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Study on degradation of potassium flotation reagent octadecylamine by plasma⁃assisted photocatalysis
Received date: 2024-11-22
Online published: 2026-01-20
The residual flotation reagent octadecylamine（ODA） after potassium fertilizer flotation is directly discharged into the environment with the tailings，which has adverse effects on the stability of the ecosystem in salt lake areas and the high⁃value utilization of downstream high⁃value chemicals.To address this issue，the plasma assisted TiO2 photocatalytic technology was employed to investigate the degradation of ODA aqueous solution.Using the concentration of amine groups in ODA as an evaluation index，the effect of input power，catalyst dosage，and synergistic effect of plasma and photocatalysis on degradation efficiency were investigated through experiments.The changes in O3，H2O2，and ·OH concentrations during the degradation process were studied，and the free radicals generated during the degradation process were detected to elucidate their synergistic degradation mechanism.The experimental results showed that for an ODA solution with an initial concentration of 30 mg/L，the synergistic degradation efficiency was highest when the input power was set to 25 W and the TiO2 dosage was 17 mg，and complete degradation of ODA could be achieved within 12 minutes.Compared with single photocatalysis and plasma catalysis degradation，plasma assisted photocatalysis technology could significantly accelerate the degradation rate of octadecylamine.The synergistic plasma⁃photocatalytic degradation technology demonstrated exceptional efficiency in ODA decomposition，thereby facilitating the diversified，refined，and high⁃value utilization of salt lake resources.
Key words： plasma; photocatalysis; titanium dioxide; floatation agents; octadecylamine
LI Xuri , MA Liang , ZHANG Siyuan , LIU Haining , CUI Xiangmei , YE Xiushen . Study on degradation of potassium flotation reagent octadecylamine by plasma⁃assisted photocatalysis[J]. Inorganic Chemicals Industry, 2026 , 58(1) : 107 -114 . DOI: 10.19964/j.issn.1006-4990.2024-0627
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