PMID: 16509337Mar 3, 2006Paper

Molecular and quantitative analysis of metal ion binding to humic acids from sewage sludge and sludge-amended soils by fluorescence spectroscopy

Environmental Science & Technology
César PlazaAlfredo Polo

Abstract

Humic acids (HAs) isolated from sewage sludge (SS) and control and SS-amended soils were characterized by fluorescence spectroscopy. The main feature of fluorescence spectra was a broad band with the maximum centered at excitation/emission wavelengths that were much shorter for SS-HA (340/438 nm) than for any soil HA (440/510 nm). Titration with Cu(II), Zn(II), Cd(II), and Pb(II) ions decreased fluorescence intensities of HAs. Titration data were fitted to a single-site fluorescence quenching model, and metal ion complexing capacities of each HA sample and stability constants of metal ion-HA complexes were calculated. The binding capacities of HAs and strengths of metal ion-HA complexes followed the order Pb(II) > Cu(II) > Cd(II) > Zn(II). With respect to the control soil HA, SS-HA, which showed the smallest contents of acidic functional groups and the lowest humification degree, was characterized by much smaller binding capacities and stability constants. The binding capacities and affinities of SS-amended soil HA were intermediate between those of native soil HA and SS-HA but closer to the former, thus suggesting a partial incorporation of HA fractions of SS into native soil HAs. These effects are expected to have a great imp...Continue Reading

References

Mar 26, 2004·Chemosphere·Maria Rosaria ProvenzanoNicola Senesi
Mar 4, 2005·Analytical and Bioanalytical Chemistry·E I BertonciniM E Mattiazzo

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Citations

Jul 18, 2012·Environmental Science and Pollution Research International·Rui LuHan-Qing Yu
Nov 6, 2012·TheScientificWorldJournal·Fengsong ZhangWei Li
Mar 21, 2012·Journal of Hazardous Materials·Jun WuPin-Jing He
Sep 12, 2015·Environmental Science & Technology·Chuanjia JiangHeileen Hsu-Kim
Nov 19, 2015·Environmental Science and Pollution Research International·Peng-Fei YanLi Liu
Sep 14, 2010·Environmental Pollution·D Fernández-CalviñoC Plaza
Aug 26, 2016·Environmental Science and Pollution Research International·En HeTao Ding
Aug 2, 2014·Environmental Science & Technology·Brett A PoulinGeorge R Aiken
Mar 18, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Patrycja Boguta, Zofia Sokołowska
Sep 6, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Marta RadaelliGabriele Capodaglio
Apr 30, 2019·International Journal of Analytical Chemistry·Sayed M SalehIbrahim A I Ali
Jun 24, 2019·Bulletin of Environmental Contamination and Toxicology·Yanxia LiBaiyang Hu
Aug 18, 2020·Environmental Science and Pollution Research International·Yasuaki NanayamaHideki Kuramitz

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