文献类型：期刊文献

英文题名：Recovering sodium erythorbate from wastewater through freeze crystallization technology

作者：Chen, Peng[1];Song, Pengfei[2];Wang, Lidong[1];Yan, Ying[1];Liu, Yongdi[1];Zhang, Lehua[1,3]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asse, Shanghai, Peoples R China;[2]Thomas Nelson Community Coll, Div Sci Engn & Technol, Hampton, VA USA;[3]Shanghai Inst Pollut Control & Ecol Secur, Shanghai, Peoples R China

年份：2019

卷号：91

期号：5

起止页码：455

外文期刊名：WATER ENVIRONMENT RESEARCH

收录：;EI(收录号：20201008275150);WOS:【SCI-EXPANDED(收录号:WOS:000464828600009)】；

基金：This work was supported by the National Natural Science Foundation of China (NSFC) (21876050) and the Special Fund from State Key Joint Laboratory of Environment Simulation and Pollution Control (18K10ESPCT).

语种：英文

外文关键词：eutectic freeze crystallization; freeze concentration; sodium erythorbate; sodium sulfate; wastewater treatment

摘要：Eutectic freeze crystallization was developed to recover sodium erythorbate (NaE) from wastewater at pHs 4.1, 5.3, and 6.5. Two substances (A and B) were sequentially recovered from the samples. The recovery rate of substance A was 2.06, 1.83, and 3.03g/L at pHs 4.1, 5.3, and 6.5, respectively; while that of B was 5.51, 3.09, and 3.26 g/L. at the corresponding pHs. The analysis results of the two recovered substances indicated that substance A was mostly Na2SO4 center dot 10H(2)O, while substance B was mainly NaE. Salt recovery was most successful at pH 4.1 with the purity of recovered NaE reaching 87.53 wt%. Moreover, the chemical oxygen demand and electric conductivity of the ice were far smaller than the initial wastewater. The concentration effect was minimal due to the formation of Na2SO4 center dot 10H(2)O and NaE crystals. This combined crystallization strategy can potentially become an economic technology to recover NaE from waste- water. (C) 2018 Water Environment Federation