期刊
ENVIRONMENTAL GEOLOGY
卷 57, 期 8, 页码 1847-1853出版社
SPRINGER
DOI: 10.1007/s00254-008-1472-0
关键词
Soil contamination; Insolubilized humic acid; Modification; Adsorption; p-Nitrophenol; Isothermal curve
资金
- Natural Science Foundation of Gansu Province in People's Republic China [3ZS041-A25-027]
- Educational Bureau of Gansu Province [0501-07]
Insolubilized humic acid (IHA) was prepared in the laboratory by heating approach. Through the comparison between the endothermic peaks, optimal heating temperature was determined to be 330A degrees C. The modified IHA then was characterized by TG-DTA, SEM, FTIR, element analysis, and nitrogen adsorption-desorption isotherms. The removal efficiency of p-nitrophenol from the aqueous solution by adsorption onto solid IHA surfaces was shown to be a function of pH, reaction temperature, and p-nitrophenol concentration. Adsorption equilibrium data satisfactorily fitted the Langmuir adsorption isotherm. Under a certain concentration range, the removal rate of p-nitrophenol at pH 3.5 could reach 24, 29, and 35 mg/g at a temperature of 25, 35, and 45 +/- 0.1A degrees C. The results suggest that IHA could play a role as a potential efficient absorbent to remove organic contaminants, e.g., utilized to purify water contaminated by organic compounds.
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