Removal of copper and nickel ions from aqueous solutions by grape stalks wastes

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• 作者：Villaescusa ; Isabel ; Fiol ; Nú ; ria ; Martí ; nez ; Marí ; a ; Miralles ; Nú ; ria ; et. al.
• 关键词：Grape stalks wastes ; Copper ; Nickel ; Metal removal ; Sorption isotherms
• 刊名：Water Research
• 出版年：2004
• 期刊代码：57_00431354
• 类别：civ
• 出版时间：February, 2004
• 卷：38
• 期：4
• 页码：992-1002
• 文件大小：378 K

摘要

In the present work, the usefulness of grape stalks wastes generated in the wine production process has been investigated for the removal of copper and nickel ions from aqueous solutions. The sorption process was relatively fast and equilibrium was reached after about 60min of contact. The influence of pH, sodium chloride and metal concentration on metal removal has been studied. Uptake showed a pH-dependent profile. Maximum sorption for both metals was found to occur at around pH 5.5–6.0. An increase of sodium chloride concentration caused a decrease in metal removal. Langmuir isotherms, at pH 6.0, for each metal were used to describe sorption equilibrium data. Maximum uptake obtained was 1.59×10⁻⁴mol of copper and 1.81×10⁻⁴mol of nickel per gram of dry sorbent.