Article
Environmental Sciences
Andriani Galani, Daniel Mamais, Constantinos Noutsopoulos, Petra Anastopoulou, Alexia Varouxaki
Summary: Stimulating indigenous microbial communities with reductive agents can effectively reduce hexavalent chromium contamination in aquifers, protecting public health and the environment. The addition of organic carbon and iron electron donors can significantly enhance the reduction rates and the overall removal of Cr(VI) from polluted groundwater.
Article
Environmental Sciences
Rong Xu, Ya-nan Wang, Yingjie Sun, Huawei Wang, Ying Gao, Shupeng Li, Lili Guo, Lei Gao
Summary: The study investigates the role of external sodium acetate (SA) in improving Cr(VI) reduction and stabilization in Cr(VI)-spiked soils. Batch experiments showed that the addition of SA resulted in a decline in soil Cr(VI) content and an increase in the relative abundances of Cr(VI)-reducing microorganisms. Redundancy analysis indicated that pH and SA were the predominant factors affecting the microbial community. Functional prediction suggested that the addition of SA had a positive effect on the metabolism of key substances involved in Cr(VI) microbial reduction.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2023)
Article
Environmental Sciences
Xiao Tan, Yinjie Zhang, Meng Liu, Jinman Cao, Guilan Duan, Jun Cui, Aijun Lin
Summary: In this study, a novel layered double hydroxide was prepared through ultrasonic-assisted co-precipitation method, which can efficiently remove Cr(VI) contamination in water and has good removal effects at different pH ranges. The results of the study indicate that U-Fe/Al-LDH is a promising remediation agent and a feasible method for Cr(VI) removal.
Review
Environmental Sciences
Nazeer Abdul Azeez, Swati Sucharita Dash, Sathyanarayana Naidu Gummadi, Vijaykumar Sudarshana Deepa
Summary: This article discusses the pollution of the environment with toxic heavy metals due to industrialization and modern agricultural practices, with a focus on hexavalent chromium. Various methods, including nano and bioremediation, have been employed to reduce heavy metal concentrations, improving efficiency and lowering costs.
Article
Biochemistry & Molecular Biology
Chunzi Xu, Yunlan Xu, Dengjie Zhong, Haixing Chang, Jiaxin Mou, Hui Wang, Hongyu Shen
Summary: To improve the removal efficiency of Cr (VI) by chitosan, this study successfully synthesized a Zr4+ and glutaraldehyde crosslinked polyethyleneimine functionalized chitosan (CGPZ) composite. The adsorption process of Cr (VI) by CGPZ was found to be a spontaneous endothermic process controlled by entropy. The adsorbent showed good acid-base resistance and regeneration performance. CGPZ can synergistically adsorb Cr (VI) through electrostatic interaction and ion exchange, and then reduce Cr (VI) to Cr (III) and chelate Cr (III) through specific functional groups.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Engineering, Environmental
Shakeel Ahmad, Feilong Gao, Honghong Lyu, Jingkang Ma, Beibei Zhao, Siyu Xu, Cholnam Ri, Jingchun Tang
Summary: This study investigates the removal of hexavalent chromium and nitrobenzene using iron and nitrogen doped biochar composites. The results show that the Fe1-N1-BC1 composite exhibits higher efficiency and stability in pollutant removal, and is capable of simultaneously removing different types of pollutants.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Kaidi Jiang, Jia Zhang, Zhihui Deng, Samuel Barnie, Jingjie Chang, Yawen Zou, Xiangyu Guan, Fei Liu, Honghan Chen
Summary: This study investigated the zoning characteristics of abiotic and biotic effects in a Cr(VI) contaminated natural wetland. The contaminated zone was dominated by chemical reduction by natural organic matters, while the downstream area saw direct microbial reduction of Cr(VI). The transition zone experienced intermittent Cr(VI) presence with indirect reduction by Fe2+.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
Xinru Yang, Peng Liu, Meng Yao, He Sun, Ruxue Liu, Jiayin Xie, Yongsheng Zhao
Summary: The study found that using molasses to remediate Cr(VI)-contaminated groundwater is cost-effective and can effectively avoid secondary contamination. The addition of ascorbic acid can promote the rate of bioremediation, while NaHCO3 can buffer pH changes and promote the precipitation of Cr(III).
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Biotechnology & Applied Microbiology
Jin Yeo, Chang-Gyu Kim, Jun-Hyeong Lee, Eunhye Song, Young-Man Yoon
Summary: This study examined the impact of water potential on anaerobic methane production and the microbial consortium. The water potential of the anaerobic digester ranged from -0.10 to -2.09 MPa, with an average of -1.23 MPa. The results showed that water potential was significantly correlated with various variables, and the methane production and utilization rates decreased as water potential decreased, with inhibition observed from approximately -1.65 MPa. At the microbial community level, the relative abundance of Methanosarcina decreased, while Methanoculleus significantly increased.
FERMENTATION-BASEL
(2023)
Article
Biotechnology & Applied Microbiology
Josefina Plaza-Cazon, Maria Paz Salazar Landea, Edgardo Ruben Donati
Summary: Brown algae, Undaria pinnatifida, proved to be an efficient biosorbent for removing hexavalent chromium from solutions at pH 2. The maximum removal capacity and Langmuir affinity coefficient were determined to be 0.641 mmol.g-1 and 29.1 L.mmol(-1), respectively. FTIR and XPS analyses confirmed the presence of both Cr(III) and Cr(VI) on the biomass, suggesting a sorption-reduction-desorption mechanism. This study highlights the potential use of this invasive algae as a low-cost option for treating industrial effluents containing Cr(VI).
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2022)
Article
Engineering, Environmental
Ruixin Yan, Xiuping Feng, Long Kong, Qun Wan, Weilin Zheng, Takeshi Hagio, Ryoichi Ichino, Xinde Cao, Liang Li
Summary: A novel composite material FeS/HTs was synthesized and demonstrated high efficiency in removing hexavalent chromium from water. The superior adsorption capacity of FeS/HTs, attributed to the combination of abundant adsorption sites and powerful reduction properties, suggests potential applications in chromium removal.
CHEMICAL ENGINEERING JOURNAL
(2021)
Editorial Material
Environmental Sciences
Hanui Yang, Namgyu Kim, Donghee Park
Summary: Review papers are important for researchers to align their research and for beginners to quickly gain relevant knowledge. This particular review paper by Othmani et al. (2022) focuses on the adsorptive removal of three harmful pollutants using agricultural waste materials. However, the section related to Cr(VI) removal lacks important information regarding the redox reaction mechanism involved. It is crucial to interpret the factors affecting Cr(VI) removal in terms of the redox reaction concept rather than simple anion adsorption.
ENVIRONMENTAL RESEARCH
(2023)
Article
Engineering, Environmental
Chunzi Xu, Yunlan Xu, Dengjie Zhong, Haixing Chang, Jiaxin Mou, Hui Wang, Hongyu Shen
Summary: This study successfully synthesized Zr4+-crosslinked magnetic chitosan/polyaniline composite for the first time and used it to remove Cr(VI) from aqueous solution. The composite material exhibited high adsorption capacity, excellent stability, and regeneration ability, and showed good performance in Cr(VI) removal.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Christiana Mystrioti, Stefania Koursari, Anthimos Xenidis, Nymphodora Papassiopi
Summary: The study demonstrates that gallic acid is effective in rapidly reducing Cr(VI) to Cr(III) in mild acidic conditions, following 2nd order kinetics in the pH range 3-5, with a different reduction mechanism observed at pH 5 and pH 6.
Article
Environmental Sciences
Minzhang Li, Qikun Hu, Haiquan Shan, Wenjian Yu, Zong-Xiang Xu
Summary: The combination of CuPc and N-CuMe2Pc with rGO to form CuPc/rGO and N-CuMe2Pc/rGO nanocomposites significantly improves the removal efficiency of Cr(VI), with N-CuMe2Pc/rGO exhibiting higher specific surface area, higher light harvesting, higher conductivity, and more negative lowest unoccupied molecular orbital level.
Article
Engineering, Chemical
J. A. Barrios, F. E. Solis-Caballero, A. Cano, U. Duran, G. Orozco, F. F. Rivera
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2019)
Article
Biotechnology & Applied Microbiology
Karina G. Coronado-Apodaca, Miguel Vital-Jacome, German Buitron, Guillermo Quijano
BIOCHEMICAL ENGINEERING JOURNAL
(2019)
Article
Environmental Sciences
M. Perez-Rodriguez, A. Cano, U. Duran, J. A. Barrios
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2019)
Article
Engineering, Environmental
Perla A. Gonzalez-Tineo, Ulises Duran-Hinojosa, Liliana R. Delgadillo-Mirquez, Edna R. Meza-Escalante, Pablo Gortares-Moroyoqui, Ruth G. Ulloa-Mercado, Denisse Serrano-Palacios
JOURNAL OF WATER PROCESS ENGINEERING
(2020)
Article
Biotechnology & Applied Microbiology
J. A. Barrios, A. Cano, F. F. Rivera, M. E. Cisneros, U. Duran
Summary: The study investigated the effects of initial total solids concentrations [TS] of WAS and current density (CD) during Electrooxidation pre-treatment (EOP) with boron-doped diamond (BDD) electrode on methane production and removal of chemical oxygen demand (COD) and volatile solids (VS). The results showed that the highest COD and VS removal were achieved when working with WAS at 3% of [TS] pre-treated at a current density of 24.1 mA/cm(2), leading to maximum methane production and positive energy balance. The study highlighted the importance of understanding operational parameters in improving pre-treatment and anaerobic digestion performances.
BIOTECHNOLOGY FOR BIOFUELS
(2021)
Article
Engineering, Environmental
Ulises Duran, Oscar Monroy, Jorge Gomez, Florina Ramirez
Summary: Methanogenic-aerobic coupled processes were used to provide evidence of oxygen role for complete elimination of vinyl acetate (VA). The study showed that VA can be efficiently removed through simultaneous methanation and aerobic respiration. Brevibacillus agri and Methanosarcina barkeri were identified as key species responsible for VA elimination. Oxygen and VA concentration had selective effects on the metabolism and population dynamics.
WATER ENVIRONMENT RESEARCH
(2022)
Article
Multidisciplinary Sciences
P. Gonzalez-Tineo, A. Aguilar, A. Reynoso, U. Duran, M. Garzon-Zuniga, E. Meza-Escalante, L. Alvarez, D. Serrano
Summary: This study evaluates two different support media for the treatment of swine wastewater and finds that the polyethylene rings serve as a more efficient carrier. The tests indicate that suspended biomass plays a larger role in nitrogen removal, and the presence of Pseudomonas genus dominates the microbial community.
SCIENTIFIC REPORTS
(2022)
Review
Biochemistry & Molecular Biology
Manuel Martinez-Ruiz, Carlos Alberto Martinez-Gonzalez, Dong-Hyun Kim, Berenice Santiesteban-Romero, Humberto Reyes-Pardo, Karen Rocio Villasenor-Zepeda, Edgar Ricardo Melendez-Sanchez, Diana Ramirez-Gamboa, Ana Laura Diaz-Zamorano, Juan Eduardo Sosa-Hernandez, Karina G. Coronado-Apodaca, Ana Maria Gamez-Mendez, Hafiz M. N. Iqbal, Roberto Parra-Saldivar
Summary: This review summarizes the potential cosmeceutical applications of microalgae-derived biomolecules, their mechanisms of action, and extraction methods.
Article
Engineering, Environmental
German Buitron, Karina G. Coronado-Apodaca
Summary: This paper evaluated the influence of solids retention time (SRT) on the formation of microalgal-bacterial aggregates during the treatment of municipal wastewater in continuous high-rate algal ponds (HRAP). The results showed that increasing the SRT favored solids separation, but had no effect on COD removal and chemical composition. The best removal of nitrogen, phosphorous and suspended solids was achieved at an SRT of 12 days.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Biotechnology & Applied Microbiology
L. Delgadillo-Mirquez, P. Gonzalez-Tineo, D. Serrano, U. Duran
Summary: Limited studies have investigated the effects of antibiotics on acetoclastic methanogenesis and swine wastewater biodegradability. This study evaluated the inhibition effects of oxytetracycline, tetracycline, and tylosin individually and in combination on methane production, specific methanogenic activity, and biodegradability. The results showed that antibiotics have a greater impact on specific methanogenic activity and biodegradability than methane production, and the inhibition was proposed as uncompetitive.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2022)
Review
Environmental Sciences
Rafael G. Araujo, Jesus A. Rodriguez-Hernandez, Reyna Berenice Gonzalez-Gonzalez, Rodrigo Macias-Garbett, Manuel Martinez-Ruiz, Humberto Reyes-Pardo, Saul Antonio Hernandez Martinez, Lizeth Parra-Arroyo, Elda M. Melchor-Martinez, Juan Eduardo Sosa-Hernandez, Karina G. Coronado-Apodaca, Sunita Varjani, Damia Barcelo, Hafiz M. N. Iqbal, Roberto Parra-Saldivar
Summary: PFAS are anthropogenic chemicals used in various products, characterized by their low degradability and resistance to water, oil, and heat. They persist in the environment and accumulate in organisms, causing adverse effects. Detection and removal technologies for PFAS are of high concern. This study analyzes the mechanisms and adverse effects of PFAS, and reviews recent advances in detection and removal methods.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Review
Biochemistry & Molecular Biology
Diana Ramirez-Gamboa, Ana Laura Diaz-Zamorano, Edgar Ricardo Melendez-Sanchez, Humberto Reyes-Pardo, Karen Rocio Villasenor-Zepeda, Miguel E. Lopez-Arellanes, Juan Eduardo Sosa-Hernandez, Karina G. Coronado-Apodaca, Ana Gamez-Mendez, Samson Afewerki, Hafiz M. N. Iqbal, Roberto Parra-Saldivar, Manuel Martinez-Ruiz
Summary: This study presents the functions, characteristics, and types of photolyases, their therapeutic and cosmetic applications, and additionally explores some photolyase-producing microorganisms and drug delivery systems.
Article
Engineering, Mechanical
Leonardo I. Farfan-Cabrera, Alejandro Rojo-Valerio, Juan de Dios Calderon-Najera, Karina G. Coronado-Apodaca, Hafiz M. N. Iqbal, Roberto Parra-Saldivar, Mariana Franco-Morgado, Alex Elias-Zuniga
Summary: This article discusses the potential use of microalgae oils in metal working fluids (MWFs) for minimum quantity lubrication operations. The review focuses on the development of microalgae oils with high levels of saturated, monounsaturated, and polyunsaturated fatty acids. The article concludes that microalgae oils have significant potential as sustainable and eco-friendly base oils for producing MWFs, but further research is needed in areas such as agro-industry wastewater utilization, green harvesting, oil extraction methods, and replacement of toxic additives with green nanoparticles and biopolymers for truly green machining processes.
Article
Chemistry, Medicinal
Itzel Y. Lopez-Pacheco, Victoria Guadalupe Ayala-Moreno, Catherinne Arlette Mejia-Melara, Jose Rodriguez-Rodriguez, Sara P. Cuellar-Bermudez, Reyna Berenice Gonzalez-Gonzalez, Karina G. Coronado-Apodaca, Leonardo I. Farfan-Cabrera, Georgia Maria Gonzalez-Meza, Hafiz M. N. Iqbal, Roberto Parra-Saldivar
Summary: The production of biomolecules by microalgae has a wide range of applications, and microalgae biomass can be produced using waste in a smaller space, showing its great potential as a source of biomass.
Article
Environmental Sciences
E. D. Peralta, A. Noyola, J. A. Barrios, U. Duran
REVISTA INTERNACIONAL DE CONTAMINACION AMBIENTAL
(2018)
