活化过硫酸钠高级氧化环境修复技术综述

A Review on Activated Sodium Persulfate Oxidation Technology

活化过硫酸钠(Na_2S_2O_8)高级氧化技术越来越多的应用于石油烃类、多环芳烃类等挥发性和半挥发性有机污染物的治理修复。一般而言,该技术在修复效果上有保证,修复的周期也相对较短。Na_2S_2O_8活化的方式主要包括热、光(紫外线UV)、过渡金属离子(Fe^(2+),Ag^+,Ce^(2+),Co^(2+)等)以及碱活化和碱热活化。从理论和实践上而言,采用生石灰进行碱热活化可能是目前最佳的活化方式。目前所开展的活化Na_2S_2O_8修复中,普遍存在过量加药和二次污染的问题。今后的研究重点,可向这2个领域倾斜,即研究如何在保证修复效果的前提下,最小化修复药剂的用量,以防止二次污染,并节约经济成本。

Activated persulfate advanced oxidation technology has been widely used for remediation of petroleum hydrocarbons, polycyclie aromatic hydrocarbons and other volatile or semi-volatile organic pollutants. In general, the effect of remediation by activated persulfate is guaranteed, and the remediation timeframe is relatively short. The activation methods include heat-activation, light （mostly UV） activation, transition metal ions （Fe^2＋,Ag^＋,Ce^2＋,Co^2＋, etc.） activation, alkali activation and alkali-heat activation. Based on theoretical analysis and practical experience, lime could be the best activator. Two major issues have been identified in the current application of activated persulfate remediation, including over-dosing and secondary pollution. Research in future could emphasize on these two areas, in order to minimize oxidation agents dosage, and to prevent secondary contamination. Key words： Sodium Persulfate; Activation; Advanced Oxidation; Remediation