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首页> 外文期刊>Separation and Purification Technology >Removal and recovery of Cu(II), Cd(II) and Pb(II) ions from single and multimetal systems by batch and column operation on neem oil cake (NOC)
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Removal and recovery of Cu(II), Cd(II) and Pb(II) ions from single and multimetal systems by batch and column operation on neem oil cake (NOC)

机译：在印度em油饼上通过分批和柱操作从单金属和多金属系统中去除和回收Cu（II），Cd（II）和Pb（II）离子

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摘要

NOC, a byproduct obtained after extraction of oil from neem fruit was used as an adsorbent for the removal of Pb(II) from wastewater. The adsorption of Pb(II) was found to be maximum (98%) at pH 4. The lower value of Langmuir constant (b) indicates strong binding of Pb(II) on NOC surface. The Freundlich constant n indicates beneficial adsorption. Thermodynamic parameters (DELTA H° and DELTA G°) suggest endothermic and spontaneous process. Kinetic studies show better applicability of second order kinetic model. The practical utility of NOC was demonstrated by removing Pb(II) along with Cd(II) and Cu(II) from single metal and multimetal systems by batch and column process. It was found that removal efficiency of NOC was better by column operation in multimetal system. The breakthrough capacities of Cu(II), Cd(II) and Pb(II) on NOC are found to be 10, 15 and 30 mg/g, respectively.
机译：从印，果实中提取油后获得的副产物NOC用作吸附剂，用于从废水中去除Pb（II）。发现在pH 4时，Pb（II）的吸附最大（98％）。Langmuir常数（b）的值越低，表明Pb（II）在NOC表面的牢固结合。 Freundlich常数n表示有益的吸附。热力学参数（ΔH°和ΔG°）表明吸热和自发过程。动力学研究表明二阶动力学模型具有更好的适用性。通过分批和柱处理从单金属和多金属系统中去除Pb（II）以及Cd（II）和Cu（II）证明了NOC的实用性。发现在多金属系统中，通过塔操作，NOC的去除效果更好。发现在NOC上的Cu（II），Cd（II）和Pb（II）的穿透能力分别为10、15和30 mg / g。

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