College of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China.
College of Chemistry and Chemical Engineering, Guangxi University for Nationalities, Nanning, 530006, China.
Environ Sci Pollut Res Int. 2020 Dec;27(35):44240-44248. doi: 10.1007/s11356-020-10290-5. Epub 2020 Aug 6.
The removal of residual organics from manganese (Mn) electrochemical solution using combined Fenton oxidation process with adsorption over activated carbon (AC) was investigated. The effect of operating conditions such as dosage of HO, HO/Fe ratio, initial pH value, reaction temperature, and reaction time on Fenton oxidation was studied. Experimental results indicated that a maximum chemical oxygen demand (COD) of 83.2% was obtained under the optimized set of conditions: HO concentration of 0.15 mol/L, HO/Fe molar ratio of 3, initial pH value of 3, reaction temperature of 50 °C, and reaction time of 90 min. The leaching solution was furthered treated over AC and COD removal rate increased to 93.1% under 3.75 g/L dosage of AC, adsorption temperature of 70 °C, and adsorption time of 120 min. The adsorption mechanism of Mn over AC was detailly investigated, while the porous texture of AC was studied by nitrogen adsorption isotherm.
采用 Fenton 氧化法与活性炭（AC）吸附相结合的方法，研究了从锰（Mn）电化学溶液中去除残留有机物的方法。考察了 HO 用量、HO/Fe 摩尔比、初始 pH 值、反应温度和反应时间等操作条件对 Fenton 氧化的影响。实验结果表明，在最佳条件下（HO 浓度为 0.15 mol/L，HO/Fe 摩尔比为 3，初始 pH 值为 3，反应温度为 50°C，反应时间为 90 min），化学需氧量（COD）的最大去除率为 83.2%。将浸出液进一步用 AC 处理，在 3.75 g/L 的 AC 用量、吸附温度为 70°C、吸附时间为 120 min 的条件下，COD 去除率提高到 93.1%。详细研究了 Mn 在 AC 上的吸附机理，并通过氮吸附等温线研究了 AC 的多孔结构。
