煤中易挥发有毒痕量元素及其在燃烧过程中的行为

本文综述了煤中易挥发有毒痕量元素汞、砷、硒在煤中的赋存形式 ,在燃烧过程中的蒸发和化学反应等行为 ,指出了在目前研究燃煤过程中有毒痕量元素所存在的问题和需要努力加强的研究方向     

沈阳市大气污染防治对策

本文根据沈阳市的大气污染现状，分析了大气污染形成的原因和特点及影响大气环境质量的主要因素，确定了大气环境质量目标。并提出了近期和２０００年的大气污染防治对策．     

造纸行业的清洁生产示范

文章概述了我国造纸行业清洁生产示范项目审计的成果，从环境、经济及清洁生产方案类型等角度对企业推行清洁生产进行了初步分析，提出了存在的主要问题，并就进一步推动造纸行业的清洁生产提出了建议。     

Concept of common interests of mankind in the global environmental protection

The concept of common interests of mankind in the environmental protec-tion spurred -by the internationalized and globalized environmental problems are discussed in this paper. While making challenges for many principles and rules of international law and the traditional conception of national security, the concept does play its role in strengthening the environmental protection. However, it cannot be neglected that diflerent national interests pose an obstacle to the realization of the common interests of mankind in the envirormental protection. The article concludes that whether the concept plays its greater role in the environmental protection will depend on many factors, such as the spread of environmental awareness, the revision of the traditional conception and the balanced development of the world economy.     

如何培养学生学习数学的兴趣

学习兴趣在学生的学习中占有重要地位。为了培养学生学习数学的兴趣,教师应充分利用数学的学科特点,合理安排教学内容,灵活运用教学方法,并在学生遇到困难时给予及时的帮助。     

粉煤灰对矿井水中重金属离子的吸附研究

本文通过静态热力学实验的方法，研究了粉煤灰对矿井水中Ｐｂ＾２＋，Ｚｎ＾２＋，Ｃｕ６２＋等重金属离子的吸附性能。着重分析了ＰＨ值，吸附时间，粉煤灰活化程度等因素对其吸附能力的影响。     

江苏省环保信访演变趋势与对策研究

以江苏省为例,着重分析环保信访演变的特点和发展趋势以及产生的主要原因,提出了今后进一步加强环保信访工作的对策措施。     

Photodegradation of acetochlor in water and UV photoproducts identified by mass spectrometry

The sunlight photodegradation half-lives of 20 mg/L acetochlor were 151, 154 and 169 days in de-ionized water, river water and paddy water, respectively. When exposed to ultraviolet (UV) light, acetochlor in aqueous solution was rapidly degraded. The half-lives were7.1, 10.1, and 11.5 min in de-ionized water, river water and paddy water, respectively. Photopreduets of acetochlor were identified by gas chromatography/mass spectrometry(GC/MS) and found at least twelve photoproducts resulted from dechlorination with subsequent hydrtrxylation and cyclization processes. The chemical structures of ten photoproducts were presumed on the basis of mass spectrum interpretation and literature data. Photoproducts are identified as 2-ethyl-6-methylaniline; N, N-diethylaniline ; 4, 8-dimethyl-2-oxo- 1,2,3,4- tetrahydroquino-line; 2-oxo-N-(2-ethyl-6-methylphenyl)-N-(ethoxymethyl) acetamide; N-(ethoxymethyl)-2‘-ethyl-6‘-methylformanilide; 1-hydroxyaeetyl-2-ethoxyl-7-ethylind ole; 8-ethyl-l-ethoxymethyl-2-oxo-1, 2, 3, 4-tetrahydroquinoline; 4, 8-dimethyl-l-ethoxymethyl-2-oxo-1, 2, 3, 4-tetrahydroquinoline; 2-hydroxy-2‘-ethyl-6‘-methyl-N-(ethoxymethyl) acetanilide and a compound related to acetochlor. The other two photoproducts were detected by GC/MS although their chemical structure was unknown.     

压缩空气中微量油测定方法的现状与进展

近年来，压缩机制造行业已把压缩空气中微量油浓度作为对压缩机性能评价的一项重要指标。因此，对压缩空气的含油量测定工作越来越得到重视。在制造类企业，压缩空气在生产中有广泛的用途，其对压缩空气的品质有不同的要求。在此介绍了压缩空气中微量油浓度常用的测定方法。包括样品的采集和预处理、标准油的制备以及具体的分析检测手段。     

浅谈水质在线监测仪器的维护与质量控制管理

通过对水质自动监测系统的日常维护与质量控制管理，从水质自动监测系统的维护、室内外质量控制管理、综合分析与控制管理等方面进行分析，提出了保证自动监测系统准确性控制措施，为水质自动监测系统管理提供参考。