Simultaneous recovery of Cu2O and FeOOH from wastewater contaminated with mixed metals using fluidized-bed crystallization

Nicolaus N.N. Mahasti, Jui Yen Lin, Yu Jen Shih, Yao Hui Huang

研究成果: Article同行評審

1 引文 斯高帕斯(Scopus)

摘要

The fluidized-bed crystallization (FBC) removes heavy metals onto the fluidized pellets, which is an outstanding alternative to the precipitation method. This study simultaneously recovers iron and copper as binary metal-oxide pellets (FeIII0.66CuI0.33 @SiO2) in a synthetic wastewater using FBC and silica as a seed material. The operating parameters for FBC include the Fe/Cu ratio, pH, cross-sectional loading (L, kg/m2.h) and bed height (H, cm) and these are optimized to maximize the crystallization efficiency of iron and copper. At pH = 8, an input Fe/Cu ratio = 2 at a total metal concentration of 3 mM, the crystallization ratio (CR) and the total respective metal removal (TR) for Fe and Cu is 90% and 99%. Precipitation rates of 0.88 and 0.38 mg-metal/gr-seed•h were obtained at respective cross-sectional loadings of 0.25 kg m-2•h and 0.15 kg m-2•h for Fe and Cu. The crystal phases of FBC product are respectively characterized as FeOOH and Cu2O by XRD analysis. The high crystallization ratio and the recovery of crystal pellet product indicated that the quantity of the sludge has been reduced significantly in comparison to the traditional chemical precipitation.

原文English
文章編號107357
期刊Journal of Environmental Chemical Engineering
10
發行號3
DOIs
出版狀態Published - 2022 6月

All Science Journal Classification (ASJC) codes

  • 化學工程(雜項)
  • 廢物管理和處置
  • 污染
  • 製程化學與技術

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