Tạp chí Hóa học, 55(1): 24-30, 2017<br />
DOI: 10.15625/0866-7144.2017-00411<br />
<br />
1*<br />
<br />
T<br />
1<br />
<br />
, Bjarne W. Strowble2<br />
h<br />
<br />
3<br />
<br />
Hàn lâm Khoa h<br />
<br />
4<br />
<br />
n<br />
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2<br />
3<br />
<br />
VN<br />
4<br />
<br />
Đến Tòa soạn 22-12-2015; Chấp nhận đăng 6-02-2107<br />
<br />
Abstract<br />
This study investigated the effect of dissolved organic carbon (DOC), sodium dodecyl sulfate (SDS) and sodium<br />
oxalate (OXa) on desorption of endosulfan and dichlorodiphenyltrichloroethane (DDT) from soil in to water. The<br />
individual and interaction effects of three control parameters (DOC, SDS and OXa) on concentration of pesticides<br />
desorption was estimated by central composite rotatable design. Quadratic regression equations of response function<br />
(pesticides desorption) and variables were estimated. Statistical significant of models were confirm by square regression<br />
coefficient R2 which are 0.976 and 0.984 for endosulfan and DDT, respectively, adjusted square regression coefficient<br />
(R2adj) are 0.952<br />
Effects<br />
of independent variables DOC, SDS and Oxa on regression desorption concentrations pesticides were linear throughout<br />
regression coefficients at linear.<br />
Keywords. Response surface methodology, modeling, fenobucarb, dissolve organic carbon, surfactant.<br />
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Trịnh Thu Hà và cộng sự<br />
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dichlorometan:3 ml metanol:3 ml H2<br />
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DOC<br />
(mg/l)<br />
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SDS<br />
(cmc)<br />
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Oxa<br />
(M)<br />
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Endosulfan<br />
(Y1)<br />
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DDT<br />
(Y2)<br />
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-1<br />
+1<br />
-1<br />
+1<br />
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7,85<br />
33,65<br />
54,90<br />
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59,22<br />
94,96<br />
63,75<br />
26,40<br />
77,23<br />
11,49<br />
21,50<br />
56,00<br />
97,00<br />
56,50<br />
52,38<br />
59,69<br />
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5,96<br />
16,91<br />
38,79<br />
41,28<br />
30,97<br />
45,83<br />
78,45<br />
65,17<br />
32,93<br />
70,23<br />
7,35<br />
20,72<br />
57,29<br />
75,22<br />
56,12<br />
57,74<br />
58,48<br />
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26<br />
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Trịnh Thu Hà và cộng sự<br />
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TCHH, 55(1) 2017<br />
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25 µm) (P<br />
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18,73<br />
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< t(0,975;2) = 4,30.<br />
<br />
Modde 8.2.<br />
<br />
[endosulfan] = -50,54 + 1,04[DOC] + 38,75[SDS] + 81,75[Oxa] – 3,85[SDS]2 + 3925[Oxa]2<br />
- 0,17[DOC]x[SDS] – 4,65[DOC]x[Oxa] -1,47[SDS]x[Oxa]<br />
(6)<br />
[DDT] = -51,35 + 0,93[DOC] + 38,09[SDS] + 324[Oxa] – 0,004[DOC]2 – 4,55[SDS]2<br />
- 0,092[DOC]x[SDS] – 1,19[DOC]x[Oxa]<br />
<br />
2<br />
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2<br />
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-test) [17].<br />
2<br />
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2<br />
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endosulfan, R2adj<br />
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27<br />
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(7)<br />
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adj<br />
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(R2adj = 0,952 cho<br />
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bon…<br />
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TCHH, 55(1) 2017<br />
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