Study On The Effect Of Surfactants On The Adsorption Of Aromatic Compounds

In this article, NDA-150 and XAD-4 resin were chosen as adsorbents, aromatic compounds(naphthalene, aniline) and surfactant(PEG-6000, LAS) were chosen as adsorbates. The adsorption behavior of single contaminant on resin was studied under different initial conditions( initial dosage, pH, reaction time, temperature), and as a basis to study the adsorption of binary coexist under combined pollution contaminants aromatic compounds on the resin. Explored the mutual influence of the adsorption law combined pollution case between various pollutants. Conclusions of this study were as follows:(1) The adsorption process of PEG and naphthalene and LAS on NDA-150 resin fits well with the Freundlich isotherm, adsorption process of aniline on NDA-150 resin fits well with the Langmuir isotherm. Besides the adsorption process of PEG, aniline and LAS on XAD-4 resin fits well with the Langmuir isotherm, adsorption process of aniline on XAD-4 resin fits well with the Freundlich isotherm. However, equilibrium adsorption amount of the NDA-150 resin is higher than the amount of equilibrium adsorption of contaminants on XAD-4 resin.(2) Adsorption thermodynamics and adsorption kinetics study shows that the process of the three substances adsorbed on the two resins is an exothermic spontaneous and orderly direction towards adsorption. The adsorption rate on the NDA-150 resin is slower than the adsorption rate on XAD-4 resin. Proposed second-order equation can be well simulated with the three substances adsorption on the resins.(3) Under the condition of combined pollution, NDA-150 resin adsorption process of naphthalene and XAD-4 resin adsorption of naphthalene and aniline are fit well with the Freundlich equation, and the adsorption of aniline on NDA-150 resin fits well with the Langmuir equation. And both resin adsorption of naphthalene and aniline belong preferential adsorption process.(4) Adsorption of aniline for PEG-coexist on the resin system shows that the existence of PEG is conducive to two kinds of resin adsorption of aniline. Adsorption of naphthalene for PEG- coexist on the resin system shows that the existence of PEG is not conducive to two kinds of resin adsorption of naphthalene.(5) Adsorption thermodynamics studies of combined pollution show that the adsorption of naphthalene and aniline on both resin adsorption enthalpy ΔH<0, indicates that the two-component resin adsorption process is exothermic. ?G<0, indicates that adsorption can occur spontaneously. ?S<0, indicates that adsorption occurs toward the orderly direction.