Removal of COD from petroleum refinery wastewater by adsorption using activated carbon derived from avocado plant

• DOI: 10.1016/j.sajce.2024.03.015
• Publication Date: 2024-03-28T16:50:45Z
• Authors: Zainab Y. Atiyah; Shatha K. Muallah; Ali H. Abbar
• Keywords: Specific surface area; Refinery; Carbon fibers; Phosphoric acid

In the present work, removing of COD from wastewater generated via Al-Diwanya petroleum refinery plant located in Iraq by adsorption with activated carbon (AC) derived avocado seeds was successfully performed a two-step approach. first step, AC prepared impregnating H3PO4 at 400°C where effects concentration and calcination time on specific surface area were studied. Additionally, properties examined XRD, SEM, FTIR to knowledge features internal structure AC. Results showed that has mesopores pore diameters range between 30.07 50.8 µm. Increasing weight percent led an increase reach maximum value beyond which decrease happened further increasing percent. resulted happened. The best 436.6 m2/g obtained 70%H3PO4 4hrs. At second performance process evaluated studying three operating parameters, namely adsorbent dosage (1-5g/L), pH (3-9), shaking speed (100-400 rpm) removal COD(RE%) using response methodology (RSM). RE% while each lowering RE%. optimum conditions for higher 5 g/L, 3, 100 rpm efficiency 94.54% obtained. degradation found obey order kinetic confirming chemisorption is rate limiting step process.