Environmental Technology Division, Council of Scientific & Industrial Research (CSIR)-Central Leather Research Institute (CLRI), Adyar, Chennai, 600 020, Tamil Nadu, India,
Environ Sci Pollut Res Int. 2014 Jan;21(2):1489-502. doi: 10.1007/s11356-013-2024-z. Epub 2013 Aug 8.
The rice-husk-based mesoporous activated carbon (MAC) used in this study was precarbonized and activated using phosphoric acid. N2 adsorption/desorption isotherm, X-ray powder diffraction, electron spin resonance, X-ray photoelectron spectroscopy and scanning electron microscopy, transmission electron microscopy, (29)Si-NMR spectroscopy, and diffuse reflectance spectroscopy were used to characterize the MAC. The tannery wastewater carrying high total dissolved solids (TDS) discharged from leather industry lacks biodegradability despite the presence of dissolved protein. This paper demonstrates the application of free electron-rich MAC as heterogeneous catalyst along with Fenton reagent for the oxidation of persistence organic compounds in high TDS wastewater. The heterogeneous Fenton oxidation of the pretreated wastewater at optimum pH (3.5), H2O2 (4 mmol/L), FeSO4[Symbol: see text]7H2O (0.2 mmol/L), and time (4 h) removed chemical oxygen demand, biochemical oxygen demand, total organic carbon and dissolved protein by 86, 91, 83, and 90%, respectively.
本研究使用的基于稻壳的中孔活性炭（MAC）经过预碳化和磷酸活化。采用 N2 吸附/解吸等温线、X 射线粉末衍射、电子顺磁共振、X 射线光电子能谱和扫描电子显微镜、透射电子显微镜、（29）Si-NMR 光谱和漫反射光谱对 MAC 进行了表征。尽管皮革工业排放的制革废水中含有溶解蛋白，但由于其总溶解固体（TDS）含量高，缺乏生物降解性。本文展示了富自由电子的 MAC 作为非均相催化剂与 Fenton 试剂一起应用于高 TDS 废水中持久性有机化合物的氧化。预处理废水在最佳 pH 值（3.5）、H2O2（4 mmol/L）、FeSO4[Symbol: see text]7H2O（0.2 mmol/L）和时间（4 h）下的非均相 Fenton 氧化，分别去除了 86%、91%、83%和 90%的化学需氧量、生化需氧量、总有机碳和溶解蛋白。
