Mechanism and Kinetics for Copper Leaching by Complexing with Lysine Bearing Two Amino Groups DOI

Mengying Li,

Qingliang Wang, Weijie Guo

и другие.

Langmuir, Год журнала: 2025, Номер unknown

Опубликована: Апрель 15, 2025

In order to overcome the environmental problems associated with ammonia volatilization during leaching process, effects of copper by amino acids various numbers and substitution positions functional groups were systematically studied. The results showed that lysine had best efficiency for copper. When concentration was 0.2 mol/L, temperature 20 °C, molar ratio 3.88, stirring speed 250 rpm, pH 10, time 14 h, rate reached 99%. containing smelting slag has an excellent effect on selective kinetic indicated rate-limiting step process is controlled interfacial chemical reaction, apparent activation energy 64.8 kJ/mol. Fourier transform infrared spectroscopy (FT-IR) X-ray photoelectron (XPS) analyses confirmed COO- -NH in can form complexes ions. Compared conventional methods, this approach not only achieves environmentally benign disposal heavy metal pollutants but also provides a novel strategy green recovery valuable metals from secondary resources.

Язык: Английский

Mechanism and Kinetics for Copper Leaching by Complexing with Lysine Bearing Two Amino Groups DOI

Mengying Li,

Qingliang Wang, Weijie Guo

и другие.

Langmuir, Год журнала: 2025, Номер unknown

Опубликована: Апрель 15, 2025

In order to overcome the environmental problems associated with ammonia volatilization during leaching process, effects of copper by amino acids various numbers and substitution positions functional groups were systematically studied. The results showed that lysine had best efficiency for copper. When concentration was 0.2 mol/L, temperature 20 °C, molar ratio 3.88, stirring speed 250 rpm, pH 10, time 14 h, rate reached 99%. containing smelting slag has an excellent effect on selective kinetic indicated rate-limiting step process is controlled interfacial chemical reaction, apparent activation energy 64.8 kJ/mol. Fourier transform infrared spectroscopy (FT-IR) X-ray photoelectron (XPS) analyses confirmed COO- -NH in can form complexes ions. Compared conventional methods, this approach not only achieves environmentally benign disposal heavy metal pollutants but also provides a novel strategy green recovery valuable metals from secondary resources.

Язык: Английский

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