摘要
采用电动方法对镍污染砂土的修复进行了实验室研究。实验研究了镍污染砂土电动修复的可行性,电极位置加入不同的控制液对镍污染砂土修复效率的影响,以及镍的迁移和分布规律。结果表明,在阴极喷洒单一的控制液乙酸、EDTA和柠檬酸后可提高砂土中镍的迁移率,但是完全迁移到电极位置的镍的含量很低,分别仅占砂土中镍的总含量的6%、9%和46%。以NaOH和乙酸同时作为电极控制液,可明显提高镍迁移到电极位置的浓度,迁移到电极位置的镍的质量分别达到了砂土中镍的总质量的64%和73%,提高了砂土修复效率,为回收土壤中的镍和净化被污染土壤提供了有利条件。
This paper presents the experimental study on the electrokinetic remediation of nickel-polluted soil at the laboratory. The remediation feasibility of nickel-polluted soil by clectrokinetic technology was investigated, mainly aiming at the effects of different added solutions that sprayed nearby the cathode and anode on the remediation efficiency, as well as the migration and distribution of nickel in the soil environment. The results showed that the mobility of nickel could be enhanced, but the concentrations of nickel around the electrode still appeared to be very low, only occupying 6%, 9% and 46%, respectively if acetic acid, EDTA and citric acid were individually added into the cathode. However, the migration of nickel could tremendously be strengthened towards the electrode when the mixed solution of NaOH and acetic acid was added to both the anode and cathode, respectively. In meantime, 64%and73% of the total nickel residues could be accumulated nearby the electrodes, which created an available condition for the further recovery and cleanup of nickel from the remedial soil.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2008年第6期2195-2199,共5页
Journal of Agro-Environment Science
基金
甘肃省自然科学基金资助项目(3ZS061-A25-025)
关键词
镍
土壤污染
电动修复
添加液
nickel
soil pollution
electrokinetic remediation
added solutions
