Different Parameters Effect on Photoelectrocatalysis for Organic Pollutants Removal from Gasfield Wastewater

Document Type : Research Paper

Authors

1 Environment and Biotechnology Research Division, Research Institute of Petroleum Industry (RIPI), Tehran, Iran

2 Nanotechnology Research Center, Research Institute of Petroleum Industry (RIPI), Tehran, Iran

3 Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Iran

Abstract

In this study, after separating oil and grease from gasfield produced water, removal of organic pollutants has been investigated to reduce its chemical oxygen demand (COD) from 9500 mg/L to the limits of agriculture irrigation. Since the initial electrical conductivity of the wastewater was too high (6300 µS/cm), evaporation process was used to decrease its dissolved solids content. As results of evaporation, electrical conductivity and COD have been reduced to 1100 µS/cm and 750 mg/L respectively. Afterwards, photoelectrocatalysis as an advanced oxidation process was applied to treat distilled wastewater from evaporation step because of COD content of less than 1000 mg/L. In the photoelectrocatalytic method, “boron carbon nitrite nanomaterial” was used as photocatalyst in a coil type microreactor with surface-to-volume ratio of about 3000 m2/m3, which it causes in rapid oxidation of organics. After fabricating the microreactor, the effect of different parameters on COD removal has been investigated. It has been found out that optimum conditions to remove of 80% COD are accordance with pH = 3, potential difference 20 V and electrical conductivity of 2500 µS/cm, so that COD is reached about 150 mg/L which is suitable for agricultural irrigation.
 

Keywords

References

[1]. Ying X, Danni Sh, Bin D, Xiaohu D (2016) A new strategy for reusing the oilfield-produced water as boiler feedwater without desilication, Journal of the Taiwan Institute of Chemical Engineers, 68: 169-172.##
[2]. Ahmaduna FR, Pendashteha A, Abdullaha LC, Biaka DRA, Madaenic SS, Abidin ZZ (2009) Review of technologies for oil and gas produced water treatment, Journal of hazardous materials, 170: 530–551. ##
[3]. Mokhatab S (2016) Handbook of natural gas transmission and processing, 4th ed., Elsevier, 2006. ##
[4]. Golestanbagh M, Parvini M, Pendashteh A (2016) Integrated systems for oilfield produced water treatment: The state of the art, Energy Sources, 38, 22: 3404-3411. ##
[5]. Fakharian H, Ganji H, Naderifar A (2017) Desalination of high salinity produced water using natural gas hydrate, Journal of the Taiwan Institute of Chemical Engineers, 72: 157-162. ##
[6]. Tellez GT, Nirmalakhandan N, Gardea-Torresdey JL (2002) Performance evaluation of an activated sludge system for removing petroleum hydrocarbons from oilfield produced water, Advances in Environmental Research, 6: 455–470. ##
[7]. Ebenezer T, Chen Z (2012) Produced water treatment technologies, International Journal of Low-Carbon Technologies, 9, 3: 157-177. ##
[8]. El-Ashtoukhy ESZ, El-Taweel YA, Abdelwahab O, Nassef EM (2013) Treatment of petrochemical wastewater containing phenolic compounds by electrocoagulation using a fixed bed electrochemical reactor, International Journal of Electrochemical Science, 8: 1534-1550. ##
[9]. Zanoni MVB, Sene JJ, Anderson MA (2003) Photoelectrocatalytic degradation of Remazol Brilliant Orange 3R on titanium dioxide thin-film electrodes, Journal of Photochemistry and Photobiology A: chemistry, 157, 1: 55-63. ##
[10]. Tavakoli P, Shahdizadeh SR, Hayati F, Fattahi M (2020) Effects of synthesized nanoparticles and Henna-Tragacanth solutions on oil/water interfacial tension: Nanofluids stability considerations, Petroleum, 6, 3: 293-303. ##
[11]. Guiying L, Taicheng A, Jiaxin C, Guoying S, Jiamo F, Fanzhong C, Shanqing Z, Huijun Z (2006) Photo electrocatalytic decontamination of oilfield produced wastewater containing refractory organic pollutants in the presence of high concentration of chloride ions, Journal of Hazardous Materials, B138: 392–400.
[12]. Jaramillo-Gutiérreza MI, Riverob EP, Cruz-Díazb MR, Pedraza-Avellaa JA (2016) Photoelectrocatalytic hydrogen production from oilfield-produced wastewater in a filter-press reactor using TiO2-based photoanodes, Catalysis Today, 266: 17-26. ##
[13]. Vinodgopal K, Bedja I, Kamat PV (1996) Nanostructured semiconductor films for photocatalysis. photoelectrochemical behavior of SnO2/TiO2 composite systems and its role in photocatalytic degradation of a textile azo dye, Chemistry of Materials, 8, 8: 2180-2187. ##
[14]. Suhadolnik L, Pohar A, Likozar B, Čeh M (2016) Mechanism and kinetics of phenol photocatalytic, electrocatalytic and photoelectrocatalytic degradation in a TiO2-nanotube fixed-bed microreactor, Chemical Engineering Journal, 303: 292-301. ##
Journal of Petroleum Research
Volume 30, 99-4 - Serial Number 113
November and December 2021
Pages 27-36

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