Article
Biotechnology & Applied Microbiology
Carmen S. D. Rodrigues, Luis M. Madeira
Summary: The study investigated the degradation of p-nitrophenol using activated persulfate oxidation, finding that under optimal conditions, the highest removal rates could be achieved. Persulfate concentration and the presence of iron salt were found to significantly impact process performance.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Agricultural Engineering
Xinxin Li, Gang Fang, Liping Chen, Rongxin Guo, Dexun Zou, Yanping Liu
Summary: Thermally activated persulfate pretreatment of corn straw significantly increased the production of reducing sugar and VFAs in anaerobic digestion, reduced lignin content, and promoted the degradation of total and volatile solids, improving the performance and stability of anaerobic digestion. The impact of dissolved organic matter loss outweighed that of residual Na+ and SO42-.
BIOMASS & BIOENERGY
(2021)
Article
Engineering, Environmental
Yixin Huang, Jing Zou, Jinbin Lin, Haoyu Yang, Mengyun Wang, Jiawen Li, Wei Cao, Baoling Yuan, Jun Ma
Summary: This study discovers that 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonate) (ABTS) can serve as both an activator and an electron shuttle to enhance the activation of peroxydisulfate (PDS) and enhance the degradation of diclofenac (DCF). The PDS/ABTS system generates multiple reactive species, with ABTS(center dot+) and (OH)-O-center dot directly contributing to the degradation of DCF. The PDS/ABTS system shows good anti-interference capacity and further improved performance can be achieved by encapsulating ABTS into cellulose.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Review
Biochemistry & Molecular Biology
Annabel Fernandes, Maria Joao Nunes, Ana Sofia Rodrigues, Maria Jose Pacheco, Lurdes Ciriaco, Ana Lopes
Summary: The electrochemically activated persulfate process is an effective method for treating complex wastewater, with clear advantages and limitations. It is mainly applied in the treatment of industrial effluents, and an exhaustive evaluation on the influence of experimental parameters and organic load removal has been conducted.
Review
Chemistry, Physical
Jianting Sun, Wei Zheng, Gang Hu, Fan Liu, Siyuan Liu, Lie Yang, Zulin Zhang
Summary: Electrochemically assisted persulfate oxidation processes (EPOPs) have become increasingly popular for the degradation of organic pollutants. This review discusses the current status and prospects of EC/PS degradation and highlights the enhanced oxidation of organic contaminants using the combination of EC and PS. Various operational variables affecting contaminant removal are investigated, with the optimal conditions being case-specific. EPOPs offer a promising alternative to traditional advanced oxidation techniques, although there are still some drawbacks and challenges for large-scale applications.
Article
Engineering, Environmental
Arezou Fazli, Alireza Khataee, Marcello Brigante, Gilles Mailhot
Summary: Cubic cobalt and zinc doped magnetite nanocatalysts were synthesized and used for activation of hydrogen peroxide and persulfate under UVA irradiation, showing good performance in degrading Sulfalene in water. The integration of Fe2.5Co0.3Zn0.2O4 improved activation efficiency, leading to 67% SFL degradation in real wastewater.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Spectroscopy
Seda Uzunboy, Ozge Karakas, Sema Demirci-cekic, Resat Apak
Summary: A selective and simple colorimetric method for determining sulfate anion radical has been developed, using Cr(III) as an activator for persulfate. This method allows measurement of the formation and scavenging of sulfate anion radical, as well as other UV-absorbing sulfate radical scavengers.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Biotechnology & Applied Microbiology
Ahmad Razali Ishak, Soo Wei Khor, Sharifah Mohamad, Kheng Soo Tay
Summary: A laboratory-scale automated continuous flow leachate treatment system was developed in this study, combining coagulation-flocculation and UV-activated persulfate advanced oxidation process to efficiently reduce color, chemical oxygen demand, total organic carbon, metals, and toxicity of stabilized landfill leachates (SLL).
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Engineering, Chemical
Hongbin Wang, Jiewen Deng, Xiaohui Lu, Li Wan, Jin Huang, Yiqing Liu
Summary: The study investigated the enhancement of diclofenac (DCF) degradation by Fe(II)-activated persulfate (PS) combined with bisulfite (BS), showing that the introduction of BS in Fe(II)/PS process improved the efficiency and stability of DCF degradation. The main iron species identified were FeHSO3+, Fe2+, and FeOHSO3H+, and the reactive radical for DCF oxidation in the BS/Fe(II)/PS process was confirmed to be SO4·-. The BS/Fe(II)/PS system presented a synergistic effect for rapid and steady DCF degradation, providing an effective and environmentally friendly approach to sewage treatment.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Environmental Sciences
Seong-Eun Yoon, Cheolyong Kim, Inseong Hwang
Summary: The study found that the superior performance of the continuous Fe2+ dosing scheme over the single Fe2+ dosing scheme is mainly due to the molar Fe2+ feeding rate determining the phenol removal rate.
Review
Engineering, Environmental
Stefanos Giannakis, Kun-Yi Andrew Lin, Farshid Ghanbari
Summary: SR-AOPs have gained significant attention in recent years for their versatility and efficacy in disinfection and decontamination. These processes, which generate sulfate radicals or sulfate and hydroxyl radicals, have been successfully applied in the treatment of various industrial wastewater, providing a potential solution for better wastewater treatment practices.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Joao P. F. Venancio, Carmen S. D. Rodrigues, Olga C. Nunes, Luis M. Madeira
Summary: In this study, the disinfection of secondary effluent from a wastewater treatment plant was achieved using iron-based persulfate activation, demonstrating effective removal of microorganisms and organic matter while meeting reuse requirements.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Chemical
Nuno Jorge, Ana R. Teixeira, Vanessa Guimaraes, Marco S. Lucas, Jose A. Peres
Summary: This study investigated a treatment process combining adsorption and thermocatalytic oxidation for winery wastewater. By optimizing the operational conditions, high removal efficiencies of organic carbon, chemical oxygen demand, and polyphenols were achieved. Additionally, the effect of the treatment processes on the germination index of plant seeds was evaluated.
Article
Engineering, Environmental
Xingyun Hu, Feng Zhu, Linghao Kong, Xianjia Peng
Summary: This study proposes a new method to remove chloride ion (Cl(-I)) from strongly acidic wastewater using thermal activated persulfate (PS), achieving over 96% removal of Cl(-I) under optimized conditions. The key step for Cl(-I) removal was identified as the formation of ?Cl or ?Cl2? from the oxidation of Cl(-I) by ?SO4? and ?OH, with estimated contribution ratios of 67.4% and 32.6%, respectively.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Yanqing Cong, Wanxing Wang, Xiang Chen, Shi-Wen Lv
Summary: A novel dandelion-like NiCo2O4 microsphere was synthesized and used as a catalyst for rapid degradation of organic pollutants, showing high catalytic activity and structural stability; The oxidation system demonstrated strong degradation capability towards various contaminants with low-toxicity byproducts; Redox couples of Co3+/Co2+ and Ni3+/Ni2+ were identified as main catalytic sites, with SO4· and · OH as main active species in the reaction system.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Chemical
Yunfei Yu, Xue Yang, Chenchen Zhang, Jie Chen, Wei Lin, Jianqiang Meng
Summary: This study reports an environmentally friendly and simple approach for preparing double-network (DN) ion gel membranes with high strength and excellent gas separation performance. By optimizing crosslinking density, mass ratio, and the type and content of free ionic liquid, the mechanical and gas separation properties of the DN membrane are improved.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Si-qi Jiang, Qiang Gao, Xi-guang Li, Chao-zhu Deng, Jun Qiu, Xiang-nan Zhu
Summary: A dual-strengthening pretreatment method is proposed to remove PVDF more efficiently and enhance the leaching of LiCoO2. Experimental results show that dual-strengthening pretreatment can effectively remove PVDF and significantly improve the leaching efficiency compared to single pretreatment methods.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Zengchi Hu, Xiaoyu Wang, Xiaohui Zhang, Xue Li, Jiangbin Xia
Summary: The rapid fabrication of high-performance composite membranes based on CMPs using simple and low-cost methods is challenging. In this study, three CMPs-based composite membranes were rapidly fabricated with adjustable size using unidirectional diffusion synthesis. The microstructural design enhanced the rejection rates of the membranes and they showed strong hydrolytic resistance, thermal stability, and acid-base resistance. Electrostatic adsorption and the adjustable microstructures significantly varied the repellence of the membranes to different charged molecules.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Farzaneh Rouhani, Matineh Ayedi, Nasser Safari
Summary: Introducing defects into porous metal-organic frameworks is important for improving their adsorption performance. Quasi-MOFs, an underutilized variant of large-scale, fundamentally deficient MOFs, have been found to have substantial amounts of unsaturated metal sites to offset the drawbacks of MOFs. In this study, a quasi-MOF was produced using a water-stable MOF and demonstrated significantly improved phosphate adsorption capability due to the presence of defect sites.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Valentin Reungoat, Morad Chadni, Louis M. M. Mouterde, Fanny Brunissen, Florent Allais, Helene Ducatel, Irina Ioannou
Summary: This study focuses on the recovery of sinapic acid using liquid-liquid extraction assisted by a hollow fiber membrane contactor from an aqueous feed obtained through the hydrolysis of mustard bran. The screening of solvents of different chemical nature showed that all tested solvents had an extraction efficiency of more than 80% for pH < 5. Four solvents were selected for use in the hollow fiber membrane contactor, and the volatile solvents showed higher mass transfer coefficients compared to non-volatile solvents. The extraction efficiency was intensified by increasing the initial concentration of sinapic acid and the feed-to-solvent ratio. CPME was found to have optimal recovery efficiency at a phase ratio of 8:1, yielding 0.9 g of sinapic acid per liter of CPME used.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Takahiro Sakamoto, Takafumi Hanada, Hayate Sato, Mayu Kamisono, Masahiro Goto
Summary: The emergence of the battery society has led to a high demand for battery metals, resulting in a strain on their supply. This study introduces a novel technique using a hydrophobic deep eutectic solvent (DES) for leaching and recovering battery metals from low-grade nickel laterite ores. The DES enables selective leaching and recovery of the metals, offering a promising pathway for the extraction of critical battery metals.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Rongrong He, Jiarui Chen, Chunyao Zhang, Dan Lu, Lin Zhang, Tao He
Summary: Researcher has developed a method to quantify the charge density in nanofiltration (NF) membrane separation layer and applied it in NF membranes that can separate Mg2+ and Li+. The results showed that overcompensated amine groups played a major role, and there was a linear relationship between charge density and coating bi-layers or PAH layers.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Zhijian Zhang, Min Chen, Zhe Lin, Zhichao Yang, Yafeng Du, Zhihui Chen, Zhenhao Yang, Kongyin Zhao, Ligang Lin
Summary: Membrane technology plays an important role in molecular/ion separation processes, but faces challenges such as membrane fouling. This study introduces a new ion-crosslinking method to fabricate copper alginate hydrogel membranes with improved mechanical strength and antimicrobial capabilities. The membranes exhibit excellent separation performance and enhanced long-term molecule/ion separation through improved anti-swelling properties. Molecular dynamics simulations and life cycle analysis highlight the pore structure and environmental friendliness of the hydrogel membranes. These findings provide valuable insights for developing sustainable hydrogel membranes with stable performance and high separation efficiency.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Dongmei Liu, Aiying Guo, Yanling Qi, Zhixin Ji, Hongjuan Li, Zhiwei Zhang, Xinyue Zhang, Kunze Wu, Aijun Cai
Summary: In this study, a stable magnetic Mg/Mn-layered double oxide-doped biochar composite (MgMnLDO-MBC) was prepared and successfully used for the removal of antibiotics and bacteria from wastewater. The composite exhibited enhanced surface areas, adsorption sites, and free radicals, leading to improved catalytic activity. The effects of different factors on the removal efficiency were evaluated, and the composite showed good reusability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Feng Wang, Zhaoyong Bian, Yaru Zhang, Wenchao Yu, Qiang Zhang, Hui Wang
Summary: In this study, a nanofibrous layered structure of Ff-Ti3C2Tx-Co3O4 was prepared by self-assembling nanofibrous Co3O4 with lamellar fluorine-free MXene (Ff-Ti3C2Tx). The Ff-Ti3C2Tx-Co3O4 exhibited excellent catalytic activity for degradation, resistant to ionic interference, and maintained high removal efficiency of sulfamethoxazole (SMX) in municipal wastewater. The rapid SMX degradation involved fast electron transfer in redox cycles with PMS and the generation of 1O2 via PMS ->center dot O2 -> 1O2. This work provides new insights into antibiotic degradation mechanisms and electron transfer based on PMS activation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Weipeng He, Jiacheng Luo, Yujie Wu, Tianhao Luo, Chen Tang
Summary: This study comparatively evaluated the role of cationic, anionic, and nonionic polyacrylamides (PAMs) in ballasted flocculation of clay suspensions under different aluminum sulfate (AS) coagulant dosages. The selection of PAMs and AS dosage had a significant influence on the size and shear resistance of ballasted floc aggregates.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Lixian Wang, Lizhi Zhao, Didi Si, Zhixin Li, Huiqin An, Hui Ye, Qingping Xin, Hong Li, Yuzhong Zhang
Summary: Metalloporphyrin-based nanozymes integrated with poly (vinylidene fluoride) membrane show high catalytic activity and reusability for the decolorization of Congo Red dye in continuous flow process.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Yongfei Ma, Chenyu Zeng, Yongzhen Ding, Jiayi Tang, Ondrej Masek, Zhikang Deng, Rui Mu, Zulin Zhang
Summary: In this study, sludge-derived biochar (SBC) was functionalized with various iron salts to enhance its adsorption ability for sulfamethoxazole (SMX) and magnetic collection performance. Ball milling was further employed to treat the optimal iron salt functionalized SBC (MSBC), resulting in ball milled SBC (BMSBC) with improved adsorption performance for SMX. The dominant driving mechanism for SMX adsorption onto BMSBC was confirmed to be multiple physicochemical forces, including 7C-7C conjugation, pore filling, H-bonding, Fe-O complexation, and electrostatic interactions. BMSBC exhibited favorable adsorption ability for SMX in actual waters and could be easily collected within 1 min due to its magnetic sensitivity.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Jinglin Tan, Xiaohui Mao, Wenjihao Hu, Hongbo Zeng
Summary: This study investigates the influence of PDMS chain architectures on surface properties and reveals that PDMS coatings with looped structures exhibit superior hydrophobicity, self-cleaning, and water sliding compared to coatings with linear structures. Additionally, both looped and linear PDMS coated stainless steel mesh/polyester fibers show efficient separation of oil/water mixture.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Wei-Liang Chen, Chih-Chia Cheng, Chien-Hsing Lu, Jem-Kun Chen
Summary: This study designs a novel sandwich-structured capacitor that reduces the absorption time of pollutants using dielectrophoresis force. By coating graphene oxide on polystyrene microspheres as adsorbents and encapsulating them within the capacitor, the adsorption rate is significantly enhanced. Additionally, frequency manipulation allows for the recycling of adsorbents and concentration of dyes, minimizing secondary pollution.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)