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Samaraweera H, Zahir A, Alam SS, Perera SS, Masud MAA, Khan AH, Oguntuyi DO, Yunusu W, Shin WS, Mohamed MM, Mlsna T. Sustainable utilization of Fe 3O 4-modified activated lignite for aqueous phosphate removal and ANN modeling. ENVIRONMENTAL RESEARCH 2024; 260:119618. [PMID: 39009211 DOI: 10.1016/j.envres.2024.119618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Revised: 06/03/2024] [Accepted: 07/12/2024] [Indexed: 07/17/2024]
Abstract
Lignites are widely available and cost-effective in many countries. Sustainable methods for their utilization drive innovation, potentially advancing environmental sustainability and resource efficiency. In the present study, Fe3O4 (∼25.1 nm) supported on KOH-activated lignite (A-L) displayed 8 times higher phosphate removal than pristine A-L (67.6 mg/g vs. 8.5 mg/g at pH 5, 50 mg of absorbent in 25 mL of 1500 ppm [phosphate]), owing to its abundant Fe3O4 (10 wt% of Fe) nanoparticle content. The removal occurred within ∼2 h, following a pseudo-second-order kinetic model. Across pH levels ranging from 5.0 to 9.0, Fe3O4-A-L's phosphate removal occurs via both chemisorption and precipitation, as evident by kinetic, pH, and XPS analyses. The phosphate adsorption fits better with the Freundlich isotherm. The combined benefits of facile recovery, rapid phosphate uptake, straightforward regeneration, and attractive post-adsorption benefits (e.g., possibly use as a Fe, P-rich fertilizer) make magnetic Fe3O4-A-L a promising candidate for real-world applications. Artificial Neural Network (ANN) modeling indicates an excellent accuracy (R2 = 0.99) in predicting the amount of phosphate removed by Fe3O4-A-L. Sensitivity analysis revealed both temperature and initial concentration as the most influencing factors. Leveraging lignite in environmentally friendly applications not only addresses immediate challenges but also aligns with sustainability goals. The study clearly articulates the potential benefits of utilizing lignite for sustainable phosphate removal and recovery, offering avenues for mitigating environmental concerns while utilizing resources efficiently.
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Affiliation(s)
- Hasara Samaraweera
- Department of Chemistry, Mississippi State University, Mississippi State, MS, USA; Department of Civil and Environmental Engineering, Western University, ON, N6H0B6, Canada.
| | - Abdul Zahir
- National Textile Research Centre, National Textile University, Faisalabad, 37610, Pakistan
| | - Shah Saud Alam
- Mechanical Engineering, University of Kansas, Lawrence, KS, 66045, USA
| | - S Sameera Perera
- Lumigen Instrument Center, Wayne State University, Detroit, MI, 48201, USA
| | - Md Abdullah Al Masud
- School of Architecture, Civil, Environmental and Energy Engineering, Kyungpook National University, Daegu, 41566, Republic of Korea
| | - Afzal Husain Khan
- Civil Engineering Department, College of Engineering, Jazan University, Jazan, Saudi Arabia
| | | | - Wana Yunusu
- Department of Chemistry, Mississippi State University, Mississippi State, MS, USA
| | - Won Sik Shin
- School of Architecture, Civil, Environmental and Energy Engineering, Kyungpook National University, Daegu, 41566, Republic of Korea
| | - Mohamed Mostafa Mohamed
- Department of Civil and Environmental Engineering, United Arab Emirates University, Al Ain, P.O. Box 15551, United Arab Emirates; National Water and Energy Center, United Arab Emirates University, Al Ain, P.O. Box 15551, United Arab Emirates
| | - Todd Mlsna
- Department of Chemistry, Mississippi State University, Mississippi State, MS, USA
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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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Hasani MG, Berisha A, Hetemi. D, Decorse P, Pinson J, Podvorica FI. Surface Modification of Lignite with Alkyl and Mixed Alkyl-Aryl Films Generated from an Aryl Diazonium Salt and Alkyl Halides: Experimental Results and Theoretical Analyses. ChemistryOpen 2024; 13:e202300134. [PMID: 38051924 PMCID: PMC11004459 DOI: 10.1002/open.202300134] [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: 08/30/2023] [Revised: 10/25/2023] [Indexed: 12/07/2023] Open
Abstract
In search of new possible uses of cheap lignite from the Kosova Bassin, the surface of lignite powders is modified with alkyl or mixed alkyl-aryl layers. Modification is performed in aqueous acid solution containing an aryl diazonium salt and an alkyl halide compound in millimolar concentration, in the presence of potassium iodide as a reducing agent at equimolar concentration. Attachment of alkyl films substituted with carboxylic groups and aryl films with nitro or bis-trifluoromethyl groups is characterized by IRATR and XPS spectroscopy. The formation of a stable interface during the grafting reactions of alkyl and aryl moieties with lignite surface has been confirmed by theoretical calculations. Aryl diazonium salts once chemically or spontaneously reduced are a source of aryl radicals, able to attach chemically to the material surface or to react with alkyl halides by abstracting the halogen atom. If the aryl diazonium salts are unable to graft to the coal surface due to steric hindrance, they can, nevertheless, abstract an iodine or bromine atom to generate alkyl radicals that react with the material surface.
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Affiliation(s)
| | - Avni Berisha
- Chemistry DepartmentUniversity of Prishtina10000PrishtinaKosovo
- NanoAlb-Unit of Albanian Nanoscience and Nanotechnology1000TiranaAlbania
| | - Dardan Hetemi.
- Department of PharmacyUniversity of Prishtina10000PrishtinaKosovo
- NanoAlb-Unit of Albanian Nanoscience and Nanotechnology1000TiranaAlbania
| | | | - Jean Pinson
- Université Paris Cité, CNRS, ITODYS75013ParisFrance
| | - Fetah I. Podvorica
- Chemistry DepartmentUniversity of Prishtina10000PrishtinaKosovo
- Academy of Sciences and Arts of Kosova, Rr. “Agim Ramadani” Nr. 30510000PrishtinaKosovo
- NanoAlb-Unit of Albanian Nanoscience and Nanotechnology1000TiranaAlbania
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Quansah JO, Obiri-Nyarko F, Karikari AY. Adsorptive removal of dissolved Iron from groundwater by brown coal - A low-cost adsorbent. JOURNAL OF CONTAMINANT HYDROLOGY 2024; 260:104283. [PMID: 38101230 DOI: 10.1016/j.jconhyd.2023.104283] [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: 06/30/2023] [Revised: 11/05/2023] [Accepted: 12/08/2023] [Indexed: 12/17/2023]
Abstract
Iron (Fe) contamination in groundwater is a widespread issue, necessitating the implementation of efficient removal methods to ensure the provision of safe drinking water. To contribute to the development of effective and sustainable solutions for addressing Fe contamination problems, this study investigated the potential of natural brown coal (BC) as a cost-effective adsorbent for removing dissolved Fe from groundwater. The study also explored the regeneration and reusability potential, as well as the effects of operational parameters, including pH, temperature, adsorbate concentration, and competitive ions, on the adsorption process. The equilibrium data fitted very well with the Langmuir model (R2 = 0.983), yielding a maximum adsorption capacity of 1.41 mg g-1. The adsorption kinetics were well described by the pseudo-second-order kinetic model. Notably, higher solution pH, Fe concentration, and temperature values led to higher Fe removal. The adsorption process exhibited endothermic behaviour, accompanied by an increase in randomness at the interface between the BC and the Fe. The BC was easily regenerated and maintained good adsorption capacity after four cycles of adsorption and regeneration. However, the presence of high-valent cations could affect its performance. Fourier-transform infrared spectrometry, coupled with structural and aqueous solution elemental analyses, revealed a synergetic adsorption mechanism, comprising ion-exchange with mono and divalent basic cations and complexation with functional groups. Overall, these findings highlight the potential of brown coal as a cost-effective adsorbent for Fe removal from groundwater.
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Affiliation(s)
- Jude Ofei Quansah
- Environmental Chemistry and Sanitation Engineering Division, CSIR-Water Research Institute, P.O. Box M32, Accra, Ghana
| | - Franklin Obiri-Nyarko
- Groundwater and Geoscience Division, CSIR-Water Research Institute, P.O. Box M32, Accra, Ghana.
| | - Anthony Yaw Karikari
- Environmental Chemistry and Sanitation Engineering Division, CSIR-Water Research Institute, P.O. Box M32, Accra, Ghana
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Sienkiewicz E, Gąsiorowski M, Sekudewicz I, Kowalewska U, Matoušková Š. Responses of diatom composition and teratological forms to environmental pollution in a post-mining lake (SW Poland). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:110623-110638. [PMID: 37792194 PMCID: PMC10625521 DOI: 10.1007/s11356-023-30113-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Accepted: 09/24/2023] [Indexed: 10/05/2023]
Abstract
Various types of environmental stressors, such as heavy metals, lignite residues, or extremely low water pH, cause the formation of teratological forms of diatoms during the reproductive cycle. The damage mainly includes an abnormal diatom valve outline, changes in the striation pattern, anomalies in the raphe line/sternum, reduction in the cell size, metabolism alterations, or combined deformities. Diatom remains with such morphological deformities occur in the sediments of post-mining lake ŁK-46 (SW Poland). This lake was formed by excavation after the end of lignite exploitation in the mid-1960s. The percentage of teratological valves in the studied lake ranged from 12 to 33% of the relative abundance. The majority of abnormal diatoms have been observed in species of Eunotia. The reconstruction of the diatom-inferred pH (DI-pH), together with the concentration of heavy metals in the sediments and contemporary measurements of the water pH, indicates that the lake was contaminated to varying degrees and was acidic from the beginning of lake creation until today. The lake is located in an area of acid mine drainage (AMD), and in its vicinity, there are overburden heaps containing lignite residues, which are eroded and supplied to the lake, constantly acidifying the water. In the youngest sediments, the concentration of heavy metals increased, while the percentage of abnormal diatoms decreased. Determining which factor, i.e., extremely low water pH and the presence of lignite or heavy metals, was responsible for the formation or reduction of teratogenic forms of diatoms is very difficult.
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Affiliation(s)
- Elwira Sienkiewicz
- Institute of Geological Sciences, Polish Academy of Sciences, Research Centre at Warsaw, St. Twarda 51/55, 00818, Warsaw, Poland.
| | - Michał Gąsiorowski
- Institute of Geological Sciences, Polish Academy of Sciences, Research Centre at Warsaw, St. Twarda 51/55, 00818, Warsaw, Poland
| | - Ilona Sekudewicz
- Institute of Geological Sciences, Polish Academy of Sciences, Research Centre at Warsaw, St. Twarda 51/55, 00818, Warsaw, Poland
| | - Urszula Kowalewska
- Institute of Geological Sciences, Polish Academy of Sciences, Research Centre at Warsaw, St. Twarda 51/55, 00818, Warsaw, Poland
| | - Šárka Matoušková
- Institute of Geology, Czech Academy of Sciences, Rozvojová 269, Prague, 165 00, Czech Republic
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Cheng J, Zhang S, Fang C, Ma L, Duan J, Fang X, Li R. Removal of Heavy Metal Ions from Aqueous Solution Using Biotransformed Lignite. Molecules 2023; 28:5031. [PMID: 37446692 DOI: 10.3390/molecules28135031] [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: 05/31/2023] [Revised: 06/24/2023] [Accepted: 06/26/2023] [Indexed: 07/15/2023] Open
Abstract
Heavy metal pollution caused by industrial wastewater such as mining and metallurgical wastewater is a major global concern. Therefore, this study used modified lignite as a low-cost adsorbent for heavy metal ions. Pingzhuang lignite was dissolved and modified using Fusarium lignite B3 to prepare a biotransformed-lignite adsorbent (BLA). The O, H, and N contents of the BLA increased after transformation, and the specific surface area increased from 1.81 to 5.66 m2·g-1. Various adsorption properties were investigated using an aqueous solution of Cu(Ⅱ). The kinetic and isothermal data were well-fitted by pseudo-second-order and Langmuir models, respectively. The Langmuir model showed that the theoretical Cu(II) adsorption capacity was 71.47 mg·g-1. Moreover, large particles and a neutral pH were favorable for the adsorption of heavy metal ions. The adsorption capacities of raw lignite and BLA were compared for various ions. Microbial transformation greatly improved the adsorption capacity, and the BLA had good adsorption and passivation effects with Cu(II), Mn(II), Cd(II), and Hg(II). Investigation of the structural properties showed that the porosity and specific surface area increased after biotransformation, and there were more active groups such as -COOH, Ar-OH, and R-OH, which were involved in the adsorption performance.
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Affiliation(s)
- Jianguo Cheng
- Inner Mongolia Engineering Research Center of Comprehensive Utilization of Bio-Coal Chemical Industry, Baotou 014010, China
- School of Chemistry and Chemical Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China
| | - Shanfei Zhang
- Shandong Shengli Bioengineering Co., Ltd., Jining 272000, China
| | - Chen Fang
- School of Chemistry and Chemical Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China
| | - Litong Ma
- Inner Mongolia Engineering Research Center of Comprehensive Utilization of Bio-Coal Chemical Industry, Baotou 014010, China
- School of Chemistry and Chemical Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China
| | - Jianguo Duan
- School of Chemistry and Chemical Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China
| | - Xu Fang
- School of Chemistry and Chemical Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China
| | - Rihong Li
- Inner Mongolia Tongwei High Pure Crystal Silicon Co., Ltd., Baotou 014010, China
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Fu S, Di J, Guo X, Dong Y, Bao S, Li H. Preparation of lignite-loaded nano-FeS and its performance for treating acid Cr(VI)-containing wastewater. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:3351-3366. [PMID: 35947258 DOI: 10.1007/s11356-022-22411-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 08/01/2022] [Indexed: 06/15/2023]
Abstract
In this study, lignite-loaded nano-FeS (nFeS@Lignite) was successfully prepared by ultrasonic precipitation, and its potential for treating acid Cr(VI)-containing wastewater was explored. The results showed that the 40--80-nm rod-shaped nFeS was successfully loaded onto lignite particles, and the maximum adsorption capacity of Cr(VI) by nFeS@Lignite reached 33.08 mg∙g-1 (reaction time = 120 min, pH = 4, temperature = 298.15 K). The adsorption process of Cr(VI) by nFeS@Lignite fitted the pseudo-second-order model and the Langmuir isotherm model, and thermodynamic results showed that the adsorption process was an endothermic process with an adsorption enthalpy of 28.0958 kJ·mol-1. The inhibition intensity of coexisting anions on Cr(VI) removal was in the order of PO43- > NO3- > SO42- > Cl-, and the increase of ionic strength resulted in more pronounced inhibition. Electrostatic adsorption, reduction, and precipitation were synergistically engaged in the adsorption of Cr(VI) by nFeS@Lignite, among which reduction played a major role. The characterization results showed that Fe2+, S2-, and Cr(VI) were converted to FeOOH, S8, SO42-, Fe2O3, Cr2O3, and Fe(III)-Cr(III) complexes. This research demonstrates that nFeS@Lignite is a good adsorbent with promising potential for application in the remediation of heavy metal-contaminated wastewater.
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Affiliation(s)
- Saiou Fu
- College of Civil Engineering, Liaoning Technical University, Fuxin, 123000, China
| | - Junzhen Di
- College of Civil Engineering, Liaoning Technical University, Fuxin, 123000, China.
| | - Xuying Guo
- College of Science, 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
| | - Hanzhe Li
- College of Civil Engineering, Liaoning Technical University, Fuxin, 123000, China
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Jmai S, Guiza S, Jellali S, Bagane M, Jeguirim M. Competitive bio-sorption of basic dyes onto petiole palm tree wastes in single and binary systems. CR CHIM 2022. [DOI: 10.5802/crchim.155] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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9
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Haddad K, Hantous A, Chagtmi R, Khedhira H, Chaden C, Ben Hassen Trabelsi A. Industrial dye removal from tannery wastewater by using biochar produced from tannery fleshing waste: a road to circular economy. CR CHIM 2022. [DOI: 10.5802/crchim.148] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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10
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Conversion of Industrial Sludge into Activated Biochar for Effective Cationic Dye Removal: Characterization and Adsorption Properties Assessment. WATER 2022. [DOI: 10.3390/w14142206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
This paper presents an in-depth characterization of a raw industrial sludge (IS-R) and its KOH-activated biochar pyrolyzed at 750 °C (IS-KOH-B) followed by their application to remove a cationic dye from aqueous solution. Materials characterization shows that compared to the IS-R, the IS-KOH-B has improved structural, textural, and surface chemical properties. In particular, the IS-KOH-B’s BET surface area and total pore volume are about 78 and 6 times higher than those found for the IS-R, respectively. The activated biochar efficiently retained the cationic dye under wide experimental conditions. Indeed, for an initial dye concentration of 50 mg L−1, removal yields were assessed to be more than 92.5%, 93.5%, and 97.8% for a large pH range (4–10), in the presence of high contents of competing cations (3000 mg L−1 of Ca2+, Mg2+, Na+, and K+), and a low used adsorbent dose (1 g L−1), respectively. The Langmuir’s adsorption capacities were 48.5 and 65.9 mg g−1 for of IS-R and IS-KOH-B, respectively, which are higher than those reported for various adsorbents in the literature. The dye removal was found to be monolayer, spontaneous, and endothermic for both the adsorbents. Moreover, this removal process seems to be controlled by chemical reactions for IS-KOH-B whereas by both physico–chemical reactions for IS-R. This study demonstrates that the raw industrial sludge and especially its KOH-activated derived biochar could be considered as promising adsorbents for the removal of dyes from aqueous solutions.
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Bakhtiari S, Shahrashoub M, Keyhanpour A. A comprehensive study on single and competitive adsorption-desorption of copper and cadmium using eco-friendly magnetite (Fe3O4) nanoparticles. KOREAN J CHEM ENG 2022. [DOI: 10.1007/s11814-022-1148-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Yang P, Li F, Wang B, Niu Y, Wei J, Yu Q. In Situ Synthesis of Carbon Nanotube–Steel Slag Composite for Pb(II) and Cu(II) Removal from Aqueous Solution. NANOMATERIALS 2022; 12:nano12071199. [PMID: 35407318 PMCID: PMC9000475 DOI: 10.3390/nano12071199] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 03/31/2022] [Accepted: 04/01/2022] [Indexed: 02/07/2023]
Abstract
Methods and materials that effectively remove heavy metals, such as lead and copper, from wastewater are urgently needed. In this study, steel slag, a low-cost byproduct of steel manufacturing, was utilized as a substrate material for carbon nanotube (CNT) growth by chemical vapor deposition (CVD) to produce a new kind of efficient and low-cost absorbent without any pretreatment. The synthesis parameters of the developed CNT–steel slag composite (SS@CNTs) were optimized, and its adsorption capacities for Pb(II) and Cu(II) were evaluated. The results showed that the optimal growth time, synthesis temperature and acetylene flow rate were 45 min, 600 °C and 200 sccm (standard cubic centimeter per minute), respectively. The SS@CNTs composite had a high adsorption capacity with a maximum removal amount of 427.26 mg·g−1 for Pb(II) and 132.79 mg·g−1 for Cu(II). The adsorption proceeded rapidly during the first 15 min of adsorption and reached equilibrium at approximately 90 min. The adsorption processes were in accordance with the isotherms of the Langmuir model and the pseudo-second-order model, while the adsorption thermodynamics results indicated that the removal for both metals was an endothermic and spontaneous process. This study showed that compared with other adsorbent materials, the SS@CNTs composite is an efficient and low-cost adsorbent for heavy metals such as lead and copper.
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Affiliation(s)
- Pengfei Yang
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China; (P.Y.); (B.W.); (J.W.)
| | - Fangxian Li
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China; (P.Y.); (B.W.); (J.W.)
- Guangdong Low Carbon Technology and Engineering Center for Building Materials, Guangzhou 510641, China
- Correspondence: (F.L.); (Q.Y.)
| | - Beihan Wang
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China; (P.Y.); (B.W.); (J.W.)
| | - Yanfei Niu
- School of Civil Engineering, Guangzhou University, Guangzhou 510006, China;
| | - Jiangxiong Wei
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China; (P.Y.); (B.W.); (J.W.)
- Guangdong Low Carbon Technology and Engineering Center for Building Materials, Guangzhou 510641, China
| | - Qijun Yu
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China; (P.Y.); (B.W.); (J.W.)
- Guangdong Low Carbon Technology and Engineering Center for Building Materials, Guangzhou 510641, China
- Correspondence: (F.L.); (Q.Y.)
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Di J, Ruan Z, Zhang S, Dong Y, Fu S, Li H, Jiang G. Adsorption behaviors and mechanisms of Cu2+, Zn2+ and Pb2+ by magnetically modified lignite. Sci Rep 2022; 12:1394. [PMID: 35082363 PMCID: PMC8792054 DOI: 10.1038/s41598-022-05453-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Accepted: 01/07/2022] [Indexed: 01/22/2023] Open
Abstract
The study aims to solve the problems of limited capacity and difficult recovery of lignite to adsort Cu2+, Zn2+ and Pb2+ in acid mine wastewater (AMD). Magnetically modified lignite (MML) was prepared by the chemical co-precipitation method. Static beaker experiments and dynamic continuous column experiments were set up to explore the adsorption properties of Cu2+, Zn2+ and Pb2+ by lignite and MML. Lignite and MML before and after the adsorption of heavy metal ions were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and Fourier transform infrared spectrometer (FTIR). Meanwhile, the adsorption mechanisms of Cu2+, Zn2+ and Pb2+ by lignite and MML were revealed by combining the adsorption isotherm model and the adsorption kinetics model. The results showed that the pH, adsorbent dosage, temperature, initial concentration of heavy metal ions, and contact time had an influence on the adsorption of Cu2+, Zn2+ and Pb2+ by lignite and MML, and the adsorption processes were more in line with the Langmuir model. The adsorption kinetics experiments showed that the adsorption processes were jointly controlled by multiple adsorption stages. The adsorption of heavy metal ions by lignite obeyed the Quasi first-order kinetic model, while the adsorption of MML was chemisorption that obeyed the Quasi second-order kinetic model. The negative ΔG and positive ΔH of Cu2+ and Zn2+ indicated the spontaneous and endothermic nature reaction, while the negative ΔH of Pb2+ indicated the exothermic nature reaction. The dynamic continuous column experiments showed that the average removal rates of Cu2+, Zn2+ and Pb2+ by lignite were 78.00, 76.97 and 78.65%, respectively, and those of heavy metal ions by MML were 82.83, 81.57 and 83.50%, respectively. Compared with lignite, the adsorption effect of MML was better. As shown by SEM, XRD and FTIR tests, Fe3O4 was successfully loaded on the surface of lignite during the magnetic modification, which made the surface morphology of lignite coarser. Lignite and MML removed Cu2+, Zn2+ and Pb2+ from AMD in different forms. In addition, the adsorption process of MML is related to the O–H stretching vibration of carboxylic acid ions and the Fe–O stretching vibration of Fe3O4 particles.
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Guo X, Gao X, Fu S, Jiang G, Dong Y, Hu Z. Dynamic experiment on the treatment of acidic chromium-containing wastewater by lignite loaded nano FeS. RSC Adv 2022; 12:6054-6062. [PMID: 35424544 PMCID: PMC8981565 DOI: 10.1039/d1ra08892k] [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: 12/07/2021] [Accepted: 02/14/2022] [Indexed: 11/24/2022] Open
Abstract
In terms of the problem of severe pollution to the ecological environment caused by the acidic chrome-containing wastewater produced in the tanning, electroplating, metallurgy, printing and dyeing and other industries, based on the good adsorbability, reducibility and other properties of heavy metals such as Cr(vi) by lignite and nano FeS, the lignite-loaded nano FeS adsorbing material (nFeS-lignite) was prepared by ultrasonic precipitation method. NFeS-lignite and lignite were used as fillers to construct 1# and 2# dynamic columns to carry out the dynamic treatment experiment of acidic chrome-containing wastewater. And nFeS-lignite and lignite were characterized by XRD, SEM and EDS to explore the regularity, long-acting properties and removal mechanism of acidic chrome-containing wastewater treated by NFeS-lignite and lignite. The results indicate that: ① during 25 days of operation, the average removal percentages of Cr(vi) in the 1# and 2# dynamic columns are 71.6% and 53.1%. The average removal percentages of total chromium in 1# and 2# dynamic columns are 54.4% and 28.8%, and the average effluent pH of 1# and 2# dynamic columns is 5.3 and 7.3. ② According to XRD, SEM, EDS and FTIR analysis, the reducing groups in the structure of nFeS-lignite, such as –CH3, –CH2, C–O and Ar-OH, participate in the reaction and are oxidized to C
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C, CO and other groups. A large number of sediment crystals appeared on the particle surface, and new diffraction peaks such as FeOOH, Cr(OH)3 and Cr2S3 appeared at the same time, indicating that after Cr(vi) was reduced to Cr(iii), it would be fixed on the surface of nFeS-lignite in the form of precipitation such as hydroxide and sulfide. Based on the good adsorption and reducibility of Cr(vi) of lignite and nano-FeS, the lignite supported nano-FeS adsorption material (nFeS-lignite) was prepared by ultrasonic precipitation method to treat acidic chromium-containing wastewater.![]()
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Affiliation(s)
- Xuying Guo
- College of Mining, Liaoning Technical University, Fuxin 123000, Liaoning, China
- College of Science, Liaoning Technical University, Fuxin 123000, Liaoning, China
| | - Xinle Gao
- College of Mining, Liaoning Technical University, Fuxin 123000, Liaoning, China
| | - Saiou Fu
- College of Civil Engineering, Liaoning Technical University, Fuxin 123000, Liaoning, China
| | - Guoliang Jiang
- College of Civil Engineering, Liaoning Technical University, Fuxin 123000, Liaoning, China
| | - Yanrong Dong
- College of Civil Engineering, Liaoning Technical University, Fuxin 123000, Liaoning, China
| | - Zhiyong Hu
- College of Mining, Liaoning Technical University, Fuxin 123000, Liaoning, China
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Choi H, Kim T, Kim SY. Poly (Amidehydrazide) Hydrogel Particles for Removal of Cu 2+ and Cd 2+ Ions from Water. Gels 2021; 7:121. [PMID: 34449598 PMCID: PMC8395747 DOI: 10.3390/gels7030121] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 08/09/2021] [Accepted: 08/10/2021] [Indexed: 12/04/2022] Open
Abstract
Poly(amidoamine)s (PAMAM) are very effective in the removal of heavy metal ions from water due to their abundant amine and amide functional groups, which have a high binding ability to heavy metal ions. We synthesized a new class of hyperbranched poly(amidehydrazide) (PAMH) hydrogel particles from dihydrazides and N,N'-methylenebisacrylamide (MBA) monomer by using the A2 + B4 polycondensation reaction in an inverse suspension polymerization process. In Cd2+ and Cu2+ ion sorption tests, the synthesized dihydrazide-based PAMH hydrogel particles exhibited sorption capacities of 85 mg/g for copper and 47 mg/g for cadmium. Interestingly, the PAMH showed only a 10% decrease in sorption ability in an acidic condition (pH = 4) compared to the diamine-based hyperbranched PAMAM, which showed a ~90% decrease in sorption ability at pH of 4. In addition, PAMH hydrogel particles remove trace amounts of copper (0.67 ppm) and cadmium (0.5 ppm) in water, below the detection limit.
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Affiliation(s)
| | | | - Sang Youl Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea; (H.C.); (T.K.)
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Abstract
This Special Issue includes investigations related to wastewater treatment, recovery, and reuse [...]
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