Examination of effects of Cu(II) and Cr(III) on Al(III) binding by dissolved organic matter using absorbance spectroscopy

Water Research
Mingquan YanGuodong Ji

Abstract

Effects of Cu(II) and Cr(III) ions on the binding of Al(III) onto Dissolved Organic Matter (DOM) exemplified by Suwannee River Humic Acid (SRHA) at pH 6.0 were quantified in this study using linear and log-transformed SRHA absorbance spectra acquired at varying Al(3+) concentrations and Cu(2+) or Cr(3+) levels. The competition between Al(3+) and Cu(2+)/Cr(3+) for the binding sites in DOM was ascertained by examining the intensity and shapes of the metal-specific differential spectra of DOM. The results indicated that the binding of Al(3+) onto SRHA is little influenced in the cases of in presence of 1.0 and 10.0 μM background Cr(3+) and in presence of 1.0 μM background Cu(2+), but it is significantly depressed in presence of 10.0 μM Cu(2+). Changes of the spectral slope of the log-transformed absorbance spectra in the 350-400 nm wavelength range (S350-400) were unambiguously correlated with the total amount of DOM-bound metals. The concentrations of Me-DOM complexes were determined using the NICA-Donnan Model. The results demonstrate that differential absorbance measurements provide quantitatively interpretable information concerning the nature and mechanisms of metal-DOM interactions and effects of metal cations competition on...Continue Reading

References

Sep 21, 2001·Environmental Science & Technology·A J PetersE Tipping
May 17, 2002·Nature·Sheila M Palmer, Charles T Driscoll
Sep 28, 2002·Science·Gerhard FurrerWilliam H Casey
Apr 2, 2003·Environmental Science & Technology·Christopher J MilneEdward Tipping
Dec 29, 2004·Journal of Inorganic Biochemistry·Jingyan Zhao, Donald J Nelson
Aug 15, 2006·Water Research·Mingquan YanHongxiao Tang
Apr 4, 1986·Science·D K Nordstrom, J W Ball
Nov 20, 2010·Environmental Science & Technology·Stephen E Cabaniss
Feb 1, 1995·Environmental Science & Technology·M F BenedettiL K Koopal
Jan 16, 2014·Environmental Science & Technology·Jon Petter GustafssonDan Berggren Kleja
Feb 20, 2014·Environmental Science & Technology·Mingquan Yan, Gregory V Korshin
Apr 22, 2015·Environmental Science & Technology·Yuan GaoGregory V Korshin

❮ Previous
Next ❯

Citations

Aug 10, 2018·Environmental Science. Processes & Impacts·Qianqian DongQinghui Huang
Dec 5, 2019·Environmental Science and Pollution Research International·Susan PraiseToru Watanabe
Jan 19, 2020·Environmental Science and Pollution Research International·Tingting LiYingchen Bai
Jan 13, 2021·Environmental Science and Pollution Research International·Xiang DingMi Zhou
Nov 6, 2018·Journal of Agricultural and Food Chemistry·Qiao XuJiyan Shi

❮ Previous
Next ❯

Related Concepts

Related Feeds

Blood Clotting Disorders

Thrombophilia includes conditions with increased tendency for excessive blood clotting. Blood clotting occurs when the body has insufficient amounts of specialized proteins that make blood clot and stop bleeding. Here is the latest research on blood clotting disorders.