Comparison of As, Ni, Zn, Cd, and Pb removals using treatment agents
- Comparison of As, Ni, Zn, Cd, and Pb removals using treatment agents
- 최재영; 양중석; 박영태; Jong-Oh Kim; Ki-Jun Kim; Yon-Sik Shim; Hyun-Ho Kwon; Moonis Ali Khan; Jae-Woo Park; Jeong-Gi Um; Byong-Hun Jeon
- Heavy metal; Adsorption; Precipitation; leaching
- Issue Date
- Environmental technology
- VOL 33, NO 4, 445-454
- The removal of heavy metals such as As, Ni, Zn, Cd, and Pb onto limestone, starfish, black shale, and concrete from wastewater was studied. These materials, with a high capacity for heavy metals, can be obtained and employed as alternative low-cost substitutes. Various parameters such as the neutralization capacity, changes in pH, redox potential (Eh), and electric conductivity (EC) as a function of time were quantified. Of the studied treatment agents, concrete showed high neutralization efficiency for acid mine drainage (AMD) and maintained a pH value above 11. The adsorption of heavy metals was influenced by the compositions of the treatment agents. The experimental results of leaching revealed no significant follow-up release from any of the treatment agents. The results suggest that concrete could be used successfully for the treatment of mixed metal-contaminated wastes.
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