CAJ | 학술논문

焦化场地土壤多环芳烃（PAHs）污染严重，目前的修复技术都存在不同程度的弊端。通过研究化学氧化、电动及其联合技术对焦化场地高浓度多环芳烃污染土壤的修复效果，比较了两种技术组合方式对修复效果的影响。结果表明，单一技术及联合技术对焦化场地 PAHs 均有一定的去除效果。在单一技术处理中，电动处理、芬顿和活化过硫酸钠对多环芳烃的去除率分别为24.86豫、10.27豫和22.19豫；在联合技术处理中，活化过硫酸钠-电动组合、电动-活化过硫酸钠组合、芬顿-电动组合和电动-芬顿组合对多环芳烃的去除率分别为49.65豫、41.73豫、36.72豫和31.39豫。电动-化学氧化联合技术对 PAHs 的去除效果较单一技术提高了6.53豫~27.46豫。两种技术的组合方式及氧化剂类型均对联合处理效果产生影响，化学氧化-电动处理的多环芳烃去除率较电动-化学氧化处理高5.33豫~7.92豫，其差异主要由化学氧化去除率差异所引起；应用活化过硫酸钠试剂的组合对多环芳烃的去除率高出应用芬顿试剂的组合12.93豫~10.34豫。经联合处理后，污染物的残留量及毒性当量浓度均有不同程度降低，说明电动-化学氧化联合技术是一种有效的预处理方法。
초화장지토양다배방경（PAHs）오염엄중，목전적수복기술도존재불동정도적폐단。통과연구화학양화、전동급기연합기술대초화장지고농도다배방경오염토양적수복효과，비교료량충기술조합방식대수복효과적영향。결과표명，단일기술급연합기술대초화장지 PAHs 균유일정적거제효과。재단일기술처리중，전동처리、분돈화활화과류산납대다배방경적거제솔분별위24.86예、10.27예화22.19예；재연합기술처리중，활화과류산납-전동조합、전동-활화과류산납조합、분돈-전동조합화전동-분돈조합대다배방경적거제솔분별위49.65예、41.73예、36.72예화31.39예。전동-화학양화연합기술대 PAHs 적거제효과교단일기술제고료6.53예~27.46예。량충기술적조합방식급양화제류형균대연합처리효과산생영향，화학양화-전동처리적다배방경거제솔교전동-화학양화처리고5.33예~7.92예，기차이주요유화학양화거제솔차이소인기；응용활화과류산납시제적조합대다배방경적거제솔고출응용분돈시제적조합12.93예~10.34예。경연합처리후，오염물적잔류량급독성당량농도균유불동정도강저，설명전동-화학양화연합기술시일충유효적예처리방법。
Soils at coking sites have been heavily contaminated with PAHs. Currently there is lack of effective remediation techniques for PAHs-contaminated soils. In this study, the efficiencies of chemical oxidation and electrokinetics and their integration for remediating PAHs heavily contaminated soils from coking sites were evaluated in a laboratory-scale experiment. Removal rates of PAHs were 24.86%, 10.27%and 22.19%, respectively, in treatments of electrokinetics, Fenton and activated persulfate. However, higher removal rates of PAHs were achieved for activated persulfate-electrokinetics, electrokinetics-activated persulfate, Fenton-electrokinetics and electrokinetics-Fenton, which were 49.65%, 41.73%, 36.72% and 31.39%, respectively. Integrating electrokinetics and chemical oxidation further enhanced the re-moval rate of PAHs by 6.53%~27.46% compared to electrokinetics or chemical oxidation alone. The sequence of applying electrokinetics and chemical oxidants and oxidant types impacted on the PAHs removal efficiency. Chemical oxidation-electrokinetics removed 5.33%~7.92% more PAHs than electrokinetics-chemical oxidation did. Applying activated persulfate increased PAHs removal by 12.93%~10.34%compared to using Fenton. These results show that integration of electrokinetics and chemical oxidation could be a promising pre-treatment technique to remove the PAHs in highly contaminated soils efficiently and to alleviate the residual toxicity.