黄土絮凝剂对沙湖水质净化及溶解性有机质的去除

彭雨瑶; 李攀武; 高晓波; 于会彬; 郭旭晶

doi:10.13205/j.hjgc.202305019

黄土絮凝剂对沙湖水质净化及溶解性有机质的去除

doi: 10.13205/j.hjgc.202305019

1. 成都信息工程大学资源环境学院, 成都 610225;
2. 中国环境科学研究院流域水环境污染综合治理研究中心, 北京 100012;
3. 宁夏环境科学研究院, 银川 750001

基金项目:

四川省科技重大专项(2018SZDZX0024)

国家自然科学基金项目(41503110)

详细信息

作者简介:
彭雨瑶(1998-),女,硕士研究生,主要从事DOM的环境化学行为研究。779096410@qq.com

通讯作者:
郭旭晶(1980-),男,博士,研究员,主要从事污染物控制及其环境化学行为研究。guoxj@cuit.edu.cn

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出版历程
- 收稿日期: 2022-04-27

EFFECT OF LOESS FLOCCULANT ON WATER PURIFICATION AND DISSOLVED ORGANIC MATTER REMOVAL IN SHAHU LAKE

1. College of Resources and Environment, Chengdu University of Information Technology, Chengdu 610225, China;
2. Watershed Research Center for Comprehensive Treatment of Water Environmental Pollution, Chinese Research Academy of Environmental Sciences, Beijing 100012, China;
3. Ningxia Research Academy of Environmental Sciences, Yinchuan 750001, China

摘要

摘要: 采用沙湖黄土作为絮凝剂,以硅藻土为参照,探究沙湖黄土对沙湖中水质絮凝净化效果。同时采用同步荧光光谱结合导数荧光、平行因子分析和二维相关光谱分析沙湖黄土对沙湖溶解性有机物(DOM)的净化效果。结果表明:黄土对TN、TP、COD_Mn和Chl.a的最高去除效率分别为28.85%、51.52%、24.87%和42.86%。100目和200目沙湖黄土对TP和TN均具有较好的絮凝效果,而硅藻土仅TN的絮凝效果优于黄土。DOM的平行因子分析(PARAFAC)能够识别5个荧光组分,类蛋白荧光为主要的荧光组分。黄土絮凝剂对类蛋白荧光组分(C5)去除效果最高,为56.38%。二阶导数荧光能够识别出6个荧光峰,类蛋白、类富里酸和类腐植酸物质的去除率分别为48.54%、16.45%和1.43%。二维相关光谱分析结果表明,黄土絮凝剂对荧光有机物的去除次序为285 nm→336 nm→369 nm,类蛋白荧光物质能够优先被去除。因此,沙湖黄土可作为絮凝剂用于净化沙湖水质。
- 沙湖黄土 /
- 絮凝 /
- 水质 /
- 溶解性有机质 /
- 平行因子分析
Abstract: In this study, the loess in Shahu Lake was used as a flocculant to explore the water purification effect of flocculation, with diatomite used as a control group. Meanwhile, the purification effect of loess on dissolved organic matter (DOM) in Shahu Lake water was analyzed by synchronous fluorescence spectroscopy in combination with derivative fluorescence, parallel factor analysis and two-dimensional correlation spectroscopy. The results showed that the highest removal rates of TN, TP, COD_Mn and Chl.a were 28.85%, 51.52%, 24.87% and 42.86%, respectively. Shahu loess with grain sizes of 100, 200 mesh had a better flocculation effect on TP and TN. However, the flocculation effect of diatomite on TN was better than that of the loess. Five fluorescent components were identified in DOM parallel factor analysis (PARAFAC), among which the protein-like component was the dominant one. The loess flocculant had the highest removal effect (56.38%) on the protein-like fluorescent component (C5). The second derivative fluorescence could identify six fluorescence peaks. Among them, the removal rates of protein-, fulvic- and humic-like substances were 48.54%, 16.45% and 1.43%, respectively. The results of the two-dimensional correlation spectroscopy analysis showed that the preferential sequence of removal of the fluorescent components by loess flocculant followed the order of 285 nm→336 nm→369 nm, suggesting that protein-like fluorescent component was removed preferentially. Shahu loess can be used as a flocculant to purify Shahu Lake water.
- Shahu loess /
- flocculation /
- water quality /
- DOM /
- parallel factor analysis

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