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Author:

Zhao, Hang (Zhao, Hang.) | Zhang, Qijun (Zhang, Qijun.) | Li, Guanjun (Li, Guanjun.) | Zhang, Xiaoguang (Zhang, Xiaoguang.) | Pan, De'an (Pan, De'an.)

Indexed by:

EI Scopus SCIE

Abstract:

A green and effective process for bromine recovery from crude bromine salts by-products (CBSBPs) of waste printed circuit boards smelting was developed. Over 99 % of bromine was first converted to Br2(l) under optimal acid oxidation conditions (pH 0, NaClO3 10 g/L, stirring rate 200 rpm, time 30 min). 98.25 % of the as-formed Br2(l) can be then purified and recovered by precisely controlling the extraction (single extraction O/A 1.5, multiple extraction O/A 1/3, extract stages 4, extraction time 3 min, and vibration time 2 min) and stripping (Na2CO3 20.5 g/L, CO(NH2)2 3.15 g/L, stripping A/O 1/3, stripping time 3 min, stripping temperature 55 degrees C) conditions. The purity of the recovered NaBr exceeds 99 %. Moreover, zero wastewater discharge and the remaining stripping organic phase can be repeatable used over 15 times. The proposed method is a sustainable, green, and closed-loop process for bromine recovery from CBSBPs.

Keyword:

Crude bromine salts by-products Bromine recovery and purification Acid oxidation conversion Extraction and stripping Waste printed circuit boards

Author Community:

  • [ 1 ] [Zhao, Hang]Beijing Univ Technol, Coll Mat Sci & Engn, 100,Pingleyuan St, Beijing 100124, Peoples R China
  • [ 2 ] [Zhang, Qijun]Beijing Univ Technol, Coll Mat Sci & Engn, 100,Pingleyuan St, Beijing 100124, Peoples R China
  • [ 3 ] [Li, Guanjun]Beijing Univ Technol, Coll Mat Sci & Engn, 100,Pingleyuan St, Beijing 100124, Peoples R China
  • [ 4 ] [Zhang, Xiaoguang]Beijing Univ Technol, Coll Mat Sci & Engn, 100,Pingleyuan St, Beijing 100124, Peoples R China
  • [ 5 ] [Pan, De'an]Beijing Univ Technol, Coll Mat Sci & Engn, 100,Pingleyuan St, Beijing 100124, Peoples R China
  • [ 6 ] [Zhao, Hang]Beijing Univ Technol, Fac Mat & Mfg, 100,Pingleyuan St, Beijing 100124, Peoples R China
  • [ 7 ] [Zhang, Qijun]Beijing Univ Technol, Fac Mat & Mfg, 100,Pingleyuan St, Beijing 100124, Peoples R China
  • [ 8 ] [Li, Guanjun]Beijing Univ Technol, Fac Mat & Mfg, 100,Pingleyuan St, Beijing 100124, Peoples R China
  • [ 9 ] [Zhang, Xiaoguang]Beijing Univ Technol, Fac Mat & Mfg, 100,Pingleyuan St, Beijing 100124, Peoples R China
  • [ 10 ] [Pan, De'an]Beijing Univ Technol, Fac Mat & Mfg, 100,Pingleyuan St, Beijing 100124, Peoples R China

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Source :

SEPARATION AND PURIFICATION TECHNOLOGY

ISSN: 1383-5866

Year: 2023

Volume: 320

8 . 6 0 0

JCR@2022

ESI Discipline: CHEMISTRY;

ESI HC Threshold:20

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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