Malik Sameena N, Ghosh Prakash C, Vaidya Atul N, Waindeskar Vishal, Das Sera, Mudliar Sandeep N
CSIR - National Environmental & Engineering Research Institute, Nehru Marg, Nagpur, Maharashtra, India E-mail:
Department of Energy Science & Engineering, Indian Institute of Technology, Bombay, Maharashtra, India.
Water Sci Technol. 2017 Sep;76(5-6):1001-1010. doi: 10.2166/wst.2017.062.
In this study, the comparative performance of coagulation, ozone, coagulation + ozone + coagulation and potassium ferrate processes to remove chemical oxygen demand (COD), color, and toxicity from a highly polluted textile wastewater were evaluated. Experimental results showed that ferrate alone had no effect on COD, color and toxicity removal. Whereas, in combination with FeSO, it has shown the highest removal efficiency of 96.5%, 83% and 75% for respective parameters at the optimal dose of 40 mgL + 3 ml FeSO (1 M) in comparison with other processes. A seed germination test using seeds of Spinach (Spinacia oleracea) also indicated that ferrate was more effective in removing toxicity from contaminated textile wastewater. Potassium ferrate also produces less sludge with maximum contaminant removal, thereby making the process more economically feasible. Fourier transform infrared spectroscopy (FTIR) analysis also shows the cleavage of the chromophore group and degradation of textile wastewater during chemical and oxidation treatment processes.
在本研究中，评估了混凝、臭氧、混凝+臭氧+混凝以及高铁酸钾工艺从高污染纺织废水中去除化学需氧量（COD）、色度和毒性的比较性能。实验结果表明，单独的高铁酸盐对COD、色度和毒性去除没有效果。然而，与硫酸亚铁（FeSO）联合使用时，在40mg/L + 3ml FeSO（1M）的最佳剂量下，与其他工艺相比，其对各参数的去除效率最高，分别为96.5%、83%和75%。使用菠菜（Spinacia oleracea）种子进行的种子发芽试验也表明，高铁酸盐在去除受污染纺织废水的毒性方面更有效。高铁酸钾在最大程度去除污染物的同时产生的污泥较少，从而使该工艺在经济上更可行。傅里叶变换红外光谱（FTIR）分析还表明，在化学和氧化处理过程中，发色基团发生裂解，纺织废水被降解。
