Photocatalytic treatment of palm oil mill effluent by visible light-active calcium ferrite: Effects of catalyst preparation technique.

J Environ Manage

Faculty of Chemical & Natural Resources Engineering, Universiti Malaysia Pahang, Lebuhraya Tun Razak, 26300, Gambang Kuantan, Pahang, Malaysia; Centre of Excellence for Advanced Research in Fluid Flow (CARIFF), Universiti Malaysia Pahang, Lebuhraya Tun Razak, 26300, Gambang Kuantan, Pahang, Malaysia. Electronic address:

Published: March 2019

Palm oil mill effluent (POME) is a serious and expensive environmental problem in Malaysia. In this paper, CaFeO is introduced as a novel photocatalyst for the degradation of POME under visible light irradiation. Two synthesis routes, auto-combustion and co-precipitation, and two calcination temperatures 550 °C and 700 °C were used to produce four CaFeO catalysts AC550, AC700, CP550 and CP700. CP550 exhibited the greatest photocatalytic degradation at 56% chemical-oxygen-demand (COD) removal after 8 h of irradiation which dropped to 49% after three consecutive cycles indicating reasonable conversion and high recyclability. BET analysis indicated CP550 had the highest S (27.28 m/g) and pore volume (0.077 cm/g) which dropped precipitously for CP700 upon increasing the calcination temperature to an S of 9.73 m/g and pore volume of 0.025 cm/g due to annealing which created a smoother surface area as evidenced by the SEM images. UV-Vis DRS indicated CP550 had the highest band-gap (1.52 eV) which is likely due to the presence of a highly crystalline pure CaFeO phase compared to the other products which existed as a mixture of Fe oxidation states evidenced by the XRD data. The PL spectra for all catalysts indicated significantly lower recombination rate for both CP550 and CP700. Introduction of IPA into the reaction mixture to eliminate hydroxyl radicals resulted in a diminishing of COD removal from 56% to 7% proving hydroxyl radicals to be the primary reactive species responsible for photodegradation of POME.

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.jenvman.2019.01.024DOI Listing

Publication Analysis

Top Keywords

palm oil
8
oil mill
8
mill effluent
8
cp550 cp700
8
cod removal
8
indicated cp550
8
cp550 highest
8
pore volume
8
hydroxyl radicals
8
cp550
5

Similar Publications

Feeding pigs lipids containing high levels of lipid oxidation products (LOP) has been shown to reduce growth performance, but data is lacking on quantitative relationships between LOP and pig growth, feed intake and feed efficiency. Four experiments (EXP) were conducted using soybean oil (SO) in EXP 1, 2, and 3, as well as SO, choice white grease (CWG) and palm oil (PO) in EXP 4, to evaluate the impact of feeding diets containing different amounts of LOP on pig performance. Lipid peroxidation was carried out using variable heating temperatures and durations to generate lipids with a broad range of peroxide (PV, mEq) and anisidine value (AnV, unitless).

View Article and Find Full Text PDF

Improving CO Removal Efficiency with Bio-Cellulose Acetate: A Multi-Stage Membrane Separation Approach.

Polymers (Basel)

January 2025

Biomass and Oil Palm Research Center of Excellence, Walailak University, Thasala, Nakhon Si Thammarat 80160, Thailand.

In this comprehensive investigation, the sustainable production and utilization of gas separation membranes derived from coconut water (CW) waste was investigated. The research focuses on the synthesis of bacterial cellulose (BC) and cellulose acetate (CA) membranes from CW, followed by a thorough analysis of their characteristics, including morphology, ATR-FTIR spectroscopy, tensile strength, and chemical composition. The study rigorously evaluates membrane performance, with particular emphasis on CO/CH selectivity under various operational conditions, including pressure, membrane thickness, and number of stages.

View Article and Find Full Text PDF

This research examines the possibility of palm oil and oil palm trunk biochar (OPTB) from pyrolysis effectively serving as alternative processing oils and fillers, substituting petroleum-based counterparts in natural rubber (NR) composites. Chemical, elemental, surface and morphological analyses were used to characterize both carbon black (CB) and OPTB, by using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) gas porosimetry, and scanning electron microscopy (SEM). The influences of OPTB contents from 0 to 100 parts per hundred rubber (phr) on thermal, dielectric, dynamic mechanical, and cure characteristics, and the key mechanical properties of particulate NR-composites were investigated.

View Article and Find Full Text PDF

Edible oils and ghee are vital parts of our daily culinary practices. In recent years, owing to heightened demand in the domestic and global markets, consistent reports regarding the adulteration of edible oils and ghee with substandard ingredients have been reported. Adulteration in edible oils is widespread, with distinctive contaminants, including cottonseed, mineral, and lower-cost oils like palm olein.

View Article and Find Full Text PDF

Producing homogeneous planting material in oil palm poses a significant challenge, which can be addressed through somatic embryogenesis. This study successfully achieved somatic embryogenesis using immature male inflorescence from Tenera hybrid. Modified Eeuwens medium yielded better results than the Murashige and Skoog (MS) and CHU (N6) media when supplemented with 2,4-D, picloram and α-naphthaleneacetic acid (NAA).

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!