Upcycled Coffee Waste as Sustainable Sorbents for Monitoring Organophosphorus Pesticides in Environmental Waters.

ABSTRACT: This study presents a solid-phase extraction (SPE) method using upcycled coffee waste, specifically acid-treated spent coffee grounds, as sustainable biosorbents for the LC-MS/MS determination of malathion, disulfoton, and chlorpyrifos in environmental waters. Eight coffee-derived materials produced through distinct chemical and thermal pretreatments were fully characterized by FTIR, SEM, TGA, BET, and zeta potential analyses. Acid-treated spent coffee grounds were identified as the most efficient sorbent and subsequently optimized using a 2^5-1 fractional factorial design. The optimized conditions (conditioning pH 3.0, sample pH 3.0, 25 mg of sorbent, 10 mL of sample, and 0.5 mL of eluent) provided wide linear ranges (5.0-250.0 μg L^-1 for malathion; 25.0-250.0 μg L

SUBMITTER: de Souza SA 

PROVIDER: S-EPMC12809546 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature