Article
Engineering, Environmental
Yujie Yan, Zhang Ling, Wen Shu, Tao Huang, Rich Crane
Summary: A novel 3D electrokinetic remediation (3D EKR) system using FeOx/granular activated carbon (GAC) composite as a third electrode was studied for Cr removal from contaminated soil. The inclusion of third electrode particles in the soil improved the current density and reduced polarization compared to the conventional 2D EKR system. The enhanced oxidation of Cr(III) to Cr(VI) and electromigration towards the anode contributed to higher Cr removal.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Yunfeng Xu, Chuyin Liu, Yangwei Qu, Ying Ding, Jia Zhang
Summary: This study investigated the efficient remediation of Cr-contaminated soils using pineapple-peel extract (PPE) as an electrolyte. The results showed that modified PPE electrolyte significantly improved Cr removal efficiency and allowed for the effective recycling of pineapple residual, contributing to environmentally friendly practices.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Engineering, Environmental
Namuun Ganbat, Faris M. Hamdi, Ibrar Ibrar, Ali Altaee, Lilyan Alsaka, Akshaya K. Samal, John Zhou, Alaa H. Hawari
Summary: This study evaluated the feasibility of using iron slag PRB enhanced-EK process with NaC biosurfactant for removing PFOA from soil. The results showed that the PFOA removal rate could be increased to 94.09% by extending the testing duration and using NaC enhancement. This study confirms the sustainable approach of utilizing iron slag waste in the EK process for capturing PFOA contaminants.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Environmental
Chiquan He, Anni Hu, Feifei Wang, Pu Zhang, Zhenzhen Zhao, Yanping Zhao, Xiaoyan Liu
Summary: The study investigated the remediation of heavy metal contaminated soils using a new sheet PRB material, as well as the impact of citric acid and Shewanella oneidensis pretreatment on the removal efficiency of zinc and cadmium. The results showed that the CA + MR-1 group exhibited the highest removal efficiency and adsorption capacity for Zn(II) and Cd(II) during EK-PRB treatment.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
S. Maldonado, R. Lopez-Vizcaino, M. A. Rodrigo, P. Canizares, V Navarro, G. Roa, C. Barrera, C. Saez
Summary: The study shows that the PRB-EKSF process mainly relies on electrokinetic transport and dehalogenation for treating contaminated soil, while the adsorption on GAC is not as crucial as expected. In the pilot scale, a significant amount of clopyralid remained in the soil after treatment, and the transport of volatile compounds into the atmosphere was promoted.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Yan Song, Cheng Lei, Kun Yang, Daohui Lin
Summary: The study combined electrokinetic and iron-carbon material for soil remediation, finding that the EK-Fe/C system showed a high efficiency in removing PCB28, primarily due to the enhanced Fenton reaction by EK and Fe/C. Other oxidation and reduction processes also contributed to the removal of PCB28 in the EK-Fe/C system.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
Jaber Neshati, Faraz Biabanaki, Nader Shariatmadari
Summary: This study focuses on the applicability of combining the electrokinetic and permeable reactive barriers techniques, and demonstrates their high efficiency and advantages compared to other techniques through experiments and statistical analysis.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2023)
Article
Engineering, Environmental
Yunlong Li, Liguo Jiang
Summary: The study investigated the efficiency of different surfactants in treating crude oil-contaminated low-permeability soil, with Tween 80 showing the highest removal rate.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Xueming Liu, Hong Deng, Dongye Zhao, Qiulin Yang, Zhihua Zhu
Summary: In this study, a type of Ca-Fe-S microparticles was prepared and tested for the reductive immobilization of Cr(VI) in water and soil. The Ca-Fe-S showed higher removal efficiency of Cr(VI) compared to FeSO4 and CaSx in solution. It was also able to effectively sequester Cr(VI) in soil, with a leachable concentration below the regulatory limit after 730 days of curing.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Biotechnology & Applied Microbiology
Qiang Liu, Yuyu Jiang, Yangyang Liu, Xiaolei Zhang, Yunfeng Xu, Huihui Chen, Weimin Cao
Summary: Coconut shell biochars prepared from oxygen-free pyrolysis were used in a permeable reactive barrier (PRB) for electrokinetic remediation (EK) to remove 2,4,6-trichlorophenol (2,4,6-TCP) from soil. The addition of biochar to the PRB significantly increased the removal of 2,4,6-TCP compared to PRB without biochar. The voltage input was found to be the major factor influencing the TCP removal during the EK-PRB process. The optimal conditions for TCP removal were found to be 2 V cm-1 voltage, 700 degrees C pyrolysis temperature, and 40 mg L-1 initial TCP concentration. The biochar played multiple roles in EK remediation, including enhancing electroosmotic flow, adsorbing TCP, and promoting electrochemical degradation. Biochar from high pyrolysis temperature was particularly effective in enhancing electroosmotic flow and pollutant adsorption.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2022)
Article
Biotechnology & Applied Microbiology
Huichao Xu, Jing Bai, Xinru Yang, Chunpeng Zhang, Meng Yao, Yongsheng Zhao
Summary: This study investigated the remediation of chromium-contaminated natural fine sand aquifer by electrokinetic remediation. Continuous power supply and intermittent power supply modes were able to remove 96.8%-100.0% and 99.2-100.0% of Cr(VI) pollutants after 25 hours of operation, respectively. Electrokinetic remediation shows promising prospects for dynamic aquifers.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2022)
Article
Environmental Sciences
Mingzhu Zhou, Qiuhua Li, Xia Wang, Qiao Huang, Long Cang
Summary: PMS showed higher removal efficiencies for PAHs contaminated soil compared to PS, indicating its superior oxidation capacity. The use of enhancements increased the removal efficiency for PAHs by 0.33 to 2.10 times, with the highest efficiency achieved at a fixed catholyte pH of 4.
Article
Engineering, Environmental
Jialing Zhao, Luping Zhang, Shuwang Zhang, Wenying Yuan, Xing Fang, Qianqian Yu, Xinhong Qiu
Summary: By calcining MgAl and CaAl at different temperatures, they can effectively immobilize Cr(VI) in the soil. Mg-500 degrees C and Ca-900 degrees C show good adsorption capacities, while the structures after high temperature treatment have poor adsorption performance for Cr(VI).
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Biotechnology & Applied Microbiology
Yunfeng Xu, Qinqin Lu, Jiangpeng Li, Lingyu Wan, Shuang Chen, Yongsheng Lu
Summary: This study investigated the effect of humus on the remediation of arsenic-contaminated soil by electrokinetic technology. The results showed that the addition of humus significantly promoted the release of As from the soil during electrokinetic remediation, leading to an obvious enhancement in remediation efficiency. The presence of oxygen-containing functional groups in humus desorbed As from the soil particles, making humus a green agent to improve the EKR technology.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Engineering, Environmental
Jing Wang, Li'an Hou, Zhikan Yao, Yonghai Jiang, Beidou Xi, Shiying Ni, Lin Zhang
Summary: In this study, aminated electrospun nanofiber membrane (ENFM) with high Cr(VI) adsorption capacity and regenerability was successfully synthesized and demonstrated to be effective in the remediation of Cr(VI) contaminated soil.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Bahdja Hayoun, Silvia Escudero-Curiel, Mustapha Bourouina, Saliha Bourouina-Bacha, Ma Angeles Sanroman, Marta Pazos
Summary: The study demonstrated that hydrochar prepared with citric acid (3 M) showed significantly improved adsorption efficiency for drugs, as well as enhanced structural and morphological properties of the adsorbent.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Aida M. Diez, Ivan Nunez, Marta Pazos, M. Angeles Sanroman, Yury Kolen'ko
Summary: Fluoride-doped TiO2 (F-TiO2) synthesized by a one-step method was used for efficient UV-photo-degradation of methylene blue (MB) and bisphenol A (BPA) with reduced energy consumption. The catalyst showed better performance than commercial TiO2, and could be reused with improved efficiency by addition of H2O2.
Review
Chemistry, Multidisciplinary
Antia Fdez-Sanroman, Emilio Rosales, Marta Pazos, Angeles Sanroman
Summary: This article evaluates the potential of metal-organic frameworks as catalysts in advanced oxidation processes, focusing on their application in reducing pollutants or rendering them harmless in wastewater. The synthesis methods of metal-organic frameworks and the mechanism of radical generation are outlined, along with the challenges this technology faces in future wastewater treatment.
APPLIED SCIENCES-BASEL
(2022)
Article
Biotechnology & Applied Microbiology
Abdelmageed M. M. Othman, Angeles Sanroman, Diego Moldes
Summary: In this study, it was found that the multi-point covalently immobilized laccase from Myceliophthora thermophila on the modified immobilized carrier (Immobead 150P) showed the best immobilization characteristics, retaining 95% of its initial activity after 10 cycles of operation at pH 3.0 and temperature 70 degrees C. The thermodynamic parameters of thermal inactivation demonstrated the positive impact of immobilization. The immobilized enzyme exhibited enhanced stability in alkaline conditions and the ability to provide hydrophobic properties to wood.
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2023)
Article
Environmental Sciences
Raquel Rios-Castro, Adrian Cabo, Eva Teira, Claudio Cameselle, Susana Gouveia, Pedro Payo, Beatriz Novoa, Antonio Figueras
Summary: In this study, the DNA metabarcoding technique was used to analyze prokaryote diversity and community structure in wastewater and evaluate the efficiency of a wastewater treatment plant. The results showed significant differences in microbiomes among different sample types, with exclusive OTUs found in mussels, post-treatment discharge water, and raw wastewater. Seasonal variations were also observed in wastewater, potentially influenced by abiotic factors. The presence of potential pathogens in raw wastewater highlighted the importance of wastewater treatment, which was confirmed to effectively remove pathogens.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Electrochemistry
Aida M. Diez, Xiang Lyu, Marta Pazos, M. Angeles Sanroman, Geoff McCool, Oleg I. Lebedev, Yury Kolen'ko, Alexey Serov
Summary: This work introduces a convenient phosphorization protocol to convert commercial bimetallic Ni-Mo and Ni-Re electrocatalysts into their respective phosphides, enabling them to be stable under acidic conditions and suitable for water reduction in acidic electrolyte.
ELECTROCHIMICA ACTA
(2023)
Article
Environmental Sciences
Aida M. Diez, Marta Pazos, M. Angeles Sanroman, Helen Valencia Naranjo, Joachim Mayer, Yury Kolen'ko
Summary: This study successfully synthesized and characterized fluoride-doped-TiO2 and demonstrated its applicability in solid-phase photodegradation of polyethylene films for the first time. After three weeks of UV A radiation using a low consumption LED lamp, the polyethylene films containing only 2% of the photocatalyst experienced nearly 50% weight loss, surpassing previously reported data. The results suggest the potential for future production of self-photodegradable plastics for environmental and wastewater treatment applications.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Chemistry, Physical
Antia Fdez-Sanroman, Barbara Lomba-Fernandez, Marta Pazos, Emilio Rosales, Angeles Sanroman
Summary: Three CuFe-MOFs with different structures were synthesized successfully by varying the ratio of solvents, salts, or temperature. CuFe(BDC-NH2)(D) and CuFe(BDC-NH2)(S) exhibited improved PMS activation for Rhodamine B removal, achieving a removal rate of around 92%. The best degradation system for a mixture of antibiotic and anti-inflammatory drugs was the photo-assisted activation of PMS using CuFe(BDC-NH2)(D) and CuFe(BDC-NH2)(S), resulting in complete degradation within 1 hour. CuFe(BDC-NH2)(R)/PMS showed higher antibacterial activity due to its higher copper content.
Article
Chemistry, Physical
Anton Puga, Emilio Rosales, Marta Pazos, Maria Angeles Sanroman
Summary: The synthesis of an iron catalyst (Fe-DES) was proposed in this work, which was characterized physically and chemically. The Fe-DES was shown to be a multipurpose catalyst that can be applied in various processes for the removal of pharmaceuticals in wastewater.
Article
Biotechnology & Applied Microbiology
Esin Balci, Emilio Rosales, Marta Pazos, Aysun Sofuoglu, Maria Angeles Sanroman
Summary: This study investigated the degradation of dibutyl phthalate (DBP) using esterase and lipase enzymes from different microorganisms, and examined the feasibility of immobilizing the most effective enzyme on a clayey material. The results showed that esterase from Bacillus subtilis had the highest degradation efficiency and immoblization improved thermal and storage stability. Additionally, the immobilized enzyme composite maintained high catalytic activity after 7 continuous cycles.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Review
Food Science & Technology
Silvia Escudero-Curiel, Alba Giraldez, Marta Pazos, Angeles Sanroman
Summary: Agri-food residues and by-products are recognized as valuable products that can be used in other industries, such as environmental remediation. These materials, transformed into biochar and hydrochar through engineering techniques, have substantial potential as versatile adsorbents in wastewater treatment and promising alternatives in various environmental and energy-related applications. This sustainable approach provides cost-effective and satisfactory solutions, addressing environmental concerns and paving the way for a more eco-friendly and resource-efficient future.
Article
Biotechnology & Applied Microbiology
Imane Akkari, Zahra Graba, Marta Pazos, Nacer Bezzi, Fatiha Atmani, Amar Manseri, Mohamed Mehdi Kaci
Summary: Due to the rapid growth of bio-waste, there are various difficulties in disposal and governance. Therefore, recycling and repurposing bio-waste for environmental purposes have gained more attention. In this study, a novel activated hydrochar (AHPP) was synthesized from pomegranate peels using hydrothermal carbonization (HTC) followed by phosphoric acid activation. The characteristics of AHPP were determined using various techniques, and its potential for adsorbing Basic Red 46 (BR46) dye was assessed. The results showed that AHPP can effectively adsorb BR46, and it could be reused multiple times.
BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY
(2023)
Article
Environmental Sciences
Alba Giraldez, Antia Fdez-Sanroman, Daniel Terron, M. Angeles Sanroman, Marta Pazos
Summary: In recent years, the issue of pathogens in the environment has gained widespread concern. New research has been conducted on removing pathogens and persistent pollutants from water. The study evaluated the effectiveness of the nanostructure copper-organic framework, HKUST-1, as a catalyst for eliminating Escherichia coli and generating sulphate radicals through peroxymonosulphate (PMS) activation. The disinfection process was optimized and achieved complete elimination of Escherichia coli growth after 30 minutes using a concentration of 60.5 mg/L HKUST-1 and 0.1 mM PMS. A novel development involving encapsulating HKUST-1 on polyacrylonitrile was proposed to overcome operational limitations and enable continuous treatment in a flow disinfection process.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)