Sustainable Exploitation of Coffee Silverskin in Water Remediation

Sustainability

Emilia Paone¹  Giuseppe Panzera¹  Patrizia Frontera¹  Angela Malara¹  Francesco Mauriello¹  Lucio Bonaccorsi¹ 

[1] Dipartimento di Ingegneria Civile, dell’Energia, dell’Ambiente e dei Materiali, Università “Mediterranea”, 89122 Reggio Calabria, Italy;

关键词: potential toxic metals;    coffee waste;    coffee silverskin;    spent coffee grounds;    metal adsorption;    remediation;    Langmuir and Freundlich isotherm models;    wastewater;   

DOI  :  10.3390/su10103547

来源: DOAJ

【 摘 要 】

Coffee silverskin (CS), the main solid waste produced from the coffee industry, has efficiently been used as adsorbent material to remove potential toxic metals (PTMs). In order to assess its suitability in water remediation, kinetic adsorption experiments of Cu2+, Zn2+, and Ni2+ ions from wastewater were carried out and the adsorption performance of the waste material was compared with that of another well-known waste from coffee industry, spent coffee grounds (SCG). By using CS as sorbent material, ion removal follows the order Cu2+ > Zn2+ > Ni2+ with the adsorption equilibrium occurring after about 20 min. The adsorption efficiency of Ni2+ ions is the same for both investigated materials, while Cu2+ and Zn2+ ions are removed to a lesser extent by using CS. Equilibrium-adsorption data were analyzed using two different isotherm models (Langmuir and Freundlich), demonstrating that monolayer-type adsorption occurs on both CS and SCG surfaces. The overall results support the use of coffee silverskin as a new inexpensive adsorbent material for PTMs from wastewater.

【 授权许可】

Unknown