Photocatalytic degradation of palm oil mill secondary effluent in presence of zinc oxide nanoparticles

The Photocatalytic Activity of Green Zinc Oxide Nanoparticles in The Treatment of Aerobically Palm Oil Mill Effluent

“…The operation temperature was controlled at 25°C by recirculating cooling water through a water chiller. Prior to analysis, 5 mL of samples were collected every 10 minutes and separated for 20 minutes in a centrifuge (Gyrozen 1736R) at 8000 rpm at 4°C [4]. A similar procedure was followed for the photocatalytic performance of ZnO-CC NPs under various pH conditions (4, 6, and 8).…”

“…The colour intensity was measured using a DR6000 UV-Vis Laboratory Spectrophotometer (Hach) following the ADMI standard technique (programme: 97 Color ADMI 1 inch). The treated A-POME was added into COD digestion reagent vials before being further preheated using DRB200 (Hach, Germany) reactor for 2 h at 150°C [4,5]. The material was then cooled to room temperature and analyzed using a DR6000 Spectrophotometer.…”

“…Commonly, chemical methods are used for synthesizing nanoparticle, which requires a high amount of chemical, produce toxic by-products, and involves a complex reaction. In a previous study, they used PEG as a capping agent for ZnO photocatalysts to enhance photocatalytic degradation performance [4]. Puasa [4] reported that the elimination of conventional pollutants, including COD, BOD and colour in A-POME, showed a considerable improvement via photocatalytic treatment in the presence of ZnO-PEG.…”

“…In a previous study, they used PEG as a capping agent for ZnO photocatalysts to enhance photocatalytic degradation performance [4]. Puasa [4] reported that the elimination of conventional pollutants, including COD, BOD and colour in A-POME, showed a considerable improvement via photocatalytic treatment in the presence of ZnO-PEG. The synthesis of NPs from green raw material received much attention due to its therapeutic uses and environmental benefits over traditional chemical methods.…”

Enhancement of the adsorptive performance of TiO2 nanoparticles towards methylene blue by adding suspended nanoparticles of Pt: kinetics, isotherm, and thermodynamic studies

“…Meanwhile, various methods have been applied to treat industrial effluents. Photocatalytic degradation using metal oxide nanoparticles is commonly chosen for its simplicity, high yield, extensive range of applications, the low energy required, the kind condition of reaction, and neglected secondary contamination [6]. Titanium dioxide (TiO 2 ) nanoparticles (NPs) have been commonly used as a catalyst for the photodegradation of organic contaminants as a result of their stability, cheapness, non-toxicity, and availability [7].…”