棕榈仁壳作为有效的吸附剂，用于处理重金属污染的水。,Scientific Reports

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棕榈仁壳作为有效的吸附剂，用于处理重金属污染的水。
Scientific Reports ( IF 3.8 ) Pub Date : 2019-12-12 , DOI: 10.1038/s41598-019-55099-6
Rabia Baby _{1,

2} , Bullo Saifullah ₁ , Mohd Zobir Hussein ₁

Affiliation

水中的重金属污染会对人体健康造成严重的不利影响。每年，油棕种植园都会产生数百万吨的果壳废料。在这项研究中，一种农业废料棕榈油仁壳（PKS）被用作去除重金属的有效吸附剂，即：水中的Cr6 +，Pb2 +，Cd2 +和Zn2 +。不同的吸附参数；优化了溶液的pH，吸附剂用量，金属离子浓度和接触时间。发现PKS可有效地从水中吸附重金属离子Cr6 +，Pb2 +，Cd2 +和Zn2 +，去除率分别为98.92％，99.01％，84.23％和83.45％。Cr6 +，Pb2 +，Cd2 +和Zn2 +的吸附容量分别为49.65 mg / g，43.12 mg / g，49.62 mg / g和41.72 mg / g。使用不同的动力学模型（如拟一阶，拟二阶和抛物线扩散模型）确定每种金属离子的吸附过程动力学。对于每个金属离子，伪二阶模型与相关系数R2 = 0.999拟合得很好。使用不同的等温模型，即Freundlich和Langmuir，确定金属离子与PKS之间的吸附相互作用。还确定了每种金属离子的吸附能力。发现PKS是用于处理重金属污染水的非常有效的吸附剂，并且需要两个小时的短时间才能最大程度地吸附。这是一项综合研究，几乎对吸附的所有参数都进行了详细研究。

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Palm Kernel Shell as an effective adsorbent for the treatment of heavy metal contaminated water.

Heavy metal contamination in water causes severe adverse effects on human health. Millions of tons of kernel shell are produced as waste from oil palm plantation every year. In this study, palm oil kernel shell (PKS), an agricultural waste is utilized as effective adsorbent for the removal of heavy metals, namely; Cr6+, Pb2+, Cd2+ and Zn2+ from water. Different parameters of adsorptions; solution pH, adsorbent dosage, metal ions concentration and contact time were optimized. The PKS was found to be effective in the adsorption of heavy metal ions Cr6+, Pb2+, Cd2+ and Zn2+ from water with percentage removal of 98.92%, 99.01%, 84.23% and 83.45%, respectively. The adsorption capacities for Cr6+, Pb2+, Cd2+ and Zn2+ were found to be 49.65 mg/g, 43.12 mg/g, 49.62 mg/g and 41.72 mg/g respectively. Kinetics of adsorption process were determined for each metal ion using different kinetic models like the pseudo-first order, pseudo-second order and parabolic diffusion models. For each metal ion the pseudo-second order model fitted well with correlation coefficient, R2 = 0.999. Different isotherm models, namely Freundlich and Langmuir were applied for the determination of adsorption interaction between metal ions and PKS. Adsorption capacity was also determined for each of the metal ions. PKS was found to be very effective adsorbent for the treatment of heavy metal contaminated water and short time of two hours is required for maximum adsorption. This is a comprehensive study almost all the parameters of adsorptions were studied in detail. This is a cost effective and greener approach to utilize the agricultural waste without any chemical treatment, making it user friendly adsorbent.

更新日期：2019-12-13

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