594 research outputs found
Modeling electrodialysis and a photochemical process for their integration in saline wastewater treatment.
Oxidation processes can be used to treat industrial wastewater containing non-biodegradable organic compounds. However, the presence of dissolved salts may inhibit or retard the treatment process. In this study, wastewater desalination by electrodialysis (ED) associated with an advanced oxidation process (photo-Fenton) was applied to an aqueous NaCl solution containing phenol. The influence of process variables on the demineralization factor was investigated for ED in pilot scale and a correlation was obtained between the phenol, salt and water fluxes with the driving force. The oxidation process was investigated in a laboratory batch reactor and a model based on artificial neural networks was developed by fitting the experimental data describing the reaction rate as a function of the input variables. With the experimental parameters of both processes, a dynamic model was developed for ED and a continuous model, using a plug flow reactor approach, for the oxidation process. Finally, the hybrid model simulation could validate different scenarios of the integrated system and can be used for process optimization
Homologació de rareses ornitològiques a Balears. Informe de 2009
Homologació de rareses ornitològiques a Balears. Informe de 2009. dinovè informe anual que presenta el Comitè de Rareses Ornitològiques del GOB. S’han homologat 31 registres, corresponents a les seguents espècies, de les quals destaca un re gistre homologat per primera vegada a les Balears, la gralla Corvus monedula. Altres cites són: negreta Melanitta nigra, rascletó Porzana parva, fuell de collar Charadrius morinellus, gavina atlàntica Larus argentatus, gavinot Larus marinus, cotoliu Lullula arborea, bosqueta pàl·lida Hippolais opaca, busqueret emmascarat Sylvia hortensis, ull de bou ibèric Phylloscopus ibericus, capsigrany roig Lanius collurio, gorrió d’ala blanca Montifringilla nivalis, pinsà trompeter Bucanetes githagineus, hortolà blanc Plectrophenax nivalis i hortolà groc Emberiza citrinella. També s’hi in clouen 15 observa cions a Balea rs homologa des pel Comité de Rarezas de la Sociedad Españo la de Ornitolo gía (CR-SeO), en què destaquen quatre re gistres homologats per primera vegada a les Balears, el moretó de collar Aythya collaris, corriol coablanca Calidris fuscicollis, boscarla de Blyth Acrocephalus dumetorum i busqueret sard Sylvia sarda. les altres observacions són l’arpella pàl·lida Circus macrourus, cegall reial Gallinago media, titina d’esquena olivàcia Anthus hodgsoni, busqueret xerraire Sylvia curruca, busqueret garriguer subespècie oriental Sylvia cantillans albistriata, i ull de bou de dues retxes Phylloscopus inornatus.Balearic Bird Rarities Committee report for 2009. The Ornithological Rarities Committee of the GOB presents its annual report. A total of 31 records was accepted corresponding to the following species, which include one first Balearic record, jackdaw Corvus monedula. The other records were: common scoter Melanitta nigra, little crake Porzana parva, dotterel Charadrius morinellus, herring gull Larus argentatus, great black-backed gull Larus marinus, woodlark Lululla arborea, western olivaceous warbler Hippolais opaca, orphean warbler Sylvia hortensis, iberian chiffchaff Phylloscopus ibericus, red-backed shrike Lanius collurio, snowfinch Montifringilla nivalis, trumpeter finch Bucanetes githagineus, snow bunting Plectrophenax nivalis, yellowhammer Emberiza citrinella. An additional 15 Balearic records were determined by the national Rarities Committee of the Sociedad española de Ornitologia (CR-SeO), the most notable of which were 4 first records for the Balearics: ring-necked duck Aythya collaris, white-rumped sandpiper Calidris fuscicollis, Blyth’s reed warbler Acrocephalus dumetorum and Marmora’s warbler Sylvia sarda. The other accepted records were pallid harrier Circus macrourus, great snipe Gallinago media, olive-backed pipit Anthus hodgsoni, lesser whitethroat Sylvia curruca, the eastern subspecies of the subalpine warbler Sylvia cantillans albistriata and yellowbrowed warbler Phylloscopus inornatus
Homologació de rareses ornitològiques a Balears. Informe de 2010
Homologació de rareses ornitológiques a Balears. Informe de 2010. Vintè informe anual que presenta el Comitè de Rareses Ornitològiques del GOB. S’han homologat 31 registres, corresponents a les seguents espècies, de les quals destaquen dos re gistre homologats per primera vegada a les Balears, de la gavina atlàntica subespècie Larus argentatus argentatus. Altres cites són: rascletó Porzana parva, rasclet gris Porzana pusilla, fuell de collar Endromias morinellus, gavina atlàntica Larus argentatus, llambritja becvermella Hydroprogne caspia, siboc Caprimulgus ruficollis, coadreta Cercotrichas galactotes, boscaler Locustella luscinioides, bosqueta pàl·lida Hippolais opaca, busqueret emmascarat Sylvia hortensis, capsigrany d’esquena roja Lanius collurio, gorrió d’ala blanca Montifringilla nivalis, pinsà trompeter Bucanetes githagineus i sit blanc Plectrophenax nivalis. També s’hi in clouen 10 observa cions a Balea rs homologa des pel Comité de Rarezas de la Sociedad Españo la de Ornitolo gía (CR-SEO), en què destaquen un re gistre homologat per primera vegada a les Balears, coa-roja diademada Phoenicurus moussieri. Les altres observacions són cegall reial Gallinago media, tórtora del Senegal Streptopelia senegalensis, titina de Hodgson Anthus hodgsoni, busqueret xerraire Sylvia curruca, ull de bou de dues retxes Phylloscopus inornatus, menjamosques de collar Ficedu la albicollis.Ratification of ornithological rarities in the Balearics. 2010 Report. The twentieth annual report of the GOB Ornithological Rarities Committee is presented. Thirty-one records have been accepted relating to the following species, including the first two Balearic sightings of the Herring gull subspecies Larus argentatus argentatus. The remaining records comprise Little crake Porzana parva, Baillon’s crake Porzana pusilla,Dotterel Endromias morinellus, herring gull L. argentatus, Caspian tern Hydroprogne caspia, Red-necked nightjar Caprimulgus ruficollis, Rufous bush robin Cercotrichas galactotes, Savi’s warbler Locustella luscinioides, Western olivaceous warbler Hippolais opaca, Orphean warbler Sylvia hortensis, red-backed shrike Lanius collurio, snow finch Montifringilla nivalis, Trumpeter finch Bucanetes githagineus and Snow bunting Plectrophenax nivalis. Also included are ten Balearic records accepted by the Spanish Rarities Committee (CR-SEO), the most notable of which is the first record of Moussier’s redstart Phoenicurus moussieri. The others are great snipe Gallinago media, Laughing dove Streptopelia senegalensis, Olive-backed pipit Anthus hodgsoni, Lesser whitethroat Sylvia curruca, Yellow-browed warbler Phylloscopus inornatus and Collared flycatcher Ficedula albicollis
Valuing Ecosystem Services in Semi-arid Rangelands through Stochastic Simulation
Ecosystem services and economic returns from semi-arid rangelands are threatened by land degradation. Policies to improve ecosystem service delivery often fail to consider uncertainty in economic returns gained through different land uses and management practices. We apply an analytical framework using stochastic simulation to estimate the range of potential monetary outcomes of rangeland ecosystem services under different land uses, including consideration of the uncertainty and variability of model parameters. We assess monetary and non-monetary dimensions, including those ecosystem services with uncertain and missing information, for communal rangelands, commercial ranches, game farms and Wildlife Management Areas in southern Kgalagadi District, Botswana. Public land uses (communal grazing areas and protected conservation land in Wildlife Management Areas) provide higher economic value than private land uses (commercial ranches and game farms), despite private land uses being more profitable in their returns from meat production. Communal rangelands and protected areas are important for a broader range of ecosystem services (cultural/spiritual services, recreation, firewood, construction material and wild food), which play a key role in sustaining the livelihoods of the largest share of society. The full range of ecosystem services should therefore be considered in economic assessments, while policies targeting sustainable land management should value and support their provision and utilisation. By forecasting the range of plausible ecosystem values of different rangeland land uses in monetary terms, our analysis provides policymakers with a tool to assess outcomes of land use and management decisions and policies
Scale dependency in the hydromorphological control of a stream ecosystem functioning
Physical habitat degradation is prevalent in river ecosystems. Although still little is known about the ecological consequences of altered hydromorphology, understanding the factors at play can contribute to sustainable environmental management. In this study we aimed to identify the hydromorphological features controlling a key ecosystem function and the spatial scales where such linkages operate. As hydromorphological and chemical pressures often occur in parallel, we examined the relative importance of hydromorphological and chemical factors as determinants of leaf breakdown. Leaf breakdown assays were investigated at 82 sites of rivers throughout the French territory. Leaf breakdown data were then crossed with data on water quality and with a multi-scale hydro- morphological assessment (i.e. upstream catchment, river segment, reach and habitat) when quantitative data were available. Microbial and total leaf breakdown rates exhibited differential responses to both hydromorphological and chemical alterations. Relationships between the chemical quality of the water and leaf breakdown were weak, while hydromorphological integrity explained independently up to 84.2% of leaf breakdown. Hydrological and morphological parameters were the main predictors of microbial leaf breakdown, whereas hydrological parameters had a major effect on total leaf breakdown, particularly at large scales, while morphological parameters were important at smaller scales. Microbial leaf breakdown were best predicted by hydromorphological features defined at the upstream catchment level whereas total leaf breakdown were best predicted by reach and habitat level geomorphic variables. This study demonstrates the use of leaf breakdown in a biomonitoring context and the importance of hydromorphological integrity for the functioning of running water. It provides new insights for envi- ronmental decision-makers to identify the management and restoration actions that have to be un- dertaken including the hydromorphogical features that should be kept in minimal maintenance to support leaf breakdown
South Sudan community garden project : Manchester, New Hampshire, USA
The South Sudan Community garden project is a program designed for the South Sudanese refugees between ages 24 to 44 years old living in New Hampshire. The purpose of this project is to provide Sudanese refugees with gardening-related skills and resources ownership that will enable them to advance closer to self-employment and personal goals to give them an opportunity to become active participants in the social, political and economic richness of American life. The main purpose is to empower south Sudanese refugees with the ownership that they need to gain self employment and better economic opportunities in order to tackle poverty by increasing their household income. This project is implemented in partnership with the International Institute of New Hampshire (IINH) and South Sudanese Community Center (SSCC) at Manchester, NH, for an initial period of seven months. The mission of both (IINH) and (SSCC) is to provide the resources, land, and tools, access to trades in order to become economically self-sufficient. The International Institute NH's Agriculture has long history of helping refugees in farming. Based on their broad experiences in this field, the project benefitted from their partnership and support to the participants. (Author abstract)Gob, M. G. (2011). South Sudan community garden project Manchester, New Hampshire, USA. Retrieved from http://academicarchive.snhu.eduMaster of Science (M.S.)School of Community Economic Developmen
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