The behavior and mechanism of toxic Pb(II) removal by nanoscale zero-valent iron-carbon materials based on the oil refining byproducts was written by Shi, Yahui;Cheng, Xiaofan;Wan, Dongjin;Zhang, Zhixiang;Chen, Zhaohui;Han, Xinze;Zhou, Qian. And the article was included in Inorganic Chemistry Communications in 2022.Quality Control of Cuprichydroxide This article mentions the following:
In this study, nanoscale zero-valent iron-carbon materials based on the oil refining byproducts (nZVI-SBE@C) were prepared through anoxic pyrolysis and liquid phase reduction method, and its ability to remove Pb(II) from aqueous solution was tested for the first time. In preparation process, when the mass ratio of C/Fe is 1:2, nZVI-SBE@C has the maximum removal capacity of Pb(II) (182.29 mg/g), which is four times that of SBE@C (51.37 mg/g). In the research of Pb(II) removal behavior, adsorption process by nZVI-SBE@C was fitted well with Langmuir isotherm model and pseudo-second-order kinetic model, and the Langmuir monolayer maximum adsorption capacity of nZVI-SBE@C for Pb(II) was 223.52 mg/g. In the N2 and air initial atm., Pb(II) removal reached 95.37% and 42.37%, resp., which were higher than that in blank control group (24.44%). The promotion order of the coexisting cations for nZVI-SBE@C to remove Pb(II) is: Na+ > K+ > Mg2+ (the effect of NO–3), and the inhibition order is: Cu2+ < Fe3+ < Al3+ (the effect of the solubility products of precipitation as well as ionic radius). Pb(II) removal by nZVI-SBE@C increased with the increase of initial solution pH (2.30-5.80). Though the characterization of the materials before and after the reaction, meanwhile combining with exptl. data, Pb(II) removal mechanisms of nZVI-SBE@C may include surface adsorption, electrostatic attraction, ion exchange, surface complexation and nZVI reduction (small portion). In the experiment, the researchers used many compounds, for example, Cuprichydroxide (cas: 20427-59-2Quality Control of Cuprichydroxide).
Cuprichydroxide (cas: 20427-59-2) belongs to copper catalysts. The applications of Copper-based nanoparticles have received great attention due to the earth-abundant, low toxicity and inexpensive. Copper of different valence states can be used to catalyze the coupling reaction, especially the Ullmann coupling reaction. Quality Control of Cuprichydroxide
Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”