School of Food and Pharmacy, Zhejiang Ocean University , Zhoushan 316022, P. R. China.
J Agric Food Chem. 2014 Jun 25;62(25):6007-15. doi: 10.1021/jf5015846. Epub 2014 Jun 10.
A novel porous succinylated bioadsorbent was prepared by the partial enzymatic hydrolysis of bamboo (Phyllostachys heterocycla) and its subsequent modification with succinic anhydride. Pb(II) removal from solutions that also contained sodium chloride and an amino acid was investigated using the bioadsorbent. Enzymatic hydrolysis increased the number of accessible hydroxyl groups and surface area of the raw bamboo, and created many pores within the material. The porous succinylated bioadsorbent exhibited high efficiency for Pb(II) binding. The sodium chloride content significantly decreased the Pb(II) adsorption capacity, whereas a minor effect was observed in the presence of arginine. The experimental data could be accurately described by a pseudo-second-order kinetics model, and the adsorption proceeded via an ion exchange mechanism. Even in a solution containing sodium chloride and arginine, the maximum adsorption capacity of Pb(II) by the porous succinylated bioadsorbent was 99.5 mg/g at 303 K.
一种新型多孔琥珀酰化生物吸附剂是通过部分酶解竹子（Phyllostachys heterocycla）和随后用琥珀酸酐修饰制备的。用该生物吸附剂研究了从含有氯化钠和氨基酸的溶液中去除 Pb(II) 的情况。酶解增加了原竹的可及羟基数量和表面积，并在材料内部创造了许多孔。多孔琥珀酰化生物吸附剂对 Pb(II) 具有高效的结合能力。氯化钠含量显著降低了 Pb(II) 的吸附容量，而在存在精氨酸的情况下观察到较小的影响。实验数据可以通过准二级动力学模型准确描述，吸附通过离子交换机制进行。即使在含有氯化钠和精氨酸的溶液中，多孔琥珀酰化生物吸附剂在 303 K 时对 Pb(II) 的最大吸附容量也达到 99.5 mg/g。
