Snythesis of xanthate for the Stabilization of copper ion

• Main Authors: Xu, You-Ming, 許祐銘
• Other Authors: Zhang, Zu-En
• Format: Others
• Language: zh-TW
• Published: 1998
• Online Access: http://ndltd.ncl.edu.tw/handle/88175990774755129815

碩士 === 國立成功大學 === 環境工程學研究所 === 86 === To understand the stability of copper xanthate complexes, four xanthates, KEtX, KBuX, starch xanthate, and cellulose xanthate were synthesized to react with copper ions in this study. XRD, SEM, and element analyzer were first employed to identify the characteristics of the xanthates synthesized. Four leaching test procedures, including the Toxicity Characteristics Leaching Procedure (TCLP), the Japanese Leaching Tests (JLT), the Semi-dynamic Leaching Tests (SDLT), and the Immobile Impregnate Leaching Test (IILT) were combined with analytical techniques, including XRD, FTIR, SEM, and UV-VIS to evaluate the stability of the Cu-xanthate complexes.Experimental results showed that different crystalline phases were found for the four xanthates synthesized/commercial and were analogous to xanthate, indicating that the synthesis of xanthate was successful. The results of TCLP and JLT showed that the leaching concentrations of copper from the four copper xanthates complexes were below the regulated standards. The results from SDLT and IILT showed that both Cu-BuX and Cu-EtX were more stable than two other complexes and the total amount of copper leached from 60-cycle SDLT for Cu-BuX and Cu-EtX were 0.003% and 0.82%, respectively. Both Cu-BuX and Cu-EtX complexes analyzed by XRD and FTIR showed that the crystalline phase and functional group of the complexes have no change after the leaching cycle, inferring that the stability of solid phase may be attributed to the presence of the Cu-Xanthate complexes. However, CS2 and dixanthogen may be observed from the UV-spectra of the solutions released fromcopper xanthate complexes, the results of this study showed that both of synthesized KEtX and KBuX can be applied to treat copper ion-bearing wastewater.