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result sql = Measuring and predicting environmental concentrations of pesticides in air after application to paddy water systems.
Measuring and predicting environmental concentrations of pesticides in air after application to paddy water systems.
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char = ;code = 32
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char = C;code = 67
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char = W;code = 87
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char = b;code = 98
char = >;code = 62
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char = i;code = 105
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char = u;code = 117
char = l;code = 108
char = a;code = 97
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char = e;code = 101
char = d;code = 100
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char = w;code = 119
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char = l;code = 108
char = ;code = 32
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char = e;code = 101
char = ;code = 32
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char = t;code = 116
char = e;code = 101
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = p;code = 112
char = e;code = 101
char = s;code = 115
char = t;code = 116
char = i;code = 105
char = c;code = 99
char = i;code = 105
char = d;code = 100
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = p;code = 112
char = a;code = 97
char = d;code = 100
char = d;code = 100
char = y;code = 121
char = ;code = 32
char = w;code = 119
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = r;code = 114
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char = ;code = 32
char = s;code = 115
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char = g;code = 103
char = n;code = 110
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char = f;code = 102
char = i;code = 105
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char = a;code = 97
char = n;code = 110
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char = ;code = 32
char = r;code = 114
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char = g;code = 103
char = r;code = 114
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char = s;code = 115
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char = n;code = 110
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char = l;code = 108
char = a;code = 97
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char = i;code = 105
char = o;code = 111
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char = e;code = 101
char = n;code = 110
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char = a;code = 97
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char = ;code = 32
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char = ;code = 32
char = K;code = 75
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char = ;code = 32
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char = ;code = 32
char = t;code = 116
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char = e;code = 101
char = ;code = 32
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char = t;code = 116
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char = i;code = 105
char = e;code = 101
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char = c;code = 99
char = o;code = 111
char = m;code = 109
char = p;code = 112
char = o;code = 111
char = u;code = 117
char = n;code = 110
char = d;code = 100
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char = ;code = 32
char = w;code = 119
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char = s;code = 115
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char = s;code = 115
char = t;code = 116
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char = l;code = 108
char = i;code = 105
char = s;code = 115
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char = e;code = 101
char = d;code = 100
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char = l;code = 108
char = i;code = 105
char = t;code = 116
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char = t;code = 116
char = e;code = 101
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = p;code = 112
char = a;code = 97
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char = a;code = 97
char = m;code = 109
char = e;code = 101
char = t;code = 116
char = r;code = 114
char = i;code = 105
char = z;code = 122
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
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char = ;code = 32
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char = h;code = 104
char = e;code = 101
char = ;code = 32
char = m;code = 109
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char = d;code = 100
char = e;code = 101
char = l;code = 108
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
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char = s;code = 115
char = c;code = 99
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char = b;code = 98
char = i;code = 105
char = n;code = 110
char = g;code = 103
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char = p;code = 112
char = e;code = 101
char = s;code = 115
char = t;code = 116
char = i;code = 105
char = c;code = 99
char = i;code = 105
char = d;code = 100
char = e;code = 101
char = ;code = 32
char = v;code = 118
char = o;code = 111
char = l;code = 108
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = l;code = 108
char = i;code = 105
char = z;code = 122
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = .;code = 46
char = <;code = 60
char = b;code = 98
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char = /;code = 47
char = >;code = 62
result sql = In this study, the volatilization of five pesticides applied to an artificial flooded paddy field was assessed using the theoretical profile shape (TPS) and the integrate horizontal flux (IHF) techniques. The dataset derived was utilized to improve the volatilization routine of the rice water quality (RICEWQ) model. The masses of pesticides ethoprophos, procymidone, metalaxyl, chlorpyrifos, and chlorpyrifos methyl volatilized from paddy water and their concentrations in paddy water were determined for a period of 6 d after application. The highest and lowest volatilization losses were observed for chlorpyrifos and metalaxyl, respectively, accounting for 3.3% and 0.03% of their initially applied amount. A rapid pesticide dissipation was evident in paddy water during the study period. The RICEWQ model was used to simulate the fate of pesticides in the artificial paddy system. The Kvolat, an empiric coefficient used by the model as an input parameter, was calculated for all pesticides through model calibration RICEWQ : simulated well the fate of pesticides in paddy water. A significant regression correlation between Henry's law constant (Hk) and Kvolat of the studied compounds was established which could facilitate the parametrization of the model for describing pesticide volatilization.

Publication: Environ. Sci. Technol. 2005 May 1 ;39(9)::2968-75.
Publication Date: 2005 May 1
Study Author(s): Ferrari, Federico;Karpouzas, Dimitrios G;Trevisan, Marco;Capri, Ettore;
Institution: Istituto di Chimica Agraria ed Ambientale, Università Cattolica del Sacro Cuore, Via Emilia Parmense 84, 29100 Piacenza, Italy. [email protected]
Shortcut link to this study:
In this study, the volatilization of five pesticides applied to an artificial flooded paddy field was assessed using the theoretical profile shape (TPS) and the integrate horizontal flux (IHF) techniques. The dataset derived was utilized to improve the volatilization routine of the rice water quality (RICEWQ) model. The masses of pesticides ethoprophos, procymidone, metalaxyl, chlorpyrifos, and chlorpyrifos methyl volatilized from paddy water and their concentrations in paddy water were determined for a period of 6 d after application. The highest and lowest volatilization losses were observed for chlorpyrifos and metalaxyl, respectively, accounting for 3.3% and 0.03% of their initially applied amount. A rapid pesticide dissipation was evident in paddy water during the study period. The RICEWQ model was used to simulate the fate of pesticides in the artificial paddy system. The Kvolat, an empiric coefficient used by the model as an input parameter, was calculated for all pesticides through model calibration RICEWQ : simulated well the fate of pesticides in paddy water. A significant regression correlation between Henry's law constant (Hk) and Kvolat of the studied compounds was established which could facilitate the parametrization of the model for describing pesticide volatilization.
PMID: 15926540

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