Surface area and porosity of the suitable adsorbent can significantly influence the adsorption capacity. In addition to that, temperature of the emulsion also plays a vital role in the overall adsorption process.

Good luck!

Dear Sir. Concerning your issue about the factors affecting on the removal efficiency of oil from emulsified oily waste water by adsorption (sorption) process . Emulsified oil in waste water constitutes is a severe problem in the different treatment stages before disposed off in a manner that does not violate environmental criteria. One commonly used technique for remediation of petroleum contaminated water is adsorption. The main objective of this study is to examine the removal of oil from oil–water emulsions by adsorption on bentonite, powdered activated carbon (PAC) and deposited carbon (DC). The results gave evidence of the ability of the adsorbents to adsorb oil and that the adsorptive property of the three adsorbents (bentonite, PAC, and DC) has been influenced by different factors. The effects of contact time, the weight of adsorbents and the concentration of adsorbate on the oil adsorption have been studied. Oil removal percentages increase with increasing contact time and the weight of adsorbents, and decrease with increasing the concentration of adsorbate. Equilibrium studies show that the Freunlich isotherm was the best fit isotherm for oil removal by bentonite, PAC, and DC. The data show higher adsorptive capacities by DC and bentonite compared to the PAC. I think the following below links may help you in your analysis:

https://ac.els-cdn.com/S1110062111000031/1-s2.0-S1110062111000031-main.pdf?_tid=4718f93b-f20a-4056-993b-f4d19c68ee55&acdnat=1525586456_87a0bdb848ef2feba829e3869366f89c

https://pubs.acs.org/doi/abs/10.1021/es020061s

http://www.jazanu.edu.sa/Administrations/sfc/Documents/sci/14340124/crude%20oil.pdf

https://pdfs.semanticscholar.org/02de/935cc233e0f5ee3104b6ecf0e8fe3e264b3f.pdf

Thanks

Chracteristic of sorbent (incl. Polarity/hydrophobicity, its charge) as well as droplets size and its size (in emulsion) and the charge of droplets. At end also composition of the matrix (pH, presence of organic solvents and surfactants).

regards

G