Functionalizing bottom ash from biomass power plant for removing methylene blue from aqueous solution

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Tutkijat

  • Zhanglin Liu
  • Dong Tian
  • Jinguang Hu
  • Fei Shen
  • Lulu Long
  • Yanzong Zhang
  • Gang Yang
  • Yongmei Zeng
  • Jing Zhang
  • Jinsong He
  • Shihuai Deng
  • Yaodong Hu

Organisaatiot

  • Sichuan Agricultural University
  • University of British Columbia

Kuvaus

In order to seek a possible path for utilization bottom ash, the solid waste from biomass incineration for power generation, its basic characteristics were investigated, and removing methylene blue (MB) from aqueous solution was attempted as well. Results indicated bottom ash dominantly contained Si and Ca-related minerals with >35 mineral elements, meanwhile, it was typically characterized by alkalinity (pH of 9.5) and low specific surface area (14.5 m2/g). As the only bottom ash was employed for removing MB, removal efficiency was lower than 44%, however, it was greatly improved to 100% as hydrogen peroxide was supplemented (final concentration of 4.0%). Based on the elucidated mechanisms, Fenton-like reaction was triggered by bottom ash, which was dominantly responsible for removing MB, rather than the adsorption by bottom ash. Besides, increasing reaction temperature and duration dramatically promoted MB removal by bottom ash with the aid of hydrogen peroxide (HBA). A great promotion on MB removal from 92.3 mg/g to 143.9 mg/g was achieved as pH was adjusted from 2.0 to 5.0, indicating MB removal was pH-dependent. The maximum removal of 260.9 mg/g was achieved by HBA at a relatively high initial MB concentration of 2000.0 mg/L, suggesting a great potential in treating dye wastewater by functionalizing bottom ash with the aid of hydrogen peroxide. Moreover, the released heavy metals and derived by-products from MB removal were acceptable in consideration of their potential environmental risks. Thus, the current work offers a new path to valorize the solid waste in biomass electricity generation plant.

Yksityiskohdat

AlkuperäiskieliEnglanti
Sivut760-768
Sivumäärä9
JulkaisuScience of the Total Environment
Vuosikerta634
TilaJulkaistu - 1 syyskuuta 2018
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

ID: 19218235