Use of factorial planning in developing a methodology for galvanic zinc residue extraction

Química Nova

Olivier, Samantha¹  Silva, José Edson da¹  Motta, Maurício da¹  Universidade Federal de Pernambuco, Recife, Brasil¹  Silva, Valdinete Lins da¹ 

关键词: electroplating;    galvanic sludge;    zinc.;   

DOI  :  10.1590/S0100-40422007000700043

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The plating process generates solid waste rich in heavy metals and aiming to reduce environmental impact of such waste, this work suggests a methodology for zinc reduction, through a 24 factorial planning, studying the influence of the following variables: acid concentration (15, 20 or 30% v/v), acid type (sulfuric or hydrochloric), acid volume (15, 20 or 25 mL) and extraction time (12, 24 or 36 h). Through this methodology it is possible to establish the optimal conditions (15 mL of a 30% hydrochloric acid concentration during 12 h) to get a 100% efficiency in zinc extraction.

【 授权许可】

Unknown