Effects of CO32-and OH- on the solubility, metastable zone width and nucleation kinetics of borax decahydrate

被引：12
作者：
Chen, Jing [1 ,2 ,3 ]
Peng, Jiaoyu [1 ,2 ]
Wang, Xingpeng [1 ,2 ,3 ]
Dong, Yaping [1 ,2 ]
Li, Wu [1 ,2 ]
机构：
[1] Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Comprehens & Highly Efficient Utilizat Sa, Xining 810008, Qinghai, Peoples R China
[2] Engn & Technol Res Ctr Comprehens Utilizat Salt L, Xining 810008, Qinghai, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100039, Peoples R China
来源：
ROYAL SOCIETY OPEN SCIENCE | 2019年 / 6卷 / 06期
基金：
国家重点研发计划;
关键词：
metastable zone width; solubility; nucleation kinetics; borax; BORIC-ACID; IMPURITIES; LAKES;
D O I：
10.1098/rsos.181862
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Measurements of the solubility and metastable zone width (MZW) of borax decahydrate in sodium carbonate and sodium hydroxide aqueous were obtained. The onsets of nucleation were detected by the turbidity technique with the temperature range from 285 to 315 K. The results showed that the solubility of borax gradually decreased and the MZW broadened with the mass percentage of sodium carbonate increasing from 0% up to 9.22%. Correspondingly, the solubility and MZW had the same trend with the addition of sodium hydroxide. Meanwhile, the nucleation parameters of borax were determined and analysed to explain the trends obtained. Applying the classical three-dimensional nucleation theory approach, it was found that the addition of carbonate and hydroxide ions led to the values of solid-liquid interfacial energy (gamma) increasing, which indicated the CO32- and OH- ions adsorbed on the nuclei but suppressed nucleation rate.
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页数：10
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