Carbonyl and double bond indices values determined using FTIR from LDPE films before and after 126 days incubation in soil in various treatments.

CI carbonyl index, DBI double bond index, (Δ%) difference between carbonyl and double bond indices of films before and after 126 days of biodegradation (shown as a percentage). (SP: Soil + non-UV-irradiated PE; SUP: Soil + UV-irradiated PE; SMP: Soil + Selected Microorganisms + non-UV-irradiated PE; SMUP: Soil + Selected Microorganisms + UV-irradiated PE).