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Zhao H, Song F, Su F, Shen Y, Li P. Removal of Cadmium from Contaminated Groundwater Using a Novel Silicon/Aluminum Nanomaterial: An Experimental Study. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2021; 80:234-247. [PMID: 33222007 DOI: 10.1007/s00244-020-00784-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Accepted: 11/01/2020] [Indexed: 06/11/2023]
Abstract
Cadmium (Cd) is a harmful element to human health and biodiversity. The removal of Cd from groundwater is of great significance to maintain the environmental sustainability and biodiversity. In this work, a novel low-temperature roasting associated with alkali was applied to synthesize an eco-friendly adsorbent using coal fly ash. Scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray fluorescence, and X-ray photoelectron spectroscopy were applied to analyze the physical and chemical characteristics of the adsorbent. The experiments show that a significant improvement in specific surface area and activity of adsorbent was observed in this study. The functional groups of Na-O and Fe-O were verified to be beneficial in the removal of Cd2+. The material capacity to adsorb Cd2+ was considerably improved, and the maximum uptake capacity was 61.8 mg g-1 for Cd2+ at 25 °C. Furthermore, pH and ionic strength play critical roles in the adsorption process. The Langmuir and pseudo-second-order models can appropriately describe the adsorption behavior, and the enhanced adsorption ability of Cd2+ by modified coal fly ash was attributed to ion-exchange, co-precipitation, and complexation. Higher sorption efficiency was maintained after two regeneration cycles. These results offer valuable insights to develop high-performance adsorbent for Cd2+ removal.
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Affiliation(s)
- Hanghang Zhao
- School of Water and Environment, Chang'an University, No. 126 Yanta Road, Xi'an, 710054, Shaanxi, China
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of the Ministry of Education, Chang'an University, No. 126 Yanta Road, Xi'an, 710054, Shaanxi, China
| | - Fengmin Song
- School of Chemistry and Environmental Science, Shaanxi University of Technology, Hanzhong, 723001, Shaanxi, China
| | - Fengmei Su
- School of Water and Environment, Chang'an University, No. 126 Yanta Road, Xi'an, 710054, Shaanxi, China
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of the Ministry of Education, Chang'an University, No. 126 Yanta Road, Xi'an, 710054, Shaanxi, China
| | - Yun Shen
- School of Water and Environment, Chang'an University, No. 126 Yanta Road, Xi'an, 710054, Shaanxi, China
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of the Ministry of Education, Chang'an University, No. 126 Yanta Road, Xi'an, 710054, Shaanxi, China
| | - Peiyue Li
- School of Water and Environment, Chang'an University, No. 126 Yanta Road, Xi'an, 710054, Shaanxi, China.
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of the Ministry of Education, Chang'an University, No. 126 Yanta Road, Xi'an, 710054, Shaanxi, China.
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Kim SD, Choe WG, Choi J, Jeong JR. Preparation and characterization of silver coated magnetic microspheres prepared by a modified electroless plating process. POWDER TECHNOL 2019. [DOI: 10.1016/j.powtec.2018.09.094] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Verma SK, Jha E, Panda PK, Das JK, Thirumurugan A, Suar M, Parashar S. Molecular aspects of core-shell intrinsic defect induced enhanced antibacterial activity of ZnO nanocrystals. Nanomedicine (Lond) 2017; 13:43-68. [PMID: 29173091 DOI: 10.2217/nnm-2017-0237] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
AIM To investigate molecular aspects of the antibacterial effect of size-dependent core-shell intrinsic defects of nanocrystalline ZnO synthesized through high energy ball milling technique. MATERIALS & METHODS Mechanically synthesized and characterized 7, 10 and 15 h milled ZnO nanoparticles were evaluated for antibacterial activity with molecular investigation by computational molecular docking. RESULTS Synthesized ZnO nanoparticles displayed shrinkage of core and increase of shell with reduction in size of bulk ZnO particles from 250 to 80, 40 and 20 nm and increase in zeta potential up to -19 mV in 7, 10 and 15 h nano ZnO. Antibacterial activity was found increased with decrease in size due to increased reactive oxygen species and membrane damage in bacteria. CONCLUSION Synthesized nano ZnO exhibit size-dependent antibacterial action as consequences of interactions with cell membrane proteins via hydrogen bond interaction with amino acid residues followed by internalization, membrane depolarization and induction of reactive oxygen species generation.
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Affiliation(s)
- Suresh K Verma
- School of Biotechnology, KIIT University, Bhubaneswar, Orissa, 751024, India
| | - Ealisha Jha
- Memorial University of Newfoundland, Department of Physics & Physical Oceanography, St. John's, Newfoundland & Labrador, NL A1C 5S7 Canada
| | - Pritam Kumar Panda
- School of Biotechnology, KIIT University, Bhubaneswar, Orissa, 751024, India
| | - Jugal K Das
- School of Biotechnology, KIIT University, Bhubaneswar, Orissa, 751024, India
| | - Arun Thirumurugan
- Advanced Materials Laboratory, Department of Mechanical Engineering, Faculty of Mathematical & Physical Sciences, University of Chile, Santiago, Chile
| | - Mrutyunjay Suar
- School of Biotechnology, KIIT University, Bhubaneswar, Orissa, 751024, India
| | - Sks Parashar
- School of Applied Sciences, KIIT University, Bhubaneswar, Orissa, 751024, India
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Wang W, Li Q, Zhai J. Electroless plating of copper on fly ash cenospheres using polyaniline-Pd activation. SURF INTERFACE ANAL 2012. [DOI: 10.1002/sia.5156] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Wei Wang
- State Key Laboratory of Pollution Control and Resource Reuse, and School of the Environment; Nanjing University; Nanjing 210046 P. R. of China
| | - Qin Li
- State Key Laboratory of Pollution Control and Resource Reuse, and School of the Environment; Nanjing University; Nanjing 210046 P. R. of China
| | - Jianping Zhai
- State Key Laboratory of Pollution Control and Resource Reuse, and School of the Environment; Nanjing University; Nanjing 210046 P. R. of China
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Byeon JH, Kim JW. Fabrication of a pure, uniform electroless silver film using ultrafine silver aerosol particles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:11928-11933. [PMID: 20557075 DOI: 10.1021/la101241x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
To obtain evenly distributed pure Ag particles with a narrow size distribution on a polymer membrane, a novel activation procedure with an environmentally friendly, cost-effective method was utilized as a pretreatment before electroless Ag deposition. The pretreatment was first performed on an untreated membrane surface by collecting ultrafine ambient spark-generated Ag aerosol particles. After annealing, the electroless Ag film was fabricated on the collected aerosol particles in the Ag electroless bath. Experimental characterizations showed that the ultrafine Ag particles were uniformly anchored onto the membrane surface through pretreatment, resulting in a pure Ag film of closely packed particles with a narrow size distribution on the membrane, and the properties were comparable to those of an Ag film on wet Sn-Ag-activated membranes.
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Affiliation(s)
- Jeong Hoon Byeon
- LCD Division, Samsung Electronics Co., Ltd., Yongin 446-711, Republic of Korea
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Perkas N, Amirian G, Dubinsky S, Gazit S, Gedanken A. Ultrasound-assisted coating of nylon 6,6 with silver nanoparticles and its antibacterial activity. J Appl Polym Sci 2007. [DOI: 10.1002/app.24728] [Citation(s) in RCA: 97] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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