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| Registros recuperados: 33 | |
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| Rashid, Gholami; Hekmat, Rabbani; Ali Nejat, Lorestani; Payam, Javadikia; Farzad, Jaliliantabar. |
| Agricultural machinery is an important source of emission of air pollutant in rural locations. This work deals with the effects of types of tractors and operation conditions on engine emission. The values of some exhaust gases (HC, CO, CO2, O2 and NO) from two common tractors (MF285 and U650) at three situations (use of ditcher, plowing and cultivator) were evaluated in the West of IRAN (Kermanshah). In addition, engine oil temperature at operation conditions was measured. Also results showed the values of exhaust HC and O2 of MF285 are lower than U650, while the other exhausts gases (CO, CO2, and NO) of MF285 are higher than U650. Value of NO emission increased as engine oil temperature increased. All of exhaust gases except CO have a significant... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Environmental pollution; Exhaust gases; Tractors. |
| Ano: 2013 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2363 |
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| Vázquez Luna, Dinora. |
| En México, el desarrollo basado en la industria petrolera ha afectado los suelos y recursos naturales del sureste del país; sin embargo, no hay estudios que vinculen sus efectos sobre el desarrollo equitativo de los habitantes en zonas contaminadas. Por ello, el objetivo del trabajo fue analizar desde la perspectiva de género, los efectos sociales sobre el desarrollo equitativo de las familias, en cuatro zonas de los ejidos de Humanguillo, Tabasco (Rovirosa, El Paraíso, La Ceiba y Gurría), que se ubican a una distancia de 0.5, 2.5, 7 y 12 kilómetros al sur la petroquímica La Venta. Se realizaron encuestas con enfoque de género y de salud, donde las unidades de análisis fueron las familias. Se realizaron análisis de suelos para determinar los efectos de la... |
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Palavras-chave: Género; Asma; Contaminación ambiental; Hidrocarburos; Alergias; Gender; Asthma; Environmental pollution; Hydrocarbons; Allergies; Doctorado; Desarrollo Rural. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/422 |
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| Vázquez Luna, Dinora. |
| En México, el desarrollo basado en la industria petrolera ha afectado los suelos y recursos naturales del sureste del país; sin embargo, no hay estudios que vinculen sus efectos sobre el desarrollo equitativo de los habitantes en zonas contaminadas. Por ello, el objetivo del trabajo fue analizar desde la perspectiva de género, los efectos sociales sobre el desarrollo equitativo de las familias, en cuatro zonas de los ejidos de Humanguillo, Tabasco (Rovirosa, El Paraíso, La Ceiba y Gurría), que se ubican a una distancia de 0.5, 2.5, 7 y 12 kilómetros al sur la petroquímica La Venta. Se realizaron encuestas con enfoque de género y de salud, donde las unidades de análisis fueron las familias. Se realizaron análisis de suelos para determinar los efectos de la... |
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Palavras-chave: Género; Asma; Contaminación ambiental; Hidrocarburos; Alergias; Gender; Asthma; Environmental pollution; Hydrocarbons; Allergies; Doctorado; Desarrollo Rural. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/422 |
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| Ferreira Araujo, Daniel; Ponzevera, Emmanuel; Briant, Nicolas; Knoery, Joel; Bruzac, Sandrine; Sireau, Teddy; Brach-papa, Christophe. |
| Toulon bay is severely impacted by metal contamination induced by past and recent naval activities. In this work, Cu, Zn and Pb isotope compositions and elemental concentrations of fifty-five surface sediments were determined in order to map the spatial distribution of anthropogenic and natural sources along this land-sea continuum. Two sub-systems of Toulon Bay, the Small and Large bays, showed well-marked patterns on metal contamination levels and isotope signatures for Cu and Pb. The Small bay had the highest metal concentrations, and displayed average Pb and Cu isotope compositions of 1.1664 ± 0.0043 (1s, expressed as 206Pb/207Pb ratios) and −0.17 ± 0.19‰ (1s, expressed as δ65CuNIST values), respectively. It contrasted with the Large bay, with moderate... |
| Tipo: Text |
Palavras-chave: Metal isotopes; Isotope tracers; Geochemical isotopes; Environmental pollution; Coastal pollution; Toulon bay. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00566/67784/67226.pdf |
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| Vaz,Sérgio Renato; Lenzi,Ervim; Luchese,Eduardo Bernardi; Fávero,Luzia O. B.. |
| Este trabalho analisa a dinâmica do chumbo no lago do parque do Ingá, Maringá - PR. Mensalmente durante um ano foram coletadas amostras de água e sedimentos e o pH e temperatura medidos no ato da coleta. Nas amostras de água foi determinada a Demanda Química de Oxigênio (DQO) e a concentração total de Pb na água e sedimentos. A determinação da concentração Pb na água e sedimentos foi feita com a técnica da espectrometria da absorção atômica, modalidade chama. Os valores médios mensais encontrados, em intervalos e médias globais foram respectivamente: concentração de Pb na água, em ng.mL-1, não detectado (nd) - 55,56 e 19,23; Pb em sedimentos, em µg.g-1, 48,73 - 92,87 e 71,93; pH, 7,02 - 8,23 e 7,60; temperatura, em °C, 19,33 - 27,48 e 23,73; DQO, em... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lead; Lakes; Environmental pollution; Elements environmental dynamic; Environment. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131998000400010 |
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| Paglia,Edmilson Cezar; Serrat,Beatriz Monte; Freire,Clarice Azevedo de Luna; Sirtoli,Ana Rosa dos Anjos; Veiga,Andrea Mayer. |
| The objective of this research was to evaluate the potassium interference, used as supplementary fertilization, in the ions leaching, in a soil that was treated with alkalinized sewage sludge and cultivated, with maize. The experimental set with sewage sludge results showed an increase of the potassium concentration and chloride concentration in the leached solution, as well as the reduction of the Al3+ concentration, as the doses of potassium fertilizer applied to the soil were increased, for the four leachings. The presence of sewage sludge treated with lime increased the concentration of NO3 -, Cl-, Ca2+, Mg2+ and Al3+ in the solutions in the majority of leachings. Values of Al3+ were higher than 0.1 mg L-1, than in all leachings when sewage sludge was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biosoli; Ionic leaching; Water contamination; Environmental pollution. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000400004 |
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| Adekanbi, E.O.; Okoye, B.C.O.; Ajao, E.A.. |
| The state of pollution in the Lagos lagoon was examined by a field survey of twenty-six sites (stations) in the dry and wet season in 1985. Some selected sites were further re-examined in the same period in 1986. The sediment trace metals and total hydrocarbons were analysed. The relationship between non residual and residual trace elements was examined. For both years of study, total trace metal levels (mg/kg) fell in the ranges: Cu,1.9 – 132.4, Cr, 2.9 – 167; 7.8 – 830. 6; Ph, 1.6 – 483.1 and Cd, 0.04 – 15.5. Total hydrocarbon concentrations in 1985 ranged from 0.25 to 2766.27 mg/g with high concentrations in muddy and sandy sediments. The results show marked variations and non – uniform distribution from one season to another. With few exceptions,... |
| Tipo: Working Paper |
Palavras-chave: Environmental pollution; Coastal waters. |
| Ano: 1991 |
URL: http://hdl.handle.net/1834/269 |
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| Ling, Jing; Deng, Liang-ji. |
| By using factor analysis method and establishing analysis indicator system from four aspects including crop production, poultry farming, rural life and township enterprises, the difference, features, and types of factors influencing the rural environmental pollution in the hilly area in Sichuan Province, China. Results prove that the major factor influencing rural environmental pollution in the study area is livestock and poultry breeding, flowed by crop planting, rural life, and township enterprises. Hence future pollution prevention and control should set about from livestock and poultry breeding. Meanwhile, attention should be paid to prevention and control of rural environmental pollution caused by rural life and township enterprise production. |
| Tipo: Journal Article |
Palavras-chave: Rural area; Environmental pollution; Influencing factors; Factor analysis; Hilly area in Sichuan Province; China; Agribusiness. |
| Ano: 2011 |
URL: http://purl.umn.edu/113931 |
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| Teixeira,Sandra Tereza; Melo,Wanderley José de; Silva,Érica Tomé. |
| The application of water treatment sludge (WTS) to degraded soil is an alternative for both residue disposal and degraded soil reclaim. This study evaluated effects of the application of water treatment sludge to a Typic Hapludox soil degraded by tin mining in the National Forest of Jamari, State of Rondonia, Brazil, on the content of heavy metals. A completely randomized experimental design with five treatments was used: control (n = 4); chemical control, which received only liming (n = 4); and rates D100, D150 and D200, which corresponded to 100, 150 and 200 mg of N-sludge kg-1 soil (n = 20), respectively. Thirty days after liming, period in which soil moisture was kept at 70% of the retention capacity, soil samples were taken and analyzed for total and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil reclaim; Tin mining; Mehlich 1; Environmental pollution. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000500016 |
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| Oliveira,Jeani Moreira de; Silva,Sérgio Henrique Godinho; Menezes,Michele Duarte de; Kämpf,Nestor; Curi,Nilton. |
| ABSTRACT Environmental pollution is a problem that has been noted due to changes in the environment, affecting natural resources. Regarding the soil, it may offer great potential for waste disposal. Thus, this study aims to propose criteria for evaluating local suitability for waste disposal, according to soil and terrain attributes for southern Minas Gerais State, and to apply those criteria to define the most appropriate locations for installation of septic systems in a pilot watershed. Literature and the authors' experience were used to propose the more important criteria regarding the suitability of sites for waste disposal. The set of attributes taken into account was grouped into four suitability classes: Adequate, Regular, Restricted and Inadequate.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Environmental pollution; Watershed; Pedology.. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542016000100037 |
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| Barriquelo,Marcilene Ferrari; Juliatti,Marinês Aparecida; Silva,Margarete Soares da; Lenzi,Ervim. |
| Lead (Pb) behavior was studied in soil treated twice with sewage sludge contaminated with lead at interval of 18 months. Soil samples received five different treatments: three with lead [0 (reference); 2,500; 5,000 mug g-1] and two with a mixture of lead and cadmium (interferer) (2,500 + 2,500 and 5,000 + 5,000 mug g-1, respectively). Vases containing treated soil were cultivated with maize in a greenhouse for 75 days. Pb was extracted using nitric perchloric digestion and analyzed by atomic absorption spectroscopy. The soil, containing sewage sludge contaminated by lead presented a higher concentration of Pb. The metal concentration remained constant in all treatments at 20-60 cm depth. No absorption of Pb by the plants was detected. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sewage sludge; Heavy metal; Lead; Environmental pollution. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000400002 |
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| Mwashote, B.M.. |
| Flame absorption spectrophotometry was used to investigate the concentration and distribution of cadmium and lead in water, sediments and selected fish species in Makupa and Tudor creeks in Mombasa, Kenya between May 1997 and March 1998. The results were compared with those obtained in relatively less anthropogenically influenced areas along the Kenyan coast. The mean concentrations for Pb ranged from not detectable (nd) to 0.012 mg/l, 0.2 to 58.0 mg/kg and nd to 59.3 mg/kg in water, sediment and fish samples respectively. Cadmium concentrations in water were generally below detection limits, while in sediment and fish samples, they ranged from nd to 1.0 mg/kg and nd to 3.7 mg/kg respectively. Overall, Pb and Cd concentrations were low in the water column... |
| Tipo: Journal Contribution |
Palavras-chave: Pollution surveys; Minerals; Environmental pollution; Http://aims.fao.org/aos/agrovoc/c_32981. |
| Ano: 2003 |
URL: http://hdl.handle.net/1834/967 |
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| Moreira,Ivan; Fraga,Alessandro Luis; Paiano,Diovani; Oliveira,Gisele Cristina de; Scapinello,Cláudio; Martins,Elias Nunes. |
| The effects of increasing lysine levels on nitrogen balance of pigs fed on low protein diets were evaluated. Four treatments (diets) containing lysine levels (0.8, 1.0 1.2 and 1.4%) were applied to 12 starting (20.0 ± 1.8 kg) barrow pigs. Methionine, threonine and tryptophan were kept constant to the lysine ratio in all diets. Feces and urine were collected during a 5-day period. Nitrogen output in urine (NOU), total nitrogen output (TNO), nitrogen retention (NR), net protein utilization (NPU), biological value or feed protein (BVFP), urine urea nitrogen (UUN), and plasma urea nitrogen (PUN) were determined. PUN showed high negative correlations with BVFP (-0.84), NPU (-0.76), and NR (-0.78) and a positive correlation (0.79) to NOU. Lowest nitrogen... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Environmental pollution; Crystalline amino acids; Protein metabolism; Slurry. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000100012 |
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| Doblinski,André F.; Sampaio,Silvio C.; Silva,Vanderlei R. da; Nóbrega,Lúcia H. P.; Gomes,Simone D.; Dal Bosco,Tatiane C.. |
| In order to verify the environmental impact of the application of swine farming wastewater in bean crop, an experiment was set up in the Experimental Farm of PUCPR - Toledo, PR, Brazil. Runoff and soil samples were collected at the end of the experiment. Four wastewater treatments were utilized during the experiment (50, 100, 150 and 200 m³ ha-1) and the without wastewater as the control. The results demonstrate that (i) the amounts of potassium, phosphorus, and nitrogen in runoff are exponential, (ii) that phosphorus has a seven-fold polluting potential compared to potassium and three-fold compared to nitrogen, and (iii) that the mobility of potassium in the soil profile is the largest, followed by those of nitrogen and phosphorus. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water reuse; Runoff; Environmental pollution. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662010000100012 |
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| Registros recuperados: 33 | |
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