气溶胶中的水溶性有机物研究进展

首先指出了对气溶胶中水溶性有机物（ ＷＳＯＣ） 研究的意义，接着对气溶胶中水溶性有机物的分子组成、来源和浓度水平进行了介绍，综述了采样和分析方法的历史及其进展，并对当前研究工作中存在的问题和在中国的应用前景进行了评述     

人体需要经常补硒

从硒的生物学作用和防治疾病等方面剖析了硒与人体健康的关系；从元素地球化学、生物地球化学和化学地理等方面探讨了我国缺硒区的形成、分布和等级的划分；从环境地球化学物质场和元素生物地球化学营养链等方面．阐明了作物、禽畜和人体缺硒的原因、危害及其人体补硒的途径和方法，提出了在缺硒区运用元素生物地球化学营养链营养结构模式的原理、和技术方法，从土壤中获取富硒有机食品，供居民食用，是进行食物补硒、提高人体摄硒量、提高人体免疫功能和防治缺硒病症的根本措施。     

渗滤液回灌设计中一些参数的理论研究

考虑填埋场中微生物对污染物的生物降解作用 ,建立了描述回灌条件下填埋场内渗滤液迁移规律的数值模型。通过建立的模型分析了回灌设计中的一些技术参数 (如水力负荷、有机负荷及配水次数等 )对回灌处理效果的影响规律 ,以供实际工程参考     

·OH的形成机理及在水处理中的应用

以产生大量·OH为特点的高级氧化水处理技术已逐渐成为各国水处理技术研究的热点。在讨论·OH氧化能力的同时 ,重点讨论了Fenton法、纳米光催化氧化法、电化学催化降解法以及超声降解法·OH的形成机理 ,介绍了它们在水处理中的工业化应用及进展情况 ,展望了今后在该领域中多种氧化降解方法协同作用的发展方向     

环境生物技术

环境生物技术作为一门新兴边缘学科在解决环境污染问题上具有很大的潜力。主要介绍了环境生物技术在各方面的研究应用进展 ,并指出环境生物技术的发展趋势和应用前景     

含氯有机物非生物降解方法的最新研究进展

通过介绍目前国际上对含氯有机物的非生物降解方法的最新研究成果,包括零价金属还原、金属组合体系还原脱氯、含铁化合物还原降解、催化加氢还原以及机械化学方法等.分析了每种技术的具体应用和存在的问题以及这些处理方法的发展方向等.     

Effects of methyl-CD and humic acid on hydrolytic degradation of the herbicide diclofop-methyl

Hydrolytic degradation of the herbicide diclofop-methyl was investigated in the multi-pH deionized water, natural aquatic systems and soil suspensions. Resulting data indicated that the herbicide was stable in the acidic and neady neutral solutions for at least 15 d. The herbicide diclofop-methyl rapidly dissipated in the natural aquatic systems and soil suspensions with half-lives less than 4 d. Methyl-CD(partially methylated β-cyclodextdn) improved its hydrolytic degradation in the pH 8 deionized water and natural aquatic systems while humic acid inhibited its hydrolytic degradation at the same conditions. But dissolved organic matter in the natural aquatic systems and soil suspensions increased its hydrolysis. Two catalysis mechanisms were introduced to describe the effects of cyclodextrin and organic matter on its hydrolytic metabolism. Though inorganic ions maybe improved its hydrolysis reaction in the natural aquatic systems, Fe^2 and Cu^2 did not form complexes with the herbicide and had poor influences on its hydrolytic degradation whether cyclodextrin was added or not.     

有机物质与土壤结构

土壤结构是土壤物理学中最本质的部分．而有机物质对土壤结构的形成和稳定起着重要作用．本文就有机物质对有机无机复合作的形成及其对土壤结构的影响进行讨论．     

超临界水氧化有机废水动力学分析

根据推流式超临界水氧化 (SCWO)反应器处理有机废水的动力学方程式 ,结合近年来超临界水氧化降解各种有机废水的实验研究情况 ,对超临界水氧化有机废水的反应动力学影响因素进行了综合分析 ,同时指出了该技术在有机废水处理中的应用优势和存在问题。     

Modelling the environmental degradation of water contaminants. Kinetics and mechanism of the riboflavin-sensitised-photooxidation of phenolic compounds

The aerobic visible-light-photosensitised irradiation of methanolic solutions of either of the phenolic-type contaminants model compounds (ArOH) p-phenylphenol (PP), p-nitrophenol (NP) and phenol (Ph), and for two additional phenolic derivatives, namely p-chlorophenol (ClP) and p-methoxyphenol (MeOP), used in some experiments, was carried out. Employing the natural pigment riboflavin (Rf) as a sensitiser, the degradation of both the ArOH and the very sensitiser was observed. A complex mechanism, common for all the ArOH studied, operates. It involves superoxide radical anion (O₂^√−) and singlet molecular oxygen (O₂(¹Δ_g)) reactions. Maintaining Rf in sensitising concentrations levels (≈0.02 mM), the mechanism is highly dependent on the concentration of the ArOH. Kinetic experiments of oxygen and substrate consumption, static fluorescence, laser flash photolysis and time-resolved phosophorescence detection of O₂(¹Δ_g) demonstrate that at ArOH concentrations in the order of 10 mM, no chemical transformation occurs due to the complete quenching of Rf singlet excited state. When ArOH is present in concentrations in the order of mM or lower, O₂^√− is generated from the corresponding Rf radical anion, which is produced by electron transfer reaction from the ArOH to triplet excited Rf. The determined reaction rate constants for this step show a fairly good correlation with the electron-donor capabilities for Ph, PP, NP, ClP and MeOP. In this context, the main oxidative species is O₂^√−, since O₂(¹Δ_g) is quenched in an exclusive physical fashion by the ArOH. The production of O₂^√− regenerates Rf impeding the total degradation of the sensitiser. This kinetic scheme could partially model the fate of ArOH in aquatic media containing natural photosensitisers, under environmental conditions.