Decontamination of alachlor herbicide wastewater by a continuous dosing mode ultrasound/Fe(2+)/H2O2 process.
Decontamination of alachlor herbicide wastewater by a continuous dosing mode ultrasound/Fe(2+)/H2O2 process.
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DOI：
10.1016/s1001-0742(13)60608-7
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发表时间：
2014-06
影响因子：
6.9
通讯作者：
Chikang Wang;Chun-hui Liu
中科院分区：
文献类型：
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作者：
Chikang Wang;Chun-hui Liu
采用超声波/Fe 2 +/H2 O2连续投加法降解甲草胺。实验结果表明，较低的pH值会促进甲草胺的降解和矿化。在pH = 3、超声功率为100 W、Fe 2+浓度为20 mg/L、H2 O2浓度为2 mg/min、反应温度为20°C的条件下，反应60 min内，甲草胺的最大降解率（初始甲草胺浓度为50 mg/L）高达100%，总有机碳去除率为46.8%。较高的反应温度会抑制甲草胺的降解。在超声/Fe 2 +/H2 O2工艺中，适量的Fe 2+和H2 O2不仅可以提高甲草胺的降解效率，而且比单独的超声或芬顿工艺节省运行成本。连续投加模式的超声波/Fe 2 +/H2 O2工艺被证明是降解甲草胺的有效方法。
We used a ultrasound/Fe2+/H2O2process in continuous dosing mode to degrade the alachlor. Experimental results indicated that lower pH levels enhanced the degradation and mineralization of alachlor. The maximum alachlor degradation (initial alachlor concentration of 50 mg/L) was as high as 100% at pH 3 with ultrasound of 100 Watts, 20 mg/L of Fe2+, 2 mg/min of H2O2and 20°C within 60 min reaction combined with 46.8% total organic carbon removal. Higher reaction temperatures inhibited the degradation of alachlor. Adequate dosages of Fe2+and H2O2in ultrasound/Fe2+/H2O2process not only enhance the degradation efficiency of alachlor but also save the operational cost than the sole ultrasound or Fenton process. A continuous dosing mode ultrasound/Fe2+/H2O2process was proven as an effective method to degrade the alachlor.