Removal of sulfonamides in water using an electro/peroxydisulfate system catalyzed with activated carbon

• Autorzy: Wu N. , Tan Y. , Qian H. , Wang Y.
• Języki publikacji: EN

Abstrakty

EN

Sulfonamides are frequently detected in surface water and groundwater, which have the characteristics of low concentration, high toxicity, and being difficult to remove. In this study, an electro/peroxydisulfate system catalyzed with activated carbon (EC/AC/PS) was used to treat sulfamethoxazole (SMX). The results showed that the removal efficiency of SMX was 88.5% by the EC/AC/PS system. An increase of SMX concentration led to a decrease of SMX degradation efficiency, followed by an increase of intermediate products. Acidic conditions improved the degradation of SMX with optimum pH value of 5. A separate increase of AC concentration, PS concentration, and current density would enhance the degradation efficiency of SMX. But the extent was limited when reaching a certain level. There was an optimum plate spacing of 9 cm for SMX degradation efficiency. After repeating the use of AC 4 times, the removal efficiency of SMX still exceeded 80%. The free radical experiments showed that SO₄ •- played a leading role. The benzene ring structure of SMX was gradually decomposed with reaction. According to data analysis, the reaction kinetic model was Ct = C₀ exp(-1.100×10-3[AC]⁰‧⁴⁴⁷¹ [PS]⁰‧⁶³⁹⁷ [current density]⁰‧⁵⁶⁵⁸ [plate spacing]⁰‧⁸⁴⁰⁵t). This study implied that the EC/AC/PS process could effectively remove sulfonamide antibiotics in water, which was an environmentally friendly treatment method.

• Wydawca: -
• Czasopismo: Polish Journal of Environmental Studies
• Rocznik: 2019
• Tom: 28
• Numer: 3
• Opis fizyczny: p.1957-1965,fig.,ref.

Twórcy

autor

Wu N.

• School of Municipal and Environmental Engineering, Shenyang Jianzhu University, Shenyang, China

autor

Tan Y.

• School of Municipal and Environmental Engineering, Shenyang Jianzhu University, Shenyang, China

autor

Qian H.

• School of Municipal and Environmental Engineering, Shenyang Jianzhu University, Shenyang, China

autor

Wang Y.

• China Energy Engineering Corporation Limited, Liaoning Institute, Shenyang, China

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Identyfikatory

DOI

10.15244/pjoes/89542