步的放大改进工作奠定了良好的基础。     

中国发展低碳经济的路径选择

绿色技术创新和建立碳排放权市场交易机制是促进低碳经济发展的主要措施。前者的实施主体是企业,后者的实施主体是政府。文章分析了在市场和垄断两种情况下的碳排放交易机制与绿色技术创新结合的结果的变化。分析认为,在市场机制充分发挥作用时,绿色技术创新可以替代碳排放权;在存在垄断的情况下,绿色技术创新对碳排放权具有补充作用;碳排放交易制度与绿色技术创新结合起来是中国发展低碳经济的必然选择;现阶段,碳排放权的分配应以免费分配为主,有偿分配为辅。     

低碳经济背景下河北省产业结构调整运行机制探索

主要分析了河北省发展低碳经济优化升级产业结构的驱动力,借鉴发达国家低碳经济与产业结构调整运行机制的实践经验,提出了发展河北省低碳经济与产业结构调整运行机制的策略。     

Forest Management in Northeast China: History,Problems, and Challenges

Studies of the history and current status of forest resources in Northeast China have become important in discussions of sustainable forest management in the region. Prior to 1998, excessive logging and neglected cultivation led to a series of problems that left exploitable forest reserves in the region almost exhausted. A substantial decrease in the area of natural forests was accompanied by severe disruption of stand structure and serious degradation of overall forest quality and function. In 1998, China shifted the primary focus of forest management in the country from wood production to ecological sustainability, adopting ecological restoration and protection as key foci of management. In the process, China launched the Natural Forest Conversion Program and implemented a new system of Classification-based Forest Management. Since then, timber harvesting levels in Northeast China have decreased, and forest area and stocking levels have slowly increased. At present, the large area of low quality secondary forest lands, along with high levels of timber production, present researchers and government agencies in China with major challenges in deciding on management models and strategies that will best protect, restore and manage so large an area of secondary forest lands. This paper synthesizes information from a number of sources on forest area, stand characteristics and stocking levels, and forest policy changes in Northeastern China. Following a brief historical overview of forest harvesting and ecological research in Northeast China, the paper discusses the current state of forest resources and related problems in forest management in the region, concluding with key challenges in need of attention in order to meet the demands for multi-purpose forest sustainability and management in the future.     

FMEA在乳化炸药螺杆泵中的应用

以乳化炸药螺杆泵为研究对象,画出系统功能方框图和可靠性方框图,应用故障模式及影响分析方法(FMEA),确定螺杆泵的各种可能故障模式、故障原因和故障影响。同时计算出各故障的风险度,并依次对故障进行分级,找出对螺杆泵危害严重的故障。最后建立FMEA表格,并根据分析结果提出提高其可靠性的建议措施。     

不同组成有机质对土壤中砷迁移行为的影响

本研究选择腐植酸(HA)、黄腐酸(FA)和鸡粪提取的可溶性有机质(DOM)三种天然有机质,加入供试土壤,以溴离子作为示踪剂,通过四组模拟土柱实验,获得不同有机质组成的土壤中As (V)的穿透曲线,并用CXTFIT 2.1软件拟合,计算阻滞系数R_d值,同时测定流出液中As (V)的形态变化。结果表明:HA抑制了As (V)的迁移,而加入FA和DOM后As (V)在土壤中的移动性显著增强。四种处理(CK、土壤+HA、土壤+FA、土壤+DOM)中As (V)的阻滞系数R_d值分别为17.82、19.53、10.13和12.2,土柱中残留的As分别占As总量的27.4%、31.7%、19.2%和18.2%。腐植酸以芳香族含量为主,分子量较大,吸附固定As的能力较强;黄腐酸和提取的可溶性有机质主要结构为烷基碳和氧烷基碳,H/C和O/C值较高,与As存在竞争吸附,促进As的迁移。     

The dynamic links among energy consumption,tourism growth,and the ecological footprint: the role of environmental quality in 38 IEA countries

Environmental Science and Pollution Research - We examine the impact of energy consumption and tourism growth on the ecological footprints and economic growth of 38 International Energy Agency...     

硫化砷渣全湿法制备单质砷的研究

以硫化砷渣为原料,用氯化铜酸性溶液浸出砷渣的全湿法进行实验,着重研究氯化铜浸出砷的过程中氯化铜用量、溶液p H和浸出时间对砷浸出率的影响,探讨用氯化亚锡还原砷盐酸溶液从硫化砷渣得到单质砷的方法。