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首页> 外文期刊>Journal of Basic and Applied Sciences >Lifescience Global :: Abstract : Biosortion of Cr(VI) from Aqueous Solutions Using Chemically Modified Okra Powder
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Lifescience Global :: Abstract : Biosortion of Cr(VI) from Aqueous Solutions Using Chemically Modified Okra Powder

机译：全球生命科学::摘要：使用化学修饰的秋葵粉​​末从水溶液中分离六价铬（Cr）

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摘要

The main objective of this work was to use the okra powder modified with citric acid as biosorbent for the removal of Cr(VI) from aqueous solutions. Samples of Cr(VI) solution were prepared by diluting the 100 ppm solution diluted from the 1000 ppm stock solution prepared with K2Cr2O7. The determination of Cr(VI) was performed spectrophotometrically by the method of complexation with 1,5-diphenylcarbazide, measuring the absorbance at a 540 nm wavelength. The experiments were conducted at 25 ?± 1 ?°C; 2, 5, 7 and 8 initial pH; 10-240 minutes contact time and 0.05 g of adsorbent. The Freundlich and Langmuir models were used to fit the experimental data. The Freundlich model provided R2=0.9599, indicating adsorption on heterogeneous conditions. Analysis of fluorescence of X-rays, SEM and FTIR were used to prove the okra powder efficiency in the removal of Cr(VI) from aqueous solutions.
机译：这项工作的主要目的是使用柠檬酸修饰的秋葵粉​​作为生物吸附剂，以从水溶液中去除六价铬。通过稀释从用K2Cr2O7制备的1000 ppm储备液中稀释的100 ppm溶液来制备Cr（VI）溶液样品。 Cr（VI）的测定是通过与1,5-二苯基咔嗪络合的方法进行分光光度法的，测量540 nm波长下的吸光度。实验在25±1℃进行。 2、5、7和8的初始pH;接触时间为10-240分钟，吸附剂为0.05克。 Freundlich和Langmuir模型用于拟合实验数据。 Freundlich模型提供的R2 = 0.9599，表明在非均质条件下的吸附。 X射线荧光光谱分析，SEM和FTIR被用来证明秋葵粉从水溶液中去除Cr（VI）的效率。

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