大窑湾疏浚水环境要素变化特征及其相关关系

根据大窑湾后６个泊位疏浚工程本底调查和疏浚监测结果，借助因子分析探讨了疏浚前后水环境要素的变化特征及相关关系，找出了控制污染物分布的主要因子，评价了疏浚对海洋环境的影响。     

洱海地面水环境监测优化布点研究

根据１９８７年以后五年洱海水质监测数据的数理统计分析，选择污染指数大的ｐＨ、ＣＯＤ＿（Ｍｎ）、ＢＯＤ＿５、Ｔ－Ｎ、Ｔ－Ｐ进行单项方差分析，进而再进行灰色关联聚类分析和年际相关分析，确知洱海三个水质监测断面可归于一类。考虑水下地形、湖流、环湖工农业布局，水质监测点优化为两个即可保证其准确性、可控性和代表性。     

活性碳纤维吸附CS2蒸气的热力学研究

通过吸附热力学研究,计算出CS_2蒸气在活性碳纤维(ACF)上的吸附热、吸附功和吸附熵.结果表明,吸附属物理吸附范畴,所用吸附剂样品表面是不均匀的.     

浙江中西部氟的丰度与有关矿产的关系

对区内11个地层系,45个地层组(群)及岩性,岩类分别进行氟丰度和区域地球化学背景研究。全区地层平均含氟。062％,略高于克拉克值,浙西北0.052％,相当克拉克值,浙东南的陈蔡窿起区为0.067％,是一高氟背景区。陈蔡窿起带的Au、Ag、Cu、Pb、Zn相应背景含量也高,特别是黑云斜长片麻岩,可为矿源层。     

自然降尘与常规气象因子的相关分析

笔者整理统计了１９９２年至１９９４年逐月自然降水和与之相应的常规气象因子监测数据，找到了自然降尘的季节性分布规律。在此基础上，求得了自然降尘分别与月平均气温、月平均气压、月平均风速、月平均温度、月降水量、月蒸发量的相关系数，并进行了检验，为污染预报工作提供了科学依据。     

混合填充体系对铬渣中六价铬的阻留作用

以铬渣和粉煤灰为混合填充体系的主要填料，采用柱子淋洗法，通过改变混合填料的配比来研究其对铬渣中Cr(Ⅵ)的阻留作用。试验结果表明，各种混合填充体系对Cr(Ⅵ)均有一定程度的阻留作用，其中I—5校对Cr(Ⅵ)的阻留固定效果最佳，淋出液中Cr(Ⅵ)的质量分数为0．删％，相对阻留效果达94．53％。     

超声波处理石化厂剩余活性污泥

采用超声波处理石化污水处理厂的剩余活性污泥。介绍了超声波对污泥的作用机理，初步研究了超声波处理污泥的影响因素。大功率超声波可以降解生物污泥，释放出其中的有机物。小功率超声波能够改善污泥的膨胀特性、提高污泥沉淀特性和脱水能力、降低污泥的含水率，达到减量的目的。经超声波处理并简单过滤的污泥滤液，COD达到4200mg／L左右，污泥含水率由94％降至85％左右。     

Effect of soil solids concentration in batch tests on the partition coefficients of organic pollutants in landfill liner-soil materials

 The effect of the soil solids concentration in batch tests on the measured values of the partition coefficient (K _p) of organic pollutants in landfill liner-soil material was investigated. Since this study was based on the results of batch and column tests conducted independently, there were limitations to the conclusions derived. The organic compounds tested were benzene, methylene chloride, toluene, trichloroethylene, and p-xylene. The results of this study showed that as soil solids concentrations increased, the measured K _p values of these organic compounds strongly decreased. The observed values of K _p stabilized when the soil solids concentration was above a certain value. Typical K _p values obtained from batch tests conducted under high soil solids concentrations were close to those obtained from column tests. It was concluded that the K _p values of organic compounds measured under low soil solids concentrations, i.e., less than 100 g/l, may not correctly simulate the field situation. Consequently, the values of K _p obtained with low soil solids concentrations can result in an overestimation of the retardation factor of the landfill liner material. Received: March 14, 2002 / Accepted: August 25, 2002     

STREAM DISCHARGE PREDICTION VIA A GRID BASED SOIL WATER ROUTING WITH PADDY FIELDS1

ABSTRACT: A grid based daily hydrologic model for a watershed with paddy fields was developed to predict the stream discharge. ASCII formatted elevation, soil, and land use data supported by the GRASS Geographic Information System are used to generate distributed results such as surface runoff and subsurface flow, soil water content, and evapotranspiration. The model uses a single flow path algorithm and simulates a water balance at each grid element. A linear reservoir assumption was used to predict subsurface runoff components. The model was applied to a 75.6 km² watershed located in the middle of South Korea, and observed stream flow hydrographs from 1995 and 1996 were compared to model predictions. The stream flow predictions of 1995 and 1996 generally agreed with the observed flow, resulting in a Nash‐Sutcliffe efficiency R² of 0.60 and 0.62, respectively. The hydraulic conductivity for percolating water through the saturated layer affected baseflow generation. The levee height of the paddy influenced the time and magnitude of the surface runoff, depending on irrigation management. The model will be used for making low flow management decisions by evaluating the role of each land use to stream flow, especially in case of paddy decrease by gradual urbanization of a watershed.     

填料式浮选柱操作参数的研究

在实验室装置上研究了不锈钢波纹板填料柱的主要操作参数对除油率的影响。研究结果表明：填料可以明显改善气体在柱内的径向分布，可以明显提高浮选柱的操作稳定性。实验确定了波纹板填料式浮选柱的主要操作参数是：最低气体表现线速度3．8cm／s，污水停留时间为5min，浮选剂投加量为5～10mg／L。