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首页> 外文期刊>Journal of water resource and protection >Potential of Artocarpus heterophyllus Seed Powder in the Adsorption of Chromium(VI) from Aqueous Solution
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Potential of Artocarpus heterophyllus Seed Powder in the Adsorption of Chromium(VI) from Aqueous Solution

机译：Artocarpus heterophyllus种子粉末在水溶液中吸附铬（VI）的潜力

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摘要

The potential of Artocarpus heterophyllus (Jackfruit) seed powder in adsorption of chromium(VI) from aqueous solution was studied using batch technique. The performance of the adsorption process was evaluated against contact time, pH, adsorbent dose, temperature and initial chromium(VI) ion concentration. The influence of the presence of interfering anionic species including chlorides, nitrates and sulphates on the adsorption process was also evaluated. The adsorption of chromium(VI) by Jackfruit seed powder reached equilibrium after 60 minutes. Higher chromium(VI) adsorption was observed at lower pH values with maximum removal (96.05%) occurring at pH 2. A great deal of adsorption (92.53%) was observed at the adsorbent dosage level of 1.0 g/100 ml solution. There was an improvement in the adsorption process when the temperature was increased from 25°C (95.35%) to 60°C (99.56%) followed by a decrease to 98.76% at 70°C. Adsorption decreased with increasing initial chromium(VI) ion concentration. The adsorption followed both Freundlich and Langmuir adsorption models with correlation coefficients of 0.998 and 0.994 respectively, and Q_m of 0.57 mg/g. The presence of nitrate and chloride ions significantly lowered the adsorption, with all the p values < 0.05 at 95% significant level. Meanwhile, the presence of sulphate ions enhanced chromium(VI) adsorption as most of the p values were >0.05. From the obtained Q_m, Jackfruit Seed Powder is a good adsorbent for the aqueous solutions of Cr(VI). The adsorption process is slowed by the presence of the interfering anionic species.
机译：使用批量技术研究了来自水溶液中铬（VI）的吸附中的Artocarpus heterophyllus（菠萝蜜）种子粉末。评估吸附过程的性能，以避免接触时间，pH，吸附剂剂量，温度和初始铬（VI）离子浓度。还评价了干扰阴离子物质在包括氯化物，硝酸盐和硫酸盐上的影响的影响。铬（VI）的吸附在60分钟后通过菠萝蜜种子粉线达到平衡。在较低的pH值下观察到更高的铬（VI）吸附，最大去除（96.05％）在pH2处发生。在吸附剂剂量水平的1.0g / 100ml溶液的吸附剂剂量水平下观察到大量的吸附（92.53％）。当温度从25℃（95.35％）增加到60℃（99.56％）后，吸附过程随后在70℃下减少至98.76％时，吸附过程有所改善。随着初始铬（VI）离子浓度的增加，吸附降低。吸附跟随Freundlich和Langmuir吸附模型，具有0.998和0.994的相关系数，Q_M为0.57 mg / g。硝酸盐和氯离子的存在显着降低了吸附，所有P值为95％显着水平为95％。同时，硫酸根的存在增强的铬（VI）吸附，因为大部分P值> 0.05。从获得的Q_M中，菠萝蜜种子粉是Cr（VI）的水溶液的良好吸附剂。通过干扰阴离子物种的存在减慢了吸附过程。

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