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首页> 外文期刊>Journal of King Saud University >Modification of commercial activated carbon for the removal of 2,4-dichlorophenol from simulated wastewater
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Modification of commercial activated carbon for the removal of 2,4-dichlorophenol from simulated wastewater

机译：改性工业活性炭以从模拟废水中去除2,4-二氯苯酚

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In this study, modification of commercial activated carbon (AC) has been examined for the removal of 2,4-dichlorophenol (2,4-DCP) from aqueous solutions. The modified process involves impregnation of phosphoric acid at ratios of 0.6–2.4 followed by 500 °C and 700 °C for 2 h. The effect of different impregnation ratios and activation temperatures was studied. Physical and chemical characterization of modified AC was conducted including percentage yield, moisture content, ash content, pH, morphology study and functional groups. The adsorption of 2,4-DCP by modified AC was also investigated. Various tests were conducted on the unmodified AC and chemically modified AC at different contact times (5–60 min) and adsorbent dosages (0.1–0.9 g). Results revealed that the modified AC (AC2) prepared with impregnation ratio, X p value of 1.2 at 500 °C for 2 h was found to have the highest percentage removal of 2,4-DCP (50 ppm), which is 93.63%. The modified AC showed better capability to adsorb 2,4-DCP from aqueous solutions, the percentage removal was improved to 20.40%. Elovich and intraparticle diffusion kinetic models were used to test the adsorption kinetics. The adsorption of 2,4-DCP proved to fit better in the intraparticle diffusion model compared to Elovich equation. The mechanism of the adsorption process was determined by the intraparticle model.
机译：在这项研究中，已经研究了商业活性炭（AC）的改性以从水溶液中去除2,4-二氯苯酚（2,4-DCP）。改进的过程包括以0.6–2.4的比例浸渍磷酸，然后在500°C和700°C下浸渍2 h。研究了不同浸渍率和活化温度的影响。进行了改性AC的物理和化学表征，包括百分产率，水分，灰分，pH，形态研究和官能团。还研究了改性AC对2，4-DCP的吸附。对未改性的AC和化学改性的AC在不同的接触时间（5-60分钟）和吸附剂剂量（0.1-0.9 g）下进行了各种测试。结果显示，以500℃下2 h的X p值为1.2的浸渍率制备的改性AC（AC2）具有最高的2,4-DCP去除率（50 ppm），为93.63％。改性的AC显示出更好的从水溶液中吸附2，4-DCP的能力，去除率提高到20.40％。使用Elovich和颗粒内扩散动力学模型测试吸附动力学。与Elovich方程相比，证明了2,4-DCP的吸附更适合颗粒内扩散模型。吸附过程的机理由颗粒内模型确定。

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