CAJ | 학술논문

以某化工厂排污沟渠中受六氯苯污染沉积物为对象,选用非离子表面活性剂OP-10为强化助剂,研究了电动力学修复后沉积物理化性质如pH、有机质含量、氧化还原电位、含水率和电导率变化情况.结果表明,电动力学处理13.5d后靠近阳极区域沉积物被酸化,而阴极区域被碱化;表面活性剂在沉积物上的吸附导致靠近阳极处有机质含量明显增加,其有机质含量最大增幅达到46%以上,而靠近阴极区域的有机质随电渗析流迁移使得其含量低于初始值;氧化还原电位与pH分布呈相反趋势;沉积物中含水率从阳极向阴极增大,靠近阴极处义降低;沉积物中大部分区域电导率值小于初始值.
이모화공엄배오구거중수륙록분오염침적물위대상,선용비리자표면활성제OP-10위강화조제,연구료전동역학수복후침적물이화성질여pH、유궤질함량、양화환원전위、함수솔화전도솔변화정황.결과표명,전동역학처리13.5d후고근양겁구역침적물피산화,이음겁구역피감화;표면활성제재침적물상적흡부도치고근양겁처유궤질함량명현증가,기유궤질함량최대증폭체도46%이상,이고근음겁구역적유궤질수전삼석류천이사득기함량저우초시치;양화환원전위여pH분포정상반추세;침적물중함수솔종양겁향음겁증대,고근음겁처의강저;침적물중대부분구역전도솔치소우초시치.
This paper presents a bench-scale electrokinetic setup used for lab examining of contaminated sediment re-mediation with respect to changes of pH value, organic content, redox potential, moisture and electrical conductivity of the sediments. Sediment, sampled from a chemical plant's effluent ditch, polluted mainly by hexachlorobenzene, was added with the nonionic surfactant OP-10 as an enhanced reagent. After the electro-kinetic remediation, it was found that the sediment was acidified adjacent to the anode and basified adjacent to the cathode. The organic content increased more than 46% close to the anode, compared with the initial level, due to adsorption of the surfactant onto the sediment, but de-creased close to the cathode due to the organic matter's migration with the electro-osmotic flow. Distribution of redox po-tential tended to a pattern in reverse of that of pH, moisture of the sediment tended to increase from the anode to cathode but declined near the cathode. In general, electrical conductivity of the sediment tended to decrease after the remediation of sediment.