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Correa-Abril J, Stahl U, Cabrera EV, Parra YJ, Vega MA, Taamalli S, Louis F, Rodríguez-Díaz JM. Adsorption dynamics of Cd 2+(aq) on microwave-synthetized pristine biochar from cocoa pod husk: Green, experimental, and DFT approaches. iScience 2024; 27:109958. [PMID: 38840843 PMCID: PMC11152673 DOI: 10.1016/j.isci.2024.109958] [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: 01/15/2024] [Revised: 04/05/2024] [Accepted: 05/08/2024] [Indexed: 06/07/2024] Open
Abstract
Biochar obtained via microwave-assisted pyrolysis (MAP) at 720 W and 15 min from cocoa pod husk (CPH) is an efficient adsorbent of Cd2+(aq). Biochar of residual biomass of CPH (BCCPH) possesses favorable physicochemical and morphological properties, featuring a modest surface area yet a suitable porous structure. Adsorption, predominantly governed by physisorption, is influenced by the oxygen-containing active sites (-COOR, -C(R)O, and -CH2OR; R = H, alkyl). CdCO3 formation occurs during adsorption. Experimental data were well-fitted into various kinetic models for a broad understanding of the sorption process. Langmuir model indicates a maximum adsorption capacity of 14.694 mg/g. The thermodynamic study confirms the spontaneous and endothermic sorption. Studies at the molecular level have revealed that the Cd2+ ion tends to bind to surface aromatic carbon atoms. This sustainable approach produces BCCPH via MAP as a solution for waste transformation into water-cleaning materials.
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Affiliation(s)
- Jhonny Correa-Abril
- Universidad Central del Ecuador, Facultad de Ingeniería Química, Grupo de Investigación en Moléculas y Materiales Funcionales (MoléMater), Enrique Ritter s/n y Bolivia, Quito, Pichincha 170521, Ecuador
- Facultad de Posgrado, Universidad Técnica de Manabí, Av. Urbina y Che Guevara, Portoviejo, Manabí 130104, Ecuador
| | - Ullrich Stahl
- Universidad Central del Ecuador, Facultad de Ingeniería Química, Grupo de Investigación en Moléculas y Materiales Funcionales (MoléMater), Enrique Ritter s/n y Bolivia, Quito, Pichincha 170521, Ecuador
| | - Elvia V. Cabrera
- Universidad Central del Ecuador, Facultad de Ingeniería Química, Grupo de Investigación en Moléculas y Materiales Funcionales (MoléMater), Enrique Ritter s/n y Bolivia, Quito, Pichincha 170521, Ecuador
| | - Yonathan J. Parra
- Universidad Central del Ecuador, Facultad de Ingeniería en Geología, Minas, Petróleos y Ambiental, Grupo de Investigación en Moléculas y Materiales Funcionales (MoléMater), Jerónimo Leyton y Gilberto Gatto Sobral, Quito, Pichincha 170521, Ecuador
| | - Michael A. Vega
- Universidad Central del Ecuador, Facultad de Ingeniería Química, Grupo de Investigación en Moléculas y Materiales Funcionales (MoléMater), Enrique Ritter s/n y Bolivia, Quito, Pichincha 170521, Ecuador
- Universidad Central del Ecuador, Facultad de Ingeniería en Geología, Minas, Petróleos y Ambiental, Grupo de Investigación en Moléculas y Materiales Funcionales (MoléMater), Jerónimo Leyton y Gilberto Gatto Sobral, Quito, Pichincha 170521, Ecuador
| | - Sonia Taamalli
- Université de Lille, CNRS, UMR 8522, PhysicoChimie des Processus de Combustion et de l’Atmosphère – PC2A, 59000 Lille, France
| | - Florent Louis
- Université de Lille, CNRS, UMR 8522, PhysicoChimie des Processus de Combustion et de l’Atmosphère – PC2A, 59000 Lille, France
| | - Joan Manuel Rodríguez-Díaz
- Laboratorio de Análisis Químicos y Biotecnológicos, Instituto de Investigación, Universidad Técnica de Manabí, Av. Urbina y Che Guevara, Portoviejo, Manabí 130104, Ecuador
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Gao M, Ling N, Tian H, Guo C, Wang Q. Toxicity, physiological response, and biosorption mechanism of Dunaliella salina to copper, lead, and cadmium. Front Microbiol 2024; 15:1374275. [PMID: 38605709 PMCID: PMC11007151 DOI: 10.3389/fmicb.2024.1374275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2024] [Accepted: 03/11/2024] [Indexed: 04/13/2024] Open
Abstract
Background Heavy metal pollution has become a global problem, which urgently needed to be solved owing to its severe threat to water ecosystems and human health. Thus, the exploration and development of a simple, cost-effective and environmental-friendly technique to remove metal elements from contaminated water is of great importance. Algae are a kind of photosynthetic autotroph and exhibit excellent bioadsorption capacities, making them suitable for wastewater treatment. Methods The effects of heavy metals (copper, lead and cadmium) on the growth, biomolecules accumulation, metabolic responses and antioxidant response of Dunaliella salina were investigated. Moreover, the Box-Behnken design (BBD) in response surface methodology (RSM) was used to optimize the biosorption capacity, and FT-IR was performed to explore the biosorption mechanism of D. salina on multiple heavy metals. Results The growth of D. salina cells was significantly inhibited and the contents of intracellular photosynthetic pigments, polysaccharides and proteins were obviously reduced under different concentrations of Cu2+, Pb2+ and Cd2+, and the EC50 values were 18.14 mg/L, 160.37 mg/L and 3.32 mg/L at 72 h, respectively. Besides, the activities of antioxidant enzyme SOD and CAT in D. salina first increased, and then descended with increasing concentration of three metal ions, while MDA contents elevated continuously. Moreover, D. salina exhibited an excellent removal efficacy on three heavy metals. BBD assay revealed that the maximal removal rates for Cu2+, Pb2+, and Cd2+ were 88.9%, 87.2% and 72.9%, respectively under optimal adsorption conditions of pH 5-6, temperature 20-30°C, and adsorption time 6 h. Both surface biosorption and intracellular bioaccumulation mechanisms are involved in metal ions removal of D. salina. FT-IR spectrum exhibited the main functional groups including carboxyl (-COOH), hydroxyl (-OH), amino (-NH2), phosphate (-P=O) and sulfate (-S=O) are closely associated with the biosorption or removal of heavy metalsions. Discussion Attributing to the brilliant biosorption capacity, Dunaliella salina may be developed to be an excellent adsorbent for heavy metals.
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Affiliation(s)
- Mingze Gao
- Pharmaceutical Engineering Technology Research Center, Harbin University of Commerce, Harbin, China
- Engineering Research Center for Natural Antitumor Drugs, Ministry of Education, Harbin, China
| | - Na Ling
- Pharmaceutical Engineering Technology Research Center, Harbin University of Commerce, Harbin, China
- Engineering Research Center for Natural Antitumor Drugs, Ministry of Education, Harbin, China
| | - Haiyan Tian
- Pharmaceutical Engineering Technology Research Center, Harbin University of Commerce, Harbin, China
- Engineering Research Center for Natural Antitumor Drugs, Ministry of Education, Harbin, China
| | - Chunqiu Guo
- Pharmaceutical Engineering Technology Research Center, Harbin University of Commerce, Harbin, China
- Engineering Research Center for Natural Antitumor Drugs, Ministry of Education, Harbin, China
| | - Qiyao Wang
- School of Pharmaceutical Sciences, Shandong University, Jinan, China
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Míguez-González A, Cela-Dablanca R, Barreiro A, Rodríguez-López L, Rodríguez-Seijo A, Arias-Estévez M, Núñez-Delgado A, Fernández-Sanjurjo MJ, Castillo-Ramos V, Álvarez-Rodríguez E. Adsorption of antibiotics on bio-adsorbents derived from the forestry and agro-food industries. ENVIRONMENTAL RESEARCH 2023; 233:116360. [PMID: 37295584 DOI: 10.1016/j.envres.2023.116360] [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: 04/04/2023] [Revised: 05/22/2023] [Accepted: 06/07/2023] [Indexed: 06/12/2023]
Abstract
Antibiotic consumption at high levels in both human and veterinary populations pose a risk to their eventual entry into the food chain and/or water bodies, which will adversely affect the health of living organisms. In this work, three materials from forestry and agro-food industries (pine bark, oak ash and mussel shell) were investigated as regards their potential use as bio-adsorbents in the retention of the antibiotics amoxicillin (AMX), ciprofloxacin (CIP) and trimethoprim (TMP). Batch adsorption/desorption tests were conducted, adding increasing concentrations of the pharmaceuticals individually (from 25 to 600 μmol L-1), reaching maximum adsorption capacities of ≈ 12000 μmol kg-1 for the three antibiotics, with removal percentages of ≈ 100% for CIP, 98-99% adsorption for TMP onto pine bark, and 98-100% adsorption for AMX onto oak ash. The presence of high calcium contents and alkaline conditions in the ash favored the formation of cationic bridges with AMX, whereas the predominance of hydrogen bonds between pine bark and TMP and CIP functional groups explain the strong affinity and retention of these antibiotics. The Freundlich's model provided the best prediction for AMX adsorption onto oak ash and mussel shell (heterogeneous adsorption), whereas the Langmuir's model described well AMX adsorption onto pine bark, as well as CIP adsorption onto oak ash (homogeneous and monolayer adsorption), while all three models provided satisfactory results for TMP. In the present study, the results obtained were crucial in terms of valorization of these adsorbents and their subsequent use to improve the retention of antibiotics of emerging concern in soils, thereby preventing contamination of waters and preserving environment quality.
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Affiliation(s)
- Ainoa Míguez-González
- Department of Soil Science and Agricultural Chemistry, Engineering Polytechnic School, University of Santiago de Compostela, 27002, Lugo, Spain
| | - Raquel Cela-Dablanca
- Department of Soil Science and Agricultural Chemistry, Engineering Polytechnic School, University of Santiago de Compostela, 27002, Lugo, Spain
| | - Ana Barreiro
- Department of Soil Science and Agricultural Chemistry, Engineering Polytechnic School, University of Santiago de Compostela, 27002, Lugo, Spain
| | - Lucia Rodríguez-López
- Soil Science and Agricultural Chemistry, Faculty of Sciences, University of Vigo, 32004, Ourense, Spain
| | - Andrés Rodríguez-Seijo
- Soil Science and Agricultural Chemistry, Faculty of Sciences, University of Vigo, 32004, Ourense, Spain
| | - Manuel Arias-Estévez
- Soil Science and Agricultural Chemistry, Faculty of Sciences, University of Vigo, 32004, Ourense, Spain
| | - Avelino Núñez-Delgado
- Department of Soil Science and Agricultural Chemistry, Engineering Polytechnic School, University of Santiago de Compostela, 27002, Lugo, Spain
| | - María J Fernández-Sanjurjo
- Department of Soil Science and Agricultural Chemistry, Engineering Polytechnic School, University of Santiago de Compostela, 27002, Lugo, Spain
| | - Ventura Castillo-Ramos
- Department of Inorganic Chemistry, Faculty of Science, University of Granada, 18071, Granada, Spain.
| | - Esperanza Álvarez-Rodríguez
- Department of Soil Science and Agricultural Chemistry, Engineering Polytechnic School, University of Santiago de Compostela, 27002, Lugo, Spain
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