Feasibility study of photoelectrochemical degradation of methylene blue with three-dimensional electrode-photocatalytic reactor

The photoelectrochemical degradation of methylene blue in aqueous solution was investigated with three-dimensional electrode-photocatalytic reactor. It was found that the methylene blue could be degraded more efficiently by photoelectrochemical process than by photocatalytic oxidation or electrochemical oxidation alone. The decolorization efficiency and COD reduction were 95% and 87% for a photoelectrochemical process, respectively, while they were only 78% and 68% for a single electrochemical process and 89% and 71% for a single photochemical process. The TOC reduction of the former also reached as high as about 81% within a reaction time of 30.0 min. And these degradation reactions conformed to pseudo-first-order kinetics.     

Comparison of models for describing measured VOC emissions from wood-based panels under dynamic chamber test condition

Measured emission factors are the experimental data used to represent emission characteristics of volatile organic compounds (VOCs) from testing materials under dynamic chamber test conditions. A simple empirical model that describes the measured emission factors will be very useful for practical purposes. In this study, a power law model was compared with a widely used first-order exponential decay model in their ability to describe measured emission factors of wood-based panel materials. It was demonstrated that the power law model is a better choice than the first-order model for describing emission characteristics for short-term (less than 100 h) experimental data. The power law model was also more superior in predicting long-term (up to 900 h) emission factors.     

选择性催化还原NO反应的研究进展

本文介绍了近年来选择性催化还原ＮＯ反应的研究进展状况，并对目前研究中存在的问题及今后研究的方向提出一些看法。     

前处理-水解-生物接触氧化工艺处理染料废水

介绍了前处理-水解-生物接触氧化工艺处理染料废水的工程实例.当进水COD≤8000 mg/L时,出水可达到国家<污水综合排放标准>(GB8978-1996)二级标准.     

TiO2膜降解水中污染物的稳定性考察与再生方法研究

针对实际水处理中对催化剂性能的要求,以光催化降解苯酚溶液作为探针反应,考察了玻璃纤维网上负载的TiO2膜催化剂长期使用条件下的稳定性,研究了催化剂在自来水中使用失活后的再生方法.结果表明,经过50次使用之后,膜催化剂120 min反应对苯酚的降解率从100%下降至83%,总体上看,所制催化剂还是具有相当好的稳定性;在反应器中用蒸馏水浸泡配合光催化反应对TiO2膜催化剂进行原位再生是一种可行的再生途径.     

气相色谱法分离和测定合成革用胶粘剂中的挥发性有机物

对合成革用胶粘剂中的发挥有机成份进行了色谱分离，并测定了胶粘剂中的9种挥发性有机物，方法的加标回收率为89.4%～102.8%，变异系数为1.2%～5.0%。     

涕灭威对地下水污染敏感区的预测与区划试点

本文根据涕灭威在室内模拟试验与田间试验的结果，详细剖析了影响涕灭威农药在土壤中残留和移动的各种因子，建立了涕灭威农药对地下水污染的敏感性模型，并就涕灭威农药在江苏使用后对地下水可能造成污染的情况进行了预测与区划试点，结果与用美国环保局提供的ＰＲＺＭ模型计算结果和田间实测结果基本一致，本模型可用于预测涕灭威农药在其它地区使用后对地下水可能造成污染的情况。     

vis/H2O2/草酸铁处理活性艳红染料的实验研究

采用vis/H2O2/草酸铁法,对活性艳红染料废水进行处理.研究了H2O2、K2C2O4和Fe2(SO4)3·7H2O的投加量、pH值和光照时间等因素对染料废水处理效果的影响和最佳处理条件.结果表明,pH值2.5;30%H2O2的投加量0.1 mL;0.1 mol/L Fe2(SO4)3·7H2O的投加量1.0 mL;0.1 mol/L K2C2O4的投加量1.5 mL;光照时间40 min的最佳条件下,70 mg/L的活性艳红模拟染料废水脱色率可达99.82%.通过对vis/H2O2/草酸铁法和Fenton法、H2O2法、草酸铁法等方法进行对比实验,vis/H2O2/草酸铁法明显优于其他方法,是一项有研究价值和开发应用前景的污染治理新技术.     

固载型TiO2光催化反应器对富营养水体杀藻作用研究

以泡沫镍作为载体，利用电沉积技术将纳米TiO₂负载在泡沫镍上，制成固载型TiO₂光催化反应器。研究表明，经过光催化反应器处理的富营养水体，30 h内叶绿素a由96.2 mg/m³降至2.2mg/m³，下降率达97.6％，而未负载纳米TiO₂普通泡沫镍材料，在同样光强的紫外灯照射下，叶绿素a下降率为74.3％，表明紫外光照射虽然也具有一定的杀藻功能，但是光催化反应才是藻类被杀灭的主要原因。利用9.54 m³景观喷水池进行杀藻中试，光催化反应器也同样表现出优异的杀藻性能，12 d内叶绿素a由18.7 mg/m³降至1.9mg/m³，下降率达到89.8％，水体由浓绿变为清澈见底，这表明光催化反应器具有很强的杀藻能力，通过有效杀灭富营养水体中藻类、控制藻类基数，对应急处理城市景观水、湖泊等富营养水体和突发性藻华，提高生物-生态法处理效率，改善城市水环境具有十分重要的意义。     

Adsorption of arsenate on soils. Part 1: laboratory batch experiments using 16 Chinese soils with different physiochemical properties

Laboratory batch experiments were carried out to study the adsorption of arsenate on 16 Chinese soils with different physicochemical properties. Wide differences in arsenate adsorption were observed, and the Jiangxi and Hubei soils were more effective sorbents for arsenate than other soils. The Langmuir one-surface and two-surface equations were used to model the arsenate adsorption data. Except for the Jiangxi and Hubei soils, the Langmuir one-surface equation gave reasonably good fits to the arsenate adsorption data. However, the Langmuir two-surface equation generally provided a better fit than the Langmuir one-surface equation. For soils with relative high organic matter (OM), dissolved organic carbon (DOC) or extractable phosphate, the Langmuir one-surface and two-surface equations described the adsorption isotherms similarly. In contrast, for soils with relatively low contents of OM, DOC or extractable phosphate, the Langmuir two-surface equation gave the better fit to the arsenate adsorption data.