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Huang J, Jiao Y, Weatherley AJ, Duan AX, Wang S, Li C, Ma Z, Liu W, Han B. Catalytic modification of corn straw facilitates the remediation of Cd contaminated water and soil. J Hazard Mater 2023; 445:130582. [PMID: 37055987 DOI: 10.1016/j.jhazmat.2022.130582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2022] [Revised: 11/28/2022] [Accepted: 12/07/2022] [Indexed: 06/19/2023]
Abstract
Turning postharvest residue into high-value-added products is crucial for agricultural waste management and environmental remediation. In this proof-of-concept study, nanosized Pt/TiO2 was used as a model catalyst to modify corn straw (CS) materials through a simple low-temperature oxidation process. This method was demonstrated to be self-sustainable, waste-free, and with high yields. At an optimal temperature of 220 °C, O2 treatment with 1 wt% Pt/TiO2 greatly changed ultra-micropore and mesopore structures, dissolved organic carbon, aromatic contents and surface oxygen (O)-containing functional groups in CS products. This treatment resulted in an approximately 5-fold increase of cadmium (Cd) adsorption from aqueous solution and immobilization rate of 43.1% at 7d for bioavailable Cd in soil. Spectroscopic and linear regression analysis demonstrated that both acidic and basic functional groups in CS contributed to Cd adsorption, suggesting chemical adsorption. According to the d-band theory, the unexpected role of catalysts in CS modification could be associated with dissociative adsorption of molecular O2 on the Pt surface. These results provide insights for the development of economic and sustainable technologies to reutilize agricultural waste biomass for water and soil remediation.
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Affiliation(s)
- Jie Huang
- College of Chemistry and Environmental Science, Hebei University, Baoding 071002, PR China
| | - Yunhong Jiao
- College of Chemistry and Environmental Science, Hebei University, Baoding 071002, PR China
| | - Anthony J Weatherley
- School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Alex Xiaofei Duan
- Melbourne Trace Analysis of Chemical, Earth and Environmental Sciences (TrACEES) Platform and School of Chemistry, Faculty of Science, The University of Melbourne, 3010, Australia
| | - Shutao Wang
- Land and Resource College, Hebei Agriculture University, Baoding 071002, PR China
| | - Chaoyu Li
- School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, VIC 3010, Australia.
| | - Zhiling Ma
- College of Chemistry and Environmental Science, Hebei University, Baoding 071002, PR China
| | - Wei Liu
- College of Chemistry and Environmental Science, Hebei University, Baoding 071002, PR China
| | - Bing Han
- College of Chemistry and Environmental Science, Hebei University, Baoding 071002, PR China; School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, VIC 3010, Australia.
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Kassa Dada T, Vuppaladadiyam A, Xiaofei Duan A, Kumar R, Antunes E. Probing the effect of Cu-SrO loading on catalyst supports (ZSM-5, Y-zeolite, activated carbon, Al 2O 3, and ZrO2) for aromatics production during catalytic co-pyrolysis of biomass and waste cooking oil. Bioresour Technol 2022; 360:127515. [PMID: 35764281 DOI: 10.1016/j.biortech.2022.127515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 06/21/2022] [Accepted: 06/22/2022] [Indexed: 06/15/2023]
Abstract
In this work, Cu-SrO bimetallic catalyst was synthesised and examined for catalytic co-pyrolysis of ironbark (IB) and waste cooking oil (WCO) using Py-GC/MS. The effect of catalyst supports (ZSM-5, Y-zeolite, activated carbon, Al2O3, and ZrO2) on aromatic hydrocarbons yield was studied. The effect of catalyst support on the selectivity of gasoline (C8-C14), diesel (C15-C17), and heavy oil (>C20) components of bio-oil were studied. Non-catalytic co-pyrolysis of IB and WCO produced a heavy oil component of 58.7% (>C20). SrO initiated a ketonization reaction that converted carboxylic acids into new C-C bonds. The addition of Cu effectively promoted secondary cracking and aromatization reactions enhancing the hydrocarbon yield. Cu-SrO/ZSM-5 and Cu-SrO/Y-zeolite produced low acid content of 4.43% and 12.5%, respectively. Overall, the bimetallic catalyst Cu-SrO/ZSM-5 significantly increased the amount of C8-C14 compounds to 87.28% and reduced compounds over C20 to 1.19%.
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Affiliation(s)
- Tewodros Kassa Dada
- College of Science and Engineering, James Cook University, Townsville, Australia
| | - Arun Vuppaladadiyam
- College of Science and Engineering, James Cook University, Townsville, Australia
| | - Alex Xiaofei Duan
- Melbourne Trace Analysis for Chemical, Earth and Environmental Sciences (TrACEES) Platform and School of Chemistry, The University of Melbourne, Melbourne, VIC 3010, Australia
| | - Ravinder Kumar
- College of Science and Engineering, James Cook University, Townsville, Australia
| | - Elsa Antunes
- College of Science and Engineering, James Cook University, Townsville, Australia.
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Egwunye J, Cardoso BR, Braat S, Ha T, Hanieh S, Hare D, Duan AX, Doronila A, Tran T, Tuan T, Fisher J, Biggs BA. The role of fingernail selenium in the association between arsenic, lead and mercury and child development in rural Vietnam: a cross-sectional analysis. Br J Nutr 2022; 129:1-9. [PMID: 35535482 DOI: 10.1017/s0007114522001374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
As, Pb and Hg are common environmental contaminants in low- and middle-income countries. We investigated the association between child toxicant exposure and growth and development and determined if this association was mitigated by Se concentration. Toxicant concentrations in fingernail samples, anthropometry and Bayley's Scales of Infant Development, 3rd edition domains were assessed in 36-month-old children whose mothers had been part of a randomised controlled trial in rural Vietnam. Multivariable regression analyses were performed to estimate the effect of toxicant exposure on clinical outcomes with adjustments for potential confounders and interaction with fingernail Se concentration. We analysed 658 children who had data for at least one physical or developmental outcome, and at least one toxicant measurement, and each of the covariates. Fingernail As concentration was negatively associated with language (estimate per 10 % increase in As: -0·19, 95 % CI: (-0·32, -0·05)). Pb was negatively associated with cognition (estimate per 10 % increase in Pb: -0·08 (-0·15, -0·02)), language (estimate per 10 % increase in Pb: -0·18 (-0·28, -0·10)) and motor skills (estimate per 10 % increase in Pb: -0·12 (-0·24, 0·00)). Hg was negatively associated with cognition (estimate per 10 % increase in Hg: -0·48, (-0·72, -0·23)) and language (estimate per 10 % increase in Hg -0·51, (-0·88, -0·13)) when Se concentration was set at zero in the model. As Se concentration increased, the negative associations between Hg and both cognition and language scores were attenuated. There was no association between toxicant concentration and growth. As, Pb and Hg concentrations in fingernails of 3-year-old children were associated with lower child development scores. The negative association between Hg and neurological development was reduced in magnitude with increasing Se concentration. Se status should be considered when assessing heavy metal toxicants in children and their impact on neurodevelopmental outcomes.
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Affiliation(s)
- Jacob Egwunye
- Department of Infectious Diseases, University of Melbourne, at the Peter Doherty Institute for Infection and Immunity, Victoria, 3000, Australia
| | - Barbara R Cardoso
- Department of Nutrition, Dietetics and Food, Monash University, Melbourne, VIC3004, Australia
| | - Sabine Braat
- Department of Infectious Diseases, University of Melbourne, at the Peter Doherty Institute for Infection and Immunity, Victoria, 3000, Australia
- Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Parkville, VIC3052, Australia
| | - Tran Ha
- Research and Training Centre for Community Development, Hanoi, Vietnam
| | - Sarah Hanieh
- Department of Infectious Diseases, University of Melbourne, at the Peter Doherty Institute for Infection and Immunity, Victoria, 3000, Australia
| | - Dominic Hare
- Department of Infectious Diseases, University of Melbourne, at the Peter Doherty Institute for Infection and Immunity, Victoria, 3000, Australia
- School of BioSciences, University of Melbourne, Parkville, VIC3050, Australia
| | - Alex Xiaofei Duan
- Melbourne TrACEES Platform and School of Chemistry, University of Melbourne, Parkville, VIC3010, Australia
| | - Augustine Doronila
- Melbourne TrACEES Platform and School of Chemistry, University of Melbourne, Parkville, VIC3010, Australia
| | - Thach Tran
- Research and Training Centre for Community Development, Hanoi, Vietnam
- Global and Women's Health, School of Public Health and Preventive Medicine, Monash University, Melbourne, VIC3004, Australia
| | - Tran Tuan
- Research and Training Centre for Community Development, Hanoi, Vietnam
| | - Jane Fisher
- Global and Women's Health, School of Public Health and Preventive Medicine, Monash University, Melbourne, VIC3004, Australia
| | - Beverley-Ann Biggs
- Department of Infectious Diseases, University of Melbourne, at the Peter Doherty Institute for Infection and Immunity, Victoria, 3000, Australia
- The Victorian Infectious Diseases Service, Royal Melbourne Hospital, Parkville, VIC3050, Australia
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