Feng Qingge, Lin Qingyu, Gong Fuzhong, Sugita Shuichi, Shoya Masami
Graduate School of Civil Engineering, Hachinohe Institute of Technology, 88-1, Myo, Hachinohe 031-8501, Japan.
J Colloid Interface Sci. 2004 Oct 1;278(1):1-8. doi: 10.1016/j.jcis.2004.05.030.
An attempt at the use of rice husk ash, an agricultural waste, as an adsorbent for the adsorption of lead and mercury from aqueous water is studied. Studies are carried out as a function of contact times, ionic strength, particle size, and pH. Rice husk ash is found to be a suitable adsorbent for the adsorption of lead and mercury ions. The Bangham equation can be used to express the mechanism for adsorption of lead and mercury ions by rice husk ash. Its adsorption capability and adsorption rate are considerably higher and faster for lead ions than for mercury ions. The finer the rice husk ash particles used, the higher the pH of the solution and the lower the concentration of the supporting electrolyte, potassium nitrate solution, the more lead and mercury ions absorbed on rice husk ash. Equilibrium data obtained have been found to fit both the Langmuir and Freundlich adsorption isotherms.
研究了尝试将农业废弃物稻壳灰用作从水溶液中吸附铅和汞的吸附剂。研究是作为接触时间、离子强度、粒径和pH值的函数进行的。发现稻壳灰是吸附铅和汞离子的合适吸附剂。Bangham方程可用于表达稻壳灰吸附铅和汞离子的机理。其对铅离子的吸附能力和吸附速率比对汞离子的要高得多且快得多。所用稻壳灰颗粒越细、溶液的pH值越高以及支持电解质硝酸钾溶液的浓度越低，稻壳灰吸附的铅和汞离子就越多。已发现获得的平衡数据符合Langmuir和Freundlich吸附等温线。
