Article
Chemistry, Physical
Nayara Balaba, Dienifer F. L. Horsth, Jamille de S. Correa, Julia de O. Primo, Silvia Jaerger, Helton J. Alves, Carla Bittencourt, Fauze J. Anaissi
Summary: Three synthesis routes using different natural polysaccharides as fuels and complexing agents were described for obtaining MgO. XRD identified the formation of a monophasic periclase structure for the three samples. BET analysis showed a significant difference in textural properties, with the highest pore volume and surface area obtained for MgO-St. The synthesized magnesium oxides displayed the ability to reduce the amount of Cu2+ ions in wastewater.
Article
Chemistry, Physical
Junsheng Chen, Hao Li, Shuangming Chen, Jingyuan Fei, Chang Liu, Zixun Yu, Kihyun Shin, Zongwen Liu, Li Song, Graeme Henkelman, Li Wei, Yuan Chen
Summary: This study investigates the effect of doping chromium on the activity of cobalt (oxy)hydroxide catalysts through a combination of DFT calculations and catalyst characterization. The results show that the optimal Co5Fe3Cr2 (oxy)hydroxide exhibits superior performance in terms of high current density and turnover frequency. Analysis from X-ray absorption and photoelectron spectroscopies reveals that chromium promotes the distribution of cobalt atoms and modifies the electronic structure. Quasi-operando electron energy loss spectroscopy confirms that chromium accelerates the oxidation of Co2+ to higher valence species, leading to significantly higher catalytic activity.
ADVANCED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Yu Zhang, Hong Zheng, Pengyi Zhang, Qi Zuo, Baichao Zhang, Zhi Geng, Yanan Yang, Xueying Ren
Summary: A novel post coordination modulation method was studied to synthesize ZIF-8 functionalized by 2,5-Dimercapto-1,3,4-thiadiazole (Post-ZIF-8-DMTD) for trace heavy metals removal from drinking water. The addition amount of DMTD had a significant impact on the structure and adsorption performance of Post-ZIF-8-DMTD. Post-ZIF-8-DMTD exhibited excellent purification capability and potential application in drinking water purification.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Environmental
Siyuan Pan, Jialin Shen, Ziniu Deng, Xiaolin Zhang, Bingcai Pan
Summary: This study successfully prepared a nanocomposite ZrP@N001 by incorporating ultrafine ZrP into a commercially available gel-type cation exchanger, demonstrating higher adsorption efficiency and selectivity for heavy metals compared to conventional methods.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Chemistry, Physical
Huan Zhang, Xin Fan, Xiangyu Liu, Qingdong He, Wenting Zhao, Lei Han, Jingjing Cui, Fang Guo, Wenbo Wang
Summary: A green, low-cost and powerful adsorbent named MCSiMg49 was developed to purify wastewater containing low or high concentrations of lead ions. The adsorbent has a high specific surface area and can completely remove lead ions from natural water, making it ideal for drinking water purification.
APPLIED CLAY SCIENCE
(2023)
Article
Environmental Sciences
Monica M. Arienzo, Daniel Saftner, Steven N. Bacon, Erika Robtoy, Iva Neveux, Karen Schlauch, Michele Carbone, Joseph Grzymski
Summary: Privately-owned domestic wells are the main source of drinking water in rural Nevada. Since the water from these wells is unregulated, it is crucial for owners to test their groundwater for heavy metals and contaminants. A study conducted in Nevada found elevated levels of arsenic, lead, cadmium, and uranium in groundwater from private wells, which poses a public health concern. Treatment systems can reduce metal concentrations, but some still exceeded recommended guidelines. Continued education and outreach on testing, proper treatment, and health effects are important.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Chemistry, Multidisciplinary
Jing Du, Hong Zhang, Wei Hu, Zelong Li, Wensheng Gao, Xiaomei Wang, Can Li
Summary: This study reports a method for preparing grain-boundary-rich Ni-Fe (oxy)hydroxide catalysts on nickel foam using a scalable coating approach and a chemical precipitating treatment. The method effectively assembles hierarchical Ni-Fe (oxy)hydroxide nanosheets with rich grain boundaries. The hierarchical nanosheets with abundant grain boundaries provide more accessible catalytic sites and facilitate charge and mass transfer. The prepared Ni-Fe (oxy)hydroxide electrode exhibits high current densities for the oxygen evolution reaction at low overpotentials and shows long-term durability in alkaline conditions.
Article
Engineering, Environmental
Li Yu, Yuchan Li, Yuefei Ruan
Summary: The study demonstrated the manipulation of selectivity in layered oxides by controlling the dynamic evolution of adsorptive sites, achieving superior adsorption selectivity for lead ions. Assembly of ultrathin MnO2 nanosheets on magnetic iron oxides enhanced accessibility to lateral edge sites (LESs), while ligand-promoted reduction facilitated migration of Mn atoms from edges to interlayers, activating LESs and blocking nonspecific octahedral vacancy sites (OVSs). This multifunctional adsorptive/electrosensing platform showed satisfactory stability and sensitivity for selective adsorption and on-site monitoring of Pb(II) without matrix interference.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Inorganic & Nuclear
Ru Yang, Xiaolin Yu, Baotong Xu, Wei Yao, Vladimir P. Fedin, Andrei S. Potapov, Enjun Gao
Summary: Researchers synthesized a 3D honeycomb Zn-MOF material, which has excellent luminescent properties and rapid separation ability for dye molecules of different sizes. This material can also simultaneously and selectively detect three heavy metal ions in water. The maximum adsorption capacities of Zn-MOF for cationic organic dyes CV, RHB, and JB are 233 mg/g, 218 mg/g, and 168 mg/g, respectively.
Article
Chemistry, Physical
Yueying Li, Wei Hua, Yanhao Guo, Shiyu Liang, Boxin Li, Liang Wang, Jian-Gan Wang
Summary: Surface Fe with low-coordination is crucial for the performance of OER catalysts. This study presents a new S-incorporation and ligand anchoring strategy to synthesize Fe-enriched OER catalysts in situ. The co-etching of S elements and ligands enables the formation of Fe-enriched trimetallic (oxy)hydroxide OER catalysts. The catalyst exhibits a remarkably low overpotential and excellent stability, making it a promising candidate for advanced OER catalysts.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Engineering, Chemical
Menglan Zhao, Yu Wang, Hui Zhao, Zihan Zhang, Juntong Su, Xu Ma, Fanping Kong, Yuan Xie, Zequn Ma, Qian Zhang, Zilin Meng
Summary: Dithiocarbamate-modified Mg-Al layered double hydroxides (LDH-DTC) were found to effectively adsorb heavy metal contaminants from soil. The DTC molecules were completely wrapped around the LDHs layer, and the thickness of the coating layer increased with the molecular weight of DTC. The adsorption of heavy metals onto LDH-DTC followed pseudo-second-order and intraparticle diffusion models, and the adsorption isotherms suggested different adsorption mechanisms for different heavy metals. LDH-DTC showed high stability and efficient interception of heavy metals, making it a promising method for immobilizing heavy metals in soil.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Review
Water Resources
Bharti, J. S. Jangwan, Smita S. Kumar, Vivek Kumar, Amrish Kumar, Dushyant Kumar
Summary: This paper discusses the issues of heavy metals and pesticides in water decontamination, and introduces the latest research results of adsorption and photocatalysis as two removal methods.
APPLIED WATER SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Vincenzo Ortone, Laura Matino, Francesca Santoro, Stefano Cinti
Summary: This novel platform utilizes two merged paper-based substrates for programmable pre-concentration of analytes and electrochemical detection of mercury traces in drinking water. It represents a versatile possibility in merging humble materials to maximize their impacts on analytical and remediation challenges.
CHEMICAL COMMUNICATIONS
(2021)
Article
Environmental Sciences
Sahar Taheri, Mohammad Sedghi-Asl, Mehrorang Ghaedi, Zarin Mohammadi-Asl, Mohammad Rahmanian
Summary: A new adsorbent was synthesized and used for efficient removal of copper (II) and nickel (II) ions from aqueous samples. The adsorbent was characterized through various techniques, including FT-IR, XRD, FE-SEM, Energy-dispersive X-ray spectroscopy, and VSM. The synthesized adsorbent showed a layered structure and had sufficient magnetic strength for easy separation from the sample solution by an external magnet.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Chemistry, Physical
Amal M. M. Elewa, Ahmed A. A. Amer, Mohamed F. F. Attallah, Hamdy A. A. Gad, Zehbah Ali Mohamed Al-Ahmed, Inas A. A. Ahmed
Summary: Rice husk was converted into activated carbon using an electric furnace and chemically activated with three different processes. The adsorption capacities of Fe(III) and Mn(II) differed significantly among the activated carbon samples, with AC(C-3) showing the best performance. The adsorption process was affected by various operational factors, and the kinetics and thermodynamics of the process were evaluated. The maximum adsorption capacities of Fe(III) and Mn(II) were 28.9 and 73.47 mg/g, respectively.
Article
Engineering, Environmental
T. Asimakidou, A. Makridis, S. Veintemillas-Verdaguer, M. P. Morales, I Kellartzis, M. Mitrakas, G. Vourlias, M. Angelakeris, K. Simeonidis
CHEMICAL ENGINEERING JOURNAL
(2020)
Review
Engineering, Chemical
A. J. Karabelas, S. T. Mitrouli, M. Kostoglou
Article
Engineering, Chemical
C. P. Koutsou, E. M. Kritikos, A. J. Karabelas, M. Kostoglou
Article
Environmental Sciences
Kyriaki Kalaitzidou, Loukas Bakouros, Manassis Mitrakas
Article
Chemistry, Physical
Evgenios Kokkinos, Chasan Chousein, Konstantinos Simeonidis, Sandra Coles, Anastasios Zouboulis, Manassis Mitrakas
Article
Biochemistry & Molecular Biology
Dimitra C. Banti, Manassis Mitrakas, Petros Samaras
Summary: Adjusting operating parameters effectively controlled filamentous bacteria, improved membrane performance, reduced membrane fouling, and enhanced MBR efficiency.
Article
Biochemistry & Molecular Biology
Petros Gkotsis, Dimitra Banti, Anastasia Pritsa, Manassis Mitrakas, Petros Samaras, Efrosini Peleka, Anastasios Zouboulis
Summary: This study investigated the impact of operating conditions on membrane fouling in Membrane Bio-Reactors treating municipal wastewater, focusing on controlling filamentous microorganisms and minimizing dissolved oxygen to improve denitrification. By adjusting DO, F/M ratio, and temperature, filament growth was regulated. Keeping concentrations of Soluble Microbial Products and colloids low in the mixed liquor helped reduce membrane fouling, while lowering DO in recycled sludge improved denitrification and resulted in lower nitrogen concentrations in the effluent.
Article
Environmental Sciences
E. Pagona, K. Kalaitzidou, A. Zouboulis, M. Mitrakas
Summary: The addition of MgO in mining wastes can enhance the refractoriness, promote the formation of desirable olivine, and eliminate undesirable minerals.
WASTE AND BIOMASS VALORIZATION
(2022)
Article
Chemistry, Multidisciplinary
Kyriaki Kalaitzidou, Evangelia Pagona, Paraskevas Stratigousis, Xanthi Ntampou, Vasileios Zaspalis, Anastasios Zouboulis, Manassis Mitrakas
Summary: This study focuses on the refractory upgrade and reuse of mining wastes/by-products. The addition of hematite nanomaterial can improve the refractory properties of products, while thermal pre-treatment does not have significant benefits.
APPLIED SCIENCES-BASEL
(2022)
Article
Environmental Sciences
Chrysovalantou Koutsiantzi, Manassis Mitrakas, Anastasios Zouboulis, Ioannis Kellartzis, George Stavropoulos, Eustathios S. Kikkinides
Summary: This study evaluates the separation performance of a commercially available polymeric membrane for upgrading biogas. The experimental results show that increasing the feed pressure can improve methane purity but reduce methane recovery. Multiple membrane modules are needed to improve purity.
Article
Materials Science, Multidisciplinary
K. Kalaitzidou, E. Pagona, A. Zouboulis, M. Mitrakas
Summary: The optimum firing process for improving the refractoriness of mining samples mixed with ROM was investigated. The results showed that firing at 1300 degrees C for 120 min produced the best results, with minimum firing shrinkage, water absorption, and apparent porosity, and maximum bulk density and mechanical strength. The XRD patterns revealed changes in mineral phases during the firing process.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Environmental Sciences
Matthias Bannenberg, Maria Margarita Ntona, Gianluigi Busico, Kyriaki Kalaitzidou, Manassis Mitrakas, George Vargemezis, Ilias Fikos, Nerantzis Kazakis, Konstantinos Voudouris
Article
Engineering, Environmental
Efthimia Kaprara, Margaritis Kostoglou, Chrysovalantou Koutsiantzi, Savvina Psaltou, Anastasios Zouboulis, Manassis Mitrakas
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2020)
Article
Biochemistry & Molecular Biology
Petros Gkotsis, Anastasios Zouboulis, Manassis Mitrakas
Article
Engineering, Environmental
Kyriaki Kalaitzidou, Anastasios Zouboulis, Manassis Mitrakas
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2020)