为分析农田土壤中重金属的来源,在研究了受体模型和主成分分析模型基础上,运用矩阵分解和插值方法分析土壤中重金属含量及污染来源.通过实验仿真得到农田重金属含量及空间分布特征,经分析发现,受人为因素影响,重金属含量有明显变化.仿真结果表明:所提方法能较好地解决农田土壤重金属含量及污染源确定问题.

地市是"三线一单"编制与实施的主体,做好地市级"三线一单"编制与应用工作是建立区域生态环境分区管控体系的重要途径.研究结合省级成果编制经验,从省市联动、"一张图"统筹及管控要求落地等方面,提炼地市"三线一单"编制的工作要求,以衡水市为例,完善了地市"三线一单"基础分析、要素分区管控、单元划定与清单编制等技术方法,探索"三线一单"在规划支撑、园区管理和污染物总量管控等方面的成果应用,以期为其他地市"三线一单"编制和应用提供实践经验.

The emission characteristics of VOCs from three typical rubber manufacture industries were studied by GC-MS/FID. Maximum incremental reactivity(MIR) and fractional aerosol coefficient(FAC) were employed to evaluate the ozone formation potential(OFP) and secondary organic aerosol(SOA) formation potential. The results show that the VOC types emitted from the manufacturing of rubber products mainly include alkanes, ketones, aldehydes, alcohols, and benzene series. For traditional rubber products manufactured through rubber mixing and vulcanization, the main pollutants are ketones and alcohols, whereas for production processes involving gluing and painting, the main pollutants belong to the benzene series. In terms of ozone impact, the traditional processes contribute to ozone formation mainly through oxygenated hydrocarbons. In industries that utilize adhesives and paints, the extensive use of these organic solvents lead to a significantly higher contribution of the benzene series than other VOC species to ozone formation; the benzene series account for 82.9% of the total contribution. In terms of SOA impact, the benzene series are the main contributor to SOA, whereas the contribution of VOCs from traditional processes is small; hence, SOA primarily originates from the gluing and painting processes. Therefore, in traditional production of rubber products through rubber mixing and vulcanization, the emission of oxygenated hydrocarbons should be preferentially controlled, whereas for rubber industries utilizing gluing and painting processes, the emission of benzene series should be preferentially controlled.

为制备出洁净无毒的木质-橡胶环保复合材料,本文通过相关检测方法对影响木质—橡胶环保复合材料甲醛释放量的主要因子进行了检测,并对检测结果进行了详细的分析.结果表明,木刨花与橡胶颗粒质量比和脲醛胶对该复合材料甲醛释放量影响最大.

工程橡胶行业在进行炼胶生产时,会随着反应的进行释放出很多有毒气体,主要包括硫化氢和二氧化硫等等,长时间的排放对大气造成了非常严重的污染.所以说炼胶废气的治理工作已经到了迫在眉睫的地步.随着我国对于环保意识的日渐提高,很多治理废气的技术如雨后春笋般发展起来.

随着社会的高速发展,环境破坏也越来越严重.特别是衡水湖的水质恶化,本文作者结合多年的工作经验介绍衡水湖的基本情况、衡水湖富营养化原因及其治理措施.

In this paper,in order to achieve the objective of sustainable development in the region,the regional distribution of the total emissions of pollutants conducted a preliminary exploration,through the analysis of the various factors affecting them and,ultimately,for a particular formulation of regional development planning,the realization of sustainable development,provides a better distribution of the total emissions of pollutants.