Extraction and separation of nickel ions from wastewaters of oil factories using modified surfactant-containing MCM-41

In this work, nano adsorbent MCM-41, was synthesized by a rapid method and characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The surfactant-containing ordered mesoporous silica (MCM-41) was modified by a kind polyaminophenol. Then the modified surfactant-containing MCM-41 was used as an absorbent in batch solid phase extraction (SPE) to remove the nickel ions from wastewater samples of oil sites such as Ahwaz 2 and Maroon 2. The influences of the experimental parameters including pH of the solutions, amounts of nano modified adsorbent in extracting of nickel cations, and HCl concentration in the elution phase, was investigated and optimized. Finally, the optimized batch SPE was coupled by flame atomic absorption spectrometry (FAAS) for pre-concentration and determination of nickel ions in the wastewaters of oil factories.