Ladder chain Cd-based polymer as a highly effective adsorbent for removal of Congo red.
Ecotoxicol Environ Saf
; 178: 221-229, 2019 Aug 30.
Article
em En
| MEDLINE
| ID: mdl-31015184
ABSTRACT
Developing of high effective and fast-rate adsorbent materials has been recently attracted intensive attentions all over the world due to organic dye polluted water treatment. However, few studies have been reported on the ultrahigh-capacity and fast-rate removal of Congo red. In this work, a new stable Cd-based coordination polymer exhibits excellent adsorption performance towards Congo Red. This ladder chain [Cd4(H2L)4(H2O)8(NDS)]n·3n(NDS) (I) (H2L = N1,N2-bis(pyridin-3-ylmethyl) ethane-1,2-diamine, 1,5-H2NDSâ¯=â¯1,5-naphthalene disulfonic acid) has been successfully synthesized by the hydrothermal reaction. At room temperature, the experimental adsorption capacity of coordination polymer (I) towards Congo red can reach up to 16,880â¯mgâ¯g-1 in 20â¯min (pHâ¯=â¯2.0-3.2), and its higher capacity and faster rate are all better than those in reported inorganic and metal-organic frameworks absorbents. The adsorption process is spontaneous and endothermic reaction, and fits well with the second-order kinetics, Langmuir and Scatchard isotherm adsorption models. The excellent adsorption performance of (I) towards Congo red is related to the strong electrostatic, various hydrogen bonding and π-π stacking interactions under acidic conditions.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Polímeros
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Poluentes Químicos da Água
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Cádmio
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Purificação da Água
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Vermelho Congo
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Corantes
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Complexos de Coordenação
Idioma:
En
Revista:
Ecotoxicol Environ Saf
Ano de publicação:
2019
Tipo de documento:
Article