动态垂直流强化过程中陶粒吸附污染物的特征差异  

Characteristic Differences of Pollutants Adsorbed by Ceramsite in Process of Dynamic Vertical Flow Enhancement

作　　者：邱霖 刘勇 江成[1,3,4] 聂发辉 曹文平[5] QIU Lin;LIU Yong;JIANG Cheng;NIE Fahui;CAO Wenping(Institute of Energy Research,Jiangxi Academy of Sciences,Nanchang 330096,China;School of Civil Engineering and Architecture,East China Jiaotong University,Nanchang 330013,China;Jiangxi Carbon Neutralization Research Center,Nanchang 330096,China;Key Laboratory of Greenhouse Gas Accounting and Carbon Reduction of Jiangxi Province,Nanchang,330096,China;Jiangsu Lianyang Port Environmental Protection Technology Co.,Ltd.,Xuzhou 221003,Jiangsu,China)

机构地区：[1]江西省科学院能源研究所,南昌330096 [2]华东交通大学土木建筑学院,南昌330013 [3]江西省碳中和研究中心,南昌330096 [4]温室气体核算与碳减排江西省重点实验室,南昌330096 [5]江苏莲洋港环保科技有限公司,江苏徐州221003

出　　处：《能源研究与管理》2024年第4期109-117,184,共10页Energy Research and Management

基　　金：江西省科学院基础研究项目(2023YJC2009);江西省科学院包干制试点示范项目(2023YSBG22017,2021YSBG21017);江西省自然基金项目(20242BAB25323)。

摘　　要：为评估不同陶粒作为湿地基质的吸附特征差异和应用价值,选择生物陶粒、页岩陶粒为研究对象,通过静态吸附试验和动态垂直流吸附试验,并结合SEM (扫描电镜)、XRD (X射线衍射)和XPS (X射线光电子能谱)等技术,深入探讨吸附性能与机制。结果显示:1) 2种陶粒均有良好的表面结构和丰富的物相组成,表面均富含金属元素,有其良好的吸附性能。2)在静态吸附试验中,2种陶粒的TP (总磷)理论饱和吸附量均达到较高水平,其中生物陶粒更是高达1 156.43 mg/kg。动力学分析进一步揭示了其吸附过程存在多元化途径。同时,2种陶粒的解吸风险小,长期使用不易造成二次污染。3)动态垂直流试验中,陶粒初期对N、P及有机物均有良好的吸附效果,但随着试验的进行,吸附会出现一定程度的吸附疲态,以页岩陶粒最甚。但去除率仍能维持在50%左右,显示出较好的稳定性和去除效果。基于试验结果和机制分析发现,2种陶粒具有良好的湿地基质应用价值,并有助于改善水质中的DOM (溶解性有机质)组分。To evaluate the distinct adsorption characteristics and application potential of various ceramsites as substrates for wetland systems, this study focused on biological ceramsites and shale ceramsites. Utilizing static adsorption tests anddynamic vertical flow adsorption experiments, complemented by scanning electron microscopy (SEM), X-ray diffraction(XRD), and X-ray photoelectron spectroscopy (XPS), we conducted an in-depth analysis of their adsorption performance andmechanisms. The findings indicate that: 1) Both types of ceramsites possess favorable surface structures and abundant phasecompositions, with metal-rich surfaces that contribute to their superior adsorption capabilities. 2) During the static adsorptiontests, the theoretical saturation adsorption capacity for total phosphorus (TP) was notably high for both ceramsites, with thebiological ceramsite reaching up to 1156.43 mg/kg. Kinetic analysis revealed a variety of adsorption pathways, and bothceramsites exhibited low desorption risks, suggesting they are unlikely to cause secondary pollution even with prolonged use.3) In the dynamic vertical flow tests, ceramsites demonstrated effective adsorption of nitrogen, phosphorus, and organic matterin the initial stages. However, as the tests progressed, a degree of adsorption fatigue became apparent, with shale ceramsiteexperiencing the most severe effects. Nevertheless, the removal rates remained around 50% , indicating good stability andeffectiveness. Based on the experimental outcomes and mechanistic insights, it was determined that both ceramsites arevaluable for wetland matrices and contribute to the improvement of dissolved organic matter (DOM) in water quality.

关 键 词：人工湿地 陶粒 动态垂直流 吸附特征差异 

分 类 号：X703[环境科学与工程—环境工程]