Spontaneous abortion after transcervical chorionic villus sampling: A case report

A case of spontaneous abortion after transcervical CVS is presented. Despite no evidence of bacteria in the vagina and cervix prior to sampling and the prophylactic use of Metronidazole, pathological evidence of chorioamnionitis was found. The implications of this are discussed.     

Stability analysis of alkaline nitrobenzene-containing wastewater by a catalyzed Fe-Cu treatment process

Iron and copper bimetallic system (catalyzed Fe-Cu process) is a promising technology for alkaline nitrobenzene-containing wastewater treatment. However, little is currently known about the changes of treatment efficiency with time going. This research investigated the long-term performance of the catalyzed Fe-Cu process to reduce nitrobenzene (NB) in alkaline wastewater. In addition, the changes of the metal surfaces morphologies and matters before and after the reaction were analyzed by scanning electron microscopy (SEM) in conjunction with energy-dispersion spectroscopy (EDS) and X-ray diffraction spectroscopy (XRD). The results showed that the surface properties of copper almost remained unchanged after weeks of operation, which spelled its strong chemical stability and resistance to poisoning. Moreover, the results indicated that there were two reasons for the treatment efficiency decreasing with time. One was the gradual iron element consumption due to corrosion. The other was iron reactivity weakened due to the precipitates accumulation on the surfaces that were mainly Fe₃O₄ and FeCO. __________ Translated from Environmental Pollution & Control, 2006, 28(10): 783–785 [译自: 环境污染与防治]     

上海市闵行区环保设施专业化运营效应研究

环保设施专业化运营是深化环境管理体制与制度创新，促进环保污染治理设施运营管理的社会化、市场化、专业化、规范化，建立企业污染物达标排放的长效管理机制。以上海闵行区环保设施专业化运营探索工作为实例，介绍了闵行区实施专业化运营的基础、实践内容及效果，分析了环保设施专业化运营的意义、效益和难点，为推广环保设施专业化运营和发展环保产业提供指导意义。     

天津市环境空气SO2污染现状及分析

天津环境空气SO2的年均浓度始终超过国家二级标准。年均浓度超标主要因为采暖期SO2浓度过高所至，采暖期SO2平均浓度是非采暖期浓度的3倍左右；在2002--2005年的三个采暖期里，SO2污染逐年加重，导致了年均SO2浓度的逐年升高。天津SO2污染与采暖期增多的低烟囱排放、不利的气象条件有关，也与流动源的隐性排放、能源利用效率低下有关。结合天津经济发展速度、每年煤耗增量、现有环境治理手段来做预测，空气SO2浓度要在未来几年内达到国家二级标准仍是不可能的。     

Enhanced activity of ZnS(111) by N/Cu co-doping:Accelerated degradation of organic pollutants under visible light

High-efficiency photocatalysts are of great significance for the application of photocatalytic technology in water treatment.In this study,N/Cu co-doped ZnS nanosphere photocatalys(N/Cu-ZnS) is synthesized by a hydrothermal method for the first time.After doping,the tex ture of nanosphere becomes loose,the nanometer diameter is reduced,making the specific surface area of catalyst increased from 34.73 to 101.59 m²/g.The characterization results show that more ZnS (111) crystal planes a...     

我国污水资源化存在问题及其对策

我国是缺水国家,水资源短缺严重制约着发展前景,水污染问题又使缺水状况更加突出.实施污水资源化战略可提高水的利用率,缓解部分水资源紧张问题.     

南通市一次连续空气污染过程的气象特征分析

文章对2005年11月22日至12月2日南通市及邻近地区出现的大范围、长时间连续空气污染过程的天气形势和主要气象要素进行了分析。结果表明：大型稳定性高压伴随而来的稳定层结和小风速，导致大气污染物难于扩散，是这次空气污染过程的主要原因；弱冷空气无法改变大气稳定层结，难于结束空气污染状态；随着强冷空气到来，大气环流形势改变，空气质量改善。     

抚顺市空气可吸入颗粒物特征的研究

于2002年1～7月份在抚顺市区四个点位采集了环境空气中的可吸入颗粒物样品，经分析后获得了可吸入颗粒物组分的时间分布和空间分布特征，即采暖期PM10样品中有机碳（OC）、元素碳（EC）的绝对含量和相对含量均高于非采暖期，工业区PM10样品中的Fe、Zn、Pb的绝对含量和相对含量均明显高于其它点位，反映了其工业区的特点。     

宜宾市水资源保护与可持续发展问题的探讨

本文从近几年来宜宾市工业及生活废水等排放情况及水环境质量的监测资料，阐述了我市流域水污染状况与可持续发展面临的主要问题，提出了水资源保护对策，以促进社会经济可持续发展。     

五日生化需氧量(BOD5)测定方法探讨

本文针对GB／T7488-1987《水质五日生化需氧量(BOD5)稀释与接种法》中BOD5的测定和计算时接种稀释水的空白扣除方法，提出了直接测接种液的BOD5值，按接种液的比例在水样中进行扣除的方法，提高了BOD5值的准确性。更能反应BOD5的真实性。