Özet:

In this study, the usability of natural wastes as low cost adsorbents for the removal of Cu (II) ions from industrial waste water has been investigated. The adsorption capacities of different natural wastes such as banana, lemon and orange peel, tea waste and sawdust of walnut were evaluated by a series of batch sorption tests. The grinded materials were classified with respect to particle size within the range of 1~2 and 0.5~1 mm. And also, the prepared adsorbents were classified as untreated, treated with acid (0.6 M of C2H2O4) and treated with base (0.1 M of NaOH). The adsorption performances of prepared adsorbents for the sorption of Cu(II) ions were investigated by a series of batch sorption experiments. The effect of adsorbent type, modification method and adsorbent size on Cu(II) ion sorption capacities (Qe) of the prepared adsorbents have been investigated. According to the results obtained, it has been observed that the modification with basic solution, enhanced the sorption performance of the adsorbents and exhibited the highest removal percentage up to 95% with the sorption capacity (Qe) of 5 mg/g-adsorbent for both particle sizes of the base-modified sawdust of walnut. The equilibrium behaviour of Cu(II) sorption of base-modified sawdust of walnut was well defined by Freundlich Isotherms.

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