Adsorption Kinetics of Arsenic (V) on Nanoscale Zero-Valent Iron Supported by Activated Carbon

Huijie Zhu; Mingyan Shi; Xiuji Zhang; Bo Liu; Dahu Yao

doi:10.3390/nano10091791

Adsorption Kinetics of Arsenic (V) on Nanoscale Zero-Valent Iron Supported by Activated Carbon

Huijie Zhu, Mingyan Shi, Xiuji Zhang, Bo Liu^*, Dahu Yao

^*Corresponding author for this work

Shandong University of Technology

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

18 Citations (Scopus)

Abstract

The presence of arsenic (As) in drinking water is of serious concern due to its negative impact on human health. This work reports on the kinetics of nanoscale zero-valent iron (Fe-0) supported by activated carbon (NZVI/AC) for the removal of As (V) species from aqueous solutions. To better understand the factors affecting this process, we investigated the effects of various experimental parameters including initial As (V) concentration, adsorbent dosage, pH, temperature, and coexisting ions on the adsorption kinetics using a batch-adsorption method. The optimum conditions for As (V) removal by NZVI/AC were found to be: 318 K, pH 3.5, an adsorbent dosage of 1.5 g/L, and an equilibrium time of 72 h. A greater mass of NZVI/AC, lower concentration of As (V) and lower pH positively promoted adsorption kinetics. The presence of phosphate (PO43-) and silicate (SiO42-) markedly inhibited As (V) removal kinetics. However, in the presence of 4.5 g/L NZVI/AC, >= 99.9% of As (V) was removed from raw groundwater.

Original language	English
Journal	Nanomaterials
Volume	10
Issue number	9
DOIs	https://doi.org/10.3390/nano10091791
Publication status	Published - 2020
Externally published	Yes

UN SDGs

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

Access to Document

10.3390/nano10091791

Cite this

@article{c079c23ed583429fa5a66813ec373f7b,

title = "Adsorption Kinetics of Arsenic (V) on Nanoscale Zero-Valent Iron Supported by Activated Carbon",

abstract = "The presence of arsenic (As) in drinking water is of serious concern due to its negative impact on human health. This work reports on the kinetics of nanoscale zero-valent iron (Fe-0) supported by activated carbon (NZVI/AC) for the removal of As (V) species from aqueous solutions. To better understand the factors affecting this process, we investigated the effects of various experimental parameters including initial As (V) concentration, adsorbent dosage, pH, temperature, and coexisting ions on the adsorption kinetics using a batch-adsorption method. The optimum conditions for As (V) removal by NZVI/AC were found to be: 318 K, pH 3.5, an adsorbent dosage of 1.5 g/L, and an equilibrium time of 72 h. A greater mass of NZVI/AC, lower concentration of As (V) and lower pH positively promoted adsorption kinetics. The presence of phosphate (PO43-) and silicate (SiO42-) markedly inhibited As (V) removal kinetics. However, in the presence of 4.5 g/L NZVI/AC, >= 99.9% of As (V) was removed from raw groundwater.",

author = "Huijie Zhu and Mingyan Shi and Xiuji Zhang and Bo Liu and Dahu Yao",

year = "2020",

doi = "10.3390/nano10091791",

language = "English",

volume = "10",

journal = "Nanomaterials",

issn = "2079-4991",

number = "9",

}

TY - JOUR

T1 - Adsorption Kinetics of Arsenic (V) on Nanoscale Zero-Valent Iron Supported by Activated Carbon

AU - Zhu, Huijie

AU - Shi, Mingyan

AU - Zhang, Xiuji

AU - Liu, Bo

AU - Yao, Dahu

PY - 2020

Y1 - 2020

N2 - The presence of arsenic (As) in drinking water is of serious concern due to its negative impact on human health. This work reports on the kinetics of nanoscale zero-valent iron (Fe-0) supported by activated carbon (NZVI/AC) for the removal of As (V) species from aqueous solutions. To better understand the factors affecting this process, we investigated the effects of various experimental parameters including initial As (V) concentration, adsorbent dosage, pH, temperature, and coexisting ions on the adsorption kinetics using a batch-adsorption method. The optimum conditions for As (V) removal by NZVI/AC were found to be: 318 K, pH 3.5, an adsorbent dosage of 1.5 g/L, and an equilibrium time of 72 h. A greater mass of NZVI/AC, lower concentration of As (V) and lower pH positively promoted adsorption kinetics. The presence of phosphate (PO43-) and silicate (SiO42-) markedly inhibited As (V) removal kinetics. However, in the presence of 4.5 g/L NZVI/AC, >= 99.9% of As (V) was removed from raw groundwater.

AB - The presence of arsenic (As) in drinking water is of serious concern due to its negative impact on human health. This work reports on the kinetics of nanoscale zero-valent iron (Fe-0) supported by activated carbon (NZVI/AC) for the removal of As (V) species from aqueous solutions. To better understand the factors affecting this process, we investigated the effects of various experimental parameters including initial As (V) concentration, adsorbent dosage, pH, temperature, and coexisting ions on the adsorption kinetics using a batch-adsorption method. The optimum conditions for As (V) removal by NZVI/AC were found to be: 318 K, pH 3.5, an adsorbent dosage of 1.5 g/L, and an equilibrium time of 72 h. A greater mass of NZVI/AC, lower concentration of As (V) and lower pH positively promoted adsorption kinetics. The presence of phosphate (PO43-) and silicate (SiO42-) markedly inhibited As (V) removal kinetics. However, in the presence of 4.5 g/L NZVI/AC, >= 99.9% of As (V) was removed from raw groundwater.

U2 - 10.3390/nano10091791

DO - 10.3390/nano10091791

M3 - Article

SN - 2079-4991

VL - 10

JO - Nanomaterials

JF - Nanomaterials

IS - 9

ER -

Adsorption Kinetics of Arsenic (V) on Nanoscale Zero-Valent Iron Supported by Activated Carbon

Abstract

UN SDGs

Access to Document

Fingerprint

Cite this