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Jakub Gebicki Michael Modigell Matthias Schumacher Job van der Burg Eugenè Roebroeck 《Journal of Cleaner Production》2010
In the contribution at hand two main concepts of photobioreactors are considered: the flat-panel reactor and the tubular reactor. Both reactors are investigated under outdoor conditions in Germany in the summer time for their applicability for H2 production by means of purple non-sulphur bacteria Rhodobacter capsulatus. The experiments are performed as fed batch. The performance of a photobioreactor is evaluated in terms of H2 productivity per IRS (illuminated reactor surface). It is demonstrated that both reactors could be operated stable for several weeks with comparable H2 productivities. The mean hydrogen productivity for the panel and the tubular reactor is 3690 ml H2/(mIRS2 d) and 3350 ml H2/(mIRS2 d) respectively. While approximately 8 m2 of the illuminated reactor surface of the panel reactor can be installed on 1 m2 of ground space, the relation of the illuminated reactor surface to the ground area for the tubular reactor is approximately 1–1. 相似文献
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Vives I Canuti E Castro-Jiménez J Christoph EH Eisenreich SJ Hanke G Huber T Mariani G Mueller A Skejo H Umlauf G Wollgast J 《Journal of environmental monitoring : JEM》2007,9(6):589-598
Samples of air (gas and particulate phases), bulk deposition, aquatic settling material and sediments were collected in Lake Maggiore (LM) in order to determine their content of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs). Air (gas and particulate phases) concentrations were 0.5 pg m(-3), 80 pg m(-3), 13 pg m(-3) and 106 pg m(-3) for SigmaPCDD/Fs, SigmaPCBs, Sigma dioxin-like PCBs (DL-PCBs) and SigmaPBDEs, respectively. Deposition fluxes ranged from 0.7 ng m(-2) d(-1) for SigmaPCDD/Fs to 32 ng m(-2) d(-1) for SigmaPCBs. Aquatic settling material presented concentrations of 0.4 ng g(-1) dry weight (dw) for SigmaPCDD/Fs, 13 ng g(-1) dw for SigmaPCB, 3.4 ng g(-1) dw for SigmaDL-PCBs and 5.7 ng g(-1) dw for SigmaPBDEs. Mean sediment concentrations were 0.4 ng g(-1) dw for SigmaPCDD/Fs, 11 ng g(-1) dw for SigmaPCB, 3 ng g(-1) dw for SigmaDL-PCBs and 5.1 ng g(-1) dw for SigmaPBDEs. Similar PCDD/F and DL-PCB congener patterns in all the environmental compartments of LM point to an important, if not dominant, contribution of atmospheric deposition as source of these pollutants into LM. In contrast, PBDE congener distribution was not similar in the different environmental compartments. BDE 47 dominated air and settling material, while BDE 209 was the predominant congener in the bulk atmospheric deposition. Moreover, sediments showed two distinct PBDE congener profiles. Lower PBDE concentrated sediments were dominated by congeners 47 and 99, while BDE 209 dominated in higher PBDE concentrated samples. This suggests the influence of local sources as well as atmospheric input of PBDEs into LM. 相似文献
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Umlauf Gunther Christoph Eugen H. Eisenreich Steven J. Mariani Giulio Paradiž Bostjan Vives Ingrid 《Environmental science and pollution research international》2010,17(2):462-469
Background, aim, and scope
The aim of the study was to identify the impact of polychlorinated dibenzo-p-dioxin and furan (PCDD/F) emission sources on ambient air concentrations in the Malopolska Region, southern Poland. Three sites were selected: the city center of Krakow (Aleje), an industrial area (Nova Huta), and a rural site (Zakopane). In order to investigate the annual variations of PCDD/F sources, summer and winter time samples were taken. 相似文献30.
Eugen Mitrică Bianca Mitrică Andrei Stănculescu 《Environmental and Ecological Statistics》2014,21(1):83-93
The paper is focused on the cost of travel method and specific issues involved by the use of this method for monetization of benefits provided by nature preservation investment projects. Usually, nature preservation investment projects are non revenue generator projects and consequently the monetization of benefits provided is essential in the process of analysis and valuation of these projects, because benefits are the only positive effects able to counterbalance the investment costs. Therefore, the main interest and particularity of the cost-benefit analysis of nature preservation investment projects consists in identification and monetization of the benefits. In the following paper, the method of zonal travel cost is used for indicative valuation of the direct benefits of an investment project for nature preservation, in Harghita County of Romania, as an opportunity and pre-feasibility study completed before making the initial investment decision. 相似文献