| Title: | Synthesis of CoNi-layered double hydroxide on graphene oxide as adsorbent and construction of detection method for taste and odor compounds in smelling water |
| Author(s): | Zhong M; Lao Z; Tan J; Yu G; Liu Y; Liang Y; |
| Address: | "School of Chemistry, South China Normal University, Guangzhou 510631, PR China. Gaoming Water Supply Co., Ltd. of Foshan Water Industry Group, Foshan 528000, PR China. Guangdong Centre for Agricultural Products Quality and Safety, Guangzhou 510631, PR China. Electronic address: 1025326418@qq.com. School of Chemistry, South China Normal University, Guangzhou 510631, PR China. Electronic address: liangy@scnu.edu.cn" |
| DOI: | 10.1016/j.jhazmat.2022.128227 |
| ISSN/ISBN: | 1873-3336 (Electronic) 0304-3894 (Linking) |
| Abstract: | "Taste and odor (T&O) compounds are important water pollutant, some of which are toxic. The relevant studies are all expand upon the well-known T&O compounds but for the unknown odors in smelling water. In this work, a method combining purge and trap with gas chromatograph-mass spectrometer (PT-GC/MS) and disperse solid-phase extraction with gas chromatograph (GC) was first proposed to detect T&O compounds in unknown odorous water accurately. Firstly, PT-GC/MS was used for a qualitative test on unknown odors in smelling water and determine the analytes. The hollow CoNi-layered double hydroxide (LDH) on graphene oxide (GO) was then used as a composite adsorbent to pretreat the water, in which the GO provided large specific surface, and the LDH worked as a confinement cavity to enhance capture and retention capacity for volatile organic compounds (VOCs). According to the properties of T&O compounds determined by PT-GC/MS in water, a corresponding GC method was established for accurately quantitative analysis. In this paper, five T&O compounds were detected simultaneously, including dimethyl sulfide, meistylene, N, N-dimethylbenzylamine, 2, 4-dimethylbenzaldehyde and 2, 4-di-tert-butylphenol. Extraction parameters were optimized, including ratio of desorption solvent, amount of adsorbent, pH value, etc. Under the optimal conditions, the detection limits for analysis were 1.14 mug/L to 3.07 mg/L. The satisfactory recoveries were 94-98%. Furthermore, two optimal determination outcomes of odor waters from different places support the practicability of the method, which is expected to be widely used in the detection of unknown odors in smelling water" |
| Keywords: | Animals *Conus Snail Gas Chromatography-Mass Spectrometry Graphite Hydroxides *Odorants/analysis Taste Water CoNi-LDH@GO Detection Dispersive solid-phase extraction Gc Pt-gc/ms Taste and odor compounds Unknown odorous water; |
| Notes: | "MedlineZhong, Mingmin Lao, Zhixiong Tan, Jianrong Yu, Guangzhou Liu, Yan Liang, Yong eng Research Support, Non-U.S. Gov't Netherlands 2022/01/15 J Hazard Mater. 2022 Apr 15; 428:128227. doi: 10.1016/j.jhazmat.2022.128227. Epub 2022 Jan 7" |
