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
Chemistry, Multidisciplinary
Hao Jiang, Yaomin Li, Zhengnan Su, Tiantian Zhang, Lihui Meng, Yanru Hu, Jiangling Wan, Guoxi Xiong, Qingzhi Wu
Summary: Using carbon nanofibrous mats encapsulating ZVI NPs, the study successfully degraded methylene blue organic pollutants, with higher ZVI NP content leading to significantly improved degradation rates. The single-axial structure mat exhibited higher degradation rate than the co-axial structure mat.
Article
Chemistry, Physical
Anlin Xu, Siyan Fan, Tong Meng, Ren Zhang, Yunhai Zhang, Shunlong Pan, Yongjun Zhang
Summary: In this study, a biological method using manganese oxidizing bacteria was used to synthesize multi-metal oxides for the first time to catalyze ozonation. The catalytic activities were found to be significantly influenced by the dosage of cobalt, cultivation time, and polishing methods. The optimized Bio-FeMnCoOx catalyst showed a second-order degrading kinetic constant 4.8 times higher than that of the physiochemically synthesized peer.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Environmental Sciences
Chanchan Shen, Ying Wang, Jun Fu
Summary: Urchin-like Co3O4 anchored on reduced graphene oxide showed excellent activity in peroxymonosulfate activation for ibuprofen degradation. The dosage of Co3O4-rGO, IBU concentration, PMS concentration, and pH had influences on the removal of IBU and total organic carbon. The valence state conversion of Co2+/Co3+ was identified as the critical PMS activation mechanism.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Engineering, Environmental
Boyin Yan, DongChuan Xu, Zhiquan Liu, Jiangzhou Tang, Rui Huang, Min Zhang, Fuyi Cui, Wenxin Shi, Chun Hu
Summary: The degradation of BMAA in the UV254/persulfate system follows a pseudofirst-order kinetic model, with SO4· identified as the major radical contributing to the degradation. The pH significantly affects the degradation rate, with the highest rate achieved at pH 8. However, the presence of water matrix components inhibits the degradation process.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Chemical
Wei Cheng, Peizhi Wang, Yuhao Zhang, Haorui Wang, Jun Ma, Tao Zhang
Summary: In this study, the oxidation resistance of fully aromatic (NF90) and semi-aromatic (NF270) polyamide NF membranes to reactive oxidative species including SO4. and HO. was investigated. The results showed that SO4. was more reactive to the N moieties of the NF90 membrane, while HO. reacted unselectively with polyamides. The radicals also affected the permselectivity of the membranes differently. Fully aromatic polyamide membrane exhibited higher resistance to oxidative radicals than semi-aromatic polyamide membrane.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Environmental
Thanh Binh Nguyen, C. P. Huang, Ruey-an Doong, Chiu-Wen Chen, Cheng-Di Dong
Summary: The CoO@mpgCN/PMS system showed high catalytic reactivity and SMX removal efficiency over a wide pH range, with stable and consistent degradation capacity for at least five consecutive cycles. The significant catalysis performance was attributed to the uniformly distributed mesopores, large specific surface area, and high electron transfer ability of CoO@mpgCN at the active CoO sites, leading to a radical chain reaction mechanism for SMX degradation.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Zhichao Yang, Yaodan Cui, Bingcai Pan, Joseph J. Pignatello
Summary: Improving the reactivity of Fe(III) for activating peroxymonosulfate is crucial for practical wastewater treatment. The complexes of Fe(III) with biodegradable picolinic acid (PICA) were found to significantly outperform other Fe(III) complexes in activating PMS. The key intermediate in the activation pathway was identified as PICA-FeIII-OOSO3-, and the relative contributions of different species depended on the structure of target compounds.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Chemical
Qiansong Li, Hao Xu, Guanyu Zhou, Feng Cheng, Meijing Wang, Jing Zhang, Yunqi Wang, Xue Huang, Qingguo Wang
Summary: In this study, the degradation of metronidazole was successfully achieved by activating sulfite with an iron-doped graphite carbonitride catalyst, and the main radical reaction pathway was identified. The 5%Fe-g-C3N4 catalyst showed good performance in the homogeneous system and exhibited good cycling stability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Environmental Sciences
Zhendong Yang, Zhenghua Liu, Maria Dabrowska, Klaudia Debiec-Andrzejewska, Robert Stasiuk, Huaqun Yin, Lukasz Drewniak
Summary: The use of biogenic ammonia produced by urea degrading bacteria as a pretreatment agent can increase the pH of leachate and stimulate the activity of sulfate-reducing bacteria, ultimately improving sulfate removal efficiency.
Article
Engineering, Environmental
Qiaofeng Hong, Chao Liu, Zhenbei Wang, Ruoyu Li, Xiaoliang Liang, Yiping Wang, Yuting Zhang, Zilong Song, Zhihui Xiao, Tingyu Cui, Beibei Heng, Bingbing Xu, Fei Qi, Amir Ikhlaq
Summary: A highly active mediator (MFB) based on FeS@biochar was prepared for peroxymonosulfate (PMS) activation, showing excellent performance in degrading 2,4-D pesticides with enhanced lifetime. The optimized reaction parameters were determined, and a novel kinetics model was proposed for describing the interfacial adsorption and catalytic reaction process accurately. The study also highlighted the inhibitory effects of pH and coexisting anions on 2,4-D degradation, providing a promising approach for designing high-performance mediators in environmental remediation.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Danhong Shen, Linyu Shen, Bihong Zhang, Minjie Li, Jinjian Ding, Liang-Hong Guo
Summary: In this study, an electrocatalytic system using reduced graphene oxide supported single-atom copper anode was developed for the defluorination of perfluorooctanoic acid (PFOA). The system showed high electrocatalytic properties and achieved efficient removal of PFOA in a short period of time.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Gaofeng Zhu, Shuhua Xiong, Chen Shi, Yang Jin, Mingqiao Ge
Summary: Ce-doped Cu-Fe@gamma-Al2O3 microspheres exhibited excellent activation efficiency for PDS, leading to rapid degradation of various pollutants.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Engineering, Environmental
Yong-Tao Li, Wan-Ying Du, Jing-Lin Chen, Jiu-Jiang Zhang, Xin-Yue Liu, Hao Liu, Yi-Lan Zhang, Yuan-Yuan Hu
Summary: This study evaluated the feasibility of N-methyldiethanolamine (MDEA) degradation through electrochemical activation of persulfate (PS). The results showed that the dosage of PS, voltage, and initial pH had an impact on the removal rate of MDEA, and the synergistic effect between SO4-. and the three-dimensional electrochemical system increased the removal rate. In addition, kinetic analysis revealed that the degradation process followed a pseudo-first-order model and the reaction rate increased with increasing voltage.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Zhiying Li, Fei Wang, Yimei Zhang, Yuxian Lai, Qinglu Fang, Yaxiao Duan
Summary: In this study, a CuFe2O4-CoFe2O4 metallic oxides catalyst CCF synthesized by solvothermal method was applied to degrade BPA by activating PMS, showing superior catalytic activity and stability. The systematic investigation on various factors influencing the degradation efficiency of BPA confirmed the potential of CCF in practical wastewater treatment.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Energy & Fuels
A. Arumugam, Gautham B. Jegadeesan, V. Ponnusami
BIOMASS CONVERSION AND BIOREFINERY
(2018)
Article
Materials Science, Multidisciplinary
A. Arumugam, Gopinath Karuppasamy, Gautham B. Jegadeesan
Article
Green & Sustainable Science & Technology
A. Arumugam, D. Thulasidharan, Gautham B. Jegadeesan
Article
Materials Science, Multidisciplinary
G. I. Gunarani, Aditya B. Raman, J. Dilip Kumar, Sravani Natarajan, Gautham B. Jegadeesan
Article
Environmental Sciences
R. Udaykumar, N. Santosh Srinivas, Gautham B. Jegadeesan
WATER AIR AND SOIL POLLUTION
(2020)
Article
Environmental Sciences
S. Rohith, K. Kishore Ramanan, N. Santosh Srinivas, Gautham B. Jegadeesan
WATER AIR AND SOIL POLLUTION
(2020)
Article
Environmental Sciences
Mahalakshmi Mathivanan, Chidambaram Sabarathinam, Prasanna Mohan Viswanathan, Venkatramanan Senapathi, Devaraj Nadesan, Gunarani Gunaseelan Indrani, Gnanasekar Malaimegu, Sahoo Sunil Kumar
Summary: The study revealed high uranium concentrations in groundwater in the semiarid regions of southern India, especially during the post monsoon season. Uranium primarily existed in the form of U3O8 and was associated with high pH values. Redox conditions were identified as the main process facilitating the release mechanism of uranium.
ENVIRONMENTAL RESEARCH
(2022)
Article
Chemistry, Analytical
Gautham B. Jegadeesan, Arockia Jayalatha Kulandaisamy, John Bosco Balaguru Rayappan
Summary: This article describes the use of a fate and transport model and diagnostic ratio analysis to determine the chemical characteristics of polyaromatic hydrocarbons (PAHs) in coal tar and creosote residues in soil. The model provides information on the weathering rates and transport mechanisms of PAHs in two soil types. The diagnostic ratio analysis compares the modelled residues with actual PAH data in contaminated soils, showing a strong correlation and suggesting the model can be used as an additional evidence for source identification.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2022)
Proceedings Paper
Engineering, Civil
G. I. Gunarani, S. P. Chakkravarthy
INTERNATIONAL CONFERENCE ON CIVIL ENGINEERING AND INFRASTRUCTURAL ISSUES IN EMERGING ECONOMIES (ICCIEE 2017)
(2017)
Article
Engineering, Environmental
Gautham B. Jegadeesan, A. Arumugam
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2017)
Article
Engineering, Chemical
Gautham B. Jegadeesan, Shashi B. Lalvani
DESALINATION AND WATER TREATMENT
(2017)
Article
Multidisciplinary Sciences
Gautham B. Jegadeesan, D. Balamurugan, R. Karthik, V. Sri Ananthanarayanan
RESEARCH JOURNAL OF PHARMACEUTICAL BIOLOGICAL AND CHEMICAL SCIENCES
(2016)
Article
Engineering, Chemical
Yongxiang Wu, Nguyen Thi Hong Nhung, Deqian Zeng, Nengneng Luo, Akira Otsuki, Gjergj Dodbiba, Toyohisa Fujita
Summary: This study proposed a novel method for synthesizing flower-like vaterite calcium carbonate using nanobubble-containing ethanol and water mixed solution as the solvent and discussed the formation mechanism of vaterite with different shapes. The synthesized vaterite has significant practical interest in the integrated treatment of wastewater contaminated by heavy metals with effective Cd(II) removal, providing a promising field for studying heavy metal and pollutant adsorption in the liquid phase.
ADVANCED POWDER TECHNOLOGY
(2024)
Article
Engineering, Chemical
Jian Gong, Lipo Cheng, Ming Liu, Jie Jiang, Xiaoduo Ou
Summary: This study investigates the effects of particle shape on the collapse of granular columns using the discrete element method. The results show that particle shape has a significant impact on deposition morphology, energy evolution, and mechanical coordination number. Sphericity and angularity are identified as the most important macroscale factors, while roughness has a weaker microscale influence.
ADVANCED POWDER TECHNOLOGY
(2024)
