TY - JOUR
T1 - Preparation of long-flame coal flotation collector from waste cooking oil
AU - Zhang, Mengni
AU - Cheng, Gan
AU - Lu, Yang
AU - Cao, Yijun
AU - Lau, Ee Von
N1 - Funding Information:
This work was supported by the following: “ Foundation for University Key Teacher by Henan Province, China ” (Grant No. 2020GGJS051 ); “ Key Scientific and Technological Project of Henan Province, China ” (Grant No. 232102321134 , 222102320284 ); “Guizhou Key Laboratory of Coal Clean Utilization, China” (Grant No. [2020]2001); “Open Foundation of State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control, China” (Grant No. HB202201 ); “College Students' Innovative Entrepreneurial Training Plan Program, China” (Grant No. 202310460076 ); and “The Henan Polytechnic University Science Fund for Distinguished Young Scholars, China” (Grant No. J2021-1 ).
Publisher Copyright:
© 2023 Elsevier Ltd
PY - 2023/11
Y1 - 2023/11
N2 - There is currently a need to develop efficient and environmentally friendly (green) collectors to improve the poor flotation performance of long-flame coal (LFC) due to its vast porosity and high oxidation degree. Herewith, this study introduces ozone (O3) and ultraviolet (UV) oxidation methods to modify waste cooking oil collector (WCOC) and analyzes their effects on the LFC flotation performance. Furthermore, the separation efficiency (SE) of WCOC, O3-WCOC, UV-WCOC and common collectors (diesel, kerosene, DEP) were compared. Fourier Transform Infrared Spectroscopy (FTIR) and Gas chromatography-mass spectrometry (GC–MS) were used to observe the effects of O3 and UV oxidation on WCOC functional groups and chemical composition. The functional groups and wettability changes of LFC treated via common collectors, including WCOC, O3-WCOC and UV-WCOC adsorption were analyzed. Results revealed that a shorter O3 oxidation time resulted in better flotation performance and higher SE compared to UV oxidation. After O3 (5 min) and UV (9 h) oxidations, C[sbnd]H bonds in WCOC were oxidized and the content of oxygen-containing functional groups (particularly –OH) increased to 4.25% and 4.93% from 0.79%, respectively. Compared to common collectors, O3-WCOC and UV-WCOC demonstrated better reactions with oxygen-containing functional groups (especially O = C[sbnd]O and C[sbnd]O) on the LFC surface. This phenomenon led to a substantial increase in contact angle. This novel oxidation method could potentially be applied in wastewater treatment, mineral processing, and other fields.
AB - There is currently a need to develop efficient and environmentally friendly (green) collectors to improve the poor flotation performance of long-flame coal (LFC) due to its vast porosity and high oxidation degree. Herewith, this study introduces ozone (O3) and ultraviolet (UV) oxidation methods to modify waste cooking oil collector (WCOC) and analyzes their effects on the LFC flotation performance. Furthermore, the separation efficiency (SE) of WCOC, O3-WCOC, UV-WCOC and common collectors (diesel, kerosene, DEP) were compared. Fourier Transform Infrared Spectroscopy (FTIR) and Gas chromatography-mass spectrometry (GC–MS) were used to observe the effects of O3 and UV oxidation on WCOC functional groups and chemical composition. The functional groups and wettability changes of LFC treated via common collectors, including WCOC, O3-WCOC and UV-WCOC adsorption were analyzed. Results revealed that a shorter O3 oxidation time resulted in better flotation performance and higher SE compared to UV oxidation. After O3 (5 min) and UV (9 h) oxidations, C[sbnd]H bonds in WCOC were oxidized and the content of oxygen-containing functional groups (particularly –OH) increased to 4.25% and 4.93% from 0.79%, respectively. Compared to common collectors, O3-WCOC and UV-WCOC demonstrated better reactions with oxygen-containing functional groups (especially O = C[sbnd]O and C[sbnd]O) on the LFC surface. This phenomenon led to a substantial increase in contact angle. This novel oxidation method could potentially be applied in wastewater treatment, mineral processing, and other fields.
KW - Collector
KW - Flotation
KW - Low-rank coal
KW - Oxidation
KW - Waste cooking oil
UR - http://www.scopus.com/inward/record.url?scp=85167518546&partnerID=8YFLogxK
U2 - 10.1016/j.mineng.2023.108296
DO - 10.1016/j.mineng.2023.108296
M3 - Article
AN - SCOPUS:85167518546
SN - 0892-6875
VL - 202
JO - Minerals Engineering
JF - Minerals Engineering
M1 - 108296
ER -