Effects of dissolved organic carbon on sorption of 3,4-dichloroaniline and 4-bromoaniline in a calcareous soil.
To evaluate the effects of dissolved organic carbon on sorption of 3,4-dichloroaniline (3,4-DCA) and 4-bromoaniline (4-BA) on soils, batch sorption experiments were carried out. The soil used was a typical calcareous soil from south-eastern Spain. Two different types of dissolved organic carbon were used, that is, dissolved organic carbon extracts from a commercial peat (DOC-PE) and high-purity tannic acid (DOC-TA). The experiments were carried out in a 0.01 M CaCl2 aqueous medium at 25 degrees C. The results obtained from the sorption experiments show that the presence of both DOC-PE and DOC-TA, over a concentration range of 15-100 mg l-1, produced in all cases, an increase in the amount of 3,4-DCA and 4-BA adsorbed on the soil studied.
González-Pradas
E
E
Department of Inorganic Chemistry, University of Almería, La Cañada de San Urbano s/n, Almería 04120, Spain.
Fernández-Pérez
M
M
Flores-Céspedes
F
F
Villafranca-Sánchez
M
M
Ureña-Amate
M D
MD
Socías-Viciana
M
M
Garrido-Herrera
F
F
D000327:Adsorption; D000814:Aniline Compounds / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid; D012987:Soil; D012989:Soil Pollutants; D013030:Spain; D013634:Tannins / Q000737:chemistry
D000814:Aniline Compounds; D012987:Soil; D012989:Soil Pollutants; D013634:Tannins; C023621:4-bromoaniline; C014464:3,4-dichloroaniline; D002244:Carbon