Abstract

Photolysis behavoirs of pesticides(Chlorothalonil and Endosulfan) over UV irradiation UV irradiation with pH 3.0 and irradiation with 3.5% salt were studied. The analyses of pesticides were carried out using gas chromatograph with an electron-capture detector, total organic carbon, and Ion chromatograph, respectively. The reactions were conducted in a alumium annular reactor equipped with a low pressure mercury multilamp ($8W{\times}6$) and initial concentration was 10 ppm. Chlorothalonil was almost photodegraded by UV irradiation, UV irradiation with pH 3.0 and 3.5% salt within 30 min of reaction time. Endosulfan-${\alpha}$,${\beta}$(100%) were photodegraded to 38% of Endosulfan-${\alpha}$ and 25% of Endisulfan-${\beta}$ by UV irradiation. Endosulfan-${\alpha}$(83%) was photodegraded to 66% by UV irradiation, 70% by UV irradiation and pH 3.0 and 75% by UV irradiation and 3.5% salt. Endosulfan-${\beta}$(16%) was photodegraded to 80% by UV irradiation, 98% by UV irradiation and pH 3.0 and 90% by UV irradiation and 3.5% salt.

Keywords

• Photolysis;
• UV Irradiation;
• Chlorothalonil;
• Endosulfan;
• Low Pressure Mercury;
• Multilamp

File

Download PDF

References

1. Korean J. Environ. Agric. v.14 Lee, S-R.;Kim, Y-H.;Lee, M-G.
2. 일본환경과학회 Fukuhara, T.;Nakano, S.
3. Chem. Rev. v.93 Legrini, O.;Oliveros, E.;Braun, A. M.
4. Wat. Environ. Res. v.65 Darby, J. L.;Snider, K. E.
5. J. of KSSE v.19 Kang, J-W.;Lee, K-H;Lee, M-J.
6. J. of Korean Ind & Eng. Chemistry v.8 Min, B-C;Kim, J-H;Kim, B-K.
7. J. of Korean Ind & Eng. Chemistry v.9 Kim, J-H.;Min, B-C.
8. Photocatalytic Purification and Treatment of Water and Air Al-Ekabi, H.;Butters, B.;Delany, D.(et al.);D. F. Ollis(ed.);H.Al-Ekabi(ed.)