Efficient removal of Cd(II) using SiO2-Mg(OH)2 nanocomposites derived from sepiolite

Zhendong He; Bozhi Ren; Andrew Hursthouse; Zhenghua Wang

doi:10.3390/ijerph17072223

Efficient removal of Cd(II) using SiO₂-Mg(OH)₂ nanocomposites derived from sepiolite

Zhendong He
, Bozhi Ren^*
, Andrew Hursthouse
, Zhenghua Wang

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

98 Downloads (Pure)

Abstract

The pollution of Cadmium (Cd) species in natural water has attracted more and more attention due to its high cumulative toxicity. In the search for improved removal of cadmium from contaminated water we characterized uptake on a recently identified nanomaterial (SiO₂-Mg(OH)₂) obtained by subjecting sepiolite to acid-base modification. The structural characteristics of SiO₂-Mg(OH)₂ were analyzed by means of SEM-EDS, FTIR and PXRD. Static adsorption experiments were carried out to evaluate the effect of contact time, temperature, amount of adsorbent, and pH-value on the adsorption of Cd(II) by SiO₂-Mg(OH)₂. The results show that the pore structure of SiO₂-Mg(OH)₂ is well developed, with specific surface area, pore size and pore volume increased by 60.09%, 16.76%, and 43.59%, respectively compared to natural sepiolite. After modification, the sepiolite substrate adsorbs Cd(II) following pseudo-second-order kinetics and a Langmuir surface adsorption model, suggesting both chemical and physical adsorption. At 298K, the maximum saturated adsorption capacity fitted by Sips model of SiO₂-Mg(OH)₂ regarding Cd(II) is 121.23 mg/g. The results show that SiO₂-Mg(OH)₂ nanocomposite has efficient adsorption performance, which is expected to be a remediation agent for heavy metal cadmium polluted wastewater.

Original language	English
Article number	2223
Number of pages	12
Journal	International Journal of Environmental Research and Public Health
Volume	17
Issue number	7
Early online date	26 Mar 2020
DOIs	https://doi.org/10.3390/ijerph17072223
Publication status	Published - 1 Apr 2020

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 6 Clean Water and Sanitation
SDG 9 Industry, Innovation, and Infrastructure
SDG 12 Responsible Consumption and Production

Keywords

cadmium
composite modification
nanomaterials
sepiolite
adsoprtion

Access to Document

10.3390/ijerph17072223Licence: CC BY

2020 03 16 He et al Efficient finalFinal published version, 1.71 MBLicence: CC BY

High End Expert Scholarship – Hunan Regional Government
Hursthouse, A. (Recipient)
2016 → 2019
Activity: Other › Types of Award - Fellowship awarded competitively

Liancheng Friendship Award of Xiangtan City, Hunan.
Hursthouse, A. (Recipient), 12 Dec 2017
Prize: Prize (including medals and awards)

Cite this

@article{4c231d4d9e3943fc99f6b6861c0ea735,

title = "Efficient removal of Cd(II) using SiO2-Mg(OH)2 nanocomposites derived from sepiolite",

abstract = "The pollution of Cadmium (Cd) species in natural water has attracted more and more attention due to its high cumulative toxicity. In the search for improved removal of cadmium from contaminated water we characterized uptake on a recently identified nanomaterial (SiO2-Mg(OH)2) obtained by subjecting sepiolite to acid-base modification. The structural characteristics of SiO2-Mg(OH)2 were analyzed by means of SEM-EDS, FTIR and PXRD. Static adsorption experiments were carried out to evaluate the effect of contact time, temperature, amount of adsorbent, and pH-value on the adsorption of Cd(II) by SiO2-Mg(OH)2. The results show that the pore structure of SiO2-Mg(OH)2 is well developed, with specific surface area, pore size and pore volume increased by 60.09\%, 16.76\%, and 43.59\%, respectively compared to natural sepiolite. After modification, the sepiolite substrate adsorbs Cd(II) following pseudo-second-order kinetics and a Langmuir surface adsorption model, suggesting both chemical and physical adsorption. At 298K, the maximum saturated adsorption capacity fitted by Sips model of SiO2-Mg(OH)2 regarding Cd(II) is 121.23 mg/g. The results show that SiO2-Mg(OH)2 nanocomposite has efficient adsorption performance, which is expected to be a remediation agent for heavy metal cadmium polluted wastewater.",

keywords = "cadmium, composite modification, nanomaterials, sepiolite, adsoprtion",

author = "Zhendong He and Bozhi Ren and Andrew Hursthouse and Zhenghua Wang",

year = "2020",

month = apr,

day = "1",

doi = "10.3390/ijerph17072223",

language = "English",

volume = "17",

journal = "International Journal of Environmental Research and Public Health",

issn = "1661-7827",

publisher = "Multidisciplinary Digital Publishing Institute (MDPI)",

number = "7",

}

TY - JOUR

T1 - Efficient removal of Cd(II) using SiO2-Mg(OH)2 nanocomposites derived from sepiolite

AU - He, Zhendong

AU - Ren, Bozhi

AU - Hursthouse, Andrew

AU - Wang, Zhenghua

PY - 2020/4/1

Y1 - 2020/4/1

N2 - The pollution of Cadmium (Cd) species in natural water has attracted more and more attention due to its high cumulative toxicity. In the search for improved removal of cadmium from contaminated water we characterized uptake on a recently identified nanomaterial (SiO2-Mg(OH)2) obtained by subjecting sepiolite to acid-base modification. The structural characteristics of SiO2-Mg(OH)2 were analyzed by means of SEM-EDS, FTIR and PXRD. Static adsorption experiments were carried out to evaluate the effect of contact time, temperature, amount of adsorbent, and pH-value on the adsorption of Cd(II) by SiO2-Mg(OH)2. The results show that the pore structure of SiO2-Mg(OH)2 is well developed, with specific surface area, pore size and pore volume increased by 60.09%, 16.76%, and 43.59%, respectively compared to natural sepiolite. After modification, the sepiolite substrate adsorbs Cd(II) following pseudo-second-order kinetics and a Langmuir surface adsorption model, suggesting both chemical and physical adsorption. At 298K, the maximum saturated adsorption capacity fitted by Sips model of SiO2-Mg(OH)2 regarding Cd(II) is 121.23 mg/g. The results show that SiO2-Mg(OH)2 nanocomposite has efficient adsorption performance, which is expected to be a remediation agent for heavy metal cadmium polluted wastewater.

AB - The pollution of Cadmium (Cd) species in natural water has attracted more and more attention due to its high cumulative toxicity. In the search for improved removal of cadmium from contaminated water we characterized uptake on a recently identified nanomaterial (SiO2-Mg(OH)2) obtained by subjecting sepiolite to acid-base modification. The structural characteristics of SiO2-Mg(OH)2 were analyzed by means of SEM-EDS, FTIR and PXRD. Static adsorption experiments were carried out to evaluate the effect of contact time, temperature, amount of adsorbent, and pH-value on the adsorption of Cd(II) by SiO2-Mg(OH)2. The results show that the pore structure of SiO2-Mg(OH)2 is well developed, with specific surface area, pore size and pore volume increased by 60.09%, 16.76%, and 43.59%, respectively compared to natural sepiolite. After modification, the sepiolite substrate adsorbs Cd(II) following pseudo-second-order kinetics and a Langmuir surface adsorption model, suggesting both chemical and physical adsorption. At 298K, the maximum saturated adsorption capacity fitted by Sips model of SiO2-Mg(OH)2 regarding Cd(II) is 121.23 mg/g. The results show that SiO2-Mg(OH)2 nanocomposite has efficient adsorption performance, which is expected to be a remediation agent for heavy metal cadmium polluted wastewater.

KW - cadmium

KW - composite modification

KW - nanomaterials

KW - sepiolite

KW - adsoprtion

U2 - 10.3390/ijerph17072223

DO - 10.3390/ijerph17072223

M3 - Article

SN - 1661-7827

VL - 17

JO - International Journal of Environmental Research and Public Health

JF - International Journal of Environmental Research and Public Health

IS - 7

M1 - 2223

ER -

Efficient removal of Cd(II) using SiO2-Mg(OH)2 nanocomposites derived from sepiolite

Abstract

UN SDGs

Keywords

Access to Document

Fingerprint

Activities

High End Expert Scholarship – Hunan Regional Government

Prizes

Liancheng Friendship Award of Xiangtan City, Hunan.

Cite this

Efficient removal of Cd(II) using SiO₂-Mg(OH)₂ nanocomposites derived from sepiolite