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首页> 外文期刊>Journal of environmental science and health >KOH modified Thevetia peruviana shell activated carbon for sorption of dimethoate from aqueous solution
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KOH modified Thevetia peruviana shell activated carbon for sorption of dimethoate from aqueous solution

机译：KOH修饰的Thevetia peruviana壳活性炭，用于从水溶液中吸附乐果

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Modified Thevetia peruviana shell activated carbon for sorption of dimethoate from aqueous solution derived with potassium hydroxide (KOH) was studied at different concentrations for its potential application in water treatment. The batch sorption was investigated using dimethoate solution of 10-100 mg/L concentrations. Proximate analysis was determined and changes on the surfaces and structure of the TPS were characterized after chemical activation with KOH using XRD, FTIR, SEM-EDAX, pH(pzc), BET. The quantum chemical calculation for dimethoate yielded molecule associated energies of -9.8421 (HOMO) and -2.3879 (LUMO) and a total energy of -53,376.2. The kinetic of the sorption was modeled which indicated the sorption equilibrium time as 90 min and pseudo-first order kinetics model showing R-2 = 0.994 provided a better description of the process. Analysis of sorption equilibrium revealed that the data fitted well to Freundlich sorption isotherm model (R-2 = 0.966), indicating multi-layer sorption of dimethoate on the surface of sorbent. The sorption of dimethoate onto KOHTPS shows 92.60% removal efficiency.
机译：研究了不同浓度的改性Thevetia peruviana壳活性炭用于从氢氧化钾（KOH）衍生的水溶液中吸附乐果的潜力，以探讨其在水处理中的潜在应用。使用10-100 mg / L浓度的乐果溶液研究间歇吸附。在XOH，FTIR，SEM-EDAX，pH（pzc），BET和KOH对KOH进行化学活化后，确定了接近的分析并表征了TPS表面和结构的变化。乐果的量子化学计算产生的分子相关能为-9.8421（HOMO）和-2.3879（LUMO），总能量为-53,376.2。对吸附动力学进行了建模，表明吸附平衡时间为90分钟，伪一级动力学模型的R-2 = 0.994提供了对该过程的更好描述。吸附平衡分析表明，该数据非常适合Freundlich吸附等温线模型（R-2 = 0.966），表明乐果在吸附剂表面有多层吸附。乐果在KOHTPS上的吸附显示出92.60％的去除效率。

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