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首页> 外文期刊>Journal of Environmental Chemistry and Ecotoxicology >Removal of heavy metal ions in aqueous solutions using palm fruit fibre as adsorbent
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Removal of heavy metal ions in aqueous solutions using palm fruit fibre as adsorbent

机译：使用棕榈果纤维作为吸附剂去除水溶液中的重金属离子

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The ability of the biomass of palm fruit fiber in removing Pb, Cu, Ni and Cr from aqueous solution was investigated as a function of concentration, contact time and pH variations. Palm fruit fiber from the study locations were washed with deionized water, air-dried and ground using electric grinder. The powdered fiber was sieved and treated with 0.3 M HNO3solution for 24 h, washed with deionized water until pH 7.2 and oven dried at 60°C. The biomass was added to 1 M stock metal ion solutions made from Copper sulphate, Potassium dichromate, Lead nitrate and Nickel sulphate. The concentrations, contact time and pH of each stock solution were varied. The mixtures were shaken, filtered and analyzed by GBC Avanta Atomic Absorption Spectrophotometer version 2.02. The results showed mean percentage recovery of 51.08% Pb, 54.75% Cu, 46.96% Ni and 44.91% Cr for concentrations, 96.96% Pb, 9.79% Cu, 49.21% Ni, and 7.63% Cr for contact time and 87.48% Pb, 82.86% Cu, 56.71% Ni and 37.68% Cr for pH. The application of the biomass to waste water showed percentage removal of 73% Pb, 78% Cr, 82% Cu and 87% Ni. The mean percentage removal value revealed Pb as the highest and Cr as the least adsorbed. The sorption capacity of the biomass decreased with increasing concentration of metal ion but increased with decreasing pH and increasing contact time. Chemical modification of the biomass enhanced its capacity. Thus the palm fruit fiber biomass is cost effective and has great potential for use as adsorbent in removing heavy metals from aqueous solutions.
机译：研究了棕榈果纤维生物质从水溶液中去除Pb，Cu，Ni和Cr的能力，该能力是浓度，接触时间和pH值变化的函​​数。用去离子水洗涤研究地点的棕榈果纤维，风干并使用电磨机研磨。将粉末状的纤维过筛并用0.3 M HNO3溶液处理24小时，用去离子水洗涤至pH 7.2，并在60°C的烘箱中干燥。将生物质添加到由硫酸铜，重铬酸钾，硝酸铅和硫酸镍制成的1 M储备金属离子溶液中。每种储备溶液的浓度，接触时间和pH均不同。将混合物摇动，过滤并通过GBC Avanta 2.02版原子吸收分光光度计进行分析。结果显示浓度的平均回收率为51.08％Pb，54.75％的Cu，46.96％的Ni和44.91％的Cr，接触时间的平均回收率为96.96％的Pb，9.79％的Cu，49.21％的Ni和7.63％的Cr以及87.48％的Pb的为82.86 pH值的％Cu，56.71％Ni和37.68％Cr。将生物质应用于废水显示出73％Pb，78％Cr，82％Cu和87％Ni的去除百分比。平均去除百分比值表明，Pb吸附最高，Cr吸附最少。生物量的吸附能力随着金属离子浓度的增加而降低，但随着pH值的降低和接触时间的增加而增加。生物质的化学改性提高了其容量。因此，棕榈果纤维生物质具有成本效益，并且具有用作从水溶液中去除重金属的吸附剂的巨大潜力。

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