Spectral Approach to Binding between Metals and Dissolved Organic Matter from a Biological Wastewater Treatment Plant
The interactions between three metals (Cu2+,Fe3+ and Al3+) and dissolved organic matter (DOM) from the effluent of the secondary sedimentation tank of wastewater treatment plant were investigated using three-dimensional excitation-emission matrix (EEM) fluorescence quenching coupled with self-weighted alternating tfilinear decomposition (SWATLD) analysis.Two main components in the DOM were identified by the EEM analysis:proteins at Ex/Em (230-235/345-350) nm and humic-like substances at Ex/Em (340-350/425-430) nm.The conditional stability constant (log Kc) was calculated to evaluate the metal complexing properties of DOM by Ryan-Weber Model.The two components in DOM were strong ligands for the three metals based on the conditional stability constants,with an order of Cu2+>Al3+>Fe3+.Results indicated that the DOM played an important role in the environmental behavior of metals.
Dissolved organic matter (DOM) Excitation-emission matrix (EEM) fluorescence spectroscopy Metal binding Self-weighted alternating trilinear decomposition (SWATLD)
Juan XU Guoping Sheng
School of Earth and Space Sciences,University of Science & Technology of China,Hefei 230026,China Department of Chemistry,University of Science & Technology of China,Hefei 230026,China
国际会议
the 16th Meeting of the International Humic Substances Society (第十六届国际腐殖物质学会大会(IHSS 16))
杭州
英文
533-534
2012-09-09（万方平台首次上网日期，不代表论文的发表时间）