Simultaneous recovery of Cu2O and FeOOH from wastewater contaminated with mixed metals using fluidized-bed crystallization was written by Mahasti, Nicolaus N. N.;Lin, Jui-Yen;Shih, Yu-Jen;Huang, Yao-Hui. And the article was included in Journal of Environmental Chemical Engineering in 2022.Formula: CuH2O2 This article mentions the following:
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 resp. 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 resp. 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 resp. characterized as FeOOH and Cu2O by XRD anal. 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 chem. precipitation In the experiment, the researchers used many compounds, for example, Cuprichydroxide (cas: 20427-59-2Formula: CuH2O2).
Cuprichydroxide (cas: 20427-59-2) belongs to copper catalysts. The applications of Copper-based nanoparticles have received great attention due to the earth-abundant, inexpensive and low toxicity. Copper nanoparticles can catalyze the Ullmann coupling reaction in a wide range of applications.Formula: CuH2O2
Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”