scholarly journals Migration Mechanism of Organic Pollutants in National Water-body Sediments

2011 ◽  
Vol 3 (1) ◽  
Author(s):  
Haiyuan Qiu
Keyword(s):  
Organic Pollutants ◽  
Water Body ◽  
Migration Mechanism ◽  
National Water

Biodegradation of organic pollutants in a water body

2016 ◽  
Vol 54 (7) ◽  
pp. 1387-1403 ◽  
Author(s):  
Iulia Martina Bulai ◽  
Ezio Venturino
Keyword(s):  
Organic Pollutants ◽  
Water Body

Organic Pollutants Removal of Polluted Water Body by a Hybrid Biofilm Reactor Using Filamentous Bamboo as Bio-Carrier

2012 ◽  
Vol 209-211 ◽  
pp. 1977-1980
Author(s):  
Wen Ping Cao ◽  
Hou Hu Zhang ◽  
Yin Mei Wang
Keyword(s):  
Organic Pollutants ◽  
Water Body ◽  
Removal Rate ◽  
Biofilm Reactor ◽  
Cod Removal ◽  
Polluted Water ◽  
Landscape Water ◽  
Organic Pollutants Removal ◽  
Cod Removal Rate ◽  
Pollutants Removal

The purpose of this study is to investigate the efficiency and characteristics for treatment of polluted landscape water using filamentous bamboo as bio-carrier. Results demonstrated that the COD removal rate could be increased more 13% because glucose was added into the raw. And the COD removal was mainly decided for the biofilm on the filamentous bamboo, which is 2.53 times higher than activitcd sludge in a batch hybrid unit. Additionally, Rich biological phases was obversed during the test.

scholarly journals On The Possible Leakage of ET-RR1 Liquid Waste Tank: Hydrological and Migration Modes Studies

2005 ◽  
Vol 5 ◽  
pp. 234-252 ◽  
Author(s):  
N. S. Mahmoud ◽  
S. T. EL-Hemamy
Keyword(s):  
Water Body ◽  
Unsaturated Zone ◽  
Settling Tank ◽  
Liquid Waste ◽  
Water Velocity ◽  
Water Levels ◽  
Retardation Factor ◽  
Specific Distribution ◽  
Migration Mechanism ◽  
Instantaneous Release

The first Egyptian (ET-RR1) research reactor has been in operation since 1961 at the Egyptian Atomic Energy Authority (EAEA) Inshas site. Therefore, at present, it faces a serious problem due to aging equipment, especially those directly in contact with the environment such as the underground settling tanks of nuclear and radioactive waste. The possible leakage of radionuclides from these aging tanks and their migration to the aquifer was studied using instantaneous release.This study was done based on the geological and hydrological characteristics of the site, which were obtained from the hydrogeological data of 25 wells previously drilled at the site of the reactor[1]. These data were used to calculate the trend of water levels, hydraulic gradient, and formulation of water table maps from 1993–2002. This information was utilized to determine water velocity in the unsaturated zone.Radionuclides released from the settling tank to the aquifer were screened according to the radionuclides that have high migration ability and high activity. The amount of fission and activation products of the burned fuels that contaminated the water content of the reactor pool were considered as 10% of the original spent fuel. The radionuclides considered in this case were H-3, Sr-90, Zr-93, Tc-99, Cd-113, Cs-135, Cs-137, Sm-151, Pu-238, Pu-240, Pu-241, and Am-241.The instantaneous release was analyzed by theoretical calculations, taking into consideration the migration mechanism of the various radionuclides through the soil space between the tank bottom and the aquifer. The migration mechanism through the unsaturated zone was considered depending on soil type, thickness of the unsaturated zone, water velocity, and other factors that are specific for each radionuclide, namely retardation factor, which is the function of the specific distribution coefficient of each radionuclide. This was considered collectively as delay time. Meanwhile, the mechanism of radionuclide migration during their passage in the water body of the aquifer was the main focus of this study.The degree of water pollution in the aquifer at a point of contact with the main water body of Ismailia Canal 1000 m from the reactor site was assessed for the instantaneous release by comparing the results obtained with the regulations of the standard limit of radionuclides in drinking water[2,3].

scholarly journals Outorga e suas implicações na piscicultura no entorno do reservatório de Furnas

2019 ◽  
Vol 29 (2) ◽  
pp. 143-157
Author(s):  
Franciny Oliveira de Deus ◽  
Marcelo de Oliveira Latuf
Keyword(s):  
Water Resources ◽  
Water Body ◽  
Common Good ◽  
Fish Farming ◽  
Public Domain ◽  
Water Bodies ◽  
The Public ◽  
Multiple Uses ◽  
Environmental Demands ◽  
National Water

A gestão de recursos hídricos é urgente e permite atender às demandas econômicas, sociais e ambientais. Entretanto, muitas vezes, surgem conflitos em relação ao seu uso. A água é um bem de uso comum do povo, portanto, ela é de domínio público, mas para que ocorra um consumo em níveis sustentáveis é necessário obter autorização, quando se trata de intervenção em um corpo hídrico, relativa à quantidade, qualidade ou regime das águas, essa autorização é denominada de Outorga de Direito de Uso de Recursos Hídricos. Na piscicultura a outorga tem papel fundamental, pois ela regularizará a prática do cultivo de peixes e contribuirá para evitar que corpos hídricos sejam contaminados com o descarte irregular dos resíduos do cultivo.Palavras-chave: Política Nacional de Recursos Hídricos, Usos múltiplos, Economia da água.Abstract The management of water resources is urgent and allows to meet the economic, social and environmental demands. However, conflicts often arise concerning its use. Water is a common good; therefore it is in the public domain, but for consumption to occur at sustainable levels it is necessary to obtain authorization when it comes to intervention in a water body, concerning the quantity, quality or regime of water, this authorisation is called Granting of Right to Use Water Resources. In fish farming, the grant has a fundamental role since it will regularise the practice of fish farming and will help prevent water bodies from being contaminated with the irregular disposal of crop residues.Keywords: National Water Resources Policy, Multiple uses, Water economy.

Evaluating Risk After a Hazardous Waste Treatment Plant Released Persistent Organic Pollutants: Part 3, Aboriginal Health Risk and Impact

2018 ◽  
Vol 2 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Tee L. Guidotti
Keyword(s):  
Health Risk ◽  
Organic Pollutants ◽  
Persistent Organic Pollutants ◽  
Waste Treatment ◽  
Treatment Plant ◽  
Aboriginal Health ◽  
Treatment Center ◽  
Hazardous Waste Treatment ◽  
Waste Treatment Plant ◽  
Health Canada

On 16 October 1996, a malfunction at the Swan Hills Special Waste Treatment Center (SHSWTC) in Alberta, Canada, released an undetermined quantity of persistent organic pollutants (POPs) into the atmosphere, including polychlorinated biphenyls, dioxins, and furans. The circumstances of exposure are detailed in Part 1, Background and Policy Issues. An ecologically based, staged health risk assessment was conducted in two parts with two levels of government as sponsors. The first, called the Swan Hills Study, is described in Part 2. A subsequent evaluation, described here in Part 3, was undertaken by Health Canada and focused exclusively on Aboriginal residents in three communities living near the lake, downwind, and downstream of the SHSWTC of the area. It was designed to isolate effects on members living a more traditional Aboriginal lifestyle. Aboriginal communities place great cultural emphasis on access to traditional lands and derive both cultural and health benefits from “country foods” such as venison (deer meat) and local fish. The suspicion of contamination of traditional lands and the food supply made risk management exceptionally difficult in this situation. The conclusion of both the Swan Hills and Lesser Slave Lake studies was that although POPs had entered the ecosystem, no effect could be demonstrated on human exposure or health outcome attributable to the incident. However, the value of this case study is in the detail of the process, not the ultimate dimensions of risk. The findings of the Lesser Slave Lake Study have not been published previously and are incomplete.

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