Green composites based on magnetic N-doped carbons: Synergetic effect on the simultaneous adsorption of emerging contaminants from water

Author(s)

da Silva, Paula Mayara Morais ; Camparotto, Natalia Gabriele ; Neves, Tauany de Figueiredo ; Carrara, Alan Sambugari ; Mastelaro, Valmor Roberto ; Oliveira, Rafael L. ; Prediger, Patricia

• Document type: Journal article
• Source: JOURNAL OF WATER PROCESS ENGINEERING; v. 58, p. 14-pg., 2024-01-31.

Abstract

This work deals with the removal of emerging contaminants from water by green composites based on mesoporous carbons obtained from glucosamine or a mixture of sucrose and cyanamide, green iron nanoparticles prepared from water hyacinth waste from sewage treatment plants, and proanthocyanidins as natural crosslinking agent. The composites were characterized and applied in dye adsorption of malachite green (MG), crystal violet (CV), methyl orange, and safranin, and the pharmaceutical drugs atenolol (ATN) and sodium diclofenac (SD). The removal of MG and CV was studied in detail, and the maximum adsorption capacity was 713.26 and 606.79 mg center dot g- 1, respectively. The experimental data best fit to the pseudo-second-order kinetic model for both dyes. The material exhibited an excellent synergistic effect in the uptake of ATN and SD in the presence of MG, increasing the adsorption rate by in 57 % and 404 %, respectively, compared to the pharmaceutical drugs treated individually. The composite removed 91 and 98 % of MG and CV dyes from a river water sample, even in the presence of interferences (salts and organic matter). Also, the composite could be applied in 7 cycles of reuse, up to 70 % of recycling efficiency. The electrostatic and pi - pi interactions and hydrogen bonding were identified as the mechanisms of adsorption. (AU)

• FAPESP's process: 23/02041-8 - Preparation of MOF-based polymeric membranes containing niobium by rotary jet-spun and its application in the removal of contaminants in water
• Grantee: Natália Gabriele Camparotto
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
• Grantee: Elson Longo da Silva
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
• FAPESP's process: 22/14834-0 - Synthesis of new nanoadsorbents, their characterizations and applications in pollutant adsorption in water
• Grantee: PATRICIA PREDIGER
• Support Opportunities: Regular Research Grants
• FAPESP's process: 19/25228-0 - Development of new membranes based on graphene oxide for the removal of contaminants in water
• Grantee: Tauany de Figueiredo Neves
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
• FAPESP's process: 22/09912-1 - Preparation of new hydrogels containing mesoporous carbons from plastic waste and doped with metals: application in the removal of antibiotics from water and toxicological analysis
• Grantee: Paula Mayara Morais da Silva
• Support Opportunities: Scholarships in Brazil - Doctorate