Continuous biodegradation of 17beta-estradiol and 17alpha-ethynylestradiol by Trametes versicolor

The feasibility of 17beta-estradiol (E2) and 17alpha-ethynylestradiol (EE2) removal by Trametes versicolor was demonstrated in batch and continuous cultures. In batch, E2 and EE2 initially supplied at 10 mg l(-1) were removed by more than 97% in 24h, which corresponded to volumetric removal rates of 0.43 and 0.44 mg l(-1)h(-1), respectively. A bioreactor inoculated with T. versicolor pellets was then continuously operated during 26 days at a hydraulic retention time of 120 h. E2 and EE2 were completely removed at volumetric removal rates of 0.16 and 0.09 mg l(-1)h(-1), respectively, when fed at 18.8 and 7.3 mg l(-1), respectively. Evidence was found that removal was caused by laccase. This study demonstrates the technical feasibility of fungal treatment of estrogens using continuous bioreactor with suspended fungal biomass.     

纳米TiO2-ACF光催化净化室内空气污染物试验

本文提出了纳米TiO2-ACF复合光催化净化室内空气技术,分析了不同条件下复合光催化净化网的净化效率,对ACF吸附网、纳米TiO2光催化净化网和纳米TiO2-ACF复合光催化净化网净化甲醛的净化性能进行了对比分析.复合光催化净化网在高风速且污染物质量浓度较低时净化效率高于其他两种净化网的净化效率近15%.该净化网对无机和有机污染物具有较强的吸附氧化能力、较小的空气阻力、无中间副产物生成,实现了ACF的原位再生,延长了净化网的使用周期.     

沙质滩涂中反应性与非反应性污染物阻滞效应研究

沙质滩涂受到石油污染后,滩涂-水系统中的石油污染物处在一个物理、化学、生物的相互联系和连续变化之中。为了定量地研究滩涂-水系统反应性石油污染物的动态变化规律,通过水动力弥散实验和一维对流、弥散模型确定了水分和溶质在滩涂-水系统的水-盐动力学参数和反应动力学参数。选择研究区代表性沙样S和Y进行试验,研究结果表明,对于沙质滩涂-水系统中的非反应性污染物,S沙样和Y沙样的渗透系数分别为1.95cm/min和0.76cm/min,弥散系数分别为0.156cm~2/min和0.463cm~2/min;对于沙质滩涂-水系统中的反应性污染物,S沙样和Y沙样的阻滞系数分别为2.55和2.30,分配系数分别为1.93cm~3/g和1.05cm~3/g。     

环境保护 化学工业可持续发展之路─—江苏省化工环保现状与展望

概述了江苏省化工环保现状，回顾了“八五”期间化工环保工作进展，提出了“九五”期间化工环保工作思路、目标与对策，指出化工发展与环境保护相结合是江苏省化学工业可持续发展的必由之路。     

南水北调东线源头水质综合评价及其方法比较

采用标准中内插值的方法生成足够多的样本,用LM改进算法进行训练,模型收敛加速,泛化能力提高,用该网络对南水北调东线源头的断面连续8年的水质数据进行综合评价。建立离散Hopfield网络模型对该数据进行评价,得出客观、全面的水环境质量状况,并针对具体超标的指标给出了改善建议。     

半圆柱顶送风相对两侧墙底部回风矢流洁净室特性研究

对半圆柱形送风口顶送－相对两侧墙底部回风式矢流洁净室进行了数值模拟研究。经Ｋ－ε紊流模型为基础,模拟为该类洁净室内流场和污染物分布,得出了流场特性和污染程序控制物分布规律,提出了优化设计参数。     

两种土压力水平下防渗帷幕的防污能力

为探究防渗帷幕材料在不同荷载作用下导致的渗透性和厚度变化对其防污能力的影响,在对土-膨润土防渗帷幕工程性质分析的基础上,进行了污染物运移计算,分析了不同压力和边界条件下帷幕的击穿时间。结果表明:土-膨润土帷幕材料多属于中压缩性土,帷幕材料在底端压力下渗透系数与初始渗透系数的差异可达1个数量级;常用的相对浓度为10%和稳定通量为5%两种击穿标准所得击穿时间存在较大差异,两者的比值为1.42~2.21;以帷幕底端参数计算的帷幕下游处相对浓度和通量均小于以初始参数计算的结果,前者击穿时间大于后者,以最大压力对应参数所得的设计结果偏于危险。     

两种新型过滤器设计

过滤器是保障液压系统正常运行的重要辅助元件,为了保证液压系统可靠工作,延长液压元件的使用寿命,设计了两种新型过滤器：粗精组合双重过滤器和两（多）级过滤器,前者可以将粗过滤和精过滤在同一过滤器中完成,简化液压系统;后者通过加大过滤面积,在第一级过滤器失效时,启动第二级过滤,延长过滤器的使用寿命,另外可以利用在线式污染度传感器实现液压系统的主动维护.     

Impact of human motion on TVOCs inhalation dose under side re-circulated ventilation

The main objectives were to (1) calculate the total volatile organic compounds (TVOCs) inhalation dose, (2) analyze the proportions of human’s inhaled contaminant dose from different sources, and (3) present a newly defined ratio of relative inhalation dose level (RIDL) to assess indoor air quality (IAQ). A user defined function based on CFD (computational fluid dynamics) was developed, which integrated human motion model with TVOCs emission model in a high sidewall air supply ventilation mode. Based on simulation results of 10 cases, it is shown that the spatial concentration distribution of TVOCs is affected by human motion. TVOCs diffusion characteristic of building material is the most effective way to impact the TVOCs inhalation dose. From the RIDL index, case A-2 has the most serious IAQ problem, while case D-1 is of the best IAQ. Foundation item: Projects(2006BAJ02A08, 2006BAJ02A05) supported by the National Science and Technology Pillar Program Project during the 11th Five-Year Plan Period; Project(2007-209) supported by the Excellent Youth Teacher of Ministry of Education of China     

砷化镓抛光晶片表面沾污的二次离子质谱分析

在砷化镓工艺过程中,很多失效问题与表面的沾污有关,二次离子质谱分析是表面分析的有力手段,本文提供一种用二次离子质谱分析检测砷化镓表面钠、钾和铝的沾污水平的测试方法。