竹制活性炭自水溶液中吸附镧（Ⅲ）离子的研究

ADSORPTION OF LANTHANUM(Ⅲ)ION IN AQUEOUS SOLUTION BY ACTIVATED CARBON MADE FROM BAMBOO

以金竹（Ｐｈｙｌｌｏｓｔａｃｈｙｓｓｕｌｐｈｕｒｃａ（Ｃａｒｒ．）Ｒｉｖｉｅｒｅ）为原料，分别在富氧和贫氧条件下，采用化学法研制活性炭，并作吸附澜（Ⅲ）离子试验。发现富氧活性炭对镧（Ⅲ）离子的吸附量明显大于贫氧活性炭，且与溶液的ｐＨ密切相关；提出该活性炭吸附无机镧（Ⅲ）离子主要靠静电力，其吸附量取决于炭表面含氧基团的观点，认为富氧条件下研制活性炭是增大无机离子吸附量的重要方法。

Activated carbons were prepared from bamboo(e eyeeosteeeys suepeuree(Carr.)Riviere)bychemical method under conditions different in oxygen supply.Adsorption tests of Lanthanum(Ⅲ)ion bythese activated carbons were also made and compared. It was found that the adsorption of Lanthanum(Ⅲ)ion by activated carbon made with sufficient oxygen supply was much stronger than that with insuffi-cient supply of oxygen,and the pH value of the solution had a significant effect on the capacity of adsorp-tion。 It was suggested that the adsorption was due mainly to the static electric charge and the amount ad-sorbed was related principally to the content of oxygen containing groups on carbon surface.It was consid-ered that manufacture of activated carbon under conditions of sufficient oxygen supply is an important wayfor increasing adsorption of inorganic ions.