Chitosan microspheres crosslinked with tripolyphosphate used for the removal of the acidity, iron (III) and manganese (II) in water contaminated in coal mining

Química Nova

Benassi, Jean C.¹  Laus, Rogério¹  Martins, Amarildo O.¹  Pedrosa, Rozângela C.¹  Universidade Federal de Santa Catarina, Florianópolis¹  Geremias, Reginaldo¹  Universidade do Extremo Sul Catarinense, Criciúma¹  Fávere, Valfredo T.¹  Laranjeira, Mauro C. M.¹ 

关键词: chitosan-tripolyphosphate;    microspheres;    remediation.;   

DOI  :  10.1590/S0100-40422006000100008

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

Considerable attention has been paid to chitosan and derivatives as efficient adsorbents of pollutants such as metal ions and dyes in aqueous medium. Nevertheless, no report can be found on the remedial actions of chitosan microspheres crosslinked with tripolyphosphate to control acidity, iron (III) and manganese (II) contents in wastewaters from coal mining. In this work, chitosan microspheres crosslinked with tripolyphosphate were used for the neutralization of acidity and removal of Fe (III) and Mn (II) from coal mining wastewaters. The study involved static and dinamic methods. The neutralization capacity of the surface of the static system was 395 mmol of H3O+ per kilogram of microspheres, higher than that of the dynamic one (223 mmol kg-1). The removal of Fe(III) in wastewater was of 100% and that of Mn(II) was 90%.

【 授权许可】

Unknown