碳黑改性TiO2薄膜光催化剂的研制

通过掺杂碳黑来提高TiO2薄膜光催化剂的吸附性能，消除固定膜反应体系中经常出现的传质限制问题，使催化剂的活性由未经改性的3.2mg/L提高到4.8mg/L，相当于浓度为0.2g/L DegussaP25TiO2悬浮体系的效果，同时研究了影响催化剂活性的主要制备条件，获得的适宜制备条件为浓硝酸添加量1.0mL，热处理温度500℃，热处理时间2h，最佳涂覆次数为8次。     

电子工业光致抗蚀剂乳化废水预处理试验研究

研究了光致抗蚀剂乳化废水用硫酸和含钙辅助破乳分离出有机物沉淀的预处理工艺。确定了最合适的预处理工艺参数和流程；用GC／MS法分析了废水的组成和浓度，并探讨了有机物的去除机理。试验结果表明，pH值控制在3，辅助剂A的浓度为300mg/L、静置时间为60min时，是最合适的工艺条件，废水的CODcr值从15600mg/L下降到3542mg/L，CODcr的去除率达77.4%，投加辅助剂后既提高了有机物的去除率，又改善了沉淀物的过滤性能，从而有利于降低后续工艺的处理成本。     

微囊藻毒素的生物降解综述

从微囊藻毒素降解菌、降解途径和影响降解的因素三方面，对国内外微囊藻毒素生物降解的研究现状及发展趋势作一介绍。     

海水中溶解有机磷化合物的生态效应

介绍了海水中溶解有机磷的生物效应及其分析方法。有机磷农药在农业中得到广泛应用并被雨水冲刷进入海水中。农药生产企业排放的污染物已经严重污染近海水体。讨论了有机磷农药的毒性机理和有效利用的方法。     

关于提高挥发酚测定质量的探讨

探讨了在水样采集及分析测定过程中，如何保证分析结果的可靠性和准确性。     

固硫型煤的生产技术和使用效果

针对链式炉炉内脱硫，设计了固硫型煤生产线，通过测试、试验、生产和实际使用，使固硫型煤满足脱硫要求，同时，节能效果也较明显。另外，对固硫剂、粘结剂的选用和配比作了介绍。     

对印染废水治理的几点思考

结合轻工纺织化纤类环评工程师登记培训及日常工作中有关印染废水治理的一些经验和做法，分析探讨了目前印染废水处理工艺技术中存在的问题，诸如提高印染废水的可生化性、降低活性污泥的产量、以及碱减量、退浆废水局部预处理、色度去除的专项处理等问题，提出了可行的解决方案。     

Atrazine degradation in a containerized rhizosphere system

Abstract

The effect of atrazine (2‐chloro‐4‐ethylamino‐6‐isopropylamino‐s‐triazine) on rhizosphere microorganisms and its fate in a containerized rhizosphere system was studied. The rhizosphere system consisted of corn grown in pot containing a defined potting mix of sand and bark with atrazine. Sterilized potting mix and a container without plants served as controls. Atrazine was extracted and analyzed via HPLC. Fluorescent pseudomonad populations increased 100‐fold in the rhizposphere during a 60‐day incubation period as compared to the nonvegetated control. Atrazine degradation was higher in the rhizosphere system (half‐life of 7 days) compared to the nonvegetated control (half‐life of greater than 45 days). The major degradation product detected in the rhizosphere system was deisopropylatrazine; other products detected included deethylatrazine, deethylhydroxyatrazine, deisopropylatrazine and hydroxyatrazine. Hydroxyatrazine was detected in the nonvegetated and sterile controls. The containerized rhizosphere system provides an experimental system to study the fate of pesticidal chemicals as well as the effects on microbial populations.     

微囊化生物流化床处理邻二氯苯废水

采用海藻酸钠—壳聚糖—活性炭(SA-CA-PAC)生物微胶囊包埋优势降解菌用于生物流化床处理邻二氯苯废水。比较了微囊化菌和悬浮菌对废水的降解效果,同时考察了初始浓度、接种量、pH值、温度和曝气量对降解率的影响。结果表明,微囊化菌比悬浮菌拥有更适宜的生长环境,具有更好的pH稳定性和热稳定性。微囊化菌的降解效果优于悬浮菌,处理150 mg/L的邻二氯苯废水的最佳接种量为10%,最适pH为7.5,最适温度为30℃。     

Silica nanoparticles and silver-doped silica nanoparticles induce endoplasmatic reticulum stress response and alter cytochrome P4501A activity

Engineered silica nanoparticles (SiO₂-NPs) find widespread application and may lead to exposure of humans and the environment. Here we compare the effects of SiO₂-NPs and SiO₂-NPs doped with silver (SiO₂-Ag-NPs) on survival and cellular function of human liver cells (Huh7) and Pimephales promelas (fathead minnow) fibroblast cells (FMH). In Huh7 cells we investigate effects on the endoplasmatic reticulum (ER), including ER stress, and interactions of nanoparticles (NPs) with metabolizing enzymes and efflux transporters. The NPs formed agglomerates/aggregates in cell culture media as revealed by SEM and TEM. SiO₂ and SiO₂-1% Ag-NPs were taken up into cells as demonstrated by agglomerates occurring in vesicular-like structures or freely dispersed in the cytosol. Cytotoxicity was more pronounced in Huh7 than in FMH cells, and increased with silver content in silver-doped NPs. Dissolved silver was the most significant factor for cytotoxicity. At toxic and non-cytotoxic concentrations SiO₂-NPs and SiO₂-1% Ag-NPs induced perturbations in the function of ER. In Huh7 cells NPs induced the unfolded protein response (UPR), or ER stress response, as demonstrated in induced expression of BiP and splicing of XBP1 mRNA, two selective markers of ER stress. Additionally, SiO₂-1% Ag-NPs and AgNO₃ induced reactive oxygen species. Pre-treatment of Huh7 cells with SiO₂-1% Ag-NPs followed by exposure to the inducer benzo(a)pyrene caused a significant reduced induction of CYP1A activity. NPs did not alter the activity of ABC transporters. These data demonstrate for the first time that SiO₂-NPs and SiO₂-1% Ag-NPs result in perturbations of the ER leading to the ER stress response. This represents a novel and significant cellular signalling pathway contributing to the cytotoxicity of NPs.