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On the performance of Sargassum-derived calcium alginate ion exchange resins for Pb2+ adsorption: batch and packed bed applications.
Mohammed, Akeem; Mohammed, Chantal; Mautner, Andreas; Kistow, Matika; Chaitram, Pooran; Bismarck, Alexander; Ward, Keeran.
Afiliação
  • Mohammed A; Department of Chemical Engineering, The University of West Indies St. Augustine, St. Augustine, Trinidad and Tobago.
  • Mohammed C; Department of Chemical Engineering, The University of West Indies St. Augustine, St. Augustine, Trinidad and Tobago.
  • Mautner A; Institute of Environmental Biotechnology, IFA-Tulln, University of Natural Resources and Life Sciences Vienna, Konrad-Lorenz-Str. 20, 3430 Tulln, 1180, Vienna, Austria.
  • Kistow M; Institute of Materials Chemistry and Research, Polymer and Composite Engineering (PaCE) Group, Faculty of Chemistry, University of Vienna, Währinger Straße 42, 1090, Vienna, Austria.
  • Chaitram P; Department of Chemical Engineering, The University of West Indies St. Augustine, St. Augustine, Trinidad and Tobago.
  • Bismarck A; Department of Chemical Engineering, The University of West Indies St. Augustine, St. Augustine, Trinidad and Tobago.
  • Ward K; Institute of Materials Chemistry and Research, Polymer and Composite Engineering (PaCE) Group, Faculty of Chemistry, University of Vienna, Währinger Straße 42, 1090, Vienna, Austria.
Environ Sci Pollut Res Int ; 31(21): 31224-31239, 2024 May.
Article em En | MEDLINE | ID: mdl-38632197
ABSTRACT
Driven by climate change and human activity, Sargassum blooming rates have intensified, producing copious amount of the invasive, pelagic seaweed across the Caribbean and Latin America. Battery recycling and lead-smelter wastes have heavily polluted the environment and resulted in acute lead poisoning in children through widespread heavy metal contamination particular in East Trinidad. Our study details a comprehensive investigation into the use of Sargassum (S. natans), as a potential resource-circular feedstock for the synthesis of calcium alginate beads utilized in heavy metal adsorption, both in batch and column experiments. Here, ionic cross-linking of extracted sodium alginate with calcium chloride was utilized to create functional ion-exchange beads. Given the low quality of alginates extracted from Sargassum which produce poor morphological beads, composite beads in conjunction with graphene oxide and acrylamide were used to improve fabrication. Stand-alone calcium alginate beads exhibited superior Pb2+ adsorption, with a capacity of 213 mg g-1 at 20 °C and pH 3.5, surpassing composite and commercial resins. Additives like acrylamide and graphene oxide in composite alginate resins led to a 21-40% decrease in Pb2+ adsorption due to reduced active sites. Column operations confirmed Alginate systems' practicality, with 20-24% longer operating times, 15 times lower adsorbent mass on scale-up and 206% smaller column diameters compared to commercial counterparts. Ultimately, this study advocates for Sargassum-based Alginate ion-exchange beads as a bio-based alternative in Trinidad and developing nations for dealing with heavy metal ion waste, offering superior heavy metal adsorption performance and supporting resource circularity.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Sargassum / Alginatos / Resinas de Troca Iônica / Chumbo Idioma: En Revista: Environ Sci Pollut Res Int Assunto da revista: SAUDE AMBIENTAL / TOXICOLOGIA Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Trinidad e Tobago País de publicação: Alemanha
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Sargassum / Alginatos / Resinas de Troca Iônica / Chumbo Idioma: En Revista: Environ Sci Pollut Res Int Assunto da revista: SAUDE AMBIENTAL / TOXICOLOGIA Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Trinidad e Tobago País de publicação: Alemanha