TY - JOUR
T1 - Simultaneous recovery of Cu2O and FeOOH from wastewater contaminated with mixed metals using fluidized-bed crystallization
AU - Mahasti, Nicolaus N.N.
AU - Lin, Jui Yen
AU - Shih, Yu Jen
AU - Huang, Yao Hui
N1 - Funding Information:
The authors would like to thank to the Ministry of Science and Technology , Taiwan, for the financial support under contract no. MOST 107-2221-E-006-004-MY3 .
Publisher Copyright:
© 2022 Elsevier Ltd.
PY - 2022/6
Y1 - 2022/6
N2 - 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.
AB - 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.
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U2 - 10.1016/j.jece.2022.107357
DO - 10.1016/j.jece.2022.107357
M3 - Article
AN - SCOPUS:85125776832
SN - 2213-3437
VL - 10
JO - Journal of Environmental Chemical Engineering
JF - Journal of Environmental Chemical Engineering
IS - 3
M1 - 107357
ER -