Sponge-like polysiloxane-graphene oxide gel as a highly efficient and renewable adsorbent for lead and cadmium metals removal from wastewater

摘要: Abstract Low cost, high adsorptivity, fast regeneration and excellent reusability are strongly recommended for a qualified adsorbent used in removing heavy metals from practical wastewater. A sponge-like polysiloxane-graphene oxide (PS-GO) gel lead cadmium wastewater has been prepared by simple one-step sol-gel method. The maximum sorption capacity of Pb(II) achieves as 256 mg/g. PS-GO exhibits an because its remarkable mechanical strength highly efficient desorption/regeneration. In the static treatment process, after five cycles, actual industrial effluent at 3.225 mg/L could be reduced to below 0.01 mg/L, still holding over 99% removal efficiency. Significantly, dynamic process using fixed-bed column packed with gel, volume is 720 bed (BV) (8143 mL) 480 BV (5429 mL) Cd(II) producing only 11.31 mL eluent each cycle. It should stressed that situ operationally feasible technology advantage “zero” amount sludge. This work taken key step closer based on adsorption large scale.