水溶液
核化学
过氧化氢
傅里叶变换红外光谱
草甘膦
纳米颗粒
化学
动态光散射
动力学
响应面法
材料科学
化学工程
色谱法
有机化学
纳米技术
量子力学
生物
物理
工程类
农学
作者
Fan Li,Thomas Shean Yaw Choong,Luqman Chuah Abdullah,Siti Nurul Ain Md. Jamil,Nurul Nazihah Amerhaider Nuar
出处
期刊:Polymers
[MDPI AG]
日期:2023-02-03
卷期号:15 (3): 775-775
被引量:3
标识
DOI:10.3390/polym15030775
摘要
Glyphosate (N-phosphonomethyl glycine) is a non-selective, broad-spectrum organophosphate herbicide. Its omnipresent application with large quantity has made glyphosate as a problematic contaminant in water. Therefore, an effective technology is urgently required to remove glyphosate and its metabolites from water. In this study, calcium peroxide nanoparticles (nCPs) were functioned as an oxidant to produce sufficient hydroxyl free radicals (·OH) with the presence of Fe2+ as a catalyst using a Fenton-based system. The nCPs with small particle size (40.88 nm) and high surface area (28.09 m2/g) were successfully synthesized via a co-precipitation method. The synthesized nCPs were characterized using transform infrared spectroscopy (FTIR), X-ray diffractometry (XRD), Brunauer-Emmett-Teller analysis (BET), dynamic light scattering (DLS), and field emission scanning electron microscopy (FESEM) techniques. Under the given conditions (pH = 3.0, initial nCPs dosage = 0.2 g, Ca2+/Fe2+ molar ratio = 6, the initial glyphosate concentration = 50 mg/L, RT), 99.60% total phosphorus (TP) removal and 75.10% chemical oxygen demand (COD) removal were achieved within 75 min. The degradation process fitted with the Behnajady-Modirshahla-Ghanbery (BMG) kinetics model. The H2O2 release performance and proposed degradation pathways were also reported. The results demonstrated that calcium peroxide nanoparticles are an efficient oxidant for glyphosate removal from aqueous systems.
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