Evaluation of in situ catalysed hydrogen peroxide propagation (CHP) for phenanthrene and fluoranthene removals from soil and its associated impacts on soil functionality

Extensive contamination of soils by highly recalcitrant contaminants such as polycyclic aromatic hydrocarbons (PAHs) is an environmental problem arising from rapid industrialisation. This work focusses on the remediation of soil contaminated with 3- and 4-aromatic ring PAHs (phenanthrene (PHE) and fluoranthene (FLUT)) through catalysed hydrogen peroxide propagation (CHP). In the present work, the operating parameters of the CHP treatment in packed soil column was optimised with central composite design (H₂O₂/soil 0.081, Fe³⁺/soil 0.024, sodium pyrophosphate (SP)/soil 0.024, pH of SP solution 7.73). The effect of contaminant aging on PAH removals was also investigated. Remarkable oxidative PAH removals were observed for the short aging and extended aging period (up to 86.73 and 70.61 % for PHE and FLUT, respectively). The impacts of CHP on soil biological, chemical and physical properties were studied for both spiked and aged soils. Overall, the soil functionality analyses after the proposed operating condition demonstrated that the values for soil respiration, electrical conductivity, pH and iron precipitation fell within acceptable limits, indicating the compatibility of the CHP process with land restoration.     

Levels and distribution of heavy metals in atmospheric particular matters over the northern South China Sea

Oceans play a significant role in the cycling of trace metals and persistent organic pollutants. In this study, aerosol samples covering the whole northern South China Sea (SCS) were collected in 2005 and 2007, respectively, for analysis of trace metals and major elements. The levels of trace metals detected ranged from 0.514 to 119 ng/m³ in 2005 and from 0.130 to 24.2 ng/m³ in 2007, respectively. Cu, Zn, and Pb were the three predominant metals with high enrichment factors (>10), indicating the strong anthropogenic inputs. The trace metals over SCS were comparable to the values in suburban and background sites of South China, but generally higher than those over other seas and oceans. Considering the fact that they were influenced by their proximity to source regions and air mass origins, the elevated metals in 2005 were probably attributed to the strong wind and long-range atmospheric transport driven by Asian monsoon.     

垃圾焚烧烟气中二噁英的危害及治理

分析了垃圾焚烧过程中产生二英的原因及危害 ,给出了相应的整治措施     

合理回收和利用蒸汽凝结水

洛阳石化总厂原有蒸汽凝结水回收设施由于设施和管理等方面存在缺陷，不能有效地运行，通过对其进行有针对性的改进，使大量高品位优质凝结水得到有效回收和利用，产生了巨大的经济效益。     

一体化氧化沟技术应用实例

安阳市豆腐营污水集中控制示范工程是我国第一批环保示范工程项目之一，采用水解－接触氧化－一体化氧化沟工艺，其中，一体化氧化沟技术为我国首次工程应用，并取得了成功。该工程于１９９５年底通过了国环保局组织的验收。本文对此工程设计及运行参数进行了详细介绍。     

三亚市区城市污水海洋处置研究

三亚市城市污水原计划二级污水处理厂处理后排入三亚河和榆林内港。经过反复论证，在详细分析计算三亚河、榆林内港水环境容量及自净能力的基础上，研究比较了不同的排放水域、排放方式、污水处理厂数目和处理程度等２２ 个方案后推荐采用污水海洋处置，岸上一级处理（ 预留场地以后再提高处理程度） 后离岸深水排放。现污水海洋处置工程已完成可行性研究和环境影响评价，并正在分阶段设计施工中     

啤酒废水处理工程的运行与维护

废水处理工程的运行和维护 ,包括技术管理和人员管理两大方面 ,本文介绍使废水处理工程的出水能可靠符合国家排放要求的各种运行管理技术。     

泸州市区域环境噪声监测优化布点

本文利用数理统计中有关数学工具进行监测布点的优化工作。把泸州市区域环境噪声普查的294个监测点位优化为67个。经验证,该优化布点方法合理、科学。     

浅释环保部门财会监督与审计监督

阐述了环保部门财会监督与审计监督的关系,探讨了二者的不同特点作用和具体内容,从而让环保部门更加重视财会监督的基础性作用和审计监督的法律权威性。     

一体式膜生物反应器处理生活污水的中试研究

采用中试规模（1.8m^3／d）的缺氧-好氧膜生物反应器（A／OMBR）对城市污水处理回用进行了试验研究。试验结果表明，该工艺处理效果优良，系统对COD、氨氮、浊度、总氮、总磷去除率较高，COD、氨氮出水浓度分别为7～39 mg/L、0～1.31mg／L。出水水质优于城市杂用水水质标准（GB／T18920-2002）。