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Guo X, Zhao Z, Gao X, Fu H, Hu Z, Zhang X, Dong Y. Study on the adsorption performance of fly ash loaded on nano-FeS for chromium-containing wastewater treatment. Heliyon 2024; 10:e34661. [PMID: 39130456 PMCID: PMC11315189 DOI: 10.1016/j.heliyon.2024.e34661] [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: 02/27/2024] [Revised: 06/21/2024] [Accepted: 07/15/2024] [Indexed: 08/13/2024] Open
Abstract
In view of the problems caused by chromium-containing wastewater, such as environmental pollution, biological toxicity, and human health risks. Based on fly ash adsorption and nano-FeS reduction characteristics, fly ash loaded nano-FeS composite (nFeS-FA) was synthesized using mineral supported modification technology and ultrasonic precipitation method. The effect of adsorbent dosage, initial pH, contact time, and initial concentration of the solution on the adsorption of Cr(VI) and total Cr by nFeS-FA was investigated. The characteristics of Cr(VI) and total Cr adsorption by nFeS-FA were studied using adsorption isotherms, adsorption kinetics principles, as well as XRD, TEM, SEM-EDS, and BET analysis. The results demonstrated that under the conditions of nFeS-FA of 8 g/L, initial pH of 4, contact time of 150 min, and initial concentration of the solution at 100 mg/L, nFeS-FA achieved removal efficiency of 87.85 % for Cr(VI) and 71.77 % for total Cr. The adsorption of Cr(VI) and total Cr by nFeS-FA followed the Langmuir model and pseudo-second-order kinetic model, indicating monolayer adsorption with chemical adsorption as the dominant mechanism. XRD, TEM, SEM-EDS, and BET revealed that the flaky nano-FeS was uniformly distributed on the surface of fly ash, exhibiting good dispersion and thereby increasing the specific surface area. During the adsorption experiments, nFeS-FA reacted with Cr(VI), and the generated Fe3+ mainly existed as FeOOH precipitation, while S2- reacted with Cr(III) to produce Cr2S3 precipitation. Therefore, nFeS-FA exhibited excellent adsorption performance towards Cr(VI) and total Cr. It can serve as a technological reference for the remediation of heavy metal chromium pollution in the field of water treatment.
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Affiliation(s)
- Xuying Guo
- College of Science, Liaoning Technical University, Fuxin, 123000, Liaoning, China
- College of Mining, Liaoning Technical University, Fuxin, 123000, Liaoning, China
| | - Zilong Zhao
- College of Mining, Liaoning Technical University, Fuxin, 123000, Liaoning, China
| | - Xinle Gao
- College of Mining, Liaoning Technical University, Fuxin, 123000, Liaoning, China
| | - Honglei Fu
- College of Civil Engineering, Liaoning Technical University, Fuxin, 123000, Liaoning, China
| | - Zhiyong Hu
- College of Mining, Liaoning Technical University, Fuxin, 123000, Liaoning, China
| | - Xiaoyue Zhang
- College of Civil Engineering, Liaoning Technical University, Fuxin, 123000, Liaoning, China
| | - Yanrong Dong
- College of Civil Engineering, Liaoning Technical University, Fuxin, 123000, Liaoning, China
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An W, Liu Y, Chen H, Sun X, Wang Q, Hu X, Di J. Adsorption properties of Pb(II) and Cd(II) in acid mine drainage by oyster shell loaded lignite composite in different morphologies. Sci Rep 2024; 14:11627. [PMID: 38773279 PMCID: PMC11109245 DOI: 10.1038/s41598-024-62506-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Accepted: 05/17/2024] [Indexed: 05/23/2024] Open
Abstract
A new idea to alleviate environmental pollution is the development of low-cost adsorbents using natural minerals and fishery wastes to treat high concentrations of heavy metal pollutants in acid mine drainage (AMD). Adsorbent morphology, adsorptive and regenerative capacity, and application potential are limiting factors for their large-scale use. Oyster shells capable of releasing alkalinity were loaded on the surface of lignite to develop two composite adsorbents with different morphologies (powdery and globular) for the treatment of AMD containing Pb(II) and Cd(II). The results show that the ability of the adsorbent to treat AMD is closely related to its morphologies. The pseudo-second-order kinetic model and the Langmuir model are suitable to describe the adsorption process of OS-M(P), and the maximum adsorption saturation capacities of Pb(II) and Cd(II) are 332.6219 mg/g and 318.9854 mg/g, respectively. The pseudo-second-order kinetic model and the Freundlich model are suitable to describe the adsorption process of OS-M(G). A synergistic result of electrostatic adsorption, neutralization precipitation, ion exchange and complex reaction is achieved in the removal of Pb(II) and Cd(II) by two morphologies of adsorbents. The regeneration times (5 times) and recovery rate (75.75%) of OS-M(G) are higher than those of OS-M(P) (3 times) and recovery rate (20%). The ability of OS-M(G) to treat actual AMD wastewater is still better than that of OS-M(P). OS-M(G) can be used as a promising environmentally friendly adsorbent for the long-term remediation of AMD. This study provides a comprehensive picture of resource management and reuse opportunities for natural mineral and fishery wastes.
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Affiliation(s)
- Wenbo An
- Ordos Institute of Liaoning Technical University, Ordos, 017000, China.
- School of Civil Engineering, Liaoning Technical University, 88 Yulong Road, Xihe District, Fuxin City, 123000, Liaoning Province, China.
| | - Yifan Liu
- School of Civil Engineering, Liaoning Technical University, 88 Yulong Road, Xihe District, Fuxin City, 123000, Liaoning Province, China
| | - He Chen
- School of Mechanics and Engineering, Liaoning Technical University, Fuxin, 123000, China
| | - Xueying Sun
- Shanghai Chemical Industrial Zone Sino-French Water Development Co., LTD, Shanghai, 200000, China
| | - Qiqi Wang
- School of Civil Engineering, Liaoning Technical University, 88 Yulong Road, Xihe District, Fuxin City, 123000, Liaoning Province, China
| | - Xuechun Hu
- School of Civil Engineering, Liaoning Technical University, 88 Yulong Road, Xihe District, Fuxin City, 123000, Liaoning Province, China
| | - Junzhen Di
- School of Civil Engineering, Liaoning Technical University, 88 Yulong Road, Xihe District, Fuxin City, 123000, Liaoning Province, China
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Wang Y, Dong Y, Shao J, Zhao Z, Zhai H. Study on Preparation of Calcium-Based Modified Coal Gangue and Its Adsorption Dye Characteristics. Molecules 2024; 29:2183. [PMID: 38792045 PMCID: PMC11123816 DOI: 10.3390/molecules29102183] [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: 03/22/2024] [Revised: 04/24/2024] [Accepted: 05/03/2024] [Indexed: 05/26/2024] Open
Abstract
Efficient and thorough treatment of dye wastewater is essential to achieve ecological harmony. In this study, a new type of calcium-based modified coal gangue (Ca-CG) was prepared by using solid waste coal gangue as raw material and a CaCl2 modifier, which was used for the removal of malachite green, methylene blue, crystal violet, methyl violet and other dyes in water. When the dosage of Ca-CG was 1-5 g/L, the dosage of Ca-CG was the main factor affecting the dye adsorption effect. The adsorption effects of Ca-CG on four dyes were as follows: malachite green > crystal violet > methylene blue > methyl violet. Kinetics, isotherms and thermodynamic analysis showed that the adsorption of malachite green, methyl blue, crystal violet and methyl violet by Ca-CG fitted the second-order kinetic model, and adsorption with chemical reaction is the main process. The adsorption of four dyes by Ca-CG conformed to the Freundlich model, which is dominated by multi-molecular layer adsorption, and the adsorption was easy to carry out. The adsorption process of Ca-CG on the four dyes was spontaneous. The results of FTIR, XRD and SEM showed that the calcium-based materials such as lipscombite and dolomite were the key to the adsorption of malachite green by Ca-CG, and the main mechanisms for the adsorption of malachite green by Ca-CG are surface precipitation, electrostatic action, and chelation reaction. Ca-CG adsorption has great potential for the removal of dye wastewater.
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Affiliation(s)
- Yihan Wang
- College of Civil Engineering, Liaoning Technical University, Fuxin 123000, China; (Y.W.); (H.Z.)
| | - Yanrong Dong
- College of Civil Engineering, Liaoning Technical University, Fuxin 123000, China; (Y.W.); (H.Z.)
| | - Junli Shao
- College of Mechanics and Engineering, Liaoning Technical University, Fuxin 123000, China
| | - Zilong Zhao
- College of Mining, Liaoning Technical University, Fuxin 123000, China;
| | - Hongyu Zhai
- College of Civil Engineering, Liaoning Technical University, Fuxin 123000, China; (Y.W.); (H.Z.)
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Guo X, Fu H, Gao X, Zhao Z, Hu Z. Study on the adsorption of Zn(II) and Cu(II) in acid mine drainage by fly ash loaded nano-FeS. Sci Rep 2024; 14:9927. [PMID: 38688999 PMCID: PMC11061279 DOI: 10.1038/s41598-024-58815-z] [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: 08/24/2023] [Accepted: 04/03/2024] [Indexed: 05/02/2024] Open
Abstract
Aiming at the acid mine drainage (AMD) in zinc, copper and other heavy metals treatment difficulties, severe pollution of soil and water environment and other problems. Through the ultrasonic precipitation method, this study prepared fly ash-loaded nano-FeS composites (nFeS-F). The effects of nFeS-F dosage, pH, stirring rate, reaction time and initial concentration of the solution on the adsorption of Zn(II) and Cu(II) were investigated. The data were fitted by Lagergren first and second-order kinetic equations, Internal diffusion equation, Langmuir and Freundlich isotherm models, and combined with SEM, TEM, FTIR, TGA, and XPS assays to reveal the mechanism of nFeS-F adsorption of Zn(II) and Cu(II). The results demonstrated that: The removal of Zn(II) and Cu(II) by nFeS-F could reach 83.36% and 70.40%, respectively (The dosage was 8 g/L, pH was 4, time was 150 min, and concentration was 100 mg/L). The adsorption process, mainly chemical adsorption, conforms to the Lagergren second-order kinetic equation (R2 = 0.9952 and 0.9932). The adsorption isotherms have a higher fitting degree with the Langmuir model (R2 = 0.9964 and 0.9966), and the adsorption is a monolayer adsorption process. This study can provide a reference for treating heavy metals in acid mine drainage and resource utilization of fly ash.
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Affiliation(s)
- Xuying Guo
- College of Civil Engineering, Liaoning Technical University, Fuxin, 123000, Liaoning, China.
- College of Science, Liaoning Technical University, Fuxin, 123000, Liaoning, China.
- College of Mining, Liaoning Technical University, Fuxin, 123000, Liaoning, China.
| | - Honglei Fu
- College of Civil Engineering, Liaoning Technical University, Fuxin, 123000, Liaoning, China
| | - Xinle Gao
- College of Mining, Liaoning Technical University, Fuxin, 123000, Liaoning, China
| | - Zilong Zhao
- College of Mining, Liaoning Technical University, Fuxin, 123000, Liaoning, China
| | - Zhiyong Hu
- College of Mining, Liaoning Technical University, Fuxin, 123000, Liaoning, China
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Dai M, Di J, Zhang T, Li T, Dong Y, Bao S, Fu S. Reparation of nano-FeS by ultrasonic precipitation for treatment of acidic chromium-containing wastewater. Sci Rep 2024; 14:211. [PMID: 38168529 PMCID: PMC10761992 DOI: 10.1038/s41598-023-50070-y] [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: 09/24/2023] [Accepted: 12/14/2023] [Indexed: 01/05/2024] Open
Abstract
Nano-FeS is prone to agglomeration in the treatment of chromium-containing wastewater, and ultrasonic precipitation was used to synthesize nano-FeS to increase its dispersion. The optimization of the preparation method was carried out by single factor method (reaction temperature, Fe/S molar ratio and FeSO4 dropping flow rate) and response surface methodology. Dynamic experiments were constructed to investigate the long-term remediation effect and water column changes of nano-FeS and its solid particles. The changes of the remediation materials before and after the reaction were observed by SEM, and the mechanism of the remediation of chromium-containing wastewater by nano-FeS prepared by ultrasonication was revealed by XRD. The results showed that the reaction temperature of 12 °C, Fe/S molar ratio of 3.5 and FeSO4 dropping flow rate of 0.5 mL/s were the best parameters for the preparation of nano-FeS. The nano-FeS has efficient dispersion and well-defined mesoporous structure in the form of needles and whiskers of 40-80 nm. The dynamic experiments showed that the average removal of Cr(VI) and total chromium by nano-FeS and its immobilized particles were 94.97% and 63.51%, 94.93% and 45.76%, respectively. Fe2+ and S2- ionized by the FeS nanoparticles rapidly reduced Cr(VI) to Cr(III). Part of S2- may reduce Fe3+ to Fe2+, forming a small iron cycle that gradually decreases with the ion concentration. Cr(III) and Fe2+ form Cr(OH)3 and FeOOH, respectively, with the change of aqueous environment. Another part of S2- reacts with Cr(III) to form Cr2S3 precipitate or is oxidized to singlet sulfur. The FeS nanoparticles change from short rod-shaped to spherical shape. Compared with the conventional chemical precipitation method, the method used in this study is simple, low cost, small particle size and high removal rate per unit.
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Affiliation(s)
- Mengjia Dai
- College of Mining, Liaoning Technical University, Fuxin, 123000, China
| | - Junzhen Di
- College of Civil Engineering, Liaoning Technical University, Fuxin, 123000, China.
| | - Ting Zhang
- College of Civil Engineering, Liaoning Technical University, Fuxin, 123000, China
| | - Tuoda Li
- College of Civil Engineering, Liaoning Technical University, Fuxin, 123000, China
| | - Yanrong Dong
- College of Civil Engineering, Liaoning Technical University, Fuxin, 123000, China
| | - Sihang Bao
- College of Mining, Liaoning Technical University, Fuxin, 123000, China
| | - Saiou Fu
- College of Civil Engineering, Liaoning Technical University, Fuxin, 123000, China
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