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Ahmed Khan B, Ahmad M, Bolan N, Farooqi A, Iqbal S, Mickan B, Solaiman ZM, Siddique KHM. A mechanistic approach to arsenic adsorption and immobilization in aqueous solution, groundwater, and contaminated paddy soil using pine-cone magnetic biochar. ENVIRONMENTAL RESEARCH 2024; 245:117922. [PMID: 38151150 DOI: 10.1016/j.envres.2023.117922] [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: 04/14/2023] [Revised: 09/19/2023] [Accepted: 12/09/2023] [Indexed: 12/29/2023]
Abstract
Arsenic (As) poisoning in groundwater and rice paddy soil has increased globally, impacting human health and food security. There is an urgent need to deal with As-contaminated groundwater and soil. Biochar can be a useful remedy for toxic contaminants. This study explains the synthesis of pinecone-magnetic biochar (PC-MBC) by engineering the pinecone-pristine biochar with iron salts (FeCl3.6H2O and FeSO4.7H2O) to investigate its effects on As(V) adsorption and immobilization in water and soil, respectively. The results indicated that PC-MBC can remediate As(V)-contaminated water, with an adsorption capacity of 12.14 mg g-1 in water. Isotherm and kinetic modeling showed that the adsorption mechanism involved multilayer, monolayer, and diffusional processes, with chemisorption operating as the primary interface between As(V) and biochar. Post-adsorption analysis of PC-MBC, using FTIR and XRD, further revealed chemical fixing and outer-sphere complexation between As(V) and Fe, O, NH, and OH as the main reasons for As(V) adsorption onto PC-MBC. Recycling of PC-MBC also had excellent adsorption even after several regeneration cycles. Similarly, PC-MBC successfully immobilized As in paddy soil. Single and sequential extraction results showed the transformation of mobile forms of As to a more stable form, confirmed by non-destructive analysis using SEM, EDX, and elemental dot mapping. Thus, Fe-modified pine-cone biochar could be a suitable and cheap adsorbent for As-contaminated water and soil.
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Affiliation(s)
- Basit Ahmed Khan
- Department of Environmental Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan; The UWA Institute of Agriculture and UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA, 6001, Australia
| | - Mahtab Ahmad
- Department of Environmental Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan.
| | - Nanthi Bolan
- The UWA Institute of Agriculture and UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA, 6001, Australia
| | - Abida Farooqi
- Department of Environmental Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan
| | - Sajid Iqbal
- Department of Nuclear & Quantum Engineering, Korea Advance Institute of Science and Technology (KAIST), 291-Daehak-ro, Yuseong-gu, Daejeon, 34141, South Korea
| | - Bede Mickan
- The UWA Institute of Agriculture and UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA, 6001, Australia
| | - Zakaria M Solaiman
- The UWA Institute of Agriculture and UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA, 6001, Australia
| | - Kadambot H M Siddique
- The UWA Institute of Agriculture and UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA, 6001, Australia
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He Q, Bai Y, Lu Y, Cui B, Huang Z, Yang Q, Jiang D, Shao D. Isolation and characterization of cellulose nanocrystals from Chinese medicine residues. BIOMASS CONVERSION AND BIOREFINERY 2022:1-10. [PMID: 36259074 PMCID: PMC9562074 DOI: 10.1007/s13399-022-03380-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 09/19/2022] [Accepted: 10/09/2022] [Indexed: 06/16/2023]
Abstract
Nanocellulose has become a vital material with excellent and crucial properties in the field of nanotechnology and advanced materials science. Plant-based traditional Chinese medicines are mostly plant rhizomes, which contain a large amount of cellulose, hemicellulose, and lignin. In this study, carboxylated cellulose nanocrystals (CNCs) were prepared from traditional Chinese medicine residues (CMR) by sequential periodate-chlorite oxidation without mechanical treatment. The obtained nanocelluloses were analyzed by transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), and X-ray diffractometry (XRD); the carboxyl content and specific surface area were also measured, simultaneously. XRD results revealed that the crystallinity index decreased after sequential oxidation; however, the cellulose I structure was maintained. From the morphology analysis, the average length and width of CNCs were 139.3 and 10 nm, respectively. From the FTIR analysis, with the particle size decreasing, hydrogen bonds were broken and recombined. TGA results showed that the thermal property was decreased with a reduction of nanocellulose particle size and crystallinity index. This study is the first to refine utilization of traditional Chinese medicine residues as a potential source of cellulose, that is, to prepare nanocellulose efficiently with high carboxyl content which finds its application in nanomaterials.
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Affiliation(s)
- Qiang He
- College of Mechanical Engineering, Jiamusi University, Jiamusi, 154007 Heilongjiang China
| | - Yu Bai
- College of Engineering, Northeast Agricultural University, Harbin, 150030 Heilongjiang China
| | - Yuxi Lu
- Affiliated Hospital of Changchun University of Chinese Medicine, Changchun, 130021 Jilin China
| | - Bo Cui
- College of Mechanical Engineering, Jiamusi University, Jiamusi, 154007 Heilongjiang China
| | - Ziqiang Huang
- College of Mechanical Engineering, Jiamusi University, Jiamusi, 154007 Heilongjiang China
| | - Qince Yang
- College of Mechanical Engineering, Jiamusi University, Jiamusi, 154007 Heilongjiang China
| | - Donghua Jiang
- College of Mechanical Engineering, Jiamusi University, Jiamusi, 154007 Heilongjiang China
| | - Dongwei Shao
- College of Mechanical Engineering, Jiamusi University, Jiamusi, 154007 Heilongjiang China
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Xiao M, Li R, Yin J, Yang J, Hu X, Xiao H, Wang W, Yang T. Enhanced photocatalytic oxidation of As(Ⅲ) by TiO2 modified with Fe3O4 through Ti-O-Fe interface bonds. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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