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

Quimica nova

Laus, Rogério¹  Martins, Amarildo O.¹  Benassi, Jean C.¹  Pedrosa, Rozângela C.¹  Laranjeira, Mauro C. M.¹  Fávere, Valfredo T.¹  Geremias, Reginaldo² 

[1] Universidade Federal de Santa Catarina, Florianópolis;Universidade do Extremo Sul Catarinense, Criciúma

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 attentionhas been paid to chitosan and derivatives as efficient adsorbents of pollutantssuch as metal ions and dyes in aqueous medium. Nevertheless, no report can befound on the remedial actions of chitosan microspheres crosslinked with tripolyphosphateto control acidity, iron (III) and manganese (II) contents in wastewaters fromcoal mining. In this work, chitosan microspheres crosslinked with tripolyphosphatewere 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 mmolof H3O+ per kilogram of microspheres, higher than thatof the dynamic one (223 mmol kg-1). The removal of Fe(III) in wastewaterwas of 100% and that of Mn(II) was 90%.

【 授权许可】

CC BY