Application of Phosphate Materials as Constructed Wetland Fillers for Efficient Removal of Heavy Metals from Wastewater

Xiaodan Wu; Ni Hong; Qingjing Cen; Jiaxin Lu; Hui Wan; Wei Liu; Hongli Zheng; Roger Ruan; Kirk Cobb; Yuhuan Liu

doi:10.3390/ijerph19095344

Application of Phosphate Materials as Constructed Wetland Fillers for Efficient Removal of Heavy Metals from Wastewater

Xiaodan Wu, Ni Hong, Qingjing Cen, Jiaxin Lu, Hui Wan, Wei Liu, Hongli Zheng, Roger Ruan, Kirk Cobb, Yuhuan Liu

Bioproducts and Biosystems Engineering

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

2 Scopus citations

Abstract

Constructed wetlands are an environmentally friendly and economically efficient sewage treatment technology. Heavy metals (HMs) removal is always regarded as one of the most important tasks in constructed wetlands, which have aroused increasing concern in the field of contamination control in recent times. The fillers of constructed wetlands play an important role in HMs removal. However, traditional wetland fillers (e.g., zeolite, sand, and gravel) are known to be imperfect because of their low adsorption capacity. Regarding HMs removal, our work involved the selection of prominent absorbents, the evaluation of adsorption stability for various treatments, and then the possibility of applying this HM removal technology to constructed wetlands. For this purpose, several phosphate materials were tested to remove the heavy metals Cu and Zn. Three good phosphates including hydroxyapatite (HAP), calcium phosphate (CP), and physic acid sodium salt hydrate (PAS) demonstrated fast removal efficiency of HMs (Cu, Zn) from aqueous solution. The maximum removal rates of Cu²⁺ and Zn²⁺ by HAP, CP, and PAS reached 81.6% and 95.8%; 66.9% and 70.4%; 98.8% and 1.99%, respectively. In addition, better adsorption stability of these heavy metals was found to occur with a wide variation of desorption time and pH range. The most remarkable efficiency for heavy metal removal among tested phosphates was PAS, followed by HAP and CP. This study can provide a basis for the application of HMs removal in manmade wetland systems.

Original language	English (US)
Article number	5344
Journal	International journal of environmental research and public health
Volume	19
Issue number	9
DOIs	https://doi.org/10.3390/ijerph19095344
State	Published - May 1 2022

Bibliographical note

Funding Information:
Funding: This research was funded by the Open Research Fund Program of State Environmental Protection Key Laboratory of Food Chain Pollution Control (FC2021YB10), the Youth Talent Training Program for Academic and Technical Leaders of Major Disciplines in Jiangxi Province (20212BCJ23042), the University–Industry Cooperation Collaborative Education Program of the Ministry of Education (202102152021), the National Natural Science Foundation of China (22166026, 21878139, and 21878237), the State Key Laboratory of Food Science and Technology, Nanchang University (SKLF-ZZB-202122), and the Key Project of Jiangxi Provincial Department of Science and Technology Jiangxi (20181BBF60026).

Publisher Copyright:
© 2022 by the authors. Licensee MDPI, Basel, Switzerland.

Keywords

adsorption kinetic model
adsorption selectivity
adsorption stability
copper
physic acid sodium salt hydrate

PubMed: MeSH publication types

Journal Article
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title = "Application of Phosphate Materials as Constructed Wetland Fillers for Efficient Removal of Heavy Metals from Wastewater",

abstract = "Constructed wetlands are an environmentally friendly and economically efficient sewage treatment technology. Heavy metals (HMs) removal is always regarded as one of the most important tasks in constructed wetlands, which have aroused increasing concern in the field of contamination control in recent times. The fillers of constructed wetlands play an important role in HMs removal. However, traditional wetland fillers (e.g., zeolite, sand, and gravel) are known to be imperfect because of their low adsorption capacity. Regarding HMs removal, our work involved the selection of prominent absorbents, the evaluation of adsorption stability for various treatments, and then the possibility of applying this HM removal technology to constructed wetlands. For this purpose, several phosphate materials were tested to remove the heavy metals Cu and Zn. Three good phosphates including hydroxyapatite (HAP), calcium phosphate (CP), and physic acid sodium salt hydrate (PAS) demonstrated fast removal efficiency of HMs (Cu, Zn) from aqueous solution. The maximum removal rates of Cu2+ and Zn2+ by HAP, CP, and PAS reached 81.6% and 95.8%; 66.9% and 70.4%; 98.8% and 1.99%, respectively. In addition, better adsorption stability of these heavy metals was found to occur with a wide variation of desorption time and pH range. The most remarkable efficiency for heavy metal removal among tested phosphates was PAS, followed by HAP and CP. This study can provide a basis for the application of HMs removal in manmade wetland systems.",

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author = "Xiaodan Wu and Ni Hong and Qingjing Cen and Jiaxin Lu and Hui Wan and Wei Liu and Hongli Zheng and Roger Ruan and Kirk Cobb and Yuhuan Liu",

note = "Funding Information: Funding: This research was funded by the Open Research Fund Program of State Environmental Protection Key Laboratory of Food Chain Pollution Control (FC2021YB10), the Youth Talent Training Program for Academic and Technical Leaders of Major Disciplines in Jiangxi Province (20212BCJ23042), the University–Industry Cooperation Collaborative Education Program of the Ministry of Education (202102152021), the National Natural Science Foundation of China (22166026, 21878139, and 21878237), the State Key Laboratory of Food Science and Technology, Nanchang University (SKLF-ZZB-202122), and the Key Project of Jiangxi Provincial Department of Science and Technology Jiangxi (20181BBF60026). Publisher Copyright: {\textcopyright} 2022 by the authors. Licensee MDPI, Basel, Switzerland.",

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AU - Wu, Xiaodan

AU - Hong, Ni

AU - Cen, Qingjing

AU - Lu, Jiaxin

AU - Wan, Hui

AU - Liu, Wei

AU - Zheng, Hongli

AU - Ruan, Roger

AU - Cobb, Kirk

AU - Liu, Yuhuan

N1 - Funding Information: Funding: This research was funded by the Open Research Fund Program of State Environmental Protection Key Laboratory of Food Chain Pollution Control (FC2021YB10), the Youth Talent Training Program for Academic and Technical Leaders of Major Disciplines in Jiangxi Province (20212BCJ23042), the University–Industry Cooperation Collaborative Education Program of the Ministry of Education (202102152021), the National Natural Science Foundation of China (22166026, 21878139, and 21878237), the State Key Laboratory of Food Science and Technology, Nanchang University (SKLF-ZZB-202122), and the Key Project of Jiangxi Provincial Department of Science and Technology Jiangxi (20181BBF60026). Publisher Copyright: © 2022 by the authors. Licensee MDPI, Basel, Switzerland.

PY - 2022/5/1

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N2 - Constructed wetlands are an environmentally friendly and economically efficient sewage treatment technology. Heavy metals (HMs) removal is always regarded as one of the most important tasks in constructed wetlands, which have aroused increasing concern in the field of contamination control in recent times. The fillers of constructed wetlands play an important role in HMs removal. However, traditional wetland fillers (e.g., zeolite, sand, and gravel) are known to be imperfect because of their low adsorption capacity. Regarding HMs removal, our work involved the selection of prominent absorbents, the evaluation of adsorption stability for various treatments, and then the possibility of applying this HM removal technology to constructed wetlands. For this purpose, several phosphate materials were tested to remove the heavy metals Cu and Zn. Three good phosphates including hydroxyapatite (HAP), calcium phosphate (CP), and physic acid sodium salt hydrate (PAS) demonstrated fast removal efficiency of HMs (Cu, Zn) from aqueous solution. The maximum removal rates of Cu2+ and Zn2+ by HAP, CP, and PAS reached 81.6% and 95.8%; 66.9% and 70.4%; 98.8% and 1.99%, respectively. In addition, better adsorption stability of these heavy metals was found to occur with a wide variation of desorption time and pH range. The most remarkable efficiency for heavy metal removal among tested phosphates was PAS, followed by HAP and CP. This study can provide a basis for the application of HMs removal in manmade wetland systems.

AB - Constructed wetlands are an environmentally friendly and economically efficient sewage treatment technology. Heavy metals (HMs) removal is always regarded as one of the most important tasks in constructed wetlands, which have aroused increasing concern in the field of contamination control in recent times. The fillers of constructed wetlands play an important role in HMs removal. However, traditional wetland fillers (e.g., zeolite, sand, and gravel) are known to be imperfect because of their low adsorption capacity. Regarding HMs removal, our work involved the selection of prominent absorbents, the evaluation of adsorption stability for various treatments, and then the possibility of applying this HM removal technology to constructed wetlands. For this purpose, several phosphate materials were tested to remove the heavy metals Cu and Zn. Three good phosphates including hydroxyapatite (HAP), calcium phosphate (CP), and physic acid sodium salt hydrate (PAS) demonstrated fast removal efficiency of HMs (Cu, Zn) from aqueous solution. The maximum removal rates of Cu2+ and Zn2+ by HAP, CP, and PAS reached 81.6% and 95.8%; 66.9% and 70.4%; 98.8% and 1.99%, respectively. In addition, better adsorption stability of these heavy metals was found to occur with a wide variation of desorption time and pH range. The most remarkable efficiency for heavy metal removal among tested phosphates was PAS, followed by HAP and CP. This study can provide a basis for the application of HMs removal in manmade wetland systems.

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KW - adsorption selectivity

KW - adsorption stability

KW - copper

KW - physic acid sodium salt hydrate

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ER -

Application of Phosphate Materials as Constructed Wetland Fillers for Efficient Removal of Heavy Metals from Wastewater

Abstract

Bibliographical note

Keywords

PubMed: MeSH publication types

UN SDGs

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