Behavior of TOC and Color in the Presence of Iron-Modified Activated Carbon in Methyl Methacrylate Wastewater in Batch and Column Systems

作者：Tatiana Almazan Sanchez Perla; Castaneda Juarez Monserrat; Martinez Miranda Veronica; Jose Solache Rios Marcos; Lugo Lugo Violeta; Linares Hernandez Ivonne^*

来源：Water, Air, and Soil Pollution, 2015, 226(3): 72.

DOI：10.1007/s11270-015-2302-0

• Methyl methacrylate
• Batch adsorption
• Bed column
• Iron-modified activated carbon

Natural (AC-N) and electrochemical iron-modified activated carbon (AC-Fe-2.5A) were applied to treat wastewater with organic by-products generated by the manufacture of acrylic resins from methyl methacrylate (MMA) using batch and column systems. MMA wastewater has an extremely complex composition with a chemical oxygen demand concentration of 651.25 g O-2/L, total organic carbon (TOC) concentration of 227.86 g/L, NH4+ concentration of 62.74 g/L, and 352,500 PtCo units. Wastewater was distilled to decrease the ammonium concentration with a removal efficiency of ammonium of 52 %. Then, Fenton oxidation was applied in order to promote the partial oxidation of organic matter; the molar dosage of Fe2+/H2O2 was 0.018/5.700 at pH 5.3. After distillation and oxidation processes, batch experiments using natural and iron-modified activated carbon were carried out in order to determinate the adsorption equilibrium time and capacities. The global removal percentages of TOC by oxidation-adsorption treatment were the highest at pH 2, 21.09 and 29.46 % for AC-N and AC-Fe-2.5A, respectively, and for color were most efficient at pH 4, 80.62 and 72.55 % for AC-N and AC-Fe-2.5A, respectively. The results showed that AC-Fe-2.5A was more efficient than AC-N for the removal of TOC. The electrochemical modification improves the adsorption capacities and properties of activated carbon.

• 出版日期2015-3