Study on Wetland Matrix Performance based on Phosphate Adsorption Characteristics

吴浩; 江成; 桂双林; 曹文平; 李朝明; 彭惠靖

doi:10.16056/j.2096-7705.2022.02.008

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Study on Wetland Matrix Performance based on Phosphate Adsorption Characteristics

更新时间：2026-01-19

- Study on Wetland Matrix Performance based on Phosphate Adsorption Characteristics
- Issue 2, Pages: 42-48(2022)
- 作者机构：
  
  1. 江西省科学院能源研究所
  2. 东华理工大学水资源与环境工程学院
  3. 徐州工程学院环境工程学院
  4. 江苏莲洋港环保科技有限公司
- 作者简介：
- 基金信息：
- DOI：10.16056/j.2096-7705.2022.02.008
  CLC： X703
- Published：2022
- 稿件说明：
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吴浩, 江成, 桂双林, et al. Study on Wetland Matrix Performance based on Phosphate Adsorption Characteristics[J]. 2022, (2): 42-48.
DOI：

吴浩, 江成, 桂双林, et al. Study on Wetland Matrix Performance based on Phosphate Adsorption Characteristics[J]. 2022, (2): 42-48. DOI： 10.16056/j.2096-7705.2022.02.008.

摘要

人工湿地内磷酸根的去除主要依靠基质的吸附作用实现的，因此基质除磷特性研究具有十分重要的作用。选择黄土球与页岩陶粒、无烟煤进行比较试验，结合SEM和XRD表征探究3种基质对磷酸根吸附和解吸性能差异的内在因素。结果表明：黄土球及页岩陶粒、无烟煤对磷酸根的吸附过程均符合Langmuir和Freundlich方程，理论饱和吸附量无烟煤（676.09 mg/kg）>黄土球（544.32 mg/kg）>页岩陶粒（449.23 mg/kg），表明了黄土球具有良好的磷酸盐吸附容量。动力学试验显示，48 h内，黄土球的吸附过程能显著达到平衡状态，Elovich方程和双常数方程对黄土球的吸附动力学过程拟合效果较好，表明其去除磷酸根的过程存在多种吸附方式。试验显示黄土球与页岩陶粒、无烟煤间存在明显的除磷性能差异，同时也证明了黄土球具有潜在的湿地基质应用价值。

Abstract

Phosphorus removal in constructed wetlands mainly depends on the adsorption of the substrate

so the study of phosphorus removal characteristics of the substrate is very important. Loess spheres

shale ceramsite and anthracite were selected for comparative tests. Combined with SEM and XRD characterization

the differences in phosphorus adsorption and desorption properties of the three substrates were analyzed. The results showed that the phosphorus adsorption process of the three substrates accorded with the Langmuir and Freundlich equations. The theoretical saturated adsorption capacity of anthracite（676.09 mg/kg） > loess sphere（544.32 mg/kg） >shale ceramsite（449.23 mg/kg） was calculated by the Langmuir model.Within 48 h

all the three substrates could reach adsorption equilibrium. The kinetic fitting results showed that the Elovich equation and the double constant equation had better fitting effect on the adsorption kinetic process. The results showed that there were significant differences in the phosphorus removal performance among the three substrates

and the loess spheres had potential application value as wetland substrates.

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