1
|
Chen X, Zhou Y, Li J, Pillai SC, Bolan N, He J, Li N, Xu S, Chen X, Lin Q, Wang H. Activated peroxydisulfate by sorghum straw-based biochar for enhanced tartrazine degradation: Roles of adsorption and radical/nonradical processes. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 316:120665. [PMID: 36395910 DOI: 10.1016/j.envpol.2022.120665] [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: 09/15/2022] [Revised: 10/29/2022] [Accepted: 11/12/2022] [Indexed: 06/16/2023]
Abstract
Biochar obtained from biomass waste through pyrolysis has significant potential in wastewater treatment due to its large specific surface area and multi-functional active sites. In current study, sorghum straw (SS) was pyrolyzed to prepare various biochar under nitrogen atmosphere. Adsorption kinetics of prepared biochar toward tartrazine (TTZ) was systematically investigated, and the biochar was also characterized by using multiple techniques to explore the contribution of physicochemical properties to adsorption. Then, the biochar with optimum TTZ adsorption performance, was also applied as a catalyst for peroxydisulfate (PDS) activation to degrade TTZ. Factors including PDS concentration, solution pH, and reaction temperature were examined. The optimized degradation rate constant of TTZ (1.1627 min-1) was achieved under the conditions at 2 mM PDS, pH of 3, and 23 °C. In addition, the free radical trapping experiments and EPR spectra revealed that the reactive substances of electron (e-), 1O2, SO4•-, O2•-, and •OH contributed to TTZ degradation. Density Functional Theory (DFT) also concluded that the atoms C(6), O(12), N(16), N(17), C(18) and N(22) in TTZ molecule showed larger f0 values which are vulnerable to radical attack. Therefore, the synergistic mechanism embodying adsorption and radical/non-radical processes were proposed. Besides, the degradation pathways of TTZ were identified with the aid of HPLC/MS technique, indicating that multiple reaction processes containing the symmetrical cleavage of azo bonds, the asymmetrical cleavage of C-N, desulfonation, and benzene-like structure cracking were involved. Therefore, this study provides a simple and effective catalytic system for TTZ degradation, and also realizes the resource utilization of solid waste.
Collapse
Affiliation(s)
| | - Yu Zhou
- Foshan University, Foshan, 528225, China
| | - Jiesen Li
- Foshan University, Foshan, 528225, China; Department of Research and Development, Guangzhou Ginpie Technology Co., Ltd., Guangzhou, 510670, China
| | - Suresh C Pillai
- Nanotechnology and Bio-Engineering Research Group and the Health and Biomedical (HEAL) Research Centre, Atlantic Technological University, ATU Sligo, Ash Lane, Sligo, F91 YW50, Ireland
| | - Nanthi Bolan
- School of Agriculture and Environment, The University of Western Australia, 6001, Perth, WA, Australia; The UWA Institute of Agriculture, The University of Western Australia, 6001, Perth, WA, Australia
| | - Juhua He
- Foshan University, Foshan, 528225, China
| | - Ning Li
- Foshan University, Foshan, 528225, China.
| | - Song Xu
- Foshan University, Foshan, 528225, China
| | - Xin Chen
- Foshan University, Foshan, 528225, China
| | | | | |
Collapse
|
2
|
Li H, Jiang Q, Li R, Zhang B, Zhang J, Zhang Y. Passivation of lead and cerium in soil facilitated by biochar-supported phosphate-doped ferrihydrite: Mechanisms and microbial community evolution. JOURNAL OF HAZARDOUS MATERIALS 2022; 436:129090. [PMID: 35596987 DOI: 10.1016/j.jhazmat.2022.129090] [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: 03/04/2022] [Revised: 04/16/2022] [Accepted: 05/04/2022] [Indexed: 06/15/2023]
Abstract
The massive exploitation and application of heavy metals and rare earth elements (REEs) lead to their exceeding the standard in soil. Herein, a new type of biochar supported phosphorus doped ferrihydrite (P-FH@BC) has been designed and enhance passivation of Pb and Ce in soil. SEM images of P-FH@BC showed P-FH nanoparticles adhered to the natural cavity and large pore diameter on the surface of biochar, which greatly avoided the agglomeration of nanoparticles. The residual state of lead or cerium increased 161.4% or 43.9% by adding 3% P-FH@BC after 90 days of incubation in 500 mg/kg lead or cerium simulated contaminated soil. The passivation of cerium by P-FH@BC is obviously inhibited with the coexistence of lead. The results of P-FH@BC magnetically separated from the soil characterization indicate that complexation, co-precipitation and the formation of secondary minerals mainly contribute to the high efficiency passivation ability of P-FH@BC for lead and cerium. By changing the addition of P-FH@BC, the soil pH can be adjusted and the soil organic matter and P contents can be improved. Moreover, P-FH@BC is an environmentally friendly material without ecotoxicity. And bacterial richness and diversity in soil were improved after passivation of Pb and Ce by adding P-FH@BC.
Collapse
Affiliation(s)
- Hui Li
- School of Resources & Environment, Northeast Agricultural University, Harbin150030, China
| | - Qun Jiang
- School of Resources & Environment, Northeast Agricultural University, Harbin150030, China
| | - Ruizhen Li
- School of Resources & Environment, Northeast Agricultural University, Harbin150030, China
| | - Bo Zhang
- School of Resources & Environment, Northeast Agricultural University, Harbin150030, China
| | - Jiaxing Zhang
- School of Resources & Environment, Northeast Agricultural University, Harbin150030, China
| | - Ying Zhang
- School of Resources & Environment, Northeast Agricultural University, Harbin150030, China.
| |
Collapse
|
3
|
Li H, Jiang Q, Li R, Zhang R, Jiang S, Zhang J, Qu J, Zhang L, Zhang Y. Facile one-step synthesis of biochar supported iron nanoparticles for enhancing Pb(II) scavenging from water: Performance and mechanisms. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.118815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
4
|
Altwala A, Mokaya R. Rational synthesis of microporous carbons for enhanced post-combustion CO 2 capture via non-hydroxide activation of air carbonised biomass. RSC Adv 2022; 12:20080-20087. [PMID: 35919600 PMCID: PMC9275833 DOI: 10.1039/d2ra02661a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 07/05/2022] [Indexed: 11/30/2022] Open
Abstract
This work explores the use of a less corrosive activating agent, potassium oxalate (PO), in combination with difficult to activate carbonaceous matter for the preparation of activated carbons. The design of the study allowed a fuller understanding of the workings of PO compared to hydroxide (KOH) activation, and also optimised the preparation of highly microporous carbons with exceptional CO2 storage capacity under low pressure (≤1 bar) conditions at ambient temperature. The PO activated carbons have a surface area of up to 1760 m2 g−1 and are highly microporous with virtually all of the surface area arising from micropores. The porosity of the PO activated carbons can be readily tailored towards having pores of size 6–8 Å, which are highly suited for CO2 storage at low pressure (i.e., post-combustion capture). At 25 °C, the PO activated carbons can store up to 1.8 and 5.0 mmol g−1 of CO2 at 0.15 bar and 1 bar, respectively. On the other hand, KOH activated carbons reach a higher surface area of up to 2700 m2 g−1, and store up to 1.0 and 4.0 mmol g−1 of CO2. This work demonstrates that PO may be used as a mild, less corrosive and less toxic activating agent for the rational and targeted synthesis of biomass-derived activated carbons with tailored porosity. The targeted synthesis may be aided by careful selection of the biomass starting material as guided by the O/C ratio of the biomass. Rational combination of a mild activating agent (potassium oxalate) and air carbonised biomass, which is resistant to activation, yields highly microporous carbons with enhanced post-combustion CO2 uptake.![]()
Collapse
Affiliation(s)
- Afnan Altwala
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, UK
- Department of Chemistry, College of Science Al-Zulfi, Majmaah University, Al-Majmaah, 11952, Saudi Arabia
| | - Robert Mokaya
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, UK
| |
Collapse
|
5
|
Zhang H, Su X, Sun B, Xu Y, Gong J. Citrate iron complex induced dramatically enhanced oxidation of atrazine with bimetallic Bi/Fe 0: Reactivity, oxidation and mechanism. CHEMOSPHERE 2021; 282:131100. [PMID: 34119736 DOI: 10.1016/j.chemosphere.2021.131100] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 05/12/2021] [Accepted: 05/31/2021] [Indexed: 06/12/2023]
Abstract
The oxidative degradation of atrazine (ATR) using bimetallic Bi/Fe0 nanoparticles cooperated with citric acid (CA) and sodium citrate (NaCA) without extra addition of H2O2 or another oxidant was conducted. Almost 73% of ATR was removed in Bi/Fe0+NaCA + CA buffer system in 3 h, and the bimetallic Bi/Fe0 performs high stability and long service life in the buffer system according to the results of cyclic degradation experiments. The citrate iron complex of Fe(II)[Cit]- played the key role for the degradation process since it could quickly react with the generated H2O2 to produce free radicals in the Bi/Fe0+NaCA + CA system, which broadened the applicable pH range of the traditional Fenton reaction and promoted the oxidative degradation process of ATR. The possible degradation pathways of ATR were also investigated. In the Bi/Fe0+NaCA + CA buffer system, twelve kinds of ATR intermediate products were detected, of which the main products were dechlorination products and alkyl oxidative products. Due to the pH controllable of the Bi/Fe0+NaCA + CA system, it could reduce the acidity impact on the environment and makes the additional impact on the environment lower. Therefore, this work provides a new strategy for the degradation of ATR.
Collapse
Affiliation(s)
- Huimin Zhang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Xiaoming Su
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Benjian Sun
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Yake Xu
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Jianyu Gong
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.
| |
Collapse
|
6
|
Sevilla M, Díez N, Fuertes AB. More Sustainable Chemical Activation Strategies for the Production of Porous Carbons. CHEMSUSCHEM 2021; 14:94-117. [PMID: 33047490 DOI: 10.1002/cssc.202001838] [Citation(s) in RCA: 54] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 09/25/2020] [Indexed: 06/11/2023]
Abstract
The preparation of porous carbons attracts a great deal of attention given the importance of these materials in many emerging applications, such as hydrogen storage, CO2 capture, and energy storage in supercapacitors and batteries. In particular, porous carbons produced by applying chemical activation methods are preferred because of the high pore development achieved. However, given the environmental risks associated with conventional activating agents such as KOH, the development of greener chemical activation methodologies is an important objective. This Review summarizes recent progress in the production of porous carbons by using more sustainable strategies based on chemical activation. The use of less-corrosive chemical agents as an alternative to KOH is thoroughly reviewed. In addition, progress achieved to date by using emerging self-activation methodologies applied to organic salts and biomass products is also discussed.
Collapse
Affiliation(s)
- Marta Sevilla
- Instituto de Ciencia y Tecnología del Carbono, INCAR-CSIC, Francisco Pintado Fe, 26., 33011, Oviedo, Spain
| | - Noel Díez
- Instituto de Ciencia y Tecnología del Carbono, INCAR-CSIC, Francisco Pintado Fe, 26., 33011, Oviedo, Spain
| | - Antonio B Fuertes
- Instituto de Ciencia y Tecnología del Carbono, INCAR-CSIC, Francisco Pintado Fe, 26., 33011, Oviedo, Spain
| |
Collapse
|