Abstract:

The adsorbents from Jilin and LiaoHe oily sludge were prepared using different method and the adsorption characteristics were evaluated. The best preparation conditions for adsorbent JA from Jilin sludge are: addition of 0.5mol/L ZnCl2 activator, calcination temperature of 550℃ for 2h, while the adsorbent LA from LiaoHe sludge is obtained by direct pyrolysis at 650℃ for 2h. The surface morphologies of two adsorbents are relatively rough and have irregular porous structure with mainly in mesoporous. The iodine adsorption values of JA and LA are 451.22mg/g and 376.48mg/g, respectively. Oil removal rates of adsorbents prepared are superior to activated carbon. COD and oil contents in adsorption treated oilfield wastewater can meet the requirements of grade two of “The National Integrated Wastewater Discharge Standard” (GB8978-1996).

Key words: oily sludge, adsorbent, adsorption characteristic, adsorption capacity, resource utilization