TY - JOUR
T1 - Chloride recovery and simultaneous CO2 mineralization from rare earths high salinity wastewater by the Reaction-extraction-crystallization process
AU - Yao, Jiashu
AU - Ran, Jianfeng
AU - Srinivasakannan, C.
AU - Li, Tingting
AU - Li, Yali
AU - Li, Shiwei
AU - Yin, Shaohua
AU - Zhang, Libo
N1 - Funding Information:
Financial aid from the following programs is gratefully acknowledged: National Natural Science Foundational of China (Grant No. 52264051) and Yunnan Ten Thousand Talents Plan Young & Elite Talents Project (YNWR-QNBJ-2018-323).
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2023/1/1
Y1 - 2023/1/1
N2 - A novel route for recovery chloride from rare earths high salinity wastewater has proposed, which is based on a reaction-extraction-crystallization process using Trioctylamine (TOA)-isooctanol as the extraction system when CO2 is mineralized concurrently. Under the optimum conditions, 91.04 % chloride can be transferred to the organic phase with the formation of calcium carbonate which can be used in saponification. Extraction mechanism is analyzed by saturated method and Fourier transform infrared spectrometer (FT-IR), and indicates that the ratio of stoichiometric coefficients between TOA and HCl is affirmed as 1, in accordance with the results by Density Functional Theory (DFT) analysis. Further, the loaded organic phase is stripped with 1 mol/L NaOH solution under the phase ratio (O/A) of 4:1, and the chloride in the stripping solution is concentrated to 100 g/L by five times accumulation, which is conductive to form NaCl crystal by salting-out. The process provides a low-energy-consuming, green, environmentally friendly way for high salinity wastewater treatment and carbon capture, utilization, and storage (CCUS).
AB - A novel route for recovery chloride from rare earths high salinity wastewater has proposed, which is based on a reaction-extraction-crystallization process using Trioctylamine (TOA)-isooctanol as the extraction system when CO2 is mineralized concurrently. Under the optimum conditions, 91.04 % chloride can be transferred to the organic phase with the formation of calcium carbonate which can be used in saponification. Extraction mechanism is analyzed by saturated method and Fourier transform infrared spectrometer (FT-IR), and indicates that the ratio of stoichiometric coefficients between TOA and HCl is affirmed as 1, in accordance with the results by Density Functional Theory (DFT) analysis. Further, the loaded organic phase is stripped with 1 mol/L NaOH solution under the phase ratio (O/A) of 4:1, and the chloride in the stripping solution is concentrated to 100 g/L by five times accumulation, which is conductive to form NaCl crystal by salting-out. The process provides a low-energy-consuming, green, environmentally friendly way for high salinity wastewater treatment and carbon capture, utilization, and storage (CCUS).
KW - Chloride
KW - Reaction-extraction-crystallization
KW - TOA
UR - http://www.scopus.com/inward/record.url?scp=85143268428&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2022.140620
DO - 10.1016/j.cej.2022.140620
M3 - Article
AN - SCOPUS:85143268428
SN - 1385-8947
VL - 455
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 140620
ER -