One gram of the zeolite ZSM-5 (raw or zinc-reinforced) was wrapped in a customisable sachet of ultra-fine polyester mesh (~3-micron pores), acquired from JoTech Ltd©, Warwickshire (UK). The mesh enveloping the zeolite was used to create what is termed herein as the 'drum' (extraction device), and was employed in every treatment involving either of the zeolite forms. The drum was tethered to a scaffold that enabled it to be submerged in 300 ml of the experimental medium per beaker. Beakers were clingfilmed to control evaporation and 4-ml pipettes were respectively used to penetrate the respective beakers through the resealable cling film, where the medium was pipettepumped multiple times every sampling time (see below) to homogenise the solution and mimic semi-stagnant water conditions; then the beakers were resealed accordingly.