如何合理地估算活度系数是水环境化学数值模拟工作中必须慎重考虑的问题。
How to estimate the activity coefficient of a chemical species is a problem which we must deal with carefully.
探究应用化学基础教学中进行水资源与水环境教育的意义及措施。
This paper studies the meanings and measures of water resource and water environment teaching in elementary teaching of Applied Chemistry.
通过现场腐蚀挂片、室内模拟实验和电化学测量研究了A3钢在富营养化淡水环境中和洁净淡水环境中的腐蚀行为及影响因素。
The corrosion behaviors of A3 steel in eutrophic water and clean water were studied by locale corrosion specimen and experiments in simulant condition.
水环境中2,4,6 -三氯酚的光化学降解研究。
Study of 2, 4, 6-trichlorophenol photochemical degradation in aquatic environment.
结果表明，镘头组下部的硅质层是同生期生物化学作用成因的，形成于潮下低能浅水环境；
The siliceous rocks of the lower Mantou formation were resulted from the biochemical action during the sedimentary period and formed in the environment of low-tide shallow sea.
本文从构造、地貌、水文地质和水环境、岩矿地球化学等方面特征，论证了高砷水分布区的成因，从而为改水提供了基础。
Based on the characters of structure, land form, hydrogeology, water environment, rock and mineral geochemistry, and so on, this paper has studied the origin of the distribution of high-arsenic water.
水环境背景值是水环境地球化学研究的重要内容。
The background value of water environment is the major subject of geochemical research of water environment.
根据2001 ~ 2005年湘潭市城区降水环境质量监测数据，对湘潭城区酸性降水的变化特征、离子化学组成、变化趋势和酸雨成因进行了分析。
The changing characteristics and chemical components and origin of acid rain in Xiangtan urban area are analyzed according monitoring data of precipitation quality from 2001 to 2005.
一个合理的地下水水质模型必须充分考虑地下水环境系统和各种水文地球化学平衡对污染迁移的影响，这在数学处理上是个难点。
It's necessary to consider fully the influence of groundwater environment system and all kinds of hydrogeochemistry balance to the migrating of pollutant.
课程包括植物生理学、生物化学、除虫剂使用规章、森林虫害预防、有害化学物质清理和水环境清理。
Courses may include plant physiology, biochemistry, current pesticide regulations, forest pest suppression, chemical decontamination, and aquatic weed management.
介绍了一种新型的化学发泡气体充填与固体充填减轻制备的低密度低温深水水泥浆体系，并对其在海洋深水环境下的性能进行了系统的室内评价研究。
A new low temperature and deepwater slurry system prepared with chemical foaming gas and solid packings, which can reduce the density of the slurry, is introduced.
电化学噪声技术可用于动态高温高压水环境中，并可实现对材料腐蚀敏感性的监检测。
The results showed EN could be used to detect local corrosion sensitivity evaluation at high temperature and pressure with dynamic water system.
农药的光化学降解是海水中农药残留污染物去除的重要途径，其降解过程和降解产物对海水环境的影响很大。
The processes of photodegradation of pesticides play a key role in the transformation of pesticides in the marine environment.
通过实际环境腐蚀试验和电化学测试，研究了粉末渗锌涂层和达克罗涂层在不同水环境中的耐蚀性能。
Corrosion resistance of zinc impregnation and dacromet coating was studied by environmental corrosion test and electrochemical measurement techniques.
介绍了碳钢在淡水环境中的腐蚀行为及影响因素。淡水环境中碳钢主要存在电化学腐蚀和微生物腐蚀。
This paper introduced the corrosion behaviors of the carbon steel and the influencing factors in fresh water environment.
介绍了碳钢在淡水环境中的腐蚀行为及影响因素。淡水环境中碳钢主要存在电化学腐蚀和微生物腐蚀。
This paper introduced the corrosion behaviors of the carbon steel and the influencing factors in fresh water environment.
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