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首页> 外文期刊>Journal Of The South African Institute Of Mining & Metallurgy >Evaluation of chromium (VI) removal by carbons derived from Sesamum indkum oil cake
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Evaluation of chromium (VI) removal by carbons derived from Sesamum indkum oil cake

机译：碳铬（VI）衍生自Sesamum Indkum油蛋糕的铬（VI）的评价

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摘要

Activated carbons were prepared from gingelly oil cake (GOC) by thermal, sulpuric acid, and zinc chloride activation methods and their Cr(VI) removal capacities compared with that of commercial activated carbon (CAC). The effect of experimental parameters such as pH, initial Cr(VI) concentration, contact time, and adsorbent dose for Cr(VI) removal were studied. Langmuir and Freundlich models were tested to describe the equilibrium isotherms. The maximum adsorption capacities of the adsorbents calculated from Langmuir isotherm were found to be 88.68 mg/g, 109.89 mg/g, 101.01 mg/g, and 84.03 mg/g for thermal activated (TAGOC), sulphuric acid treated (STGOC), zinc chloride treated GOC (ZTGOC), and CAC respectively. R2 values show that both Langmuir and Freundlich models fit well to explain the adsorption by TAGOC, STGOC, ZTGOC, and CAC. The kinetic data fits best to a pseudo second-order model. The studies demonstrated effective removal of Cr(VI) from chrome plating wastewater.
机译：与商业活性炭（CAC）相比，通过热，磺酸和氯化锌激活方法及其CR（VI）去除能力从Gingelly油饼（Goc）制备活性炭。 研究了实验参数如pH，初始Cr（VI）浓度，接触时间和吸附剂量的CR（VI）去除的影响。 Rangmuir和Freundlich模型进行了测试以描述平衡等温。 从朗米尔等温线计算的吸附剂的最大吸附容量为88.68mg / g，109.89mg / g，101.01mg / g和84.03mg / g，用于热活化（tagoc），硫酸处理（stgoc），锌 氯化物处理的GOC（ZTGOC）和CAC。 R2值表明，Langmuir和Freundlich模型都适合解释Tagoc，STGOC，ZTGOC和CAC的吸附。 动力学数据最适合伪二阶模型。 研究表明，从镀铬废水中有效地去除Cr（VI）。

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