文献类型：期刊文献

英文题名：Effects of organic pollutants on struvite crystallization kinetics and the molecular mechanism of inhibition on crystal growth

作者：Yao, Menghui[1];Wang, Lingyu[1];Wei, Jiahao[1];Cen, Zhenkai[1];Wei, Xuemei[4];Yu, Guoqi[4];Shen, Hualiang[4];Shen, Runpu[4];Han, Dandan[1,2,3];Chen, Mingyang[1,2,3];Li, Kangli[1,3];Gong, Junbo[1,2,3]

机构：[1]Tianjin Univ, Sch Chem Engn & Technol, State Key Lab Chem Engn, Tianjin 300072, Peoples R China;[2]Haihe Lab Sustainable Chem Transformat, Tianjin 300192, Peoples R China;[3]Tianjin Univ, Zhejiang Inst, Shaoxing 312300, Zhejiang, Peoples R China;[4]Shaoxing Univ, Zhejiang Engn Res Ctr Fat soluble Vitamin, Shaoxing 312000, Zhejiang, Peoples R China

年份：2023

卷号：894

外文期刊名：SCIENCE OF THE TOTAL ENVIRONMENT

收录：SCI-EXPANDED(收录号：WOS:001038947700001)、、EI(收录号：20232714331096)、Scopus(收录号：2-s2.0-85163423371)、WOS

基金：This work was supported by the Nature Science Foundation of Tianjin (21JCQNJC00580) , Key R & amp;D Program of Zhejiang (2022C01208) , National Science Foundation of China (22108195), key project of State Key Laboratory of Chemical Engineering (SKL-ChE-20Z03) and Opening Project of Zhejiang Engineering Research Center of Fat-soluble Vitamin (202204) . Kangli Li thanks the Shaoxing People's Government for a supporting her post-doctoral research.

语种：英文

外文关键词：Wastewater treatment; Phosphorus recovery; Struvite crystallization; Organic pollutants; Computational chemistry

外文摘要：The abilities of improving phosphorus (P) resources sustainability and reducing water eutrophication make struvite crystallization technology attract increasing interest in wastewater treatment, but struvite crystallization process may be affected by various impurities in wastewater. In this study, the effects of nine representative ionic surfactants including three types (anionic, cationic and zwitterionic) on crystallization kinetics and product quality of struvite were investigated, and the influencing mechanism was further probed. The results demonstrated that anionic surfactants significantly inhibit crystal growth so as to reduce crystal size especially in a-axis direction, change crystal morphology and decrease P recovery efficiency, and also lead to a slight decline in product purity. In contrast, cationic and zwitterionic surfactants have no obvious influence on the formation of struvite. A series of experimental characterizations and molecular simulations collectively revealed that the inhibition of crystal growth by anionic surfactants is attributed to the adsorption of anionic surfactant molecules on struvite crystal surface and subsequent blockage of active growth sites. The binding ability of surfactant molecules with the Mg2+ exposed on struvite crystal surface was highlighted to be the most essential factor determining the adsorption behavior and adsorption capacity. Anionic surfactants with stronger binding ability with Mg2+ have more intense inhibitory effect, but a large molecular volume of anionic surfactants will weaken the adsorption capacity on crystal surface so as to reduce the inhibitory effect. Contrastively, cationic and zwitterion surfactants without binding ability with Mg2+ have no inhibitory effect. These findings enable us to have a clearer understanding of the impact of organic pollutants on struvite crystallization and make a preliminary judgment on the organic pollutants that may have the ability to inhibit the crystal growth of struvite.