The Remediation Characteristics of Heavy Metals (Copper and Lead) on Applying Recycled Food Waste Ash and Electrokinetic Remediation Techniques

Applied Sciences

Ji-Sun Kim¹  Sounghyun Lee¹  Gigwon Hong²  Dongchan Kim³  Jung-Mann Yun⁴  Jong-Young Lee⁵  Jung-Geun Han⁵ 

[1] Department of Civil Engineering, Chung-Ang University, Seoul 06974, Korea;Department of Civil and Disaster Prevention Engineering, Halla University, Wonju-si 26404, Korea;Department of Geotechnical Engineering Research, Korea Institute of Civil Engineering and Building Technology, Ilsan 10223, Korea;Department of Smart Civil Engineering, ShinAnsan University, Ansan 15435, Korea;School of Civil and Environmental Engineering, Urban Design and Study, Chung-Ang University, Seoul 06974, Korea;

关键词: electrokonetic (EK);    electrode exchange;    remediation;    PRB;    heavy metals;   

DOI  :  10.3390/app11167437

来源: DOAJ

【 摘 要 】

Most food waste is incinerated and reclaimed in Korea. Due to the development of industry, soil and groundwater pollution are serious. The purpose of this study was to study recycled materials and eco-friendly remediation methods to prevent secondary pollution after remediation. In this study, recycled food waste ash was filled in a permeable reactive barrier (PRB) and used as a heavy metal adsorption material. In situ remediation electrokinetic techniques (EK) and acetic acid were used. Electrokinetic remediation is a technology that can remove various polluted soils and pollutants, and is an economical and highly useful remediation technique. Thereafter, the current density increased constantly over time, and it was confirmed that it increased after electrode exchange and then decreased. Based on this result, the acetic acid was constantly injected and it was reconfirmed through the water content after the end of the experiment. In the case of both heavy metals, the removal efficiency was good after 10 days of operation and 8 days after electrode exchange, but, in the case of lead, it was confirmed that experiments are needed by increasing the operation date before electrode exchange. It was confirmed that the copper removal rate was about 74% to 87%, and the lead removal rate was about 11% to 43%. After the end of the experiment, a low pH was confirmed at x/L = 0.9, and it was also confirmed that there was no precipitation of heavy metals and there was a smooth movement by the enhancer and electrolysis after electrode exchange.

【 授权许可】

Unknown