Ammonium-functionalized mesoporous silica MCM-41 for phosphate removal from aqueous solutions

Jin Kyu Kang, Jae Hyun Kim, Song Bae Kim, Sang-Hyup Lee, Jae Woo Choi, Chang Gu Lee

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The aim of this study was to investigate the removal of phosphate (P) using ammonium-functionalized MCM-41 (A-MCM-41). Batch experiments were performed with A-MCM-41 under various conditions including the adsorbent dose, reaction time, initial P concentration, and solution pH. The results showed that the phosphate removal in the MCM-41 (initial P conc. = 2 mgP L 1) was negligible with the percent removal of ≤1.0% at the adsorbent dosages between 0.5 and 2.0 g L 1. In the case of A-MCM-41, the percent removal increased from 73.6 to 100% as the adsorbent dose increased from 0.5 to 2.0 g L 1. This indicated an enhancement of the phosphate removal due to the surface modification of the MCM-41 through the functionalization of the ammonium group (NH3 +). The results also demonstrated that the phosphate removal by the MCM-41 was minimal throughout the acidic and alkaline pH conditions (3.1% at pH 3.5; ≤1.0% at pH 5.4–10.7), whereas the phosphate removal by the A-MCM-41 was effective throughout the acidic and neutral pH values (94.7–97.6% at pH 3.5–7.4). In highly alkaline conditions, however, the phosphate removal by the A-MCM-41 was greatly reduced (3.4% at pH 10.7) due to the competition of the hydroxyl groups (OH) with phosphate ions for sorption sites. The results indicated that the pseudo-second-order model was most suitable for describing the kinetic data with the parameter values of qe = 1.86 mgP g 1 and k2 = 183.98 g mgP 1 h 1. The Redlich–Peterson isotherm fits well with the equilibrium data, with the parameter values of KR/aR = 7.90 mgP g 1 and g = 0.83.

Original languageEnglish
Pages (from-to)10839-10849
Number of pages11
JournalDesalination and Water Treatment
Volume57
Issue number23
DOIs
Publication statusPublished - 2016 May 14

Fingerprint

Multicarrier modulation
Phosphates
ammonium
aqueous solution
silica
Silica
Adsorbents
phosphate
phosphate removal
isotherm
sorption
Isotherms
Surface treatment
Sorption
kinetics
ion
Kinetics
removal
Ions
experiment

Keywords

  • MCM-41
  • Mesoporous silica
  • Phosphate
  • Sorption
  • Surface functionalization

ASJC Scopus subject areas

  • Pollution
  • Water Science and Technology
  • Ocean Engineering

Cite this

Ammonium-functionalized mesoporous silica MCM-41 for phosphate removal from aqueous solutions. / Kang, Jin Kyu; Kim, Jae Hyun; Kim, Song Bae; Lee, Sang-Hyup; Choi, Jae Woo; Lee, Chang Gu.

In: Desalination and Water Treatment, Vol. 57, No. 23, 14.05.2016, p. 10839-10849.

Research output: Contribution to journalArticle

Kang, Jin Kyu ; Kim, Jae Hyun ; Kim, Song Bae ; Lee, Sang-Hyup ; Choi, Jae Woo ; Lee, Chang Gu. / Ammonium-functionalized mesoporous silica MCM-41 for phosphate removal from aqueous solutions. In: Desalination and Water Treatment. 2016 ; Vol. 57, No. 23. pp. 10839-10849.
@article{4fdb54fbc80843618ad8b5bf31ef13ba,
title = "Ammonium-functionalized mesoporous silica MCM-41 for phosphate removal from aqueous solutions",
abstract = "The aim of this study was to investigate the removal of phosphate (P) using ammonium-functionalized MCM-41 (A-MCM-41). Batch experiments were performed with A-MCM-41 under various conditions including the adsorbent dose, reaction time, initial P concentration, and solution pH. The results showed that the phosphate removal in the MCM-41 (initial P conc. = 2 mgP L− 1) was negligible with the percent removal of ≤1.0{\%} at the adsorbent dosages between 0.5 and 2.0 g L− 1. In the case of A-MCM-41, the percent removal increased from 73.6 to 100{\%} as the adsorbent dose increased from 0.5 to 2.0 g L− 1. This indicated an enhancement of the phosphate removal due to the surface modification of the MCM-41 through the functionalization of the ammonium group (NH3 +). The results also demonstrated that the phosphate removal by the MCM-41 was minimal throughout the acidic and alkaline pH conditions (3.1{\%} at pH 3.5; ≤1.0{\%} at pH 5.4–10.7), whereas the phosphate removal by the A-MCM-41 was effective throughout the acidic and neutral pH values (94.7–97.6{\%} at pH 3.5–7.4). In highly alkaline conditions, however, the phosphate removal by the A-MCM-41 was greatly reduced (3.4{\%} at pH 10.7) due to the competition of the hydroxyl groups (OH−) with phosphate ions for sorption sites. The results indicated that the pseudo-second-order model was most suitable for describing the kinetic data with the parameter values of qe = 1.86 mgP g− 1 and k2 = 183.98 g mgP− 1 h− 1. The Redlich–Peterson isotherm fits well with the equilibrium data, with the parameter values of KR/aR = 7.90 mgP g− 1 and g = 0.83.",
keywords = "MCM-41, Mesoporous silica, Phosphate, Sorption, Surface functionalization",
author = "Kang, {Jin Kyu} and Kim, {Jae Hyun} and Kim, {Song Bae} and Sang-Hyup Lee and Choi, {Jae Woo} and Lee, {Chang Gu}",
year = "2016",
month = "5",
day = "14",
doi = "10.1080/19443994.2015.1038590",
language = "English",
volume = "57",
pages = "10839--10849",
journal = "Desalination and Water Treatment",
issn = "1944-3994",
publisher = "Taylor and Francis Ltd.",
number = "23",

}

TY - JOUR

T1 - Ammonium-functionalized mesoporous silica MCM-41 for phosphate removal from aqueous solutions

AU - Kang, Jin Kyu

AU - Kim, Jae Hyun

AU - Kim, Song Bae

AU - Lee, Sang-Hyup

AU - Choi, Jae Woo

AU - Lee, Chang Gu

PY - 2016/5/14

Y1 - 2016/5/14

N2 - The aim of this study was to investigate the removal of phosphate (P) using ammonium-functionalized MCM-41 (A-MCM-41). Batch experiments were performed with A-MCM-41 under various conditions including the adsorbent dose, reaction time, initial P concentration, and solution pH. The results showed that the phosphate removal in the MCM-41 (initial P conc. = 2 mgP L− 1) was negligible with the percent removal of ≤1.0% at the adsorbent dosages between 0.5 and 2.0 g L− 1. In the case of A-MCM-41, the percent removal increased from 73.6 to 100% as the adsorbent dose increased from 0.5 to 2.0 g L− 1. This indicated an enhancement of the phosphate removal due to the surface modification of the MCM-41 through the functionalization of the ammonium group (NH3 +). The results also demonstrated that the phosphate removal by the MCM-41 was minimal throughout the acidic and alkaline pH conditions (3.1% at pH 3.5; ≤1.0% at pH 5.4–10.7), whereas the phosphate removal by the A-MCM-41 was effective throughout the acidic and neutral pH values (94.7–97.6% at pH 3.5–7.4). In highly alkaline conditions, however, the phosphate removal by the A-MCM-41 was greatly reduced (3.4% at pH 10.7) due to the competition of the hydroxyl groups (OH−) with phosphate ions for sorption sites. The results indicated that the pseudo-second-order model was most suitable for describing the kinetic data with the parameter values of qe = 1.86 mgP g− 1 and k2 = 183.98 g mgP− 1 h− 1. The Redlich–Peterson isotherm fits well with the equilibrium data, with the parameter values of KR/aR = 7.90 mgP g− 1 and g = 0.83.

AB - The aim of this study was to investigate the removal of phosphate (P) using ammonium-functionalized MCM-41 (A-MCM-41). Batch experiments were performed with A-MCM-41 under various conditions including the adsorbent dose, reaction time, initial P concentration, and solution pH. The results showed that the phosphate removal in the MCM-41 (initial P conc. = 2 mgP L− 1) was negligible with the percent removal of ≤1.0% at the adsorbent dosages between 0.5 and 2.0 g L− 1. In the case of A-MCM-41, the percent removal increased from 73.6 to 100% as the adsorbent dose increased from 0.5 to 2.0 g L− 1. This indicated an enhancement of the phosphate removal due to the surface modification of the MCM-41 through the functionalization of the ammonium group (NH3 +). The results also demonstrated that the phosphate removal by the MCM-41 was minimal throughout the acidic and alkaline pH conditions (3.1% at pH 3.5; ≤1.0% at pH 5.4–10.7), whereas the phosphate removal by the A-MCM-41 was effective throughout the acidic and neutral pH values (94.7–97.6% at pH 3.5–7.4). In highly alkaline conditions, however, the phosphate removal by the A-MCM-41 was greatly reduced (3.4% at pH 10.7) due to the competition of the hydroxyl groups (OH−) with phosphate ions for sorption sites. The results indicated that the pseudo-second-order model was most suitable for describing the kinetic data with the parameter values of qe = 1.86 mgP g− 1 and k2 = 183.98 g mgP− 1 h− 1. The Redlich–Peterson isotherm fits well with the equilibrium data, with the parameter values of KR/aR = 7.90 mgP g− 1 and g = 0.83.

KW - MCM-41

KW - Mesoporous silica

KW - Phosphate

KW - Sorption

KW - Surface functionalization

UR - http://www.scopus.com/inward/record.url?scp=84958892690&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84958892690&partnerID=8YFLogxK

U2 - 10.1080/19443994.2015.1038590

DO - 10.1080/19443994.2015.1038590

M3 - Article

AN - SCOPUS:84958892690

VL - 57

SP - 10839

EP - 10849

JO - Desalination and Water Treatment

JF - Desalination and Water Treatment

SN - 1944-3994

IS - 23

ER -