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首页> 外文期刊>RSC Advances >Remarkable lignin degradation in paper wastewaters over Fe2O3/γ-Al2O3 catalysts using the catalytic wet peroxide oxidation method
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Remarkable lignin degradation in paper wastewaters over Fe2O3/γ-Al2O3 catalysts using the catalytic wet peroxide oxidation method

机译：Fe 2 O 3 /γ-Al 2 O 3 催化剂对造纸废水中木质素的显着降解湿式过氧化物氧化法

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Heterogeneous catalytic wet peroxide oxidation (CWPO) has been found to be one of the most effective approaches for the degradation of toxic and paper factory wastewater. Fe2O3/γ-Al2O3 catalysts were prepared by an impregnation method and characterized by X-ray diffraction (XRD), temperature-programmed desorption (TPD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The catalytic activity of Fe2O3/γ-Al2O3 for the CWPO of lignin was assessed. The effects of initial solution pH, catalyst dosage, initial concentration of hydrogen peroxide, reaction temperature and initial concentration of lignin on the reactivity of the system were investigated. Higher lignin degradation can be achieved under not only under acidic but also neutral and slightly alkaline conditions. Under initial conditions of pH = 9, T = 348 K, 6 g L?1 catalyst, 6.396 mM hydrogen peroxide and 100 mg L?1 lignin, 87% lignin degradation and 86% total organic content (TOC) removal were achieved in 60 min. The negligible amount of leaching Fe ions found in solution was measured by inductively coupling plasma-atomic emission spectra (ICP-AES).
机译：已发现多相催化湿式过氧化物氧化（CWPO）是降解有毒和造纸厂废水的最有效方法之一。 Fe 2 O 3 /γ-Al 2 O 3 催化剂，并通过X射线衍射（XRD），程序升温脱附（TPD），透射电子显微镜（TEM）和扫描电子显微镜（SEM）。 Fe 2 O 3 /γ-Al 2 的催化活性评估了木质素的CWPO的> O 3 。研究了初始溶液的pH，催化剂用量，过氧化氢的初始浓度，反应温度和木质素的初始浓度对体系反应性的影响。不仅在酸性条件下，而且在中性和弱碱性条件下，都可以实现更高的木质素降解率。在初始pH = 9的条件下， T = 348 K，6 g L ？1 催化剂，6.396 mM过氧化氢和100 mg L < small> ？1 木质素在60分钟内达到了87％的木质素降解率和86％的总有机物含量（TOC）去除率。通过电感耦合等离子体原子发射光谱（ICP-AES）测量了溶液中微量的Fe离子浸出量。

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