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Goyal S, Jacob J. 2,2′‐Bipyridine containing chelating polymers for sequestration of heavy metal ions from organic solvents. J Appl Polym Sci 2022. [DOI: 10.1002/app.52121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Shivani Goyal
- Department of Materials Science and Engineering Indian Institute of Technology Delhi New Delhi India
| | - Josemon Jacob
- Department of Materials Science and Engineering Indian Institute of Technology Delhi New Delhi India
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Kuroki V, Bosco GE, Fadini PS, Mozeto AA, Cestari AR, Carvalho WA. Use of a La(III)-modified bentonite for effective phosphate removal from aqueous media. JOURNAL OF HAZARDOUS MATERIALS 2014; 274:124-131. [PMID: 24769849 DOI: 10.1016/j.jhazmat.2014.03.023] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Revised: 03/07/2014] [Accepted: 03/08/2014] [Indexed: 06/03/2023]
Abstract
A bentonite from the Northeast Brazilian region was modified with lanthanum (NT-25La) using an ion exchange process. Lanthanum incorporation in the natural clay, as well as the properties of the clay materials, were confirmed by X-ray diffraction, X-ray fluorescence, specific surface area and scanning electron microscopy (SEM/EDX). Phosphate adsorption equilibrium and kinetic tests were performed at different temperatures. The adsorption data have shown that NT-25La reaches equilibrium between modified clay and phosphate solution within 60 min of contact. The phosphate retention at room temperature reached 95%, when initial phosphate concentration in solution was 5 mg L(-1). A kinetic-order variable model provided satisfactory fitting of the kinetic data. Adsorption of phosphate was best described by a Langmuir isotherm, with maximum phosphate sorption capacity of 14.0 mg g(-1). Two distinct adsorption mechanisms were observed that may influence the adsorption processes. The investigation pointed out that the phosphate adsorption occurs via physisorption processes and that the use of NT-25La provides a maximum phosphate sorption capacity higher than many commercial adsorbents.
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Affiliation(s)
- Vivian Kuroki
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Rua Santa Adélia, 166, Santo André CEP 09210-170, SP, Brazil
| | - Giulianna E Bosco
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Rua Santa Adélia, 166, Santo André CEP 09210-170, SP, Brazil
| | - Pedro S Fadini
- Laboratório de Biogeoquímica Ambiental, Núcleo de Estudos, Diagnósticos e Intervenções Ambientais, Departamento de Química, Universidade Federal de São Carlos, Cx. Postal 676, São Carlos CEP 13565-905, SP, Brazil
| | - Antonio A Mozeto
- Laboratório de Biogeoquímica Ambiental, Núcleo de Estudos, Diagnósticos e Intervenções Ambientais, Departamento de Química, Universidade Federal de São Carlos, Cx. Postal 676, São Carlos CEP 13565-905, SP, Brazil
| | - Antonio R Cestari
- Department of Chemistry/CCET, Universidade Federal de Sergipe, São Cristóvão CEP 49100-000, SE, Brazil
| | - Wagner A Carvalho
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Rua Santa Adélia, 166, Santo André CEP 09210-170, SP, Brazil.
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Rao K, Anand S, Venkateswarlu P. Psidium guvajava L Leaf Powder — A Potential Low-cost Biosorbent for the Removal of Cadmium(II) Ions from Wastewater. ADSORPT SCI TECHNOL 2010. [DOI: 10.1260/0263-6174.28.2.163] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Affiliation(s)
- K.S. Rao
- Institute of Minerals and Materials Technology, Bhubaneswar 751 013, India
| | - S. Anand
- Institute of Minerals and Materials Technology, Bhubaneswar 751 013, India
| | - P. Venkateswarlu
- Department of Chemical Engineering, College of Engineering, Andhra University, Visakhapatnam 530003, Andhra Pradesh, India
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