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Anti-Salt Dam as a Means of Recovering Lowland Degraded by Sea Water: the Case of Lowland Ndour Ndour, Senegal
Bama Nati Aïssata Delphine,
Bado Boubié Vincent,
Soussou Sambou,
Mel Valère,
Gaye Cheikh Becaye
Issue:
Volume 2, Issue 3, June 2013
Pages:
79-84
Received:
5 May 2013
Published:
10 June 2013
Abstract: The reduction of the quantity of water that flows in the lowlands of Sine Saloun, toward the ocean, has favored saltwater intrusion. To fight against, anti-salt dikes were built. This study aimed to analyze: (1) the rainfall over the last years, in the region, in order to determine its variability likely to impact outcropping of salt. (2) The impact of the anti-salt dam on the protection and recovery of the salt lands. The level of the groundwater, standing water and salinity were monitored, during two wet seasons. The break occurred in 1967 and from this time, the rainfall started declining. The anti-salt dam slowed the progress of the seawater into the lowlands by maintaining a certain level of fresh water upstream. The most important determinant for agricultural redevelopment, in these degraded lands, is the amount of water that passes through.
Abstract: The reduction of the quantity of water that flows in the lowlands of Sine Saloun, toward the ocean, has favored saltwater intrusion. To fight against, anti-salt dikes were built. This study aimed to analyze: (1) the rainfall over the last years, in the region, in order to determine its variability likely to impact outcropping of salt. (2) The impac...
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An Evaluation of Slaughterhouse Wastes in South-West Nigeria
D. O. Omole,
A. S. Ogbiye
Issue:
Volume 2, Issue 3, June 2013
Pages:
85-89
Received:
20 May 2013
Published:
10 July 2013
Abstract: This study was carried out at ten randomly selected slaughterhouses situated in Lagos and Ogun States, Nigeria. The aim was to evaluate the current waste generation and waste handling practices while exploring the possibility of reducing to the barest minimum the percentage of live weight cow that is considered as waste. This was achieved through questionnaire application, live interviews, literature review and physical inspection. It was shown that just 5 % of the total slaughtered animal weight, arising from bovine blood, dung and undigested paunch contents, coupled with the large volume of water required to wash off this small percentage of animal parts constituted the greatest proportion of environmental problems associated with slaughterhouse operations. Ways through which these waste materials could be converted into wealth, thereby relieving the environment from their harmful effects were suggested.
Abstract: This study was carried out at ten randomly selected slaughterhouses situated in Lagos and Ogun States, Nigeria. The aim was to evaluate the current waste generation and waste handling practices while exploring the possibility of reducing to the barest minimum the percentage of live weight cow that is considered as waste. This was achieved through q...
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Reduction of Textile Dye by Using Heterogeneous Photocatalysis
Omprakash Sahu,
Karthikeyan. M. R
Issue:
Volume 2, Issue 3, June 2013
Pages:
90-94
Received:
15 May 2013
Published:
10 July 2013
Abstract: Dye waste water pollutants are the major sources of environmental pollution. Textile waste water introduces intensive color and toxicity to aquatic system. Dyes possess complex aromatic structure. Hence conventional biological treatment methods are ineffective for decolourisation and degradation. Now a day’s Heterogeneous photocatalysis method is used for the treatment of textile waste water. Due to the high photo catalytic activity and stability of Zinc oxide, it is generally used as a photo catalyst for the removal of organic pollutants. Therefore the study has been made to determine the amount of decolourisation of the Napthal ASG dye using the catalysts ZnO with the combination of UV irradiation by Batch process. The influence of parameters such as catalyst loading, reuse of catalyst and initial concentration of the dye has been studied. In Batch process, the optimum dosage of catalyst for the concentration of 41600 mg/L was about 20g/L and the efficiency was about 83.90%.The dye was completely degraded in 30 min. After the first usage of catalyst it is dried in the sunlight and then it is used for the second time , its efficiency is 80.25% and 71.34% for the third time reuse of dosage.
Abstract: Dye waste water pollutants are the major sources of environmental pollution. Textile waste water introduces intensive color and toxicity to aquatic system. Dyes possess complex aromatic structure. Hence conventional biological treatment methods are ineffective for decolourisation and degradation. Now a day’s Heterogeneous photocatalysis method is u...
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222Rn and 220Rn Concentrations Measured in Bottled Sweet Drinks and Their Residual Gases and Resulting Radiation Doses to the Consumers
Issue:
Volume 2, Issue 3, June 2013
Pages:
95-102
Received:
5 June 2013
Published:
10 July 2013
Abstract: Presently bottled sweet drinks are widely consumed by different age groups of individuals all over the world. Since bottling until consumption of sweet drinks, residual gas containing 222Rn and 220Rn isotopes is formed. To assessradiation dose to the consumers from the ingestion of sweet drinks, 222Rn and 220Rn concentrations were measured in different sweet drinks and their residual gases by using CR-39 and LR-115 type II solid state nuclear track detectors (SSNTDs). The measured 222Rn and 220Rn concentrations ranged from (0.3500.028) Bql-1 to (4.250.29) Bql-1 and (0.1400.008) Bql-1 to (4.250.38) Bql-1, respectively. α-activities due to the annual intake of 222Rn were assessed in the tissues and organs of the gastrointestinal tract of the considered consumers. Committed effective doses due to the ingestion of 222Rn contained in each sweet drink and its corresponding residual gas were evaluated in the gastrointestinal system of adult and teenager members of the Moroccan population. The maximum value of the committed effective dose due to 222Rn from the ingestion of the studied sweet drinks was found equal to7.9 µSv y-1.
Abstract: Presently bottled sweet drinks are widely consumed by different age groups of individuals all over the world. Since bottling until consumption of sweet drinks, residual gas containing 222Rn and 220Rn isotopes is formed. To assessradiation dose to the consumers from the ingestion of sweet drinks, 222Rn and 220Rn concentrations were measured in diffe...
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