Immobilization of copper under an acid leach of colloidal pyrite waste rocks by a fixed-bed column

Yan Yang; Tianhu Chen; Ping Li; Chengsong Qing; Qiaoqin Xie; Xinmin Zhan

doi:10.1007/s12665-015-4991-5

Immobilization of copper under an acid leach of colloidal pyrite waste rocks by a fixed-bed column

Yan Yang, Tianhu Chen, Ping Li, Chengsong Qing, Qiaoqin Xie, Xinmin Zhan

Civil Engineering

Research output: Contribution to a Journal (Peer & Non Peer) › Article › peer-review

6 Citations (Scopus)

Abstract

Colloidal pyrite waste rocks (CPWR) which are mainly composed of colloidal pyrite and siderite widely deposit in sulfide mines in the middle and lower reaches of the Yangtze River belt, China, especially in Tongling City, Anhui Province, China. In this paper, a fixed-bed column was used to investigate the weathering and oxidation of CPWR and its role in immobilizing low-concentration Cu (10 mg L⁻¹) under weakly acidic leach (pH = 5.0). The experimental results indicated that the breakthrough capacity was around 14.0 mg Cu g⁻¹ CPWR when Cu²⁺ breakthrough concentration was 0.5 mg L⁻¹. Sequential extraction of Cu and dithionite–citrate–bicarbonate extraction of free iron in the used CPWR after the column breakthrough indicated that Cu removal by CPWR consisted of the following processes: oxidation of pyrite and dissolution of siderite in CPWR, ferrous oxidation, and adsorption of Cu on ferric (hydr)oxides. This study shows the potential application of CPWR as an effective sorbent for the removal of low-concentration Cu from acid mine drainage.

Original language	English
Article number	205
Pages (from-to)	1-8
Number of pages	8
Journal	Environmental Earth Sciences
Volume	75
Issue number	3
DOIs	https://doi.org/10.1007/s12665-015-4991-5
Publication status	Published - 1 Feb 2016

Keywords

Colloidal pyrite
Copper
Ferric (hydr)oxides
Fixed-bed column
Siderite

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10.1007/s12665-015-4991-5

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title = "Immobilization of copper under an acid leach of colloidal pyrite waste rocks by a fixed-bed column",

abstract = "Colloidal pyrite waste rocks (CPWR) which are mainly composed of colloidal pyrite and siderite widely deposit in sulfide mines in the middle and lower reaches of the Yangtze River belt, China, especially in Tongling City, Anhui Province, China. In this paper, a fixed-bed column was used to investigate the weathering and oxidation of CPWR and its role in immobilizing low-concentration Cu (10 mg L−1) under weakly acidic leach (pH = 5.0). The experimental results indicated that the breakthrough capacity was around 14.0 mg Cu g−1 CPWR when Cu2+ breakthrough concentration was 0.5 mg L−1. Sequential extraction of Cu and dithionite–citrate–bicarbonate extraction of free iron in the used CPWR after the column breakthrough indicated that Cu removal by CPWR consisted of the following processes: oxidation of pyrite and dissolution of siderite in CPWR, ferrous oxidation, and adsorption of Cu on ferric (hydr)oxides. This study shows the potential application of CPWR as an effective sorbent for the removal of low-concentration Cu from acid mine drainage.",

keywords = "Colloidal pyrite, Copper, Ferric (hydr)oxides, Fixed-bed column, Siderite",

author = "Yan Yang and Tianhu Chen and Ping Li and Chengsong Qing and Qiaoqin Xie and Xinmin Zhan",

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T1 - Immobilization of copper under an acid leach of colloidal pyrite waste rocks by a fixed-bed column

AU - Yang, Yan

AU - Chen, Tianhu

AU - Li, Ping

AU - Qing, Chengsong

AU - Xie, Qiaoqin

AU - Zhan, Xinmin

PY - 2016/2/1

Y1 - 2016/2/1

N2 - Colloidal pyrite waste rocks (CPWR) which are mainly composed of colloidal pyrite and siderite widely deposit in sulfide mines in the middle and lower reaches of the Yangtze River belt, China, especially in Tongling City, Anhui Province, China. In this paper, a fixed-bed column was used to investigate the weathering and oxidation of CPWR and its role in immobilizing low-concentration Cu (10 mg L−1) under weakly acidic leach (pH = 5.0). The experimental results indicated that the breakthrough capacity was around 14.0 mg Cu g−1 CPWR when Cu2+ breakthrough concentration was 0.5 mg L−1. Sequential extraction of Cu and dithionite–citrate–bicarbonate extraction of free iron in the used CPWR after the column breakthrough indicated that Cu removal by CPWR consisted of the following processes: oxidation of pyrite and dissolution of siderite in CPWR, ferrous oxidation, and adsorption of Cu on ferric (hydr)oxides. This study shows the potential application of CPWR as an effective sorbent for the removal of low-concentration Cu from acid mine drainage.

AB - Colloidal pyrite waste rocks (CPWR) which are mainly composed of colloidal pyrite and siderite widely deposit in sulfide mines in the middle and lower reaches of the Yangtze River belt, China, especially in Tongling City, Anhui Province, China. In this paper, a fixed-bed column was used to investigate the weathering and oxidation of CPWR and its role in immobilizing low-concentration Cu (10 mg L−1) under weakly acidic leach (pH = 5.0). The experimental results indicated that the breakthrough capacity was around 14.0 mg Cu g−1 CPWR when Cu2+ breakthrough concentration was 0.5 mg L−1. Sequential extraction of Cu and dithionite–citrate–bicarbonate extraction of free iron in the used CPWR after the column breakthrough indicated that Cu removal by CPWR consisted of the following processes: oxidation of pyrite and dissolution of siderite in CPWR, ferrous oxidation, and adsorption of Cu on ferric (hydr)oxides. This study shows the potential application of CPWR as an effective sorbent for the removal of low-concentration Cu from acid mine drainage.

KW - Colloidal pyrite

KW - Copper

KW - Ferric (hydr)oxides

KW - Fixed-bed column

KW - Siderite

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U2 - 10.1007/s12665-015-4991-5

DO - 10.1007/s12665-015-4991-5

M3 - Article

SN - 1866-6280

VL - 75

SP - 1

EP - 8

JO - Environmental Earth Sciences

JF - Environmental Earth Sciences

IS - 3

M1 - 205

ER -

Immobilization of copper under an acid leach of colloidal pyrite waste rocks by a fixed-bed column

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