+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Comparison of photochemical behavior of various humic substances in water; III, Spectroscopic properties of humic substances



Comparison of photochemical behavior of various humic substances in water; III, Spectroscopic properties of humic substances



Chemosphere 10(5): 479-486



Spectral absorption coefficients and fluorescence quantum efficiencies were determined for humic substances from a variety of sources. Specific absorption coefficients kh, for humic substances at wavelengths from 300 to 500 nm can be closely described by the relation AeB(450-), where A and B are constants. When the kh values are in units of liter (mg organic carbon)1meter1 and wavelength is in nanometers, mean values of A and B for aquatic humus in the 12 water bodies studied were 0.6±0.3 and 0.014±0.001, respectively. Spectral absorption coefficients of dissolved organic matter in blackwater rivers, of the “yellow substance” in the sea, and of fulvic acids extracted from soils are very similar. Fluorescence quantum yields of humic substances were low and more variable than the absorption coefficients, ranging from 0.0005 to 0.012 with excitation at 350 nm (average of 0.0045±0.0038 for 6 waters). Fluorescence spectra for the humic substances were remarkably similar with maximum emission at 430 to 470 nm. Results of this study can be used to compute photolysis rates of pollutants as a function of depth in natural water bodies.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 018592156

Download citation: RISBibTeXText

DOI: 10.1016/0045-6535(81)90148-x


Related references

Comparison of photochemical behavior of various humic substances in water: I. Sunlight induced reactions of aquatic pollutants photosensitized by humic substances. Chemosphere 10(1): 109-117, 1981

Comparison of photochemical behavior of various humic substances in water 1. sun light induced reactions of aquatic pollutants photo sensitized by humic substances. Chemosphere 10(1): 109-118, 1981

Humic-like substances of bacterial origin. I. Some aspects of the formation and nature of humic-like substances produced. II. Fractionation of the bacterial humic-like substances by gel filtration on sephadex gels. III. Production of humic-like substances by Pseudomonas acidovorans in media containing certain benzene derivatives. Acta Microbiologica Polonica 26(4): 377-386; 387-392; 393-401, 1977

Effects of humic substances on the bioconcentration of polycyclic aromatic hydrocarbons: Correlations with spectroscopic and chemical properties of humic substances. Environmental Toxicology and Chemistry 18(12): 2782-2788, 1999

Comparison of photochemical behavior of various humic substances in water 2. photo sensitized oxygenations. Chemosphere 10(1): 119-126, 1981

Humic substances: structures, properties and uses. Proceedings second Humic Substances Seminar held at the Northeastern University, Boston, Massachusetts, 27 March 1998. Humic substances: structures, properties and uses Proceedings second Humic Substances Seminar held at the Northeastern University, Boston, Massachusetts, 27 March 1998: x + 259 pp., 1998

Photogeneration of singlet oxygen by humic substances: comparison of humic substances of aquatic and terrestrial origin. Photochemical and Photobiological Sciences 3(3): 273-280, 2004

Solution thermochemistry of humic substances; acid-base equilibria of river water humic substances. ACS Symposium Series 93: 99-114, 1979

Marine humic substances; I, Isolation of humic substances of sea water with an effective adsorbent, adsorption resin GDX-102. Haiyang yu Huzhao = Oceanologia et Limnologia Sinica 13(4): 370-379, 1982

Capillary electrophoretic separation of humic substances using hydroxyethyl cellulose as a buffer additive and its application to characterization of humic substances in a river water sample. Analytical and Bioanalytical Chemistry 393(2): 761-766, 2009

Studies in seawater and lake water on interactions of trace metals with humic substances isolated from marine and estuarine sediments 1. characterization of humic substances. Marine Chemistry 15(3): 217-230, 1984

Humic-like substances from landfill leachates-characterization and comparison with terrestrial and aquatic humic substances. Science of the Total Environment 81 & 82: 343-352, 1989

Humic substances: versatile components of plants, soil and water. Proceedings of the Fourth Humic Substances Seminar held at Northeastern University, Boston, Massachusetts, USA, on 22-24 March 2000. Humic substances: versatile components of plants, soil and water Proceedings of the Fourth Humic Substances Seminar held at Northeastern University, Boston, Massachusetts, USA, on 22-24 March 2000: 341 pp., 2000

Speciation study of Cr(VI/III) reacting with humic substances and determination of local structure of Cr binding humic substances using XAFS spectroscopy. Geochemical Journal 46(5): 409-420, 2012

Studies on dissolved humic substances and the growth of phytoplankton: I. Humic substances in the waters of the Seta River and Lake Biwa. Japanese Journal of Limnology 54(2): 97-108, 1993