经果胶酶处理的麦麸对镉离子的吸附作用

Adsorption of cadmium ions by wheat bran treated with pectinase.

作者信息

Ogata Fumihiko, Tominaga Hisato, Kangawa Moe, Kawasaki Naohito

机构信息

Faculty of Pharmacy, Kinki University, Higashi-Osaka, Osaka 577–8502, Japan.

出版信息

Chem Pharm Bull (Tokyo). 2011;59(11):1400-2. doi: 10.1248/cpb.59.1400.

DOI:10.1248/cpb.59.1400

PMID:22041078

Abstract

In this study, we investigated the surface properties of raw wheat bran (R-WB) and wheat bran treated with Pectinase PL (P-WB) to evaluating its efficacy for removal of cadmium from waste water. The concentration of cadmium ions adsorbed by them was evaluated. The concentration of carboxyl groups of R-WB (3.56 mmol/g) was greater than that of P-WB (2.11 mmol/g), which indicated that the pectin of R-WB was broken down, resulting in a decrease in the concentration of carboxyl groups due to the enzyme treatment. From the scanning electron microscope (SEM) images of P-WB, the pores were newly generated with enzyme treatment. The concentration of cadmium ions adsorbed onto R-WB was greater than that of cadmium ions adsorbed onto P-WB. These results show that the adsorption mechanism of cadmium ions onto R-WB and P-WB depends on the carboxyl groups of pectin.

摘要

在本研究中，我们研究了生麦麸（R-WB）和用果胶酶PL处理的麦麸（P-WB）的表面性质，以评估其从废水中去除镉的效果。评估了它们吸附的镉离子浓度。R-WB的羧基浓度（3.56 mmol/g）高于P-WB（2.11 mmol/g），这表明R-WB的果胶被分解，由于酶处理导致羧基浓度降低。从P-WB的扫描电子显微镜（SEM）图像可以看出，酶处理后新产生了孔隙。吸附在R-WB上的镉离子浓度大于吸附在P-WB上的镉离子浓度。这些结果表明，镉离子在R-WB和P-WB上的吸附机制取决于果胶的羧基。