State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
Bioresour Technol. 2014 Aug;166:178-86. doi: 10.1016/j.biortech.2014.05.056. Epub 2014 May 24.
Sewage sludge of biological wastewater treatment plant was converted into sewage sludge based activated carbon (SBAC) with ZnCl₂ as activation agent, which supported manganese and ferric oxides as catalysts (including SBAC) to improve the performance of ozonation of real biologically pretreated Lurgi coal gasification wastewater. The results indicated catalytic ozonation with the prepared catalysts significantly enhanced performance of pollutants removal and the treated wastewater was more biodegradable and less toxic than that in ozonation alone. On the basis of positive effect of higher pH and significant inhibition of radical scavengers in catalytic ozonation, it was deduced that the enhancement of catalytic activity was responsible for generating hydroxyl radicals and the possible reaction pathway was proposed. Moreover, the prepared catalysts showed superior stability and most of toxic and refractory compounds were eliminated at successive catalytic ozonation runs. Thus, the process with economical, efficient and sustainable advantages was beneficial to engineering application.
采用 ZnCl₂ 作为活化剂，将生物废水处理厂的污泥转化为基于污泥的活性炭 (SBAC)，并负载锰和氧化铁作为催化剂（包括 SBAC），以提高实际经生物预处理的鲁奇煤气化废水的臭氧氧化性能。结果表明，制备的催化剂的催化臭氧氧化显著提高了污染物去除性能，且处理后的废水的可生物降解性更高，毒性更低。基于催化臭氧氧化中较高 pH 值的积极影响和自由基清除剂的显著抑制作用，推断出催化活性的增强是产生羟基自由基的原因，并提出了可能的反应途径。此外，所制备的催化剂表现出优异的稳定性，并且在连续的催化臭氧氧化运行中消除了大部分有毒和难处理的化合物。因此，该具有经济、高效和可持续优势的工艺有利于工程应用。
