地震勘探作业过程中环境保护措施分析

文章对目前国内地震勘探作业过程中的环境保护措施现状进行了分析,并对照部分国外石油公司的作法和IAGC及国家《清洁生产促进法》的要求寻找差距,再结合国内的实际情况提出了对地震勘探作业环境保护措施的建议,同时为国内物探行业开拓国际市场,树立绿色施工、文明施工、清洁施工的良好企业形象提供了有益的参考。     

在地震勘探作业中实施"绿色勘探"

根据国家和中国石油天然气集团公司有关清洁发展、环境保护的要求,结合地震勘探生产作业的特点和实际情况,提出在地震勘探作业中实施绿色勘探需要开展的主要工作,以及完成这些工作所要具备的必要条件.     

伏立康唑废水处理工艺探讨

在分析伏立康唑废水的来源及特点的基础上,介绍了伏立康唑废水处理工艺：焚烧处理方法、物化＋生化处理方法以及多种方法的综合处理等。经过应用及其处理效果分析比较,确定了处理该废水的最佳方案,即采用“预处理（催化氧化、电解）＋厌氧＋好氧＋过滤”的多种方法综合处理工艺,可使出水指标达到国家排放标准。     

欠发达地区山地小城市人居环境建设初探——以巴中市南江县为例

为寻找适合欠发达地区山地小城市人居环境发展的途径。文章通过对南江县人居环境状况进行问卷调查,分析其人居环境的特点和发展中存在的问题,在综合比较后加以分析总结,从而找到了一些促进此类城市人居环境发展的因素,具有一定的代表性意义。     

南京市表层土壤重金属污染特征及污染来源

以南京市表层土壤为对象,研究了南京市不同功能区土壤重金属的污染特征,并采用主成分分析法对南京市土壤重金属的主要可能来源予以判别。结果表明：重金属污染主要在工业区和交通繁忙区相对较重,而居民区和公园区的重金属污染相对较轻。从本次调查的土壤重金属污染水平的对应分析结果来看,重金属Pb的富集系数为3.21,表现为强富集;而Cu、Zn的富集系数分别为：1.72和1.80,表现为一定的弱富集;Cr和N i的富集系数分别为0.99和1.00表现相对贫化,基本与背景值较接近.对南京市土壤重金属主成分分析结果表明：南京市市区的土壤重金属污染主要来自于交通排放和工业释放;同时,也应该看到对于城市公园和居民住宅区,城市垃圾、市政工程等也是目前环境污染的一个重要原因。     

Preparation methods and thermal stability of Ba-Mn-Ce oxide catalyst for NOx-assisted soot oxidation

Manganese oxide-loaded and -doped ceria as well as the corresponding barium-modified oxide catalysts were prepared for soot oxidation in the presence of NOx, and were characterized by using X-ray diffraction, Brunauer-Emmett-Teller and NO temperatureprogrammed oxidation measurements. The activity of catalyst depended strongly on the NO2 production capacity, and the importance of surface nitrates was weakened without heat transfer limitations. The formation of perovskite-type oxides after the high-temperature calcination caused the loss of NOx storage capacity for the Ba-modified catalysts, but did not seem to affect the NO oxidation activity obviously. The addition of barium did not prevent the phase separation of MnOx-CeO2 solid solutions, whereas it inhibited the sintering of oxide crystallites effectively. This, as well as the relatively high surface area, resulted in a small increase in soot oxidation temperature for the thermally aged Ba/Mn-Ce catalyst.     

Computing payment for ecosystem services in watersheds: An analysis of the Middle Route Project of South-to-North Water Diversion in China

An improved watershed criteria model was developed in light of research on payment for ecosystem services outflows theory.     

大气挥发性有机化合物环境基准研究进展与展望

挥发性有机化合物(VOCs)中的许多物种对人体具有危害性,同时,VOCs对大气环境产生着重要的影响。目前我国部分区域大气VOCs污染已经十分严重,控制大气VOCs污染对于改善环境空气质量,保护人体健康具有重要意义。国际上许多国家或国际组织制定了大气VOCs环境基准或者发布了大气VOCs环境基准指导值,这对于加强VOCs污染控制及环境管理可以起到重要作用。我国尚未制定大气VOCs环境基准,亟待开展系统的研究工作。在综述国际大气VOCs环境基准研究进展,介绍当前我国大气VOCs环境基准研究情况的基础上,分析了我国大气VOCs环境基准的研究需求,并对今后的系统研究提出了建议。     

Effect of water vapor on NH3-NO/NO2 SCR performance of fresh and aged MnOx-NbOx-CeO2 catalysts

A MnOx–NbOx–CeO2 catalyst for low temperature selective catalytic reduction(SCR) of NOx with NH3 was prepared by a sol–gel method, and characterized by NH3–NO/NO2 SCR catalytic activity, NO/NH3 oxidation activity, NOx/NH3 TPD, XRD, BET, H2-TPR and in-situ Diffuse Reflectance Infrared Fourier Transform Spectroscopy(DRIFTS). The results indicate that the Mn Ox–Nb Ox–CeO2 catalyst shows excellent low temperature NH3-SCR activity in the temperature range of 150–300℃. Water vapor inhibits the low temperature activity of the catalyst in standard SCR due to the inhibition of NOx adsorption. As the NO2 content increases in the feed, water vapor does not affect the activity in NO2 SCR. Meanwhile, water vapor significantly enhances the N2 selectivity of the fresh and the aged catalysts due to its inhibition of the decomposition of NH4NO3 into N2O.