工业水处理 ›› 2025, Vol. 45 ›› Issue (11): 75-82. doi: 10.19965/j.cnki.iwt.2024-0912

• 试验研究 • 上一篇    下一篇

透水混凝土负载BiOBr/g-C3N5光催化去除地表径流中POPs

冯文绘1(), 邹亚峰1, 韩晓勇2   

  1. 1. 河南经贸职业学院,河南 郑州 450000
    2. 河南大学濮阳工学院,河南 濮阳 457000
  • 收稿日期:2025-02-13 出版日期:2025-11-20 发布日期:2025-11-20
  • 作者简介:

    冯文绘(1988— ),讲师,E-mail:

  • 基金资助:
    国家自然科学基金项目(51978437); 河南省科技攻关项目(222102210336)

Photocatalytic removal of POPs in surface runoff by BiOBr/g-C3N5 loaded pervious concrete

Wenhui FENG1(), Yafeng ZOU1, Xiaoyong HAN2   

  1. 1. Henan Institute of Economics and Trade, Zhengzhou 450000, China
    2. Puyang Institute of Technology, Henan University, Puyang 457000, China
  • Received:2025-02-13 Online:2025-11-20 Published:2025-11-20

摘要:

地表径流中持久性有机污染物(POPs)渗入地下造成地下水污染的问题亟待解决。通过溶剂热法制备了溴氧化铋/富氮氮化碳(BiOBr/g-C3N5)复合材料,采用XRD、FT-IR、TEM、UV-vis DRS、PL、EIS和TPC等对复合材料进行了系统的表征分析。以BiOBr/g-C3N5为光催化材料、透水混凝土为载体制备光催化透水混凝土,评价了光催化透水混凝土降解典型POPs对氯苯酚(4-CP)的活性和稳定性,并分析了负载量对光催化透水混凝土光催化性能和透水性能的影响。结果表明:BiOBr/g-C3N5中异质结的构建实现了光生载流子的高效分离,拓宽了光谱吸收范围。可见光照射下,负载质量分数6% BiOBr/g-C3N5的光催化透水混凝土实现了对10 mg/L 4-CP的高效降解,降解率高达91.37%,同时表现出良好的稳定性。随着BiOBr/g-C3N5负载量的增加透水混凝土的透水性能降低,但负载量高达10%时,其透水系数和孔隙率仍然可以满足《透水水泥混凝土路面技术规程》(CJJ/T 135—2009)的要求。光催化透水混凝土在海绵城市建设中具有巨大的应用潜力。

关键词: BiOBr/g-C3N5, 透水混凝土, 对氯苯酚, 光催化

Abstract:

The problem of groundwater pollution caused by the infiltration of persistent organic pollutants(POPs) in surface runoff into the ground needs to be solved urgently. Bismuth oxybromide/nitrogen-rich carbon nitride(BiOBr/g-C3N5) composites were prepared by solvothermal method. The composites were systematically characterized by XRD, FT-IR, TEM, UV-vis DRS, PL, EIS and TPC. Photocatalytic pervious concrete was prepared by using BiOBr/g-C3N5 as photocatalytic material and pervious concrete as carrier. The activity and stability of photocatalytic pervious concrete for photocatalytic degradation of typical POPs p-chlorophenol (4-CP) were evaluated, and the effect of loading amount on the photocatalytic performance and water permeability of photocatalytic pervious concrete was analyzed. The results showed that the construction of heterojunction in BiOBr/g-C3N5 realized the efficient separation of photogenerated carriers and broadened the spectral absorption range. Under visible light irradiation, the photocatalytic permeable concrete loaded with 6% BiOBr/g-C3N5 achieved efficient degradation of 10 mg/L 4-CP, with a degradation rate as high as 91.37%, and showed good stability. With the increase of the loading of BiOBr/g-C3N5, the water permeability of pervious concrete decreased. Even when the loading amount was 10%, the permeability coefficient and porosity could still meet the requirements of Technical Specification for Pervious Cement Concrete Pavement (CJJ/T 135—2009). Photocatalytic permeable concrete has great application potential in the construction of sponge city.

Key words: BiOBr/g-C3N5, pervious concrete, p-chlorophenol, photocatalysis

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