Abstract：In order to understand the effect of metal ions on distribution and adsorption of anthracene on soils (water/soil = 10), Fe3+, Cu2+, Zn2+ and Ca2+ were added in the colloid solution of contaminated kaolin to probe the varies of anthracene concentrations in supernatants after 180 r/min of shaking at 28℃. The adsorption equilibrium time and equilibrium concentration of Fe3+, Cu2+, Zn2+ and Ca2+ by kaolin were about 24 h and (20 ± 3) mg/g, respectively. When contents of metal ions added were more than 30 mg/g for kaolin, the lowest concentration of kaolin colloid was (40±3)mg/L in supernatant. The total colloid concentrations in supernatants increased from 52 mg/L to 133 mg/L for adding Fe3+, 52 mg/L to 110 mg/L for adding Cu2+ or Zn2+, and 52 mg/L to 73 mg/L for adding Ca2+, respectively. Meanwhile, the increasing trends of anthracene in the supernatants were similar to those of total colloid concentrations, which were from 30 ng/L to 73 ng/L for adding Fe3+, 28, 35ng/L to 65, 66 ng/L for adding Cu2+ or Zn2+, and 40 ng/L to 50 ng/L for adding Ca2+, respectively. Thus, the sequences of the increase of anthracene in supernatants were the same as those of the charge densities of metal ions (Fe3+ > Cu2+, Zn2+). However, adding Ca2+ at pH 6.5 only led to a minor increase of anthracene in supernatant.
俞晟, 邹鹏, 肖琳, 杨柳燕. 4种金属离子对高岭土胶体上蒽分布的影响[J]. 中国环境科学, 2009, 29(12): 1306-1311.
YU Sheng, ZOU Peng, XIAO Lin, YANG Liu-Yan. Effect of adding four metal ions on distribution of anthracene on kaolin colloid. . CHINA ENVIRONMENTAL SCIENCECE, 2009, 29(12): 1306-1311.
