ADSORPTIVE REMOVAL OF AS(V) FROM AQUEOUS SOLUTION BY ZR(IV)-LOADED SKIN SHAVINGS

作者：Jiao Limin; Liao Xuepin^*; Shi Bi

来源：Journal of the American Leather Chemists Association, 2009, 104(9): 308-315.

Wet-white shavings are one of the main solid wastes produced in the leather industry. In this paper, Zirconium (IV)-loaded adsorbent (ZrLA) was prepared by using wet-white shavings as the supporting matrix. The fundamental adsorption behaviors of this new adsorbent for arsenic [As(V)] were investigated. It was found that the adsorption capacity of ZrLA for As(V) in aqueous solution was 60.90 mg.g(-1), when the initial concentration of As(V) was 75.0 mg.L(-1) at pH 4.0 and the dosage of ZrLA was 1.0 g.L(-1). The initial pH of As(V) solution significantly affected adsorption capacity of ZrLA to As(V) and the optimal pH for adsorption was in the range of 3.0-6.0. The adsorption isotherms of As(V) could be well fitted by the Langmuir equation, and the maximum adsorption capacities calculated by the Langmuir equation were close to those determined by experiments. The adsorption kinetics of As(V) on ZrLA could be satisfactorily described by the pseudo-second-order rate model. The adsorption capacity was increased with the increase of the zirconium content in ZrLA, and the highest adsorption capacity was obtained when zirconium content of ZrLA was 90-110 mg.g(-1).

• 出版日期2009-9
• 单位四川大学