空气质量周报二氧化硫采样过程影响因素的探讨

文章通过对空气质量周报连续采样过程有关影响因素进行探讨 ,分析了影响大气二氧化硫监测结果的一些原因或可能 ,首次对甲醛吸收液连续采样稳定性提出疑问 ,强调周报质量保证的重心要从实验室环节转到现场采样等环节上来     

伊犁地区维吾尔民族氟斑牙研究

应用环境流行病学原理和方法，就可能导致伊犁地区维吾尔民族中发现的氟斑牙的环境化学因子，存在于食物、大气、水、土壤的诸介质进行了调查，并进行了环境因子效应的研究，发现维吾尔民族尿氟较高，平均为２．１９ｍｇ／Ｌ，波动范围为：１．６５～６．１０ｍｇ／Ｌ氟斑牙在维吾尔民族中呈散在发生（２％），总氟摄入量为１０．７５ｍｇ，奶茶中过量氟摄入为主要贡献。     

Survey of phthalate pollution in arable soils in China

The problem of pollution by phthalates is of global concern due to their widespread occurrence, toxicity and endocrine disruption properties. The contamination by phthalates such as dimethyl phthalate (DMP), diethyl phthalate (DEP), di-n-butyl phthalate (DBP) and di(2-ethylhexyl) phthalate (DEHP) in 23 arable soils throughout China was investigated to evaluate the present pollution situation. The survey results demonstrated that phthalates were ubiquitous pollutants in soils in China. The total concentrations of phthalates differed from one location to another, and ranged from 0.89 to 10.03 mg kg(-1) with a median concentration of 3.43 mg kg(-1). Among the phthalates, DEHP was dominant and detected in all 23 soils. DEP and DBP were also in abundance, and DMP was rarely detected. Similar contamination patterns were observed in all 23 soils. A distinct feature of phthalate pollution in China was that the average concentration in northern China was higher than that in southern China. In addition, a close relationship was observed between the concentration of phthalates in soils and the consumption of agricultural film. The correlation showed that the application of agriculture film might be a significant pollution source of phthalates in arable soils of China. The potential risk of phthalates in soils was assessed on the basis of current guide values and limits.     

二噁英类等环境激素污染物的来源监测调查

二英类对环境的污染及对内分泌的干扰作用已引起世界各国的广泛关注。本文叙述了水中二英类的来源 ,在食物链中的迁移、生物富集、生物放大及日本环境空气、土壤、水、底质及生物 ,食品中二英类的存在情况。还报道了世界各国二英类发生源及大致排放量。本文还介绍了目前在国外通用的二英等环境激素类物质的监测分析方法及我国制定此类监测分析方法应考虑的基本问题。     

Evaluating the Efficiency of Coagulation in the Removal of Dissolved Organic Carbon from Reservoir Water using Fluorescence and Ultraviolet Photometry

The present study used ultraviolet absorption (UVa) and the florescence intensity (FI) to evaluate the coagulation efficiency for removing dissolved organic carbon (DOC) in the raw water from Min-Ter, Li-Yu-Ten and Yun-Ho-Shen reservoirs in Taiwan. The results indicated that the ratio of DOC removal rate and FI removal rate was maintained at about 1 at various coagulant dosages. However, the ratio of DOC removal rate and UVa removal rate decreased as the coagulant dosage increased. In addition, after coagulation, the use of florescence intensity instead of total organic carbon (TOC) is better than UVa for measuring the DOC removal rate of the raw waters gathered in different months from the three reservoirs. Furthermore, a good linear relationship between florescence intensity and DOC removal rate was observed, and the DOC/FI ratio of raw water from each reservoir can be used to predict the DOC residual concentration after enhanced coagulation. This result shows that fluorescence analysis can be used for on-line and continuous monitoring the effectiveness of organic matter removal in water treatment.     

悬浮液进样石墨炉原子吸收法直接测定土壤、底泥中的铅、镓、钴、镍

介绍一种悬浮液进样直接测定土壤、底泥中多种微量金属元素的快速分析方法。基体改进剂的使用，适宜的原子化温度的选择，使用水相标准溶液作校准曲线成为可能．对标准作品的测定证明了此方法的精密度和准确度较好，适合于常规环境样品分析．     

珠江咸潮如何治本

咸潮——因海水顺着潮汐倒灌入内江河，导致沿河两岸的水源变咸而得名，这是一种不为内陆民众所熟知的灾害。     

饮水中三卤甲烷形成机理与处理技术现状

综述了水中腐酸氯化产物及其形成三卤甲烷的反应历程及各种环境条件如ｐＨ值，光照及自由基对ＴＨＭｓ形成的影响，并提出控制和去除饮水ＴＨＭｓ的方法。     

杠杆体坯件冷拔成形工艺及其平直度的研究

此文详细介绍了磅称杠杆坯件冷拔成形工艺过程和工艺参数,分析了生产中存在的翘曲、扭曲、旁弯及瓦形等严重形状缺陷的成因,论述了减少形状缺陷、提高平直度的工艺技术措施。     

广西来宾栖霞组缺氧沉积环境地球化学特征

地层的岩石地球化学特征是判断其形成环境氧化还原条件的重要手段之一。本文对广西来宾铁桥剖面栖霞组中层纹状灰岩和含泥质灰岩进行地球化学分析 ,结合栖霞组沉积学和古生态学特征 ,对栖霞组沉积环境进行了探讨。岩石微量元素含量、黄铁矿矿化程度 (DOP值 )、痕量元素V/Cr、Ni/Co、U/Th、V/(V +Ni)等比值的研究结果显示 ,研究区具有缺氧沉积成因的地球化学特征。