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171.
Lojpur Vesna Krstić Jelena Kačarević-Popović Zorica Filipović Nenad Validžić Ivana Lj. 《Environmental Chemistry Letters》2018,16(2):659-664
Environmental Chemistry Letters - Producing green and efficient energy sources is a major challenge. As a consequence, the use of photovoltaic devices for conversion of light into electricity is... 相似文献
172.
Małgorzata Piecha Mohamed Sarakha Polonca Trebše Drago Kočar 《Environmental Chemistry Letters》2010,8(2):185-191
In this study, stability of statin drugs in different conditions, such as various pH, diverse solvents ratio, presence of
UV, and sunlight have been investigated. Results suggest strong dependence of statins upon pH, potential environmental persistence
towards sun light, and UV light degradation via singlet excited state obtained by excitation into the π–π* band. In acidic conditions interconversion between lactone and hydroxy acid forms in aqueous solutions at room temperature
is retarded, while for the same sun-exposed samples are accelerated. Longer exposures lead to the degradation processes. Statin
interconversion in water is much lower than in acetonitrile. 相似文献
173.
Monitoring of nitrates in drinking water from agricultural and residential areas of Podravina and Prigorje (Croatia) 总被引:1,自引:0,他引:1
Jasna Nemčić-Jurec Miljenko Konjačić Anamarija Jazbec 《Environmental monitoring and assessment》2013,185(11):9509-9520
Nitrates are the most common chemical pollutant of groundwater in agricultural and suburban areas. Croatia must comply with the Nitrate Directive (91/676/EEC) whose aim is to reduce water pollution by nitrates originating from agriculture and to prevent further pollution. Podravina and Prigorje are the areas with a relatively high degree of agricultural activity. Therefore, the aim of this study was, by monitoring nitrates, to determine the distribution of nitrates in two different areas, Podravina and Prigorje (Croatia), to determine sources of contamination as well as annual and seasonal trends. The nitrate concentrations were measured in 30 wells (N?=?382 samples) in Prigorje and in 19 wells (N?=?174 samples) in Podravina from 2002 to 2007. In Podravina, the nitrate content was 24.9 mg/l and 6 % of the samples were above the maximum available value (MAV), and in Prigorje the content was 53.9 mg/l and 38 % of the samples above MAV. The wells were classified as correct, occasionally incorrect and incorrect. In the group of occasionally incorrect and incorrect wells, the point sources were within 10 m of the well. There is no statistically significant difference over the years or seasons within the year, but the interaction between locations and years was significant. Nitrate concentrations’ trend was not significant during the monitoring. These results are a prerequisite for the adjustment of Croatian standards to those of the EU and will contribute to the implementation of the Nitrate Directive and the Directives on Environmental Protection in Croatia and the EU. 相似文献
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