Degradation of alachlor in aqueous solution by using hydrodynamic cavitation.
Degradation of alachlor in aqueous solution by using hydrodynamic cavitation.
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DOI：
10.1016/j.jhazmat.2008.03.073
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发表时间：
2009-01
影响因子：
13.6
通讯作者：
Xi-kui Wang;Yong Zhang
中科院分区：
文献类型：
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作者：
Xi-kui Wang;Yong Zhang
采用水力空化技术对甲草胺水溶液进行了降解研究。结果表明，旋转射流空化可以有效地去除水溶液中的甲草胺。降解过程符合准一级动力学，降解速率为4.90×10− 2 min −1。考察了压力、溶液温度、甲草胺初始浓度和介质pH等操作参数对甲草胺降解率的影响。结果表明，甲草胺的降解速率随压力的增大而增大，随初始浓度的增大而减小。甲草胺在40°C时降解速率最快，且降解速率对pH值有一定的依赖性。降解过程中形成了多种降解产物，并通过GC-MS对其进行了定性分析。
The degradation of alachlor aqueous solution by using hydrodynamic cavitation was systematically investigated. It was found that alachlor in aqueous solution can be deomposed with swirling jet-induced cavitation. The degradation can be described by a pseudo-first-order kinetics and the degradation rate was found to be 4.90×10−2min−1. The effects of operating parameters such as fluid pressure, solution temperature, initial concentration of alachlor and medium pH on the degradation rates of alachlor were also discussed. The results showed that the degradation rates of alachlor increased with increasing pressure and decreased with increasing initial concentration. An optimum temperature of 40°C existed for the degradation rate of alachlor and the degradation rate was also found to be slightly depend on medium pH. Many degradation products formed during the process, and some of them were qualitatively identified by GC–MS.