Thermal paper as a potential source of bisphenol A for humans and the environment: migration and ecotoxicological impact.

The objective of this work was to evaluate thermal paper (TP) tickets used in Argentina as a potential source of bisphenol A (BPA) that could impact humans and the environment. BPA in TP was measured by HPLC ranging from 11.1 to 30.

Fatty acid extraction from sewage sludge using a porous polyethylene sorbent obtained from agricultural covers.

Fatty acids from a sewage sludge of a wastewater treatment plant were extracted using a porous polyethylene (pPE) material prepared using agricultural plastic films. The pPE fatty acid extraction profile and yield from the sewage sludge was compared to toluene as extraction solvent. The chemical composition of the extracted fatty acids were the same in both cases, but when the extraction yield was normalized by the used mass of pPE or toluene, pPE resulted six times more efficient than toluene.