ZE-1号印染废水脱色菌群结构与功能的研究

印染废水是水体的主要工业污染源之一。研究表明,利用微生物对印染废水进行脱色处理是一条可行的途径。浙江省环保科研所曾选育得到一组脱色性能较好,具有应用前景的混合菌群。命名为ZE-1号脱色菌群。     

坚持理论与时俱进促进防震减灾事业全面健康发展

本文结合当前共产党员先进性教育活动,贯彻科学发展观,从本地实际出发,就坚持理论,把握规律,创新思路,全面促进防震减灾事业发展的有关理论和实践问题进行了分析、探讨.     

厌氧折流板反应器(ABR)的水动力学及污泥特性

ABR作为一种新型的厌氧反应器工艺 ,具有许多优良的性能 ,如良好的水力条件及抗冲击能力、简单的构造、良好的生物种群分布及处理效果等。目前 ,其在不同废水处理中运行效果已得到越来越多的研究和实际应用。在此就该工艺的水力流态及污泥性能作了探讨     

缺氧反硝化去除难降解杂环化合物吡啶研究

在实验室中，采用好氧、厌氧和缺氧间歇试验，研究焦化废水中一种难降解有机物--吡啶的生物降解性能。试验主要研究了在缺氧状态下吡啶的生物降解性能、适宜的N/C比、N源的变化情况等。研究结果表明，缺氧反硝化状态下吡啶的生物降解性能有显著的提高。     

Phosphorus export by runoff from agricultural field plots with different crop cover in Lake Taihu watershed

ＩｎｔｒｏｄｕｃｔｉｏｎＷａｔｅｒｅｕｔｒｏｐｈｉｃａｔｉｏｎｉｓｏｎｅｏｆｔｈｅｇｌｏｂａｌｅｎｖｉｒｏｎｍｅｎｔａｌｐｒｏｂｌｅｍｓ ,ａｎｄａｇｒｉｃｕｌｔｕｒａｌｎｏｎｐｏｉｎｔｓｏｕｒｃｅｐｏｌｌｕｔｉｏｎｈａｓｂｅｅｎｇｉｖｅｎｉｎｃｒｅａｓｅｄａｔｔｅｎｔｉｏｎ (Ｓｈａｒｐｌｅｙ ,1994 ;Ｈａｒｒｉｓ ,1995;Ｔｉｅｓｓｅｎ ,1995;Ｔｏｎｄｅｒｓｋｉ,1996;Ｄａｎｉｅｌ,1998) .Ｌａｋｅｅｕｔｒｏｐｈｉｃａｔｉｏｎｈａｓｂｅｅｎｉｄｅｎｔｉｆｉｅｄａｓａｃｒｉｔｉｃａｌｐｒｏｂｌｅｍｏｆｓｕｒ…     

浅析胶莱盆地边缘层间滑动断层构造及其控矿机制

层间滑动断层构造产出于胶莱拉分盆地边部莱阳组砾岩与下伏下元古界荆山群变质岩系的不整合面上 ,是胶莱盆地东北缘蓬家夼和发云夼层间滑动角砾岩型金矿化的主要部位。层间滑动断层是在中生代白垩纪期间中国东部古板块和郯庐断裂构造活动造成的区域大地构造背景下 ,在胶莱走滑拉分盆地的形成过程中产生的。在层间滑动断层由张性应力环境向挤压应力环境过渡过程中 ,源于地壳深部的金矿成矿流体 ,与大气降水混合形成工业金矿体 ,金矿化主要发生在构造角砾岩及碎裂岩的胶结物内 ,金矿化类型和强度具有明显的对称性。层间滑动断层以其产出于特定的部位、产状、成因及控矿机制的不同与其它伸展作用形成的断裂构造相区别。     

Bioaccumulation, depuration and biotransformation of 4,4'-dibromodiphenyl ether in crucian carp (Carassius auratus)

Polybrominated diphenyl ethers (PBDEs) are extensively used as a class of flame retardants and have become ubiquitous environmental pollutants. Significant biotransformation of some PBDEs via reductive debromination has been observed. However, little is known about the fate of lower brominated BDEs in fish. In this study, the tissue distribution, excretion, depuration and biotransformation of 4,4′-dibromodiphenyl ether (BDE 15) were investigated in crucian carp (Carassius auratus) which were exposed to spiked water solution at different concentrations for 50 d, followed by a 14-d depuration period. Bioaccumulation parameters were calculated and the results showed that BDE 15 was mainly concentrated in the gill and liver. In particular, five biotransformation products of BDE 15 in carp were identified using GC-MS/MS. Besides two debrominated metabolites, three of the metabolites were mono-OH-BDE 15, diOH-BDE 15 and bromophenol. Our results unequivocally suggested that BDE 15 oxidation did occur via the formation of hydroxylated (OH-) metabolites in crucian carp exposed in vivo. These findings will be useful for determination of the metabolic pathways of PBDEs in freshwater fish, especially about their oxidation metabolism.     

The kinetic stability of colloid-associated plutonium: settling characteristics and species transformation

The colloid-associated plutonium-239, as the dominant species of Pu in natural environment, was formed through sorption of Pu onto in situ colloids. In case of chemical perturbations present in pore water, the fate and transport of Pu would be therefore impacted by changes in sorption affinity of Pu for the colloid surfaces. The present study reveals that colloidal ²³⁹Pu exhibited the kinetic stability in two respects. First, in situ colloids isolated from the vadose zone sediments at Lop Nor, when in contact with solutions of high ion concentrations or low pH, were significantly aggregated and then exhibited fast settling. Kinetics settling characteristics were described by the parameters, including settling index and characteristic time. Second, Pu dissociation from colloid surfaces occurred immediately after the introduction of Na⁺. However, the dissolved species was still unstable and had the potential for re-association with the fraction of colloids that had not settled out from the suspensions due to small size and then remained in suspension. This implies that Pu sorption sites on initial colloids were changed to the sites of suspended colloids.     

Kinetics of hydrogen peroxide-sulfur (IV) reaction in atmospheric precipitation

The kinetics of the reaction of dissolved S(IV) with H2O2 was studied on 59 precipitation samples collected in Southwestern China, during the period of June 1988 to October 1989, from which the oxidation rates of the reaction were measured. The extent of reaction was followed by continuous amperometric measurement of the concentrations of the reagents. The two systems (i. e. rainwater and purified water) have been studied with the same methodology under identical reaction conditions (e. g. reagent concentrations, ionic strength and temperature). The kinetics was studied in no buffer solutions. The effect of formaldehyde on the reaction has also been studied, including kinetic studies in laboratory and model calculations, and it is indicated that formaldehyde with typical atmospheric concentration exerts no influence on the reaction of dissolved S(IV) with H2O2. In addition, the activation energy of the reaction was also measured in purified water as reaction medium for temperature range 0-50℃ at pH 4.0     

液货危险品码头的安全与防治污染管理对策

液货（液体化工）危险品码头的安全与污染防治管理水平直接关系到港口、码头、水域和周围环境的安全。本文结合日照港的实际，对日照港口安全管理状况调查和分析，找出了港口安全管理存在的主要问题是安全管理机构、法规、人员等方面存在缺陷，提出对该类码头的安全管理与污染防治对策，从而为港口安全有效管理提供决策依据。