 |
 |
 |
 |
 |
Technology and Engineering
- ISSN: 2333-2581
- Modern Environmental Science and Engineering
Decontamination of Alachlor by Continuously Dosed Sono-Fenton Process: Effects of System Parameters and Kinetics Study
Chikang Wang1, Chien-Wei Hou2, and Chunghan Liu1
1. Department of Environmental Engineering and Health, Yuanpei University of Medical Technology, Taiwan
2. Department of Biotechnology and Pharmaceutical Technology, Yuanpei University of Medical Technology, Taiwan
Abstract: This present work reports a continuous dosing sono-Fenton process that can degrade alachlor and reduce its toxicity. Experimental results indicate that lower pH levels were favorable in enhancing alachlor decontamination; the maximum efficiency was as high as 100% at a pH of 3. The decontamination efficiency of alachlor increased as the Fe2+ and H2O2 dosages increased; the best result was found at 30 mg/L of Fe2+ and 120 mg/L of H2O2. The sono-Fenton process was more efficient for alachlor decontamination than either a Fenton process or ultrasound alone, which indicated that combining the ultrasound and Fenton process enhanced the decontamination of alachlor. The toxicity, which was defined by cell viability, decreased after the sono-Fenton process treatment. In conclusion, the continuous sono-Fenton process can effectively decontaminate alachlor with an extremely short reaction time, and the treated wastewater could be passed through a biological treatment unit for further treatment.
Key words: alachlor; cell viability; continuous dosing; decontamination; sono-Fenton process.
