Article (Scientific journals)
Eco-Friendly Polysaccharide-Based Synthesis of Nanostructured MgO: Application in the Removal of Cu2+ in Wastewater.
Balaba, Nayara; Lopes horsth, Dienifer Fernanda; Correa, Jamille de S et al.
2023In Materials, 16 (2), p. 693
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Keywords :
adsorption; copper; drinking water; heavy metals; magnesium oxide; Aloe vera; Cassava starch; Citrus pectin; Eco-friendly; Low-costs; MgO; Nano-structured; Natural polysaccharide; Non-toxic; Synthesis route; Materials Science (all); Condensed Matter Physics; General Materials Science
Abstract :
[en] The present study described three synthesis routes using different natural polysaccharides as low-cost non-toxic fuels and complexing agents for obtaining MgO. Cassava starch, Aloe vera leaves (mainly acemannan) gel, and citric pectin powder were mixed with magnesium nitrate salt and calcined at 750 °C for 2 h. The samples were named according to the polysaccharide: cassava starch (MgO-St), citrus pectin (MgO-CP), and Aloe vera (MgO-Av). X-ray diffraction identified the formation of a monophasic periclase structure (FCC type) for the three samples. The N2 adsorption/desorption isotherms (B.E.T. method) showed an important difference in textural properties, with a higher pore volume (Vmax = 89.76 cc/g) and higher surface area (SA = 43.93 m2/g) obtained for MgO-St, followed by MgO-CP (Vmax = 11.01 cc/g; SA = 7.01 m2/g) and MgO-Av (Vmax = 6.44 cc/g; SA = 6.63 m2/g). These data were consistent with the porous appearance observed in SEM images. Porous solids are interesting as adsorbents for removing metallic and molecular ions from wastewater. The removal of copper ions from water was evaluated, and the experimental data at equilibrium were adjusted according to the Freundlich, Langmuir, and Temkin isotherms. According to the Langmuir model, the maximum adsorption capacity (qmax) was 6331.117, 5831.244, and 6726.623 mg·g-1 for the adsorbents MgO-St, MgO-Av, and MgO-CP, respectively. The results of the adsorption isotherms indicated that the synthesized magnesium oxides could be used to decrease the amount of Cu2+ ions in wastewater.
Disciplines :
Chemistry
Author, co-author :
Balaba, Nayara;  Chemistry Department, Universidade Estadual Do Centro-Oeste, Guarapuava 85040-080, Brazil
Lopes horsth, Dienifer Fernanda  ;  Université de Mons - UMONS > Faculté des Sciences > Service de Chimie des Interactions Plasma-Surface ; Chemistry Department, Universidade Estadual Do Centro-Oeste, Guarapuava 85040-080, Brazil
Correa, Jamille de S ;  Chemistry Department, Universidade Estadual Do Centro-Oeste, Guarapuava 85040-080, Brazil
Primo, Julia de O ;  Chemistry Department, Universidade Estadual Do Centro-Oeste, Guarapuava 85040-080, Brazil
Jaerger, Silvia;  Chemistry Department, Universidade Estadual Do Centro-Oeste, Guarapuava 85040-080, Brazil
Alves, Helton J ;  Laboratório de Materiais e Energias Renováveis, LABMATER/UFPR, Universidade Federal do Paraná-UFPR, Palotina 85950-000, Brazil
Bittencourt, Carla  ;  Université de Mons - UMONS > Faculté des Sciences > Service de Chimie des Interactions Plasma-Surface
Anaissi, Fauze J ;  Chemistry Department, Universidade Estadual Do Centro-Oeste, Guarapuava 85040-080, Brazil
Language :
English
Title :
Eco-Friendly Polysaccharide-Based Synthesis of Nanostructured MgO: Application in the Removal of Cu2+ in Wastewater.
Publication date :
10 January 2023
Journal title :
Materials
ISSN :
1996-1944
eISSN :
1996-1944
Publisher :
MDPI, Switzerland
Volume :
16
Issue :
2
Pages :
693
Peer reviewed :
Peer reviewed
Development Goals :
14. Life below water
Research unit :
S882 - Chimie des Interactions Plasma-Surface
Research institute :
Research Institute for Materials Science and Engineering
Funders :
CAPES
CNPq Productivity
CNPq
Confap-WBI
Funding text :
N.B. appreciates the CAPES (grant number 88887.628497/2021-00) for a graduate scholarship. F.J.A. is thankful for a CNPq Productivity grant (308625/2019-6) and the funding from CNPq (427127/2018-1). C.B. is a research associate of FR-FNRS, Belgium. C.B. and N.B. thank the collaborative grant Confap-WBI.The authors are grateful to the funding agencies CNPq, Capes, Finep, Fundação Araucária, WBI, and FRS-FNRS.
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