1
|
Zhang B, Zheng H, Yang K, Li C, Wu T, Sui Q, Feng W. Bottom-up synthesis of a sulfhydryl-modified heteroporous covalent organic framework for ultrafast removal of trace Hg(Ⅱ) from water. CHEMOSPHERE 2024; 360:142410. [PMID: 38795912 DOI: 10.1016/j.chemosphere.2024.142410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2024] [Revised: 05/19/2024] [Accepted: 05/21/2024] [Indexed: 05/28/2024]
Abstract
The development of functionalized covalent organic frameworks (COFs) is crucial in expanding their potential for removing toxic heavy metals from drinking water. Here, a new sulfhydryl-modified heteroporous COF (COFDBD-BTA) was prepared using a "bottom-up" approach in which a direct amine-aldehyde dehydration condensation between 2,5-diamino-1,4-benzenedithiol dihydrochloride (DBD) and [1,1'-biphenyl]-3,3',5,5'-tetracarbaldehyde (BTA) was occurred. The COFDBD-BTA featured a hexagonal kagome (kgm) structure and a sheet-like morphology. Notably, COFDBD-BTA contained densely S atoms that provided high-density Hg(II) adsorption sites for efficient and selective trace Hg(II) removal. COFDBD-BTA exhibited excellent performance in rapidly removing trace Hg(II) from 30 μg L-1 to 0.71 μg L-1 within 10 s, below the World Health Organization's allowable limit of 1 μg L-1. Additionally, COFDBD-BTA exhibited a high Hg (Ⅱ) removal level from water, achieving adsorption capacity of 687.38 mg g-1. Furthermore, the adsorbent exhibited a wide range of applicability for low concentration (6-500 μg L-1) Hg (Ⅱ), a simple and feasible regeneration method, and strong Hg(II) removal ability in real tap water systems. The excellent adsorption efficiency, outstanding recyclability, and one-step room temperature synthesis make S-rich COFDBD-BTA a promising candidate for eliminating Hg (Ⅱ) from drinking water.
Collapse
Affiliation(s)
- Baichao Zhang
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
| | - Hong Zheng
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China.
| | - Kunmin Yang
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
| | - Chenyang Li
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
| | - Tong Wu
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
| | - Qingqing Sui
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
| | - Wuwei Feng
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
| |
Collapse
|
2
|
Kung HC, Wu CH, Huang BW, Chang-Chien GP, Mutuku JK, Lin WC. Mercury abatement in the environment: Insights from industrial emissions and fates in the environment. Heliyon 2024; 10:e28253. [PMID: 38571637 PMCID: PMC10987932 DOI: 10.1016/j.heliyon.2024.e28253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Revised: 03/14/2024] [Accepted: 03/14/2024] [Indexed: 04/05/2024] Open
Abstract
Mercury's neurotoxic effects have prompted the development of advanced control and remediation methods to meet stringent measures for industries with high-mercury feedstocks. Industries with significant Hg emissions, including artisanal and small-scale gold mining (ASGM)-789.2 Mg year-1, coal combustion-564.1 Mg year-1, waste combustion-316.1 Mg year-1, cement production-224.5 Mg year-1, and non-ferrous metals smelting-204.1 Mg year-1, use oxidants and adsorbents capture Hg from waste streams. Oxidizing agents such as O3, Cl2, HCl, CaBr2, CaCl2, and NH4Cl oxidize Hg0 to Hg2+ for easier adsorption. To functionalize adsorbents, carbonaceous ones use S, SO2, and Na2S, metal-based adsorbents use dimercaprol, and polymer-based adsorbents are grafted with acrylonitrile and hydroxylamine hydrochloride. Adsorption capacities span 0.2-85.6 mg g-1 for carbonaceous, 0.5-14.8 mg g-1 for metal-based, and 168.1-1216 mg g-1 for polymer-based adsorbents. Assessing Hg contamination in soils and sediments uses bioindicators and stable isotopes. Remediation approaches include heat treatment, chemical stabilization and immobilization, and phytoremediation techniques when contamination exceeds thresholds. Achieving a substantially Hg-free ecosystem remains a formidable challenge, chiefly due to the ASGM industry, policy gaps, and Hg persistence. Nevertheless, improvements in adsorbent technologies hold potential.
Collapse
Affiliation(s)
- Hsin-Chieh Kung
- Institute of Environmental Toxin and Emerging-Contaminant Research, Cheng Shiu University, Kaohsiung, 833301, Taiwan
| | - Chien-Hsing Wu
- Division of Nephrology, Department of Internal Medicine, Kaohsiung Chang-Gung Memorial Hospital, Kaohsiung, 83301, Taiwan
- Center for General Education, Cheng Shiu University, Kaohsiung 833301, Taiwan
| | - Bo-Wun Huang
- Department of Mechanical and Institute of Mechatronic Engineering, Cheng Shiu University, Kaohsiung City, 833301, Taiwan
| | - Guo-Ping Chang-Chien
- Institute of Environmental Toxin and Emerging-Contaminant Research, Cheng Shiu University, Kaohsiung, 833301, Taiwan
- Super micro mass research and technology center, Cheng Shiu University, Kaohsiung, 833301, Taiwan
- Center for Environmental Toxin and Emerging-Contaminant Research, Cheng Shiu University, Kaohsiung, 833301, Taiwan
| | - Justus Kavita Mutuku
- Institute of Environmental Toxin and Emerging-Contaminant Research, Cheng Shiu University, Kaohsiung, 833301, Taiwan
- Super micro mass research and technology center, Cheng Shiu University, Kaohsiung, 833301, Taiwan
- Center for Environmental Toxin and Emerging-Contaminant Research, Cheng Shiu University, Kaohsiung, 833301, Taiwan
| | - Wan-Ching Lin
- Department of Neuroradiology, E-Da Hospital, I-Shou University, Kaohsiung, 84001, Taiwan
- Department of Neurosurgery, E-Da Hospital/I-Shou University, Kaohsiung, 84001, Taiwan
| |
Collapse
|
3
|
Diacon A, Albota F, Mocanu A, Brincoveanu O, Podaru AI, Rotariu T, Ahmad AA, Rusen E, Toader G. Dual-Responsive Hydrogels for Mercury Ion Detection and Removal from Wastewater. Gels 2024; 10:113. [PMID: 38391443 PMCID: PMC10887514 DOI: 10.3390/gels10020113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Revised: 01/12/2024] [Accepted: 01/26/2024] [Indexed: 02/24/2024] Open
Abstract
This study describes the development of a fast and cost-effective method for the detection and removal of Hg2+ ions from aqueous media, consisting of hydrogels incorporating chelating agents and a rhodamine derivative (to afford a qualitative evaluation of the heavy metal entrapment inside the 3D polymeric matrix). These hydrogels, designed for the simultaneous detection and entrapment of mercury, were obtained through the photopolymerization of 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPSA) and N-vinyl-2-pyrrolidone (NVP), utilizing N,N'-methylenebisacrylamide (MBA) as crosslinker, in the presence of polyvinyl alcohol (PVA), a rhodamine B derivative, and one of the following chelating agents: phytic acid, 1,3-diamino-2-hydroxypropane-tetraacetic acid, triethylenetetramine-hexaacetic acid, or ethylenediaminetetraacetic acid disodium salt. The rhodamine derivative had a dual purpose in this study: firstly, it was incorporated into the hydrogel to allow the qualitative evaluation of mercury entrapment through its fluorogenic switch-off abilities when sensing Hg2+ ions; secondly, it was used to quantitatively evaluate the level of residual mercury from the decontaminated aqueous solutions, via the UV-Vis technique. The ICP-MS analysis of the hydrogels also confirmed the successful entrapment of mercury inside the hydrogels and a good correlation with the UV-Vis method.
Collapse
Affiliation(s)
- Aurel Diacon
- Military Technical Academy "Ferdinand I", 39-49 G. Cosbuc Blvd., 050141 Bucharest, Romania
- Faculty of Chemical Engineering and Biotechnologies, National University of Science and Technology Politechnica Bucharest, 1-7 Gh. Polizu Street, 011061 Bucharest, Romania
| | - Florin Albota
- Horia Hulubei National Institute of Physics and Nuclear Engineering, 30 Reactorului Street, 077125 Magurele, Romania
| | - Alexandra Mocanu
- Faculty of Chemical Engineering and Biotechnologies, National University of Science and Technology Politechnica Bucharest, 1-7 Gh. Polizu Street, 011061 Bucharest, Romania
- National Institute for Research and Development in Microtechnologies-IMT Bucharest, 126A Erou Iancu Nicolae Street, 077190 Bucharest, Romania
| | - Oana Brincoveanu
- National Institute for Research and Development in Microtechnologies-IMT Bucharest, 126A Erou Iancu Nicolae Street, 077190 Bucharest, Romania
- Research Institute, University of Bucharest, 90 Sos. Panduri, 050663 Bucharest, Romania
| | - Alice Ionela Podaru
- Military Technical Academy "Ferdinand I", 39-49 G. Cosbuc Blvd., 050141 Bucharest, Romania
| | - Traian Rotariu
- Military Technical Academy "Ferdinand I", 39-49 G. Cosbuc Blvd., 050141 Bucharest, Romania
| | - Ahmad A Ahmad
- Department of Physical Sciences, Jordan University of Science & Technology, P.O. Box 3030, Irbid 22110, Jordan
| | - Edina Rusen
- Faculty of Chemical Engineering and Biotechnologies, National University of Science and Technology Politechnica Bucharest, 1-7 Gh. Polizu Street, 011061 Bucharest, Romania
| | - Gabriela Toader
- Military Technical Academy "Ferdinand I", 39-49 G. Cosbuc Blvd., 050141 Bucharest, Romania
| |
Collapse
|
4
|
Wang L, Liu J, Wang J, Zhang D, Huang J. Thiophene-based porphyrin polymers for Mercury (II) efficient removal in aqueous solution. J Colloid Interface Sci 2024; 653:405-412. [PMID: 37722169 DOI: 10.1016/j.jcis.2023.09.089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 08/26/2023] [Accepted: 09/13/2023] [Indexed: 09/20/2023]
Abstract
Development of novel sulf-functionalized porous organic polymers (POPs) for Mercury (II) (Hg2+) removal is of great significant, but the adsorbents always suffered by the low adsorption capacity, stability, and efficiency for the reason that the common construction of functionalized POPs from the functionalized monomers or post-functionalization of the POPs always sacrifice the porosity. In this paper, porphyrin-based POPs with different heteroatoms were constructed through the aldehyde monomer (benzene, 2,5-thiophenedicarboxaldehyde and thieno[3,2-b]thiophene-2,5-dicarboxaldehyde) and pyrrole according to the Adler-Longo method. In this way, nitrogen (N) in pyrrole and sulfur (S) in thiophene structures were embed into the backbone structure of the polymers. The functional structures not only act as the linking building block into the stable cross-linking structure, but also offer abundant uncovered functional sites for Hg2+ adsorption, resulting the porphyrin-based POPs high Hg2+ capacity (1049 mg/g), removal efficiency (more than 99.9%), good reusability and selectivity for its highest heteroatoms contents. The adsorption mechanism confirmed the cooperative coordination of N in porphyrin and S in thiophene with Hg2+. This work confirmed the functional groups play more important role in heavy metal adsorption, and the embedded functional sites into backbone also promotes the stability and the adsorption performance.
Collapse
Affiliation(s)
- Lizhi Wang
- College of Science, Central South University of Forestry and Technology, Changsha 410004, China.
| | - Junlong Liu
- College of Science, Central South University of Forestry and Technology, Changsha 410004, China
| | - Jiajia Wang
- College of Chemistry and Chemical Engineering, Hunan Provincial Key Laboratory of Micro and Nano Material Interface, Central South University, Changsha 410083, China
| | - Du Zhang
- College of Chemistry and Chemical Engineering, Hunan Provincial Key Laboratory of Micro and Nano Material Interface, Central South University, Changsha 410083, China
| | - Jianhan Huang
- College of Chemistry and Chemical Engineering, Hunan Provincial Key Laboratory of Micro and Nano Material Interface, Central South University, Changsha 410083, China.
| |
Collapse
|
5
|
Liu Y, Li S, Chen Y, Hu T, Pudukudy M, Shi L, Shan S, Zhi Y. Modified melamine-based porous organic polymers with imidazolium ionic liquids as efficient heterogeneous catalysts for CO 2 cycloaddition. J Colloid Interface Sci 2023; 652:737-748. [PMID: 37500314 DOI: 10.1016/j.jcis.2023.07.127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 06/27/2023] [Accepted: 07/19/2023] [Indexed: 07/29/2023]
Abstract
The chemical conversion of carbon dioxide (CO2) into highly value-added products not only alleviates the environmental issues caused by global warming but also makes an impact on economic benefits in the world. The synthesis of cyclic carbonates by the cycloaddition of CO2 with epoxides is one of the most attractive methods for CO2 conversion. However, the development of green and highly efficient heterogeneous catalysts is considered to be a great challenge in catalysis. In this work, alkenyl-modified melamine-based porous organic polymer (MPOP-4A) was firstly synthesized by a one-pot polycondensation method, and it was again modified with imidazolium-based ionic liquids to obtain final modified catalyst (MPOP-4A-IL). Various analytical techniques were used to confirm structure and chemical composition of the prepared materials. The MPOP-4A-IL catalyst synthesized by the post-modification strategy with imidazolium-based ionic liquids exhibited enhanced catalytic activity for CO2 cycloaddition reaction. The enhanced catalytic performance could be attributed to the presence of abundant active sites in their structure such as hydrogen bond donors (HBD), nitrogen (N) sites, and nucleophilic groups for an effective chemical reaction. The MPOP-4A-IL catalyst was found to be metal-free, easy to recycle and reuse, and has good versatility for a series of different epoxides. The interaction of MPOP-4A-IL catalyst with epoxide and CO2 was further verified by density functional theory (DFT) calculations, and the possible mechanism of the CO2 cycloaddition reaction was proposed.
Collapse
Affiliation(s)
- Yi Liu
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, PR China
| | - Shuangjiang Li
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, PR China
| | - Ying Chen
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, PR China; Sichuan Vocational College of Chemical Technology, Luzhou, Sichuan 646300, PR China
| | - Tianding Hu
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, PR China
| | - Manoj Pudukudy
- Department of Chemistry, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Thandalam, Chennai 602105, Tamil Nadu, India
| | - Lan Shi
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, PR China
| | - Shaoyun Shan
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, PR China.
| | - Yunfei Zhi
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, PR China.
| |
Collapse
|
6
|
Sáenz-García DR, Figuerola A, Turnes Palomino G, Leal LO, Palomino Cabello C. Thiol-Functionalized MIL-100(Fe)/Device for the Removal of Heavy Metals in Water. Inorg Chem 2023; 62:19404-19411. [PMID: 37978941 DOI: 10.1021/acs.inorgchem.3c01544] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
The preparation of a functional device based on a functionalized MIL-100(Fe) metal-organic framework for the solid-phase extraction of heavy metals is reported. By a simple and easy straightforward grafting procedure, a thiol-functionalized MIL-100(Fe) material (MIL-100(Fe)-SH) with a S/Fe ratio of 0.80 and a surface area of 840 m2 g-1 was obtained. MIL-100(Fe)-SH exhibited a higher Hg(II) extraction (96 ± 5%) than that of MIL-100(Fe) (78 ± 4%) due to the interaction between thiol groups and Hg(II) ions. For practical applications, the obtained MIL-100(Fe)-SH was integrated by a simple method to a 3D printed support based on a matrix of interconnected cubes using poly(vinylidene fluoride) as binder, obtaining a functional device that simultaneously acts as stirrer and sorbent. The developed device showed high efficiency for the removal of Hg(II), good reusability, and excellent performance for the simultaneous preconcentration and further detection and quantification of Hg(II), Pb(II), and As(V) in tap, well, and lake water samples.
Collapse
Affiliation(s)
- D R Sáenz-García
- Environment and Energy Department, Advanced Materials Research Center, (CIMAV) S.C., Miguel de Cervantes 120, Chihuahua, Chih. 31136, Mexico
- Department of Chemistry, University of the Balearic Islands, Cra. Valldemossa Km 7.5, Palma 07122, Spain
| | - Andreu Figuerola
- Department of Chemistry, University of the Balearic Islands, Cra. Valldemossa Km 7.5, Palma 07122, Spain
| | - Gemma Turnes Palomino
- Department of Chemistry, University of the Balearic Islands, Cra. Valldemossa Km 7.5, Palma 07122, Spain
| | - Luz O Leal
- Environment and Energy Department, Advanced Materials Research Center, (CIMAV) S.C., Miguel de Cervantes 120, Chihuahua, Chih. 31136, Mexico
| | - Carlos Palomino Cabello
- Department of Chemistry, University of the Balearic Islands, Cra. Valldemossa Km 7.5, Palma 07122, Spain
| |
Collapse
|
7
|
Wu K, Wang B, Dou R, Zhang Y, Xue Z, Liu Y, Niu Y. Synthesis of functional poly(amidoamine) dendrimer decorated apple residue cellulose for efficient removal of aqueous Hg(II). Int J Biol Macromol 2023; 231:123327. [PMID: 36681224 DOI: 10.1016/j.ijbiomac.2023.123327] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 01/07/2023] [Accepted: 01/15/2023] [Indexed: 01/20/2023]
Abstract
Water pollution caused by Hg(II) exerts hazardous effect to the environment and public health. The design and fabrication of eco-friendly bioadsorbents for efficient removal of Hg(II) from aqueous solution is a promising strategy. Herein, a series of bioadsorbents were synthesized by the decoration of apple residue cellulose with different generation (G) Schiff base functionalized poly(amidoamine) (PAMAM) dendrimers (SA-G0/CE, SA-G1.0/CE and SA-G2.0/CE). The structures of SA-G0/CE, SA-G1.0/CE and SA-G2.0/CE were characterized and their adsorption performances were determined comprehensively by considering various factors. The maximum adsorption capacity of SA-G0/CE, SA-G1.0/CE and SA-G2.0/CE for Hg(II) are 1.18, 1.73 and 1.88 mmol·g-1, respectively. The as-prepared bioadsorbents exhibit competitive adsorption capacity as compared with other reported adsorbents. Moreover, they exhibit remarkable adsorption selectivity toward Hg(II) with the coexistence of Ni(II), Cd(II), Mn(II), or Pb(II). The bioadsorbents display satisfactory adsorption performance in real water sample and can be reused with good regeneration property. Adsorption mechanism reveals that the functional groups of OH, -CONH-, CN and NC take part in the adsorption for Hg(II). The work not only opens a pathway to realize the reuse of apple residue, but also provides a promising strategy to construct efficient bioadsorbents for the decontamination of Hg(II) from aqueous solution.
Collapse
Affiliation(s)
- Kaiyan Wu
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, PR China
| | - Bingxiang Wang
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, PR China
| | - Ruyue Dou
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, PR China
| | - Yiqun Zhang
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, PR China
| | - Zhongxin Xue
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, PR China
| | - Yongfeng Liu
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, PR China
| | - Yuzhong Niu
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, PR China.
| |
Collapse
|
8
|
Yang L, Song Y, Li J, Xu W, Peng C, Wang L. S,N-rich luminous covalent organic frameworks for Hg 2+ detection and removal. CHEMOSPHERE 2023; 311:136919. [PMID: 36272626 DOI: 10.1016/j.chemosphere.2022.136919] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 10/12/2022] [Accepted: 10/16/2022] [Indexed: 06/16/2023]
Abstract
The challenge for simultaneous detection and removal of Hg2+ is the design of bifunctional materials bearing abundant accessible chelating sites with high affinity. Covalent-organic frameworks (COFs) are attracting more and more attention as potential bifunctional materials for Hg2+ detection due to their large specific surface area, ordered pores, and abundant chelating sites. Here, a new luminous S,N-rich COFBTT-AMPD based on hydrophilic block unit of 2,2'-azobis(2-methylpropionamidine) dihydrochloride (AMPD) was constructed, which improved the solubility and affinity for Hg2+ greatly. Another S-rich fused-ring unit of benzotrithiophene tricarbalaldehyde (BTT) enhanced the conjugation of COFBTT-AMPD, and the methyl-rich chains block unit of AMPD effectively suppressed the aggregation-caused quenching. Thus, the COFBTT-AMPD emitted strong fluorescence at 546 nm in liquid and solid as well as different solvent with a wide pH range, which was used for the visual detection and removal of Hg2+ (detection limit: 2.6 nM, linear range: 8.6 × 10-3-20 μM, monolayer adsorption capacity: 476.19 mg g-1) successfully. COFBTT-AMPD-based fabric and light-emitting diode coatings were further constructed to realize the visual detection of Hg2+ vapor. The results reveal the potential of S,N-rich luminous COFBTT-AMPD for Hg2+ detection and remediation in the environment.
Collapse
Affiliation(s)
- Li Yang
- National Engineering Research Center for Carbohydrate Synthesis/Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Jiangxi Normal University, 99 Ziyang Road, Nanchang, 330022, China
| | - Yonghai Song
- National Engineering Research Center for Carbohydrate Synthesis/Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Jiangxi Normal University, 99 Ziyang Road, Nanchang, 330022, China
| | - Junjie Li
- National Engineering Research Center for Carbohydrate Synthesis/Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Jiangxi Normal University, 99 Ziyang Road, Nanchang, 330022, China
| | - Wentao Xu
- National Engineering Research Center for Carbohydrate Synthesis/Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Jiangxi Normal University, 99 Ziyang Road, Nanchang, 330022, China
| | - Chengyu Peng
- National Engineering Research Center for Carbohydrate Synthesis/Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Jiangxi Normal University, 99 Ziyang Road, Nanchang, 330022, China
| | - Li Wang
- National Engineering Research Center for Carbohydrate Synthesis/Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Jiangxi Normal University, 99 Ziyang Road, Nanchang, 330022, China.
| |
Collapse
|
9
|
Han L, Li L, Gao R, Liu X, Kan C. Functional core/shell
PMMA
/P(
MMA‐
co
‐PDSECAE
)‐
SH
particles with thiol groups in the shell and their adsorption of heavy metal ions. J Appl Polym Sci 2022. [DOI: 10.1002/app.52859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Lu Han
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education Tsinghua University Beijing People's Republic of China
| | - Lingxiao Li
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education Tsinghua University Beijing People's Republic of China
| | - Rongsheng Gao
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education Tsinghua University Beijing People's Republic of China
| | - Xueyan Liu
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education Tsinghua University Beijing People's Republic of China
| | - Chengyou Kan
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education Tsinghua University Beijing People's Republic of China
| |
Collapse
|
10
|
Xu R, Tan H, Guo M, Zuo S, Sun X. Ultra-Fast Synthesis of Thiol-Functionalized Organosilica (OS-SH) for Adsorption of Hg(II) from Aqueous Solution. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2022. [DOI: 10.1134/s0036024422070263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
11
|
Synthesis of Cross-Linked Pyrazine-Based Polymers for Selective Removal of Mercury(II) Ions from Wastewater Solutions. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2022. [DOI: 10.1007/s13369-022-06833-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
|
12
|
Jin Z, Hu G, Zhao K. Mannose-anchored quaternized chitosan/thiolated carboxymethyl chitosan composite NPs as mucoadhesive carrier for drug delivery. Carbohydr Polym 2022; 283:119174. [DOI: 10.1016/j.carbpol.2022.119174] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 11/20/2021] [Accepted: 01/20/2022] [Indexed: 12/19/2022]
|
13
|
Ding X, Yu W, Sheng X, Shi H, You D, Peng M, Shao P, Yang L, Liu L, Luo X. Feasible fabrication of o-phenanthroline-based polymer adsorbent for selective capture of aqueous Ag(I). CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.04.083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
14
|
Pei P, Xu Y, Wang L, Liang X, Sun Y. Thiol-functionalized montmorillonite prepared by one-step mechanochemical grafting and its adsorption performance for mercury and methylmercury. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 806:150510. [PMID: 34844321 DOI: 10.1016/j.scitotenv.2021.150510] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 08/22/2021] [Accepted: 09/18/2021] [Indexed: 06/13/2023]
Abstract
The preparation of low-cost and highly efficient functional materials for the cleanup of mercury-contaminated water by adsorption in an environmentally friendly way is of great significance. In this study, thiol-functionalized montmorillonite (BSH-MMT) was prepared by a novel one-step mechanochemical grafting method and applied to aqueous Hg2+ and CH3Hg+ adsorption. Characterization results showed that thiol groups were successfully grafted by chemical bonding with Si-OH or broken SiO bonds. The maximum adsorption capacities of BSH-MMT for Hg2+ and CH3Hg+ were 104.79 mg g-1 and 39.27 mg g-1, which were approximately seven- and nine-fold that of pristine MMT, respectively. Adsorption kinetics and isotherm fitting indicated that Hg2+ adsorbs heterogeneously, while CH3Hg+ proceeds through monolayer adsorption, both with chemical adsorption as the rate-limiting step. BSH-MMT maintained high adsorption performance over a wide pH range and in the presence of humic acid because of the high affinity of thiol groups toward mercury. The primary adsorption mechanism of thiol-ligand complexation was confirmed by the results of X-ray photoelectron spectroscopy and X-ray absorption spectra, in which a complex structure of bis-coordinated S-Hg-S (2.30 Å distance) was observed. These results demonstrated that mechanochemical grafting is a promising one-step method to prepare thiol-functionalized montmorillonite for effective cleanup of Hg2+/CH3Hg+ contamination in water.
Collapse
Affiliation(s)
- Penggang Pei
- Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs (MARA), Agro-Environmental Protection Institute, Tianjin 300191, China; Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Agro-Environmental Protection Institute, MARA, Tianjin 300191, China
| | - Yingming Xu
- Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs (MARA), Agro-Environmental Protection Institute, Tianjin 300191, China; Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Agro-Environmental Protection Institute, MARA, Tianjin 300191, China
| | - Lin Wang
- Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs (MARA), Agro-Environmental Protection Institute, Tianjin 300191, China; Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Agro-Environmental Protection Institute, MARA, Tianjin 300191, China
| | - Xuefeng Liang
- Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs (MARA), Agro-Environmental Protection Institute, Tianjin 300191, China; Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Agro-Environmental Protection Institute, MARA, Tianjin 300191, China
| | - Yuebing Sun
- Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs (MARA), Agro-Environmental Protection Institute, Tianjin 300191, China; Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Agro-Environmental Protection Institute, MARA, Tianjin 300191, China.
| |
Collapse
|
15
|
Venkateswarlu S, Yoon M, Kim MJ. An environmentally benign synthesis of Fe 3O 4 nanoparticles to Fe 3O 4 nanoclusters: Rapid separation and removal of Hg(II) from an aqueous medium. CHEMOSPHERE 2022; 286:131673. [PMID: 34358889 DOI: 10.1016/j.chemosphere.2021.131673] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 07/15/2021] [Accepted: 07/23/2021] [Indexed: 06/13/2023]
Abstract
In the field of nanotechnology, nanoadsorbents have emerged as a powerful tool for the purification of contaminated aqueous environments. Among the variety of nanoadsorbents developed so far, magnetite (Fe3O4) nanoparticles have drawn particular interest because of their quick separation, low cost, flexibility, reproducibility, and environmentally benign nature. Herein, we describe a new strategy for the synthesis of Fe3O4 nanoclusters, which is based on the use of naturally available edible mushrooms (Pleurotus eryngii) and environmentally benign propylene glycol as a solvent medium. By tuning the temperature, we successfully convert Fe3O4 nanoparticles into Fe3O4 nanoclusters via hydrothermal treatment, as evidenced by transmission electron microscopy. The Fe3O4 nanoclusters are functionalized with an organic molecule linker (dihydrolipoic acid, DHLA) to remove hazardous Hg(II) ions selectively. Batch adsorption experiments demonstrate that Hg(II) ions are strongly adsorbed on the material surface, and X-ray photoelectron and Fourier transform infrared spectroscopy techniques reveal the Hg(II) removal mechanism. The DHLA@Fe3O4 nanoclusters show a high removal efficiency of 99.2 % with a maximum Hg(II) removal capacity of 140.84 mg g-1. A kinetic study shows that the adsorption equilibrium is rapidly reached within 60 min and follows a pseudo second-order kinetic model. The adsorption and separation system can be readily recycled using an external magnet when the separation occurs within 10 s. We have studied the effect of various factors on the adsorption process, including pH, concentration, dosage, and temperature. The newly synthesized superparamagnetic DHLA@Fe3O4 nanoclusters open a new path for further development of the medical, catalysis, and environmental fields.
Collapse
Affiliation(s)
- Sada Venkateswarlu
- Department of Chemistry, Gachon University, Seongnam, 1320, Republic of Korea
| | - Minyoung Yoon
- Department of Chemistry, Kyungpook National University, Daegu, 41566, Republic of Korea.
| | - Myung Jong Kim
- Department of Chemistry, Gachon University, Seongnam, 1320, Republic of Korea.
| |
Collapse
|
16
|
Sun Y, Gu Y, Li X, Singh RP. Synthesis of novel thiol-modified lysozyme coated magnetic nanoparticles for the high selective adsorption of Hg(II). REACT FUNCT POLYM 2022. [DOI: 10.1016/j.reactfunctpolym.2021.105129] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
|
17
|
Liu X, Li Y, He L, Feng Y, Tan H, Chen X, Yang W. Simultaneous detection of multiple neuroendocrine tumor markers in patient serum with an ultrasensitive and antifouling electrochemical immunosensor. Biosens Bioelectron 2021; 194:113603. [PMID: 34474281 DOI: 10.1016/j.bios.2021.113603] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 08/25/2021] [Accepted: 08/27/2021] [Indexed: 12/31/2022]
Abstract
Neuroendocrine tumors (NETs) are rare heterogeneous tumors that are often misdiagnosed and mistreated. Most NETs patients are diagnosed as advanced. Early on-time detection of NETs is significant for precision therapy. Here, an ultrasensitive and antifouling label-free electrochemical immunosensor was constructed for simultaneous analysis of NETs biomarkers chromogranin A (CgA) and chromogranin B (CgB). The metal ion functionalized porous magnesium silicate/gold nanoparticles/polyethylene glycol/chitosan (PMS-M2+/AuNPs/PEG/CS) composites were employed as the sensing platforms. By combining PEG and CS with good hydrophilicity, the sensing interface exhibited outstanding antifouling ability in complex biological systems. PMS with high surface area and the porous structure can efficiently load Cu2+ and Pb2+, which could directly generate independent electrochemical peak currents that reflected the concentrations of CgA and CgB. Under optimal conditions, this immunosensor can detect CgA and CgB with good linearity from 0.1 pg mL-1 to 100 ng mL-1 as low as 5.3 and 2.1 fg mL-1, respectively. Moreover, this immunosensor can accurately detect CgA and CgB levels in clinical serum, which were well consistent with the enzyme-linked immunosorbent assay (ELISA). This strategy provided a sensitive, simple and low-cost platform for clinical screening and point-of-care diagnosis of NETs.
Collapse
Affiliation(s)
- Xuejiao Liu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, PR China
| | - Yuanliang Li
- Medical School, Beijing University of Chinese Medicine, Beijing, 100029, PR China; Department of Integrative Oncology, China-Japan Friendship Hospital, Beijing, 100029, PR China
| | - Li He
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, PR China
| | - Yongjun Feng
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, PR China
| | - Huangying Tan
- Department of Integrative Oncology, China-Japan Friendship Hospital, Beijing, 100029, PR China
| | - Xu Chen
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, PR China.
| | - Wensheng Yang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, PR China
| |
Collapse
|
18
|
Vakili F, Rashidi A, Taghavi L, Mansouri N. Conversion of biomass to N, S co-doped porous graphene as an adsorbent for mercury vapor removal: optimization and DFT study. JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE & ENGINEERING 2021; 19:1569-1582. [PMID: 34900289 PMCID: PMC8617130 DOI: 10.1007/s40201-021-00712-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 07/12/2021] [Indexed: 06/14/2023]
Abstract
UNLABELLED This study is devoted to optimization synthesis conditions of the N, S co-doped porous graphene via a single step thermal chemical activation process from agricultural wastes such as cabbage waste. To this end, the response surface method (RSM) was considered, and the synthesis parameters were varied in specific ranges. By doing so, the optimum conditions in terms of the best performance in mercury removal was determined which was characterized by TEM, SEM, BET, XRD, XPS, and FTIR techniques. The chosen key process parameters were Activation agent to carbon precursor ratio (A: KOH/C), Reaction time (B: Time), Activation temperature (C: Temperature), and (Dopant to carbon precursor ratio (D: Dopant/C). Each parameter was investigated in 3 levels with lower and upper bounds being A: 2-6; B:30-90 min.; C: 600-800 ˚C; D:2-10. The optimum conditions of the process were determined to be as: A: 2; B: 30 min.; C: 600 ˚C and D: 2. The optimized sample was prepared in repeated runs with reproducible results with Hg vapor adsorption capacity of 2100 µg/g at 40 ˚C and 2266 µg/g at 90 ˚C. In addition to the experiments, DFT calculations were also carried out which elucidated the positive role of N and S co-doping in improving the mercury adsorption intensity. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s40201-021-00712-y.
Collapse
Affiliation(s)
- Forouzan Vakili
- Department of Environmental Science, Faculty of Natural Resources and Environment, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Alimorad Rashidi
- Nanotechnology Research Center, Research Institute of Petroleum Industry (RIPI), West Entrance Blvd., Olympic Village, P.O. Box 14857-33111, Tehran, Iran
| | - Lobat Taghavi
- Department of Environmental Science, Faculty of Natural Resources and Environment, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Nabiollah Mansouri
- Department of Environmental Engineering, Faculty of Natural Resources and Environment, Science and Research Branch, Islamic Azad University, Tehran, Iran
| |
Collapse
|
19
|
Zhu Y, Lin H, Feng Q, Zhao B, Lan W, Li T, Xue B, Li M, Zhang Z. Sulfhydryl-modified SiO2 cryogel: A pH-insensitive and selective adsorbent for efficient removal of mercury in waters. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126382] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
|
20
|
Pei X, Gan L, Tong Z, Gao H, Meng S, Zhang W, Wang P, Chen Y. Robust cellulose-based composite adsorption membrane for heavy metal removal. JOURNAL OF HAZARDOUS MATERIALS 2021; 406:124746. [PMID: 33341475 DOI: 10.1016/j.jhazmat.2020.124746] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Revised: 11/20/2020] [Accepted: 11/30/2020] [Indexed: 06/12/2023]
Abstract
Adsorptive membranes offer an effective mode to remove heavy metal ions from contaminated water, due to the synergies made possible by low-cost, high-affinity adsorbents and highly scalable filtration in one system. However, the development of adsorptive membranes is hampered by their instability in the aqueous phase and low binding affinity with a broad spectrum of heavy metals in a reasonable flux. Herein, a regenerated cellulose support membrane is strongly grafted with stable and covalent-bonded polyelectrolyte active layers synthesized by a reactive layer-by-layer (LBL) assembly method. The LBL assembled layers have been successfully tested by scanning electron microscopy, Fourier-transform infrared spectroscopy and X-ray photo-electron spectroscopy. The covalent bonding provides the membrane with long-term stability and a tunable water flux compared to a membrane assembled by electrostatic bonding. The maximum adsorption capacity of the membrane active layers can reach up to 194 mg/g, showing more efficient adsorption at lower heavy metal concentration and higher pH value of feed solution. The membrane can remove multiple ions, such as Cu, Pb, and Cd, by adsorption and is easy to be regenerated and recovered. The strong covalent bonding can extend the membrane lifetime in water purification to remove multiple heavy metals at high efficiency.
Collapse
Affiliation(s)
- Xiaopeng Pei
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, United States; Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China
| | - Lan Gan
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, United States
| | - Zhaohui Tong
- Agricultural & Biological Engineering, University of Florida, Gainesville, FL 32611, United States.
| | - Haiping Gao
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, United States
| | - Shanyu Meng
- Agricultural & Biological Engineering, University of Florida, Gainesville, FL 32611, United States
| | - Wenlong Zhang
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, United States
| | - Pixin Wang
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China
| | - Yongsheng Chen
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, United States.
| |
Collapse
|
21
|
New network polymer functionalized magnetic-mesoporous nanoparticle for rapid adsorption of Hg(II) and sequential efficient reutilization as a catalyst. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.118112] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
22
|
Bai Y, Hong J. Preparation of a Novel Millet Straw Biochar-Bentonite Composite and Its Adsorption Property of Hg 2+ in Aqueous Solution. MATERIALS 2021; 14:ma14051117. [PMID: 33673689 PMCID: PMC7957562 DOI: 10.3390/ma14051117] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 02/20/2021] [Accepted: 02/22/2021] [Indexed: 12/17/2022]
Abstract
The remediation of mercury (Hg) contaminated soil and water requires the continuous development of efficient pollutant removal technologies. To solve this problem, a biochar–bentonite composite (CB) was prepared from local millet straw and bentonite using the solution intercalation-composite heating method, and its physical and chemical properties and micromorphology were then studied. The prepared CB and MB (modified biochar) had a maximum adsorption capacity for Hg2+ of 11.722 and 9.152 mg·g−1, respectively, far exceeding the corresponding adsorption value of biochar and bentonite (6.541 and 2.013 mg·g−1, respectively).The adsorption of Hg2+ on the CB was characterized using a kinetic model and an isothermal adsorption line, which revealed that the pseudo-second-order kinetic model and Langmuir isothermal model well represented the adsorption of Hg2+ on the CB, indicating that the adsorption was mainly chemical adsorption of the monolayer. Thermodynamic experiments confirmed that the adsorption process of Hg2+ by the CB was spontaneous and endothermic. Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and a thermogravimetric analysis (TGA) showed that after Hg2+ was adsorbed by CB, functional groups, such as the –OH group (or C=O, COO–, C=C) on the CB, induced complexation between Hg and –O–, and part of Hg (ii) was reduced Hg (i), resulting in the formation of single or double tooth complexes of Hg–O– (or Hg–O–Hg). Therefore, the prepared composite (CB) showed potential application as an excellent adsorbent for removing heavy metal Hg2+ from polluted water compared with using any one material alone.
Collapse
|
23
|
El-Zahhar AA, Idris AM. Mercury(II) decontamination using a newly synthesized poly(acrylonitrile-acrylic acid)/ammonium molybdophosphate composite exchanger. TOXIN REV 2020. [DOI: 10.1080/15569543.2020.1824191] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Adel A. El-Zahhar
- Faculty of Science, Department of Chemistry, King Khalid University, Abha, Saudi Arabia
- Nuclear Chemistry Department, Hot Laboratory Center, Atomic Energy Authority, Cairo, Egypt
| | - Abubakr M. Idris
- Faculty of Science, Department of Chemistry, King Khalid University, Abha, Saudi Arabia
- Research Center for Advanced Materials Science (RCAMS), King Khalid University, Abha, Saudi Arabia
| |
Collapse
|
24
|
Gong L, Kong Y, Wu H, Ge Y, Li Z. Sodium Alginate Microspheres Interspersed with Modified Lignin and Bentonite (SA/ML-BT) as a Green and Highly Effective Adsorbent for Batch and Fixed-Bed Column Adsorption of Hg (II). J Inorg Organomet Polym Mater 2020. [DOI: 10.1007/s10904-020-01757-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|