Work

Life cycle assessment, kinetic, and isothermic studies of grape stalks for Zn(II) biosorption: From waste to resource

Year: 2025

Type: article

Abstract: This study investigates the application of grape stalks, a byproduct of winemaking, as an effective biosorbent for removing zinc ions from water. The research addresses the challenges of heavy metal contamination while promoting sustainable waste management. Optimization of the biosorption process was conducted using a Box-Behnken design within the framework of Response Surface Methodology, focusing on the influence of variables such as biosorbent dosage, pH, contact time, and initial Zn(II) concentration. The experimental results demonstrated that optimal biosorption efficiency (up to 99.38 %) was achieved at pH 8 and higher dosages of biosorbent. Adsorption kinetics aligned closely with the pseudo-second-order model, suggesting chemisorption as the governing mechanism. The equilibrium data fits well with the Langmuir isotherm, revealing a maximum adsorption capacity of 238.1 mg/g. A Life Cycle Assessment highlighted the environmental trade-offs, favoring a scenario that balanced high Zn(II) removal efficiency with lower resource consumption. The findings demonstrate the viability of grape stalks as an eco-friendly and cost-effective solution for zinc ion remediation, supporting circular economy principles in the wine industry and promoting advancements in sustainable wastewater treatment .

Source: Process Safety and Environmental Protection

DOI: 10.1016/j.cherd.2025.03.031

Authors: Celia Sabando-Fraile, Marina Corral-Bobadilla, Rubén Lostado-Lorza, Fátima Somovilla-Gomez

Institution: Universidad de La Rioja

Language: English

Topic: Adsorption and biosorption for pollutant removal

Subfield: Water Science and Technology

Field: Environmental Science

Domain: Physical Sciences

SDGs: Clean water and sanitation, Responsible consumption and production

Open Access status: hybrid

Estimated APC paid: $3,500