全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
环境科学  2004 

Comparison on Desorptive Behavior of Copper in Phaeozem and Burozem
重金属铜在黑土和棕壤中解吸行为的比较

Keywords: Cu2+,desorption,thermodynamic process,kinetic process,phaeozem,burozem
Cu2+
,解吸,热力学,动力学,黑土,棕壤

Full-Text   Cite this paper   Add to My Lib

Abstract:

Desorptive behavior of Cu2+ from phaeozem and burozem was studied and compared using the batch method. The results indicated that Cu2+ desorbed from phaeozem tested had a longer lag period than that from burozem. When adsorbed Cu2+ for phaeozem was lower than 729.00 mg·kg-1 (Cu2+ concentration was lower than 40 mg·L-1), and on burozem was lower than 393.29 mg·kg-1 (Cu2+ concentration was lower than 20 mg·L-1), adsorbed Cu2+ was hardly desorbed. Meanwhile, the desorption ratio of Cu2+ from the two soils were both low, especially for phaeozem. In the range of Cu2+ concentration used in the experiments, the desorption rate maximums of Cu2+ for phaeozem and burozem were respectively 6.60% and 13.56%. Freundlich equation could best describe desorption isotherm processes of Cu2+ from the two soils. Adsorbed Cu2+ on soils was desorbed so fast from phaeozem and burozem that the desorption equilibrium could be reached only after 40 min desorption. The best model to describe Cu2+ desorption kinetics was two-constant equations, followed by the Elovich equation.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133