空气湿度对低浓度有机蒸气在活性炭上吸附平衡的影响

采用吸附柱穿透曲线法测定了30℃不同相对湿度（RH）下4种低浓度有机蒸气（VOC）在活性炭上的等温吸附量，结果表明，水蒸汽对VOC吸附平衡的抑制作用。随着RH的增大，VOC浓度的降低而增大，且随着VOC分子极性的增强则有所增大；VOC水蒸汽吸了平衡的抑制作用，随着VOC分子极性的增强是有所减弱，提出一个基于竞争吸附机理的olanyi-Dubi-min方程，解释空气湿度对低浓度VOC在活性炭吸附平衡的影响。     

土壤与沉积物中水溶性有机物释放动力学研究

模拟研究了沉积物与草甸沼泽土中水溶性天然有机物从固相向水相释放的动力学过程，探讨了流速、温度和ｐＨ条件对土壤物中水溶性有机物释放速度的影响。研究结果表明，上述过程可以用滞膜模型（单膜）加以描述，释放为典型的一级动力学过程，且草甸沼泽土中水溶性有机物的释放较沉积物快。     

Carbon Budget Implications of the Transition from Natural to Managed Disturbance Regimes in Forest Landscapes

Land-use change from an unmanaged to a managed forested landscape in northern forests is associated with a reduction of the area annually affected by natural disturbances (wildfires and forest insects) and the introduction of harvesting as a new disturbance. This study examined the impacts of changes in the disturbance regime-the frequency and type of disturbance-on landscape-level carbon (C) content and fluxes. The Carbon Budget Model of the Canadian Forest Sector was used to assess these impacts in six representative landscapes (100,000 ha each) with a range of disturbance regimes that are characteristic of conditions in coastal British Columbia, the interior of British Columbia, and the eastern boreal forest in Canada. The model was used to simulate ecosystem C fluxes during a period of natural disturbances, a 50-year transition period during which harvesting replaced natural disturbances, followed by 150 years of harvesting. The initial landscape-level biomass C content under natural disturbance regimes in the six example landscapes was 22 to 75% of their potential maximum content which is often used as the reference or baseline case. After 200 years of forest management, the C stored in the landscape plus the C retained in forest products manufactured from harvested biomass was between 58 and 101% of the landscape C content prior to the onset of harvesting. Landscape-level ecosystem C content was found to be affected by changes in the disturbance frequency, the age-dependence of the disturbance probabilities, and the disturbance-specific impacts on ecosystem C content. The results indicate that using the potential maximum C content of a landscape as the baseline always overestimates the actual C release due to land use change. A more meaningful procedure would be to assess the actual differences in landscape-level C content between the natural and the managed disturbance regime.     

稀土作业者外周血淋巴细胞姊妹染色单体互换的观察

本文报告了 5 0例稀土作业工人外周血淋巴细胞姊妹染色单体互换 (SCE)的观察结果 ,其 SCE频率为 5 .49± 1.2 1(SCE/ cell,X SE) ,与 2 0例对照组相比 ,差异显莉 (P<0 .0 1)。随工令的延长 ,SCE频率为增高的趋势 ,但各工令组之间 ,经统计学处理 ,差异不显著 (P<0 .0 5 )。男工 SCE率高于女工 ,这可能与男工吸烟人数多于女工有前。我们认为 :SCE可作为稀土作业人员早期危害观察指标     

国际环境法中环境信息交流制度

环境信息国际交流制度，已成为国际环境法的一项基本法律制度，其内容涉及各国和国际组织在这项交流中的地位，作用及机构，权利和义务，交流范围和形式，这项制度对有效保护人类环境发挥了多方面积极作用，在尊重各国主权，合作取得和共同享有，支持发展中国家参与交流原则基础上，这项制度将日益丰富，多样，完善。     

ClO2氧化-活性炭吸附法处理染色废水的试验研究

用ClO2氧化与活性炭吸附相结合的方法处理染色废水，与单独用ClO2氧化或活性炭吸附处理相比，CODcr去除率和脱色率均有较大提高。     

旅游踩踏对土壤微生物生物量碳、氮、磷的影响

为了探明旅游活动对张家界国家森林公园土壤微生物活性及多样性的影响,保护土壤生态平衡及合理开发自然保护区提供理论依据,进行了旅游踩踏对土壤微生物生物量碳、氮、磷的影响研究.结果表明,在所设的3个试验区中,0～5cm土壤层的微生物生物量碳、磷受到旅游踩踏的影响最严重,5～15cm土壤层的微生物生物量碳、磷受到旅游踩踏的影响较严重,而15～25cm土壤层的微生物生物量碳、磷受到旅游踩踏的影响最轻,旅游踩踏对所设3个试验区中3个层次土壤的微生物生物量碳、磷的影响均达到了显著水平(p＜0.05).从旅游踩踏对3个土壤层的微生物生物量氮的影响程度来看,0～5cm土壤层的微生物生物量氮受到的影响最严重,5～15cm土壤层的微生物生物量氮受到的影响较严重,而15～25cm土壤层的微生物生物量氮受到的影响最轻,背景区与缓冲区15～25cm土壤层的微生物生物量氮差异没有达到显著水平.说明张家界国家森林公园土壤微生物遭到了旅游踩踏的破坏,抵御外界干扰的能力已受到了旅游踩踏的破坏.     

炼油污水回用方案初探

针对污水处理场改造后的水质情况，结合现有闲置设备的状况，提出一套既符合现场实际又有针对性的污水回用处理方案。     

Solid phase extraction of methomyl and thiodicarb from environmental water with an activated carbon cartridge and their determination by HPLC

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载银活性碳纤维对大肠杆菌吸附作用的研究

以大肠杆菌（Ｅｓｃｈｅｒｉｃｈｉａｃｏｌｉ）为对象，通过细菌吸附实验研究了载银活性碳纤维（ＡＣＦ（Ａｇ））对大肠杆菌的吸附特性．借助扫描电子显微镜（ＳＥＭ）进行细菌分布形态的观察和细菌数量的计算．结果表明，大肠杆菌易分布于ＡＣＦ（Ａｇ）表面的沟槽处；ＡＣＦ（Ａｇ）吸附的细菌数量随银含量、比表面积的增加而增大．此外，细菌吸附量还与ＡＣＦ（Ａｇ）表面银颗粒的大小有关．对吸附细菌的动力学亦进行了研究．