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首页> 外文期刊>Journal of Applied Polymer Science >Selective sorption of heavy metal on phosphorylated sago starch-extraction residue
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Selective sorption of heavy metal on phosphorylated sago starch-extraction residue

机译：重金属在磷酸化西米淀粉提取残渣上的选择性吸附

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摘要

The phosphorylated sago starch-extraction residue (P-SR) was produced for the removal of heavy metal from wastewater. The phosphoric ester in the phosphorylated residue was evaluated by means of infrared microspectrometry and solid-state NMR. In this study, the phosphorus contents of produced P-SR, phosphorylated cellulose (P-C), and phosphorylated sago starch were 31.7, 34.2, and 4.6 mg/g, respectively. The phosphorus contents of P-C and sago starch were clearly different because of the difference of each structure. The maximum sorption capacities of heavy metals (cadmium, lead, copper, and zinc) in single heavy metal sorption on P-SR were 0.20, 0.25, 0.36, and 0.24 mmol/g (Cu > Pb > Zn > Cd), respectively. On the other hand, the amount of sorbed heavy metals in coexisted heavy metal sorption on P-SR followed the order of Pb > Cu > Cd > Zn that was different from the relations of maximum sorption capacities for individual heavy metals. The heavy metal sorption behavior in single and coexisted heavy metal solution for P-SR were different and P-SR showed the intrinsic heavy metal sorption affinity, called as selective sorption.
机译：产生了磷酸化的西米淀粉提取残留物（P-SR），用于从废水中去除重金属。通过红外光谱法和固态NMR评估磷酸化残留物中的磷酸酯。在这项研究中，生产的P-SR，磷酸纤维素（P-C）和磷酸西米淀粉的磷含量分别为31.7、34.2和4.6 mg / g。由于每种结构的不同，P-C和西米淀粉的磷含量明显不同。在P-SR上单个重金属吸附中的重金属（镉，铅，铜和锌）的最大吸附容量分别为0.20、0.25、0.36和0.24 mmol / g（Cu> Pb> Zn> Cd）。另一方面，在P-SR上共存的重金属吸附中吸附的重金属量遵循Pb> Cu> Cd> Zn的顺序，这与单个重金属的最大吸附容量的关系不同。 P-SR在单一和共存的重金属溶液中对重金属的吸附行为不同，P-SR显示出内在的重金属吸附亲和力，称为选择性吸附。

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