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Sun J, Shi S, Zheng J, Zheng X, Xu X, Liu K, Wei P, Chen Q, Liu F, Zhao C, Zhang X. An immobilized composite microbial material combined with slow release agents enhances oil-contaminated groundwater remediation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 919:170762. [PMID: 38340862 DOI: 10.1016/j.scitotenv.2024.170762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 12/05/2023] [Accepted: 02/04/2024] [Indexed: 02/12/2024]
Abstract
Microbial remediation of oil-contaminated groundwater is often limited by the low temperature and lack of nutrients in the groundwater environment, resulting in low degradation efficiency and a short duration of effectiveness. In order to overcome this problem, an immobilized composite microbial material and two types of slow release agents (SRA) were creatively prepared. Three oil-degrading bacteria, Serratia marcescens X, Serratia sp. BZ-L I1 and Klebsiella pneumoniae M3, were isolated from oil-contaminated groundwater, enriched and compounded, after which the biodegradation rate of the Venezuelan crude oil and diesel in groundwater at 15 °C reached 63 % and 79 %, respectively. The composite microbial agent was immobilized on a mixed material of silver nitrate-modified zeolite and activated carbon with a mass ratio of 1:5, which achieved excellent oil adsorption and water permeability performance. The slow release processes of spherical and tablet SRAs (SSRA, TSRA) all fit well with the Korsmeyer-Peppas kinetic model, and the nitrogen release mechanism of SSRA N2 followed Fick's law of diffusion. The highest oil removal rates by the immobilized microbial material combined with SSRA N2 and oxygen SRA reached 94.9 % (sand column experiment) and 75.1 % (sand tank experiment) during the 45 days of remediation. Moreover, the addition of SRAs promoted the growth of oil-degrading bacteria based on microbial community analysis. This study demonstrates the effectiveness of using immobilized microbial material combined with SRAs to achieve a high efficiency and long-term microbial remediation of oil contaminated shallow groundwater.
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Affiliation(s)
- Juan Sun
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China; State Key Laboratory of Petroleum Pollution Control, Beijing 102206, China.
| | - Shuangxin Shi
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Jin Zheng
- State Key Laboratory of Petroleum Pollution Control, Beijing 102206, China
| | - Xiuzhi Zheng
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Xinyu Xu
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Kaiwen Liu
- Jianghan Machinery Research Institute Limited Co. of CNPC, Wuhan 430074, China
| | - Pengshuo Wei
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Qiuying Chen
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Fang Liu
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Chaocheng Zhao
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Xiuxia Zhang
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
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Sun J, Li R, Wang X, Zhao C, Song Q, Liu F, Wang Z, Liu C, Zhang X. Marine oil spill remediation by Candelilla wax modified coal fly ash cenospheres. CHEMOSPHERE 2023; 330:138619. [PMID: 37031841 DOI: 10.1016/j.chemosphere.2023.138619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 03/24/2023] [Accepted: 04/04/2023] [Indexed: 05/14/2023]
Abstract
Biodegradable candelilla wax (CW) was creatively used for hydrophobic modification of coal fly ash cenospheres (FACs), a waste product from thermal power plants, and a new spherical hollow particulate adsorbent with fast oil adsorption rate and easy agglomeration was prepared. CW was confirmed to physically coat FACs and the optimum mass of wax added to 3 g of FACs was 0.05 g. From a series of batch scale experiments, CW-FACs were found to adsorb oil, reaching adsorption efficiency of 80.6% within 10 s, and aggregate into floating clumps which were easily removed from the water's surface. The oil adsorption efficiency was highly dependent on hydrophobicity of the used adsorbent, the adsorption of Venezuela oil onto CW-FACs was found to be a homogenous monolayer, and the capacity and intensity of the adsorption decreased as temperature increased from 10 to 40 °C. The Langmuir isotherm model was the best fit, with the maximum adsorption capacity achieved at 649.38 mg/g. CW-FACs were also found to be highly stable in concentrated acid, alkaline and salt solutions, as well as for spills of different oil products. Furthermore, the retention rate of the oil adsorption capacity of the CW-FACs after 6 cycles of adsorption-extraction was as high as 93.2%. Therefore, CW-FACs can be widely used, easily recycled, and reused for marine oil spill remediation, which is also a good alternative disposal solution for FACs.
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Affiliation(s)
- Juan Sun
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, China.
| | - Ran Li
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, China
| | - Xiaoyang Wang
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, China
| | - Chaocheng Zhao
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, China
| | - Quanwei Song
- State Key Laboratory of Petroleum Pollution Control, Beijing, 102206, China; CNPC Safety and Environmental Protection Technology Research Institute, Beijing, 102206, China
| | - Fang Liu
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, China
| | - Zihao Wang
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, China
| | - Chunshuang Liu
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, China
| | - Xiuxia Zhang
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, China
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Wang X, Guan F, Huang Z, He H, Wang L, Li K. Study on low temperature plasma combined with AC/Mn + TiO 2-Al 2O 3 catalytic treatment of sewage-containing polyacrylamide. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2023; 87:879-891. [PMID: 36853768 DOI: 10.2166/wst.2023.043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
With the introduction of tertiary oil recovery technology, polymer oil drive technology has effectively improved the recovery rate of crude oil, but the resulting oilfield wastewater-containing polyacrylamide (PAM) is viscous and complex in composition, which brings difficulties to wastewater treatment. The treatment of this kind of wastewater has become an urgent problem to be solved, and the removal of PAM is the key. In this paper, a dielectric barrier discharge (DBD) co-catalyst was used to treat PAM-containing solutions to investigate the effect of different catalytic reaction systems on the degradation of PAM. The morphological changes of the PAM solution before and after the reaction were also studied by the environmental electron microscope scanner (ESEM), and the information of the functional groups in the solution before and after the reaction was studied by infrared spectroscopy analysis of the PAM solution. The degradation rate rose by 26.3% in comparison to that without discharge when AC/Mn + TiO2 and Al2O3 were combined and catalyzed at a mass ratio of 2:1 and a discharge period of 300 min. The degradation rate rose by 19.3 and 6.8%, respectively, in comparison to AC/Mn + TiO2 and Al2O3-catalyzed alone. It demonstrates that this catalytic system has the optimum catalytic effect.
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Affiliation(s)
- Xiaobing Wang
- School of Petroleum Engineering and Natural Gas Engineering, Changzhou University, Changzhou 213016, China E-mail:
| | - Fengwei Guan
- School of Petroleum Engineering and Natural Gas Engineering, Changzhou University, Changzhou 213016, China E-mail:
| | - Zhigang Huang
- School of Petroleum Engineering and Natural Gas Engineering, Changzhou University, Changzhou 213016, China E-mail:
| | - Hao He
- School of Petroleum Engineering and Natural Gas Engineering, Changzhou University, Changzhou 213016, China E-mail:
| | - Lu Wang
- School of Petroleum Engineering and Natural Gas Engineering, Changzhou University, Changzhou 213016, China E-mail:
| | - Kaifeng Li
- School of Petroleum Engineering and Natural Gas Engineering, Changzhou University, Changzhou 213016, China E-mail:
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Abed RMM, Al-Fori M, Al-Hinai M, Al-Sabahi J, Al-Battashi H, Prigent S, Headley T. Effect of partially hydrolyzed polyacrylamide (HPAM) on the bacterial communities of wetland rhizosphere soils and their efficiency in HPAM and alkane degradation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:9713-9724. [PMID: 36063269 DOI: 10.1007/s11356-022-22636-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Accepted: 08/17/2022] [Indexed: 06/15/2023]
Abstract
The effect of partially hydrolyzed polyacrylamide (HPAM) on structure and function of rhizosphere soil bacterial communities in constructed wetlands has been largely underinvestigated. In this study, we compare the effect of 250, 500, and 1000 mg/L of HPAM on bacterial community composition of Phragmites australis associated rhizosphere soils in an experimental wetland using MiSeq amplicon sequencing. Rhizosphere soils from the HPAM-free and the 500-mg/L-exposed treatments were used for laboratory experiments to further investigate the effect of HPAM on the soil's degradation and respiration activities. Soils treated with HPAM showed differences in bacterial communities with the dominance of Proteobacteria and the enrichment of potential hydrocarbon and HPAM-degrading bacteria. CO2 generation was higher in the HPAM-free soils than in the HPAM pre-exposed soil, with a noticeable increase in both soils when oil was added. The addition of HPAM at different concentrations had a more pronounced effect on CO2 evolution in the HPAM-pre-exposed soil. Soils were able to degrade between 37 ± 18.0 and 66 ± 6.7% of C10 to C30 alkanes after 28 days, except in the case of HPAM-pre-exposed soil treated with 500 mg/L where degradation reached 92 ± 4.3%. Both soils reduced HPAM concentration by 60 ± 15% of the initial amount in the 500 mg/L treatment, but by only ≤ 21 ± 7% in the 250-mg/L and 1000-mg/L treatments. In conclusion, the rhizosphere soils demonstrated the ability to adapt and retain their ability to degrade hydrocarbon in the presence of HPAM.
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Affiliation(s)
- Raeid M M Abed
- Biology Department, College of Science, Sultan Qaboos University, Al Khoud, P.O. Box: 36, PC 123, Al Seeb, Sultanate of Oman.
| | - Marwan Al-Fori
- Biology Department, College of Science, Sultan Qaboos University, Al Khoud, P.O. Box: 36, PC 123, Al Seeb, Sultanate of Oman
| | - Mahmood Al-Hinai
- Biology Department, College of Science, Sultan Qaboos University, Al Khoud, P.O. Box: 36, PC 123, Al Seeb, Sultanate of Oman
| | - Jamal Al-Sabahi
- Central Instrumentation Laboratory, College of Agricultural & Marine Sciences, Sultan Qaboos University, Al Khoud, P.O. Box: 34, PC 123, Al Seeb, Sultanate of Oman
| | - Huda Al-Battashi
- Biology Department, College of Science, Sultan Qaboos University, Al Khoud, P.O. Box: 36, PC 123, Al Seeb, Sultanate of Oman
| | - Stephane Prigent
- BAUER Nimr LLC, P.C 114, Al Mina, P.O. Box 1186, Muscat, Sultanate of Oman
| | - Tom Headley
- BAUER Nimr LLC, P.C 114, Al Mina, P.O. Box 1186, Muscat, Sultanate of Oman
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Al-Kindi S, Al-Bahry S, Al-Wahaibi Y, Taura U, Joshi S. Partially hydrolyzed polyacrylamide: enhanced oil recovery applications, oil-field produced water pollution, and possible solutions. ENVIRONMENTAL MONITORING AND ASSESSMENT 2022; 194:875. [PMID: 36227428 PMCID: PMC9558033 DOI: 10.1007/s10661-022-10569-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Accepted: 03/19/2022] [Indexed: 05/27/2023]
Abstract
Polymers, such as partially hydrolyzed polyacrylamide (HPAM), are widely used in oil fields to enhance or improve the recovery of crude oil from the reservoirs. It works by increasing the viscosity of the injected water, thus improving its mobility and oil recovery. However, during such enhanced oil recovery (EOR) operations, it also produces a huge quantity of water alongside oil. Depending on the age and the stage of the oil reserve, the oil field produces ~ 7-10 times more water than oil. Such water contains various types of toxic components, such as traces of crude oil, heavy metals, and different types of chemicals (used during EOR operations such as HPAM). Thus, a huge quantity of HPAM containing produced water generated worldwide requires proper treatment and usage. The possible toxicity of HPAM is still ambiguous, but its natural decomposition product, acrylamide, threatens humans' health and ecological environments. Therefore, the main challenge is the removal or degradation of HPAM in an environmentally safe manner from the produced water before proper disposal. Several chemical and thermal techniques are employed for the removal of HPAM, but they are not so environmentally friendly and somewhat expensive. Among different types of treatments, biodegradation with the aid of individual or mixed microbes (as biofilms) is touted to be an efficient and environmentally friendly way to solve the problem without harmful side effects. Many researchers have explored and reported the potential of such bioremediation technology with a variable removal efficiency of HPAM from the oil field produced water, both in lab scale and field scale studies. The current review is in line with United Nations Sustainability Goals, related to water security-UNSDG 6. It highlights the scale of such HPAM-based EOR applications, the challenge of produced water treatment, current possible solutions, and future possibilities to reuse such treated water sources for other applications.
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Affiliation(s)
- Shatha Al-Kindi
- Department of Biology, College of Science, Sultan Qaboos University, Muscat, Oman
| | - Saif Al-Bahry
- Department of Biology, College of Science, Sultan Qaboos University, Muscat, Oman
- Oil & Gas Research Center, Sultan Qaboos University, Muscat, Oman
| | - Yahya Al-Wahaibi
- A'Sharqiyah University, Postal Code: 400, P.O. Box 42, Ibra, Oman
| | - Usman Taura
- Oil & Gas Research Center, Sultan Qaboos University, Muscat, Oman
| | - Sanket Joshi
- Oil & Gas Research Center, Sultan Qaboos University, Muscat, Oman.
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Zhao L, Zhao D. Hydrolyzed polyacrylamide biotransformation during the formation of anode biofilm in microbial fuel cell biosystem: Bioelectricity, metabolites and functional microorganisms. BIORESOURCE TECHNOLOGY 2022; 360:127581. [PMID: 35798169 DOI: 10.1016/j.biortech.2022.127581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 06/26/2022] [Accepted: 07/01/2022] [Indexed: 06/15/2023]
Abstract
The anode biofilm serves as the core dominating the performance of microbial fuel cell (MFC) biosystem. This research provides new insights into hydrolyzed polyacrylamide (HPAM) biotransformation during the formation of anode biofilm. The current density, coulombic efficiency, voltage, power density, volatile fatty acid (VFA) production and total nitrogen (TN) removal enhanced with the thickening of biofilm (1-6 cm), and the maximums achieved 146 mA·m-2, 47.3%, 8.76 V, 1.28 W·m-2, 184 mg·L-1 and 84.6%, respectively. HPAM concentration descended from 508 mg·L-1 to 83.3 mg·L-1 after 60 days. HPAM was metabolized into VFAs, N2, NO2--N and NO3--N, thereby releasing electrons. Laccase and tyrosine/tryptophan protein induced HPAM metabolism and bioelectricity production. The microbial functions involving HPAM biotransformation and bioelectricity generation were clarified. The alternative resource recovery, techno-economic comparison and development direction of MFC biosystem were discussed to achieve the synchronization of HPAM-containing wastewater treatment and bioelectricity generation based on MFC biosystem.
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Affiliation(s)
- Lanmei Zhao
- College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
| | - Dong Zhao
- Sinopec Shengli Petroleum Administration, Dongying 257000, China
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Wei D, Zhang X, Li C, Zhao M, Wei L. Efficiency and bacterial diversity of an improved anaerobic baffled reactor for the remediation of wastewater from alkaline-surfactant-polymer (ASP) flooding technology. PLoS One 2022; 17:e0261458. [PMID: 34995306 PMCID: PMC8741043 DOI: 10.1371/journal.pone.0261458] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Accepted: 12/02/2021] [Indexed: 11/25/2022] Open
Abstract
Alkaline-surfactant-polymer (ASP) flooding technology is used to maximize crude oil recovery. However, the extensive use of alkaline materials makes it difficult to treat the water used. Here, an improved multi-zone anaerobic baffled reactor (ABR) using FeSO4 as electron acceptor was employed to treat the wastewater from ASP flooding technology, and the effects on major pollutants (hydrolyzed polyacrylamide, petroleum substances, surfactants suspended solids) and associated parameters (chemical oxygen demand, viscosity) were evaluated. Gas chromatography-mass spectrometry (GC-MS) was used to follow the degradation and evolution of organic compounds while high-throughput DNA sequencing was used to determine the bacterial diversity in the ABR. The results obtained after 90 d of operation showed decreases in all parameters measured and the highest mean removal rates were obtained for petroleum substances (98.8%) and suspended solids (77.0%). Amounts of petroleum substances in the ABR effluent could meet the requirements of a national standard for oilfield reinjection water. GC-MS analysis showed that a wide range of chemicals (e.g. aromatic hydrocarbons, esters, alcohols, ketones) could be sequentially removed from the influent by each zone of ABR. The high-throughput DNA sequencing showed that the bacteria Micropruina, Saccharibacteria and Synergistaceae were involved in the degradation of pollutants in the anaerobic and anoxic reaction zones, while Rhodobacteraceae and Aliihoeflea were the main functional microorganisms in the aerobic reaction zones. The results demonstrated that the improved ABR reactor had the potential for the treatment of wastewater from ASP flooding technology.
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Affiliation(s)
- Dong Wei
- School of Life Sciences, Northeast Forestry University, Harbin, Heilongjiang, People’s Republic of China
| | - Xinxin Zhang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, Heilongjiang, People’s Republic of China
- Guangzhou HKUST Fok Ying Tung Research Institute, Guang zhou, Guangdong, People’s Republic of China
| | - Chunying Li
- School of Energy and Civil Engineering, Harbin University of Commerce, Harbin, Heilongjiang, People’s Republic of China
| | - Min Zhao
- School of Life Sciences, Northeast Forestry University, Harbin, Heilongjiang, People’s Republic of China
- * E-mail: (MZ); (LW)
| | - Li Wei
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, Heilongjiang, People’s Republic of China
- Guangzhou HKUST Fok Ying Tung Research Institute, Guang zhou, Guangdong, People’s Republic of China
- * E-mail: (MZ); (LW)
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Zhao L, Bao M, Zhao D, Li F. Correlation between polyhydroxyalkanoates and extracellular polymeric substances in the activated sludge biosystems with different carbon to nitrogen ratio. Biochem Eng J 2021. [DOI: 10.1016/j.bej.2021.108204] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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9
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Rangel-Muñoz N, González-Barrios AF, Pradilla D, Osma JF, Cruz JC. Novel Bionanocompounds: Outer Membrane Protein A and Lacasse Co-Immobilized on Magnetite Nanoparticles for Produced Water Treatment. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E2278. [PMID: 33213016 PMCID: PMC7698600 DOI: 10.3390/nano10112278] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 11/10/2020] [Accepted: 11/13/2020] [Indexed: 02/02/2023]
Abstract
The oil and gas industry generates large amounts of oil-derived effluents such as Heavy Crude Oil (HCO) in water (W) emulsions, which pose a significant remediation and recovery challenge due to their high stability and the presence of environmentally concerning compounds. Nanomaterials emerge as a suitable alternative for the recovery of such effluents, as they can separate them under mild conditions. Additionally, different biomolecules with bioremediation and interfacial capabilities have been explored to functionalize such nanomaterials to improve their performance even further. Here, we put forward the notion of combining these technologies for the simultaneous separation and treatment of O/W effluent emulsions by a novel co-immobilization approach where both OmpA (a biosurfactant) and Laccase (a remediation enzyme) were effectively immobilized on polyether amine (PEA)-modified magnetite nanoparticles (MNPs). The obtained bionanocompounds (i.e., MNP-PEA-OmpA, MNP-PEA-Laccase, and MNP-PEA-OmpA-Laccase) were successfully characterized via DLS, XRD, TEM, TGA, and FTIR. The demulsification of O/W emulsions was achieved by MNP-PEA-OmpA and MNP-PEA-OmpA-Laccase at 5000 ppm. This effect was further improved by applying an external magnetic field to approach HCO removal efficiencies of 81% and 88%, respectively. The degradation efficiencies with these two bionanocompounds reached levels of between 5% and 50% for the present compounds. Taken together, our results indicate that the developed nanoplatform holds significant promise for the efficient treatment of emulsified effluents from the oil and gas industry.
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Affiliation(s)
- Nathaly Rangel-Muñoz
- Department of Biomedical Engineering, Universidad de Los Andes, Carrera 1 este No 19A-40, Bogotá 111711, Colombia;
| | - Andres Fernando González-Barrios
- Grupo de Diseño de Productos y Procesos (GDPP), Department of Chemical and Food Engineering, Universidad de los Andes, Carrera. 1 este No. 19a–40, Bogotá 111711, Colombia; (A.F.G.-B.); (D.P.)
| | - Diego Pradilla
- Grupo de Diseño de Productos y Procesos (GDPP), Department of Chemical and Food Engineering, Universidad de los Andes, Carrera. 1 este No. 19a–40, Bogotá 111711, Colombia; (A.F.G.-B.); (D.P.)
| | - Johann F. Osma
- CMUA, Department of Electrical and Electronic Engineering, Universidad de Los Andes, Carrera. 1 este No. 19a–40, Bogotá 111711, Colombia;
| | - Juan C. Cruz
- Department of Biomedical Engineering, Universidad de Los Andes, Carrera 1 este No 19A-40, Bogotá 111711, Colombia;
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide 5005, Australia
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Zhao L, Zhang C, Lu Z, Bao M, Lu J. Key role of different levels of dissolved oxygen in hydrolyzed polyacrylamide bioconversion: Focusing on metabolic products, key enzymes and functional microorganisms. BIORESOURCE TECHNOLOGY 2020; 306:123089. [PMID: 32155564 DOI: 10.1016/j.biortech.2020.123089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2020] [Revised: 02/25/2020] [Accepted: 02/26/2020] [Indexed: 06/10/2023]
Abstract
Dissolved oxygen (DO) played a short board effect on nitrogen biotransformation and pollutant metabolism. This study for the first time explored the key role of different levels of DO (covering anaerobic, anoxic and aerobic) on hydrolyzed polyacrylamide (HPAM) bioconversion. HPAM was metabolized to intermediates with different chain length. Volatile fatty acid (VFA) production rose first and then descended with DO concentration (0-2 mg·L-1), and the maximum reached 92.5 mg·L-1 when DO was 0.5 mg·L-1. Total nitrogen (TN) removal increased first and then dropped with DO concentration, and the maximum (61.4%) occurred at 0.5 mg·L-1 DO. NH4+-N dipped from 42.8 to 0 mg·L-1 and NO3--N rose from 0 to 32.8 mg·L-1 with DO concentration. The changes of enzyme activities were consistent with those of VFA production and TN removal, which were related to HPAM metabolism and N bioconversion. Microbial function was correlated to HPAM metabolism, N bioconversion and key enzyme.
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Affiliation(s)
- Lanmei Zhao
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Congcong Zhang
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Zhiyang Lu
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Mutai Bao
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China.
| | - Jinren Lu
- College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
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