An understanding of the long-term changes in the nitrate and microbial contamination pattern of the groundwater of Sidi Bouzid （Centre West of Tunisia） is critical to conservation of drinking water in rural areas su...An understanding of the long-term changes in the nitrate and microbial contamination pattern of the groundwater of Sidi Bouzid （Centre West of Tunisia） is critical to conservation of drinking water in rural areas supporting mixed land-use activities such as cropping, livestock farming, and residence. The phreatic aquifer was revealed polluted by domestic disposals of the wastewaters in the urban zone. The average nitrate concentration in the groundwater of the east of the mioplioquaternary aquifer of Saddaguia （Sidi Bouzid） rose from 50 mg NO3- during 1996 to over 100 mg in 2003, which represents an increase of some 10 mg per year. Nitrate groundwater pollution during the period 1996-2003 was the result of the abusive use of fertilizers.In the cultivated zone, we must reduce the effects of the excessive use of the nitrogen fertilizers on the basis of monitoring soil once a year, managing water resources, rationalizing the use of the chemical substances. In urban zones, most of lost wells located in the perimeter reveal the gravity of the state of the aquifer. This last is organically polluted and requires an immediate action for the generalization of the purification network. We need to take into account the reality of under soil in all future planning＇s and arrangements. A scheme of sanitation seems necessary before all plans of arrangement. The extension of the sewer network must give the priority to the most vulnerable zones.展开更多
Waters in marine ecosystems are likely contamination. The origin of pollution may be industrial, radioactive, agricultural, urban mikobiologjike etc.. The study was conducted in the waters of the Adriatic sea ecosyste...Waters in marine ecosystems are likely contamination. The origin of pollution may be industrial, radioactive, agricultural, urban mikobiologjike etc.. The study was conducted in the waters of the Adriatic sea ecosystem aims to analyze the microbiological contamination areas. These waters are used for holiday purposes by citizens. The samplings of marine water are taken from the stratum water surface about 10 cm, at a distance 10-20 m by sea coast. These samples are examined in laboratory for determination of two micro organisms, indicators excrements pollution Faecal Coliform （FC） （ISO 9803） and FC, probably Streptococcus Faecal （FS） with Filtrate Membrane Method＇s in specific areas （ISO 7899-2）. In area Velipoja, Albania, the microbiologic elaborated analyses have resulted as follows： For FC and Streptococcus Faecal are given the minimal values FC-50, FS-50 and maximal values FC-90, FS-90 per 100 mL. About the evaluation of reaction （pH） is concluded that in Albania the sea waters coastal zones have a lightly alkaline ambient, where pH value is in the range 7.5-8.3, estimated according to recommended standards 6-9. No cases of red-tide algae development have been observed.展开更多
文摘An understanding of the long-term changes in the nitrate and microbial contamination pattern of the groundwater of Sidi Bouzid （Centre West of Tunisia） is critical to conservation of drinking water in rural areas supporting mixed land-use activities such as cropping, livestock farming, and residence. The phreatic aquifer was revealed polluted by domestic disposals of the wastewaters in the urban zone. The average nitrate concentration in the groundwater of the east of the mioplioquaternary aquifer of Saddaguia （Sidi Bouzid） rose from 50 mg NO3- during 1996 to over 100 mg in 2003, which represents an increase of some 10 mg per year. Nitrate groundwater pollution during the period 1996-2003 was the result of the abusive use of fertilizers.In the cultivated zone, we must reduce the effects of the excessive use of the nitrogen fertilizers on the basis of monitoring soil once a year, managing water resources, rationalizing the use of the chemical substances. In urban zones, most of lost wells located in the perimeter reveal the gravity of the state of the aquifer. This last is organically polluted and requires an immediate action for the generalization of the purification network. We need to take into account the reality of under soil in all future planning＇s and arrangements. A scheme of sanitation seems necessary before all plans of arrangement. The extension of the sewer network must give the priority to the most vulnerable zones.
文摘Waters in marine ecosystems are likely contamination. The origin of pollution may be industrial, radioactive, agricultural, urban mikobiologjike etc.. The study was conducted in the waters of the Adriatic sea ecosystem aims to analyze the microbiological contamination areas. These waters are used for holiday purposes by citizens. The samplings of marine water are taken from the stratum water surface about 10 cm, at a distance 10-20 m by sea coast. These samples are examined in laboratory for determination of two micro organisms, indicators excrements pollution Faecal Coliform （FC） （ISO 9803） and FC, probably Streptococcus Faecal （FS） with Filtrate Membrane Method＇s in specific areas （ISO 7899-2）. In area Velipoja, Albania, the microbiologic elaborated analyses have resulted as follows： For FC and Streptococcus Faecal are given the minimal values FC-50, FS-50 and maximal values FC-90, FS-90 per 100 mL. About the evaluation of reaction （pH） is concluded that in Albania the sea waters coastal zones have a lightly alkaline ambient, where pH value is in the range 7.5-8.3, estimated according to recommended standards 6-9. No cases of red-tide algae development have been observed.
