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Selectivity of the adsorption process of modified zeolite rock with hexadecyl trimethylammonium bromide in front to chromates and dichromates. Salgado G, N. Abstract Abstract. The zeolite materials were characterized by scanning electron microscopy and X-ray diffraction. The surface area was also determined. The experiments were performed in a batch system, the influence of ph, contact time between phases were investigated and during the adsorption process was calculated the concentration of chromium ion present in aqueous solution CrO 4 2- , Cr 2 O 7 The quantification of chromium removed from the aqueous solution by atomic absorption spectrometry technique was done.
In order to understand the behaviour of the adsorption kinetics the pseudo first and pseudo second order models were applied, and to determine the adsorption capacity of the zeolite materials for Cr the Langmuir, Freundlich and Langmuir-Freundlich models were chosen.
It was found that the removal efficiency of chromium ion is influenced by ph and the chemical species present: chromate or dichromate. The chromate and dichromate sorption kinetic data were best fitted to the pseudo-second and pseudo-first order models, respectively; and the Langmuir and Langmuir-Freundlich models described adequately the isotherms data considering a mono component system.
In this case the Langmuir-Freundlich model described the adsorption isotherm behavior. Selectividad del proceso de adsorcion de roca zeolitica modificada con bromuro de hexadeciltrimetilamonio frente a cromatos y dicromatos. Country of publication. Descriptors DEI. Descriptors DEC. Publication Year Publication Year. Language Language. Reference Number Reference Number. Choose fields to export.
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Boulevard Enrique Reyna Hermosillo , C. Received September 5, Accepted April 4, In this work, ordered mesoporous silica MCM was prepared by hydrothermal synthesis using industrial-grade sodium silicate Na 2 SiO 3 as silica source, hexadecyltrimethyl-ammonium bromide CTAB as template agent and ethyl acetate as pH regulator. Since the discovery of ordered mesoporous silica materials [1, 2], different works for the preparation of this kind of materials using cationic surfactants as a template have been published .
Bromuro de hexadeciltrimetilamonio / Bromuro de cetiltrimetilamonio CAS 57-09-0
Isolation and purification of polyribosyl ribitol phosphate from Haemophilus influenzae type b. Procedure for isolating and purifying immunologically active polyribosylribitol phosphate. JPSB2 en. ARA1 en. AUB2 en. BEA en.
Cetyltrimethylammoniumbromid CTAB bzw. Toggle navigation. Property Value dbo: abstract El Bromuro de hexadeciltrimetilamonio o Bromuro de cetiltrimetilamonio C16H33 N CH3 3Br es una sal de amonio cuaternario, uno de cuyos grupos alquilo es de gran longitud, con actividad detergente. It is one of the components of the topical antiseptic cetrimide. The cetrimonium hexadecyltrimethylammonium cation is an effective antiseptic agent against bacteria and fungi. It is also one of the main components of the buffer for the extraction of DNA.