Sangami Sanjeev, Manu Basavaraju
Research scholar, Department of Civil Engineering, National Institute of Technology Karnataka, Surathkal, P.O. Srinivasnagar, Mangalore, DK 575025, India E-mail:
Water Sci Technol. 2017 Jan;75(2):451-461. doi: 10.2166/wst.2016.538.
This research was to study the efficiency of the Fenton's treatment process for the removal of three herbicides, namely 2,4-dichlorophenoxy acetic acid (2,4-D), ametryn and dicamba from the sugarcane field runoff water. The treatment process was designed with the Taguchi approach by varying the four factors such as HO/COD (1-3.5), HO/Fe (5-50), pH (2-5) and reaction time (30-240 min) as independent variables. Influence of these parameters on chemical oxygen demand (COD), ametryn, dicamba and 2,4-D removal efficiencies (dependent variables) were investigated by performing signal to noise ratio and other statistical analysis. The optimum conditions were found to be HO/COD: 2.125, HO/Fe: 27.5, pH: 3.5 and reaction time of 135 min for removal efficiencies of 100% for ametryn, 95.42% for dicamba, 88.2% for 2,4-D and with 75% of overall COD removal efficiencies. However, the percentage contribution of HO/COD ratio was observed to be significant among all four independent variables and were 44.16%, 67.57%, 51.85% and 50.66% for %COD, ametryn, dicamba and 2,4-D removal efficiencies, respectively. The maximum removal of herbicides was observed with the HO dosage of 5.44 mM and Fe dosage of 0.12 mM at pH 3.5.
本研究旨在探讨芬顿处理工艺对去除甘蔗田径流水中三种除草剂（即2,4-二氯苯氧乙酸（2,4-D）、莠灭净和麦草畏）的效率。该处理工艺采用田口方法设计，将四个因素作为自变量进行变化，即H₂O₂/COD（1 - 3.5）、H₂O₂/Fe（5 - 50）、pH值（2 - 5）和反应时间（30 - 240分钟）。通过进行信噪比和其他统计分析，研究了这些参数对化学需氧量（COD）、莠灭净、麦草畏和2,4-D去除效率（因变量）的影响。结果发现，最佳条件为H₂O₂/COD：2.125、H₂O₂/Fe：27.5、pH：3.5和反应时间135分钟，此时莠灭净的去除效率为100%，麦草畏为95.42%，2,4-D为88.2%，总体COD去除效率为75%。然而，在所有四个自变量中，H₂O₂/COD比例的贡献百分比在去除%COD、莠灭净、麦草畏和2,4-D效率方面分别为44.16%、67.57%、51.85%和50.66%，均较为显著。在pH 3.5时，H₂O₂剂量为5.44 mM和Fe剂量为0.12 mM时，除草剂的去除效果最佳。
