催化作用
化学
三聚氰胺
活性炭
湿式氧化
滴定法
吸附
氨基甲基膦酸
废水
降级(电信)
核化学
氮气
氨
无机化学
废物管理
有机化学
工程类
代谢物
电信
生物化学
计算机科学
作者
Bo Xing,Honglin Chen,Xixiang Zhang
标识
DOI:10.1080/09593330.2017.1310935
摘要
Glyphosate (PMG) wastewater, which is an organic phosphorus (OP) wastewater containing 200-3000 mg/L PMG, was treated via catalytic wet oxidation (CWO) to degrade PMG to orthophosphate ([Formula: see text]). The catalysts were activated carbons (ACs) modified by H2O2 oxidation and thermal treatment with ammonia or melamine. The catalysts were characterized using N2 adsorption/desorption, Boehm titration, and X-ray photoelectron spectroscopy. The CWO experiments were performed in a co-current upflow fixed-bed reactor at 110-130°C and under 1.0 MPa. The AC modified by H2O2 and melamine had the highest catalytic activity and had excellent stability in the continuous 55-day test: 100% PMG removal and over 93% OP removal for different samples of real PMG wastewater. More pyrrolic nitrogen, pyridinic nitrogen, and graphitic nitrogen along with quinone oxygen functional groups on the surface of the AC showed higher catalytic activity according to linear fitting results. The identification and quantification of critical reaction intermediaries and the main end products of PMG degradation were possible, and a degradation pathway was proposed.
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