污染物

Punishing the enterprises who don't deal with tile pollutant and reducing their expected payoff to make sure the environment won't be severely polluted.

要确保环境不被严重污染，就必须对不处理污染物的企业进行严惩，降低不处理污染物的预期收益。

Statistical and stochastic analysis of h ydraulic conductivity and particle size in a fluvial sand［J］.

由于污染物的宏观弥散系数与污染物浓度的方差是所研究区域的土壤水力特性参数的统计特征值的函数［12］。

PCBs at the beginning of the land fill were mainly composed of the 3-Cl and 5-Cl compounds. In the late of the land fill, 2-Cl compounds increased significantly. The main factor affecting the PAHs, PCBs contents were microbial degradation and transformation. Analysis of the pollutants source s indicated that PAHs in sludge were mainly derived from the waste water of refinery, coking plant, gasworks, smelt plant and pitch plant.

填埋初期污泥中PCBs主要以3-Cl和5-Cl化合物为主，填埋后期，2-Cl化合物大大增加，占总的PCBs含量的大部分影响PAHs、PCBs含量变化的主要因素是生物对PAHS的降解转化根据污泥中各污染物的含量对污染物进行源解析表明，污泥中PAHs主要来源于炼油厂、炼焦厂、煤气厂、冶炼厂和沥青厂等排放的废水。

Alkane, such as Octadecane, Heptacosane, Nonacosane, Hentriacontane and Tetratriacontane, accounted for more than 75 % of the total removal of petroleum.

经过180d修复，结果表明，土壤石油污染物去除率达70.6％，去除速率达0.15g· kg^-1·d^-1，与自然条件相比，石油污染物半袁期由929d减少为103d。

Safety and quality for agricultural product safety demand for non-environmental pollution fruit (GB 18406.2-2001) prescribes eight heavy metals and harmful substances in apple, such as arsenic, hydrargyrum, lead, cadmium, chrome, fluorine, nitrite, nitrate and also the residue limit of 22 pesticides.

另外，发布实施的《食品中污染物限量》(GB 2762-2005)规定了苹果中铅、镉、汞、无机砷、铬、硒、氟和稀土等8种污染物的限量标准[1]；《食品中农药最大残留限量》(GB 2763-2005)规定了苹果中49种农药的残留限量[2]；《农产品安全质量无公害水果安全要求》(GB 18406.2-2001)规定了苹果中砷、汞、铅、镉、铬、氟、亚硝酸盐、硝酸盐等8种重金属和有害物质以及22种农药的残留限量[3]。

Environmental issue has caused widely public concern. In this thesis, the mechanism of calcite cluster structure absorbing environmental infectant has been investigated using quantum chemistry calculation. Using B3LYP calculation method and taking 6-311++G (3df,2pd) basis set in our Gaussian calculations, the results show that the calcite cluster structure can absorb environmental infectant.

在本次研究中，采用了量子化学计算中的B3LYP方法以及6-311++G(3df，2pd)基组进行理论计算，其结果能很好的反映方解石表面分子簇结构吸附环境污染物的情况，为阐明方解石表面分子簇结构吸附环境污染物的机理提供了理论基础。

The pollution caused by atmospheric particulate PM2.5 is one of the important factors affecting urban visibility, research on the vertical distributive characters of PM2.5 at the ground layer is benefit for the understanding the formation mechanism of the primary pollutants, which will provide a new scientific basis for the comprehensive pollution control. Experiments were carried out from 16, Aug of 2006 to 31, Aug of 2007 on the meteorological tower of 255 m height in Tianjin. The observation of PM2.5 mass concentration with the meteorological elements at three levels of 40 m, 120 in and 220 in are analyzed.

大气细颗粒物PM2.5是导致城市能见度降低的重要原因之一，研究低层大气细颗粒物的垂直分布特征，利于了解边界层内污染物的大气物理化学反应机制，能为大气污染综合治理决策提供新的科学数据。2006年8月16日－2007年8月31日期间以天津市255m气象塔为观测平台，分别在40m、120m和220立方公尺个不同高度进行大气污染物PM2.5质量浓度和气象要素的同步观测。

According to basic analytical methods of environmental quality standards for surface water in China(GB3838-2002),we used the 2002-2006 monitoring data to evaluate and characterize water quality condition of Lanzhou reach of Yellow river,based on the Nemerow index and variance analysis of the mean square deviation.

根据2002-2006年黄河兰州段水质监测数据，按照《地表水环境质量标准》GB3838-2002中Ⅲ类水质标准，确定污染物的污染程度，选用内梅罗水污染指数法，运用方差分析，对黄河兰州段水质现状进行评价分析，结果表明：(1)黄河兰州段水体的主要污染物是粪大肠菌群和总氮；(2)大量未经处理的生活污水排放是黄河兰州段的主要污染源；(3)针对黄河兰州段生活污水污染现状，提出源头治污思路。

This paper analyzes the origins of the indoor methanal and benzene and other pollutants,discusses the influence of these pollutants on the indoor air and the harmfulness of these pollutants on the human health,and briefly introduces some methods for treating indoor air pollution.

分析了室内甲醛、苯及其他污染物的来源，讨论了这些污染物对室内空气的影响及对人体健康的危害，概要介绍了室内空气污染治理的方法。

Due to the non-selective characteristics of oxidants, three aspects concerned for estimating ISCO oxidant dosage requirement for effective treatment of target contaminants must be considered: the stoichiometric amount of oxidant for destroying the contaminant, the oxidant demand to meet with the consumption by natural soil oxidizable matters and the amount resulting from oxidant self-decomposition. It should be noted that the oxidant consumed by the background organic and inorganic components of the soil aquifer matrix is known as soil oxidant demand of the treatment zone.

由於大多数氧化剂不具选择性，因此若欲使目标污染物达到良好的降解效率，必须考量目标污染物所需之氧化剂剂量、氧化剂本身自我降解量，以及与土壤中其他可氧化物质（oxidizable matter，OM）反应之消耗量，此三者综合才是真正现地应用所需之氧化剂总量，而用以克服土壤中非目标OM之氧化剂量称为土壤氧化剂需求量（soil oxidant demand，SOD）。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。