Reduction of Cu+2 and Ni+2 Ions from Wastewater Using Mesoporous Adsorbent: Effect of Treated Wastewater on Corrosion Behavior of Steel Pipelines | ||
| Egyptian Journal of Chemistry | ||
| Article 3, Volume 62, Issue 9, September 2019, Pages 1587-1602 PDF (2.15 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejchem.2019.7967.1627 | ||
| Authors | ||
| Mohamed Shehata1; Shaymaa El-Shafey* 2; Nabila A. Ammar3; Ashraf M El-Shamy4 | ||
| 1Physical chemistry department, electrochemistyr and corrosion lab., National research center Dokki, Cairo Egypt | ||
| 2Physical chemistry department, Surface and Catalysis lab., National Research Center, Dokki, Giza, egypt. | ||
| 3Water Pollution Control Department, National Research Center, Dokki, Cairo, Egypt | ||
| 4Physical chemistry department Electrochemistry lab., National Research Centre, Dokki, Giza, Egypt, | ||
| Abstract | ||
| Large amounts of highly heavy metals contaminated wastewater effluents are produced through the metal finishing and electroplating processes. In this study, mesoporous zeolite was prepared from Egyptian bentonite by alkali-hydrothermal method.The prepared zeolite was characterized by XRD technique showing the formation of crystalline phases corresponded to the zeolite structure. The adsorption performance of zeolite toward removal of copper (Cu+2) and nickel (Ni+2) ions was studied in relation to effect of contact time, concentrations of metal ions and the dose of adsorbent. The effect of Cu+2 and Ni+2 ions in treated wastewater on the corrosion behavior of steel pipelines was demonstrated. Elovich, Pseudo-first-order and Pseudo-second order kinetic models were applied. Kinetics models revealed that the adsorption of both Cu+2 and Ni+2on zeolite was controlled by pseudo-second order kinetic and the equilibrium achieved at 90 minutes. Langmuir, Freundlich and Dubinin–Kaganer–Radushkevich isotherms were investigated and the results showed that the adsorption of both cations well-satisfied with Langmuir model. The free energy (E) was 10.66 and 8.772 kJ/mol for the adsorption of Cu+2 and Ni+2 ions, respectively, confirming that the adsorption is a physical process.The effect of Cu+2 and Ni+2 on the corrosion behavior of steel pipelines revealed that the corrosion resistance of steel for treated anduntreated water is almost the same. | ||
| Keywords | ||
| Zeolite; Copper and Nickel; Isotherm; Kinetics; Corrosion | ||
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