Asorption of arsenic (V) by crosslinked iron-III-chitosan

Química Nova

Fagundes, Tathyane¹  Universidade do Vale do Itajaí, Itajaí, Brasil¹  Rodrigues, Clóvis Antonio¹  Bachmann, Amanda Wolff Ledra¹  Tomaz, Heloísa Sonálio Overrath¹ 

关键词: crosslinked iron(III)-;    chitosan;    arsenate;    adsorption.;   

DOI  :  10.1590/S0100-40422008000600006

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The removal of As(V) by a crosslinked iron(III)-chitosan adsorbent was evaluated under various conditions. The adsorption capacity of CH-FeCL was around 54 mg/g of As(V). The kinetics of adsorption obeys a pseudo-first-order model with rate constants equal to 0.022, 0.028, and 0.033 min-1 at 15, 25 and 35 ºC respectively. Adsorption data were well described by the Langmuir model, although they could be modeled also by the Langmuir-Freundlich equation. The maximum adsorption capacity, calculated with the Langmuir model, was 127 mg g-1 of As(V). The inhibition by competing anions is dependant on their kind and valence.

【 授权许可】

Unknown