Synthesis of clay-supported nanoscale zero-valent iron using green tea extract for the removal of phosphorus from aqueous solutions

Akbar Soliemanzadeh; Majid Fekri

doi:10.1016/j.cjche.2016.12.006

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Synthesis of clay-supported nanoscale zero-valent iron using green tea extract for the removal of phosphorus from aqueous solutions

Separation Science and Engineering | Updated：2026-01-06

- Synthesis of clay-supported nanoscale zero-valent iron using green tea extract for the removal of phosphorus from aqueous solutions
- Synthesis of clay-supported nanoscale zero-valent iron using green tea extract for the removal of phosphorus from aqueous solutions
- 中国化学工程学报（英文版） 2017年25卷第7期页码：924-930
- Affiliations：
  
  Department of Soil Science, College of Agriculture, Shahid Bahonar University of Kerman, Kerman,Iran
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2016.12.006
  中图分类号：
- 纸质出版：2017
- Accepted：
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Akbar Soliemanzadeh, Majid Fekri. Synthesis of clay-supported nanoscale zero-valent iron using green tea extract for the removal of phosphorus from aqueous solutions[J]. 中国化学工程学报（英文版）, 2017,25(7):924-930.

Akbar Soliemanzadeh, Majid Fekri. Synthesis of clay-supported nanoscale zero-valent iron using green tea extract for the removal of phosphorus from aqueous solutions[J]. , 2017, 25(7): 924-930.
Akbar Soliemanzadeh, Majid Fekri. Synthesis of clay-supported nanoscale zero-valent iron using green tea extract for the removal of phosphorus from aqueous solutions[J]. 中国化学工程学报（英文版）, 2017,25(7):924-930. DOI： 10.1016/j.cjche.2016.12.006.

Akbar Soliemanzadeh, Majid Fekri. Synthesis of clay-supported nanoscale zero-valent iron using green tea extract for the removal of phosphorus from aqueous solutions[J]. , 2017, 25(7): 924-930. DOI： 10.1016/j.cjche.2016.12.006.

摘要

Abstract

This study addresses the synthesis of nanoscale zero-valent iron (nZVI) in the presence of natural bentonite (B-nZVI) using green tea extract. The natural bentonite and B-nZVI were then applied for the removal of phosphorus from aqueous solutions at various concentrations

pH levels and contact time. The desorption of phosphorus (P) from adsorbents was done immediately after sorption at the maximum initial concentration using the successive dilution method. The characterization of FTIR

SEM

and XRD indicated that nZVI was successfully loaded to the surface of natural bentonite. The sorption of phosphorus on B-nZVI was observed to be pH-dependent

with maximum phosphorus removal occurring at the pH range of 2 to 5. The results demonstrate that the maximum sorption capacities of natural bentonite and B-nZVI were 4.61 and 27.63 mg·g

-1

respectively. Langmuir

Freundlich

and Redlich-Peterson models properly described the sorption isotherm data. For either adsorbent

desorption isotherms did not coincide with their corresponding sorption isotherms

suggesting the occurrence of irreversibility and hysteresis. The average percentages of retained phosph

orus released from natural bentonite and B-nZVI were 80% and 9%

respectively. The results indicated that sorption kinetics was best described by the pseudo-second-order model. The present study suggests that B-nZVI could be used as a suitable adsorbent for the removal of phosphorus from aqueous solutions.

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