2.1. Chemicals
Di(2-ethylhexyl) terephthalate (DEHTP, CAS: 6422-86-2, Purity > 98%) was purchased from Adamas (Swiss). The stock solutions were prepared with 1% dimethyl sulfoxide (DMSO, Amresco, USA) in sterile K-medium (0.051 M NaCl and 0.032 M KCl) (Yu et al., 2022). The stock solutions were maintained at 4 °C until use.