The aim of present research is to study the dispersion of air pollutants using the air quality model, AERMOD and to predict the impact of pollutants (PM<sub>10</sub>, NO<sub>2</sub> and CO) at ...The aim of present research is to study the dispersion of air pollutants using the air quality model, AERMOD and to predict the impact of pollutants (PM<sub>10</sub>, NO<sub>2</sub> and CO) at the receptor level released from Gas Based Power Plant (GBPP). The net-concentrations including monitored data plus predicted values of PM<sub>10</sub>, NO<sub>2</sub> and CO would be increased from base value 75 to 77.61 μg/m<sup>3</sup> with an increase of 3.48%, 22 to 26.66 μg/m<sup>3</sup> with an increase of 21.18% and 428 to 538.37 μg/m<sup>3</sup> with an increase of 25.79% respectively. The study of hill effect showed that it had profound impact upon the dispersion of pollutants and the ratio (with hill and without hill) of each pollutant was 3.89 for PM<sub>10</sub> (24 hr), 2.40 for NO<sub>2</sub> (24 hr) and 13.98 for CO (1 hr). The natural gas based plant not only decreases the pollution level but also reduces the hospital treatment cost and protects the public health. The modeling results suggest that the GBPP could be a clean technology as replacement of coal power plants located in the city which pollute the environment considerably in spite of control measures installed.展开更多
A facile, rapid and sensitive spectrophotometric method was developed for the determination of carbaryl in its formulations, water and grain （rice and wheat） samples with newly synthesised reagent. The proposed meth...A facile, rapid and sensitive spectrophotometric method was developed for the determination of carbaryl in its formulations, water and grain （rice and wheat） samples with newly synthesised reagent. The proposed method was based on the alkaline hydrolysis of carbaryl pesticide and thus resulted 1-naphthol was coupled with diazotised 4,4＇-methylene-bis-m-nitroaniline in basic medium （pH 9） to give red colored product having λmax 480 nm for diazonium method （DM） or 1-naphthol reacts with 4,4＇-methylene-bis-m-nitroaniline in the presence of oxidising agent potassium dichromate （K2Cr2O7） to give red colored product having λmax 510 nm for oxidation method （OM）. The formation of colored derivatives with the coupling agent is instantaneous and stable for 48 h （DM） and 32 h （OM） respectively. Beer＇s law was obeyed in the concentration range of 0.2--10.0 μg·mL ^-1 for DM and 0.2--0.150 μg·mL^-1 for OM. The proposed methods are sensitive, easy to operate and permitted for the determination of carbaryl with detection limits of 0.028 μg·mL^-1 for DM and 0.024 μg·mL^-1 for OM respectively. The experimental results indicate that the procedure can eliminate the fundamental interferences caused by other pesticides and non-target ions, which made the methods more sensitive and selective. The method was applicable to the determination of carbaryl residue in water and food grain samples up to μg level.展开更多
文摘The aim of present research is to study the dispersion of air pollutants using the air quality model, AERMOD and to predict the impact of pollutants (PM<sub>10</sub>, NO<sub>2</sub> and CO) at the receptor level released from Gas Based Power Plant (GBPP). The net-concentrations including monitored data plus predicted values of PM<sub>10</sub>, NO<sub>2</sub> and CO would be increased from base value 75 to 77.61 μg/m<sup>3</sup> with an increase of 3.48%, 22 to 26.66 μg/m<sup>3</sup> with an increase of 21.18% and 428 to 538.37 μg/m<sup>3</sup> with an increase of 25.79% respectively. The study of hill effect showed that it had profound impact upon the dispersion of pollutants and the ratio (with hill and without hill) of each pollutant was 3.89 for PM<sub>10</sub> (24 hr), 2.40 for NO<sub>2</sub> (24 hr) and 13.98 for CO (1 hr). The natural gas based plant not only decreases the pollution level but also reduces the hospital treatment cost and protects the public health. The modeling results suggest that the GBPP could be a clean technology as replacement of coal power plants located in the city which pollute the environment considerably in spite of control measures installed.
文摘A facile, rapid and sensitive spectrophotometric method was developed for the determination of carbaryl in its formulations, water and grain （rice and wheat） samples with newly synthesised reagent. The proposed method was based on the alkaline hydrolysis of carbaryl pesticide and thus resulted 1-naphthol was coupled with diazotised 4,4＇-methylene-bis-m-nitroaniline in basic medium （pH 9） to give red colored product having λmax 480 nm for diazonium method （DM） or 1-naphthol reacts with 4,4＇-methylene-bis-m-nitroaniline in the presence of oxidising agent potassium dichromate （K2Cr2O7） to give red colored product having λmax 510 nm for oxidation method （OM）. The formation of colored derivatives with the coupling agent is instantaneous and stable for 48 h （DM） and 32 h （OM） respectively. Beer＇s law was obeyed in the concentration range of 0.2--10.0 μg·mL ^-1 for DM and 0.2--0.150 μg·mL^-1 for OM. The proposed methods are sensitive, easy to operate and permitted for the determination of carbaryl with detection limits of 0.028 μg·mL^-1 for DM and 0.024 μg·mL^-1 for OM respectively. The experimental results indicate that the procedure can eliminate the fundamental interferences caused by other pesticides and non-target ions, which made the methods more sensitive and selective. The method was applicable to the determination of carbaryl residue in water and food grain samples up to μg level.
