Treatment of Au(Ⅱ), Ag(Ⅰ), Cu(Ⅱ), Ni(Ⅱ) from Electroplating Wastewater by Laminaria japonica: biosorption,desorption and recycling
The pretreated brown algae Laminaria japonica was used to adsorb and desorb Au2+, Ag+, Cu2+and Ni2+ions from electroplating wastewater in this article. The results indicated that the biosorption process of Au2+, Ag+, Cu2+and Ni2+ions could be divided into two steps. The first step was physical adsorption and reached equilibrium quickly, in less than 15 min. This adsorption process followed the pseudo-second order model well. The desorption process of Au2+, Ag+, Cu2+and Ni2+ions was similar to the adsorption process using this pretreated algae biosorbent. So as the desoption process also followed the pseudosecond order model well. We used HCl as the elution in the desorption experiment. The results showed that using HCl as the elution not only had a good desorption capacity of heavy metals ions, and the brown algae still had a certain desorption capacity after repeatly adsorption-desorption for 3 times. Although existing the impact of environmental conditions, the biosorption capacities could also reach above 75% basically in the field experiment. Laminaria japonica can be used as an efficient biosorbent material for the removal and recovery of heavy metal ions from electroplating wastewater.
Lin Li He Yuan Tian Chunyu Wang Xian Wang Liyi
College of Oceanography and Environmental Science Xiamen University Xiamen, China
国际会议
成都
英文
1-5
2010-06-18（万方平台首次上网日期，不代表论文的发表时间）