Phosphonate removal from discharged circulating cooling water using iron-carbon micro-electrolysis

Zhen Zhou; Weimin Qiao; Yangbo Lin; Xuelian Shen; Dalong Hu; Jianqiao Zhang; Lu Man Jiang; Luochun Wang

doi:10.2166/wst.2014.248

Phosphonate removal from discharged circulating cooling water using iron-carbon micro-electrolysis

Zhen Zhou^*
, Weimin Qiao
, Yangbo Lin
, Xuelian Shen
, Dalong Hu
, Jianqiao Zhang
, Lu Man Jiang
, Luochun Wang

^*Corresponding author for this work

Shanghai University of Electric Power

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

26 Scopus citations

Abstract

Phosphonate is a commonly used corrosion and scale inhibitor for a circulating cooling water (CCW) system. Its discharge could cause eutrophication of receiving waters. The iron-carbon (Fe/C) microelectrolysis technology was used to degrade and remove phosphonate from discharged CCW. The influences of initial pH, Fe/C ratio (FCR) and temperature on phosphonate removal were investigated in a series of batch tests and optimized by response surface methodology. The quadratic model of phosphonate removal was obtained with satisfactory degrees of fitness. The optimum conditions with total phosphorus removal efficiency of 95% were obtained at pH 7.0, FCR of 1.25, and temperature of 45°C. The phosphonate removal mechanisms were also studied. Phosphonate removal occurred predominantly via two consecutive reactive phases: the degradation of phosphonate complexes (Ca-phosphonate) and the precipitation of Fe/C micro-electrolysis products (PO₄^3-, Ca²⁺ and Fe³⁺).

Original language	English
Pages (from-to)	524-532
Number of pages	9
Journal	Water Science and Technology
Volume	70
Issue number	3
DOIs	https://doi.org/10.2166/wst.2014.248
State	Published - 2014
Externally published	Yes

Keywords

Circulating cooling water
Iron-carbon micro-electrolysis
Phosphonate
Response surface methodology

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title = "Phosphonate removal from discharged circulating cooling water using iron-carbon micro-electrolysis",

abstract = "Phosphonate is a commonly used corrosion and scale inhibitor for a circulating cooling water (CCW) system. Its discharge could cause eutrophication of receiving waters. The iron-carbon (Fe/C) microelectrolysis technology was used to degrade and remove phosphonate from discharged CCW. The influences of initial pH, Fe/C ratio (FCR) and temperature on phosphonate removal were investigated in a series of batch tests and optimized by response surface methodology. The quadratic model of phosphonate removal was obtained with satisfactory degrees of fitness. The optimum conditions with total phosphorus removal efficiency of 95\% were obtained at pH 7.0, FCR of 1.25, and temperature of 45°C. The phosphonate removal mechanisms were also studied. Phosphonate removal occurred predominantly via two consecutive reactive phases: the degradation of phosphonate complexes (Ca-phosphonate) and the precipitation of Fe/C micro-electrolysis products (PO43-, Ca2+ and Fe3+).",

keywords = "Circulating cooling water, Iron-carbon micro-electrolysis, Phosphonate, Response surface methodology",

author = "Zhen Zhou and Weimin Qiao and Yangbo Lin and Xuelian Shen and Dalong Hu and Jianqiao Zhang and Jiang, \{Lu Man\} and Luochun Wang",

year = "2014",

doi = "10.2166/wst.2014.248",

language = "英语",

volume = "70",

pages = "524--532",

journal = "Water Science and Technology",

issn = "0273-1223",

publisher = "IWA Publishing",

number = "3",

}

TY - JOUR

T1 - Phosphonate removal from discharged circulating cooling water using iron-carbon micro-electrolysis

AU - Zhou, Zhen

AU - Qiao, Weimin

AU - Lin, Yangbo

AU - Shen, Xuelian

AU - Hu, Dalong

AU - Zhang, Jianqiao

AU - Jiang, Lu Man

AU - Wang, Luochun

PY - 2014

Y1 - 2014

N2 - Phosphonate is a commonly used corrosion and scale inhibitor for a circulating cooling water (CCW) system. Its discharge could cause eutrophication of receiving waters. The iron-carbon (Fe/C) microelectrolysis technology was used to degrade and remove phosphonate from discharged CCW. The influences of initial pH, Fe/C ratio (FCR) and temperature on phosphonate removal were investigated in a series of batch tests and optimized by response surface methodology. The quadratic model of phosphonate removal was obtained with satisfactory degrees of fitness. The optimum conditions with total phosphorus removal efficiency of 95% were obtained at pH 7.0, FCR of 1.25, and temperature of 45°C. The phosphonate removal mechanisms were also studied. Phosphonate removal occurred predominantly via two consecutive reactive phases: the degradation of phosphonate complexes (Ca-phosphonate) and the precipitation of Fe/C micro-electrolysis products (PO43-, Ca2+ and Fe3+).

AB - Phosphonate is a commonly used corrosion and scale inhibitor for a circulating cooling water (CCW) system. Its discharge could cause eutrophication of receiving waters. The iron-carbon (Fe/C) microelectrolysis technology was used to degrade and remove phosphonate from discharged CCW. The influences of initial pH, Fe/C ratio (FCR) and temperature on phosphonate removal were investigated in a series of batch tests and optimized by response surface methodology. The quadratic model of phosphonate removal was obtained with satisfactory degrees of fitness. The optimum conditions with total phosphorus removal efficiency of 95% were obtained at pH 7.0, FCR of 1.25, and temperature of 45°C. The phosphonate removal mechanisms were also studied. Phosphonate removal occurred predominantly via two consecutive reactive phases: the degradation of phosphonate complexes (Ca-phosphonate) and the precipitation of Fe/C micro-electrolysis products (PO43-, Ca2+ and Fe3+).

KW - Circulating cooling water

KW - Iron-carbon micro-electrolysis

KW - Phosphonate

KW - Response surface methodology

UR - https://www.scopus.com/pages/publications/84907313486

U2 - 10.2166/wst.2014.248

DO - 10.2166/wst.2014.248

M3 - 文章

C2 - 25098884

AN - SCOPUS:84907313486

SN - 0273-1223

VL - 70

SP - 524

EP - 532

JO - Water Science and Technology

JF - Water Science and Technology

IS - 3

ER -

Phosphonate removal from discharged circulating cooling water using iron-carbon micro-electrolysis

Abstract

Keywords

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