Removal of Pb2+ and Cr3+ from aqueous solution by natural zeolites associated with eruptive rocks from the serra geral formation, Paraná sedimentary basin

Química Nova

Andrade, Sandra¹  Secretaria do Meio Ambiente do Estado de São Paulo, São Paulo, Brasil¹  Universidade de São Paulo, São Paulo, Brasil¹  Yamamoto, Jorge Kazuo¹  Shinzato, Mirian Chieko¹  Janasi, Valdecir de Assis¹  Universidade Federal de São Paulo, Diadema, Brasil¹  Montanheiro, Tarcísio José¹ 

关键词: natural zeolites;    adsorption;    heavy metals.;   

DOI  :  10.1590/S0100-40422009000800002

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The capacity of natural zeolites and its host rock (dacite) to remove Pb2+ and Cr3+ from aqueous solutions has been investigated. Results showed that both samples prefer to remove Pb2+ instead of Cr3+. Almost 100% of Pb2+ was removed from solutions with concentration until 50 mg L-1 and 100 mg L-1 of this metal, respectively by dacite and zeolite. The equilibrium of metals adsorption process was reached during the first 30 min by both materials. Na+ can be used to recover Pb2+, but not to remove Cr3+ from the treated samples. The Sips model showed a good fit for experimental data of this study.

【 授权许可】

Unknown