On the composition and properties of humic substances isolated from deep groundwater and surface waters
作者： C. Pettersson , J. Ephraim , B. Allard
DOI: 10.1016/0146-6380(94)90096-5
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摘要: Fulvic and humic acids were collected from groundwater surface waters by an isolation procedure utilizing DEAE-cellulose, a weak anion exchange resin. DEAE-cellulose was selected since it can adsorb himics without any pH adjustment of the sampled water (in range 4–8), thus making method well suited for substances in field. Characterization general parameters (elemental composition, molecular weight, acidity, absorptivity, 14C-age) performed on these as humics isolated other procedures. The weights divided into three categories basis calculated atomic ratios, absorptivity: (high weight) fulvic (low waters, respectively. similarities within each group, despite variations age origin, support contention that have more properties common than they differences.
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