Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 400019, India.
J Hazard Mater. 2010 Jan 15;173(1-3):517-22. doi: 10.1016/j.jhazmat.2009.08.115. Epub 2009 Aug 31.
Due to increasing human requirements, newer chemical species are being observed in the effluent streams with higher loadings such that efficacy of conventional treatment techniques is decreased and a combination of advanced oxidation processes is implemented for enhanced treatment ability and better energy efficiency. In the present work, the efficacy of combination of sonochemistry and Fenton chemistry has been investigated for wastewater treatment considering p-nitrophenol as model pollutant at pilot scale operation. Degradation of p-nitrophenol has been investigated under various operating conditions based on the use of ultrasound, Fenton process, ultrasound and H(2)O(2), ultrasound and Fe, ultrasound and FeSO(4), ultrasound and conventional Fenton process and ultrasound and advanced Fenton process. Two different initial concentrations of 0.5 and 1% of p-nitrophenol have been used for the experiments. In conventional Fenton and advanced Fenton process, two loadings of FeSO(4) and Fe powder 0.5 and 1g/l and three ratios of FeSO(4):H(2)O(2) and Fe:H(2)O(2) (1:5, 1:7.5 and 1:10) were investigated respectively. In all the systems investigated, maximum extent of degradation (66.4%) was observed for 0.5% p-nitrophenol concentration (w/v) using a combination of ultrasound and advanced Fenton process. The novelty of the work is in terms of investigating the efficacies of combined advanced oxidation processes based on the use of cavitation and Fenton chemistry at pilot scale operation and tries to establish the missing design related information for large scale operation of wastewater treatment.
由于人类需求的不断增加，废水中出现了更多的新型化学物质，其负荷也更高，这使得传统处理技术的效果降低，因此需要采用多种高级氧化工艺进行组合，以提高处理能力和能源效率。在本工作中，以对硝基苯酚（p-NP）为模型污染物，在中试规模下考察了声化学与芬顿化学相结合处理废水的效果。根据超声、芬顿工艺、超声与 H2O2、超声与 Fe、超声与 FeSO4、超声与常规芬顿工艺和超声与高级芬顿工艺的使用情况，在不同的操作条件下考察了对硝基苯酚的降解情况。实验中使用了两种不同的初始浓度，即 0.5%和 1%的对硝基苯酚。在常规芬顿和高级芬顿工艺中，分别考察了 FeSO4和 Fe 粉的两种负载量（0.5 和 1g/L）以及 FeSO4:H2O2和 Fe:H2O2的三种比值（1:5、1:7.5 和 1:10）。在所研究的所有体系中，在 0.5%的对硝基苯酚浓度（w/v）下，采用超声与高级芬顿工艺相结合的方式，观察到最大的降解程度（66.4%）。本工作的新颖之处在于，考察了基于空化和芬顿化学的联合高级氧化工艺在中试规模下的效果，并尝试为废水处理的大规模运行建立缺失的设计相关信息。
