低DO浓度下短程硝化试验研究

进水氨氮浓度不变，低DO下启动并运行了短程硝化试验，考察了反应器内的氨氮氧化和亚硝酸盐积累情况。试验结果表明反应器内氨氮几乎全部被氧化，污泥浓度从4500mg／L下降到870mg／L，此时亚硝酸盐的积累率为55％，说明只控制DO的浓度很难实现高的积累率，同时受到温度和污泥龄等的较大影响。     

Spatial variations in daily average CO2 concentrations above wetland surface of Xianghai National Nature Reserve, China

Horizontal and vertical variations of daily average CO2 concentration above the wetland surface were studied in Xianghai National Nature Reserve of China in August, 2000. The primary purpose was to study spatial distribution characteristics of CO2 concentration on the four levels of height(0.1 m, 0.6 m, 1.2 m and 2 m) and compare the differences of CO2 concentration under different land covers. Results showed that daily average CO2 concentration above wetland surface in Xianghai National Natural Reserve was lower than that above other wetlands in northeast China as well as the worldwide average, suggesting that Xianghai wetland absorbed CO2 in August and acted as“sink” of CO2. The horizontal variations on the four levels of height along the latitude were distinct, and had the changing tendency of“decreasing after increasing” with the increase of height. The areas with obvious variations were consistent on different levels of height,and those with the highest variations appeared above surface of shore, sloping field, Typha wetland and Phragmites wetland; the vertical variations were greatly different, with the higher variations in Phragmites wetland and Typha wetland, and the lands near the shore and the sloping field with the lower variations. Spatial variations of daily average CO2 concentrations above wet!and surface were affected by surface qualities and land covers.     

广州荔湾湖整治前后生态环境变化调查

章根据广州荔湾湖清淤截污前后水质监测结果、水生物藻类和鱼类鉴定及荔湾湖周边植被调查进行综合分析，结果表明：荔湾湖水质有了一定的好转，生物多样性也有明显改善，但湖水水质仍处于富营养状态，部分污染物浓度仍较高。因而，荔湾湖的环保工作应进一步加强，使该湖区水质达到广州市水质标准。     

"九五"期间重庆市空气环境质量现状、变化趋势及对策

根据多年来重庆市空气环境质量监测资料，较全面、系统地对重庆市空气环境质量状况、变化趋势进行了分析研究，并提出了改善空气环境质量的对策建议。     

大庆地区空气中气相有机物组成及其来源的分析

采用先进科学的分析技术在大庆地区空气中有气相有机物的组成进行了分析，共定性出６５种有机化合物，其中烷烃４２种，烯烃９种，苯系物７种，其它有机合物７种，对６个代表不同地区特点的监测点所定性出的主要有机化合物的来源进行了分析。     

室内尘埃与吸尘器

居室是人们生活、休息的重要场所,人在室内时间约占全天的1/2至2/3。创造一个清洁舒适的居住环境是至关重要的,对促进健康和保持愉快都不可少,对婴幼儿来说,还有益于发育和健康成长。然而,当一束阳光照射到室内时,即可看到无数尘埃在空气中飘浮,这些尘埃是从哪里来的?对人的身体健康又会产生什么样的影响呢?     

造纸黑液厌氧发酵处理及木质素回收应用技术

治理主要对象为造纸厂草浆制浆蒸煮废液——黑液．其性质及污染物指标，随纸张种类、原料和蒸煮工艺的不同，有很大差别．pH值由12至9不等．黑液中含有大量木质G素及半纤维素等有机物质，还有蒸煮药剂及蒸煮过程中的化学产物，成分比较复杂．其COD浓度由22000mg／L至90000mg／L不等，     

鄱阳湖典型湖流流场与污染物浓度场的数值模拟

本文利用有限差分法分别求解二维浅水方程组和对流扩散方程.模拟鄱阳湖的典型湖流流场和湖水中有机污染物(COD)的浓度场.计算结果与实测数据颇为接近.     

模糊数学法在大同矿区空气环境质量评价中的应用

利用模糊数学法对大同矿区空气环境质量进行了评价。评价结果显示矿区空气环境质量属于污染级，其中口泉沟污染最重，其次为平旺地区，云岗沟污染最轻且达到安全级水平，矿区污染因子由重到轻依次为：TSP、SO2、CO、NOx。