Article
Environmental Sciences
Manuel Dutschke, Tobias Schnabel, Frank Schuetz, Christian Springer
Summary: In this study, an experimental setup was developed to apply advanced oxidation processes to real groundwater, resulting in promising degradation rates of organic pollutants. Through parameter optimization, high degradation rates were achieved without the formation of transformation products.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Review
Engineering, Environmental
Kaixiong Yang, Yi-Jie Kong, Li-Zhi Huang, Xin-Ming Hu
Summary: This review systematically summarizes the recent development in catalytic degradation of chlorinated organic pollutants (COPs) using various single-atom catalysts (SACs). It focuses on understanding the structure-performance relationships and key mechanisms involved, evaluating the dechlorination and oxidation processes of COPs, and discussing the synergic reduction-oxidation degradation process. The review also proposes possible solutions to existing challenges, aiming to inspire and guide the future applications of SACs in COPs elimination.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Xin Ni Law, Wai Yan Cheah, Kit Wayne Chew, Mohamad Faizal Ibrahim, Young-Kwon Park, Shih-Hsin Ho, Pau Loke Show
Summary: Microalgae are attracting attention for their potential biorefinery use or value-added products, with their biomass being converted into volatile biochar through recommended thermochemical conversion techniques. The resulting biochar has desirable properties such as high surface area and pore volume, abundant surface functional groups, and high adsorption capacity. The characteristics of biochar significantly influence the adsorption mechanisms of pollutants from wastewaters, with specific adsorption of organic and inorganic pollutants being reviewed in terms of capacity and efficiency. Future challenges and improvements in the application of microalgal-based biochar in wastewater treatment are also discussed.
ENVIRONMENTAL RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
Paolo Ciampi, Carlo Esposito, Ernst Bartsch, Eduard J. Alesi, Christian Nielsen, Laura Ledda, Laura Lorini, Marco Petrangeli Papini
Summary: The presence of chlorinated solvents polluting groundwater in urbanized areas is a significant environmental issue. This paper presents a comprehensive approach to remediate the contamination, using two distinct remediation technologies. The development of an integrated conceptual site model helps understand the hydrogeochemical characteristics of the site and support decision-making. Hydrochemical monitoring during the remediation process allows for the evaluation of strategy performance and investigation of possible rebound effects.
Review
Environmental Sciences
Eliasu Issaka, Jesse Nii-Okai Amu-Darko, Salome Yakubu, Funmilayo Omotoyosi Fapohunda, Nisar Ali, Muhammad Bilal
Summary: The advanced catalytic ozonation process shows significant effectiveness in removing refractory organic compounds and degrading toxic organic pollutants in wastewater. Heterogeneous catalytic ozonation can effectively overcome the disadvantages of homogeneous catalytic ozonation, providing higher catalytic stability and efficiency.
Article
Engineering, Environmental
Yanyan Zhang, Pinar Ozcer, Subhasis Ghoshal
Summary: The sulfidation of nanoscale zerovalent iron (S-nZVI) enhances the degradation efficiency of various chlorinated hydrocarbons (CHCs) in groundwater, with the most significant improvement observed for chlorinated ethenes. Under electron limited conditions, S-nZVI enables either higher or comparable maximum degradation quantity for all CHCs investigated, indicating its promise for remediating groundwater contaminated by CHC mixtures. Sulfidation suppresses the generation of partially dechlorinated products and favors degradation pathways leading to non-chlorinated benign products, providing valuable insight for the assessment of S-nZVI applicability and benefits in CHC remediation.
Article
Chemistry, Multidisciplinary
Mingda Che, Hongjian Su, Xudong Zhao, Daqing Fu, Renliang Huang, Xuehui Guo, Rongxin Su
Summary: A new TCE removal system using tannic acid (TA) to activate persulfate (PS) with ferrous iron (Fe(II)) has been developed and shown to have excellent removal performance for TCE.
Article
Chemistry, Physical
Yiqing Li, Manqin Fu, Xiaoxia Zhang, Chun He, Dingsheng Chen, Ya Xiong, Liqing Guo, Shuanghong Tian
Summary: In this study, CuOx nanoclusters supported on anatase TiO2 nanotubes (NT) were successfully prepared, showing high reactivity in catalytic applications. CuOx/NT catalyst demonstrated a higher reaction rate constant in ozonation compared to NT catalyst and ozonation alone, and it generated abundant reactive oxygen species. The results provide valuable insights for designing and preparing highly reactive nanoclusters of metal oxide catalysts for catalytic ozonation of refractory organic pollutants.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Engineering, Environmental
Yalan Mo, Jiang Xu, Lizhong Zhu
Summary: This study reveals the influence of sulfidized nanoscale zerovalent iron (SNZVI) on the dechlorination reactivity and selectivity of chlorinated ethenes (CEs). SNZVI exhibits significantly improved dechlorination reactivity and selectivity compared to zerovalent iron, depending on the chlorine number, chlorine position, and sulfur content of the CEs. By controlling the sulfidation degree of SNZVI, the dechlorination pathway and reactivity of CEs can be altered. These findings are important for the rational design of SNZVI for in situ groundwater remediation of various CEs.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Longwei Yin, Longjie Liu, Shen Lin, Gary Owens, Zuliang Chen
Summary: This paper investigates the simultaneous removal of arsenite and arsenate from groundwater using zero-valent iron nanoparticles (nZVI). The results show that nZVI can efficiently remove both species, and practical application also yields good results. The presence of other coexisting ions, such as phosphate and carbonate, affects the removal efficiency.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Environmental
Xin Hong Tai, Chin Wei Lai, Thomas Chung Kuang Yang, Mohd Rafie Johan, Kian Mun Lee, Chia-Yun Chen, Joon Ching Juan
Summary: The combination of photoreduced graphene oxide (PRGO) and titanium dioxide (TiO2) as a p-n heterojunction photocatalyst has shown effective removal of volatile organic compounds (VOCs) indoors. The photocatalyst exhibits enhanced photoactivity under both UV and visible light, attributed to its larger built-in potential and smaller band gap.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Gonzalo Alejandro Escareno-Torres, Jose Alfonso Pinedo-Escobar, David Alejandro De Haro-Del Rio, Patricia Becerra-Castaneda, Daniel G. Araiza, Horacio Inchaurregui-Mendez, Cristina Jared Carrillo-Martinez, Luis Mario Gonzalez-Rodriguez
Summary: In this study, ternary photocatalysts comprising TiO2/SnO2/g-C3N4 were synthesized for the degradation of ciprofloxacin (CIP) in water. Various techniques were used to characterize the photocatalysts, and photocatalytic degradation tests of CIP were carried out under different radiation sources. The results showed that the P25/npA/g-C3N4 (90/10) material exhibited the best performance, achieving CIP degradation of over 97%.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Nanoscience & Nanotechnology
Samiksha Gandhi, Aditi Halder, Ravinder Kaushik
Summary: The increasing world population has spurred a greater need for safe drinking water and sustainable energy production. To address these challenges, researchers have developed a bifunctional photoelectrocatalytic system that combines the degradation of water pollutants with hydrogen gas production. This system showed high efficiency in degrading rhodamine molecules and producing hydrogen gas simultaneously. The prepared composite also exhibited enhanced visible-light absorbance, charge generation capability, and charge transfer resistance compared to bare titania. This catalyst offers a promising solution for wastewater treatment and renewable energy production.
ACS APPLIED NANO MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Chan Zheng, Jian Lin, Xiaoyi Song, Qingbao Gan, Xiaoying Lin
Summary: In this study, a novel microcleaner was designed for efficient degradation of organic pollutants through its photocatalytic ability. The microcleaner, with an open-mouth, hollow, asymmetric structure, showed high efficiency in removing rhodamine B, with a removal rate of 98% in the first 10 minutes. The velocity of the microcleaner can be controlled by adjusting the UV irradiation intensity and H2O2 concentration.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Physical
Stefano Andrea Balsamo, Roberto Fiorenza, Marcello Condorelli, Roberta Pecoraro, Maria Violetta Brundo, Francesca Lo Presti, Salvatore Scire
Summary: A non-conventional method using solar photoreduction to prepare TiO2-rGO nanocomposites was proposed, simplifying the synthesis process and enhancing the photocatalytic efficiency. The composites showed excellent degradation performance in the photodegradation of 2,4-D, indicating promising applications in environmental remediation.
