环境侵权诉讼中原告举证责任的界限

法律规定,在环境污染侵权诉讼中,原告证明损害事实,被告证明排污行为与损害事实之间不存在因果关系,看似原告的举证责任已经大大减轻。但是,在司法实践中．却难以拿捏证明“损害事实”与证明“因果关系”之间的“度”．两者的界限并不像法条文本上那么明确．要求原告举出确凿的证据证明前者,在本质上与要求证明后者并无二致。为此,需要降低原告举证责任的标准,并引入原告举证的”可接受性”标准与法官自由心证的原则,以体现公平正义。     

石油烃类蒸气入侵研究进展

蒸气入侵（VI）是最有可能导致人体健康风险的暴露途径,石油烃类蒸气入侵（PVI）是污染物为挥发性石油烃（PHC）时的一种特定VI类型,与其他类型VI的最重要区别在于PHC在包气带传输过程中会因好氧生物降解而迅速衰减,从而显著降低PVI风险发生的可能性。文章梳理和总结了PVI的概念、机理、筛选与调查、模型、风险评估与管控等方面的相关研究成果并进行了展望,以期为PVI研究以及PVI场地调查、风险评估与管控等实践工作提供借鉴和参考。     

絮体分形结构形成机制探讨

基于统计力学和无标度网络框架分析了絮凝过程,并从物理角度导出了絮体的分形结构,探讨了分形维数与外界控制条件的关系.在此基础之上,根据能量守恒对模型进行了理论计算,发现在湍流条件或外界能量交换强烈的情况下,分形维数较高;反之,若在层流条件或能量交换较弱的条件下,则分形维数较低.将理论计算结果与实验结果进行比较,二者较为一致.     

Penetration analysis of elements and bioleaching treatment of spent refractory for recycling

Acidithiobacillus ferrooxidans ATCC23270 and Acidithiobacillus thiooxidans TM-32 were used for bioleaching of spent refractories of aluminium and copper melting furnaces for their recycling.Firstly,penetration of elements into aluminium melting furnace refractory was investigated and it was found that up to 7 cm from surface was contaminated.Comparison on leaching efficiency by the strains ATCC23270 and TM-32 found that the strain ATCC23270 could treat larger amount of the refractories than the strain TM-32 could do.In the experiment of bioleaching of spent refractory aluminium melting furnace by the strain ATCC23270,high leaching efficiency were obtained on Al,Si,and Ca,and extremely low leaching performance was,however,shown on the rest of elements i.e.,Na,Mn,and Zn.Under the strain TM-32 use,relatively high leaching performance was recognized on Al,Si,Ca,Na,Mn,and Zn.In the experiment of bioleaching for spent refractory copper melting furnace,almost the same leaching trends were shown on Cu,Zn,Al,and Si under the strains ACTT23270 and TM-32 uses.     

工业热水锅炉热功率测试不确定度分析

工业热水锅炉热功率的测量方法依据(GB10180-1988《工业锅炉热工试验规范》),测试原理是利用在单位时间里测量吸收了热能的循环水的流量．从而求得锅炉热功率。由于使用涡轮流量计测量的精度高、误差小,本涉及的方法就是使用涡轮流量计,每隔15分钟记录一次,累计过程4小时．最后测定热功率。     

新型高效全自动中水过滤塔

介绍了一种新型高效中水处理设备——全自动中水过滤塔,它在中水过滤材料、清污方式、消毒手段以及自动控制和易用性等方面有独特的创新性。