title: Adsorption of cadmium ions by wheat bran treated with pectinase.
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.
authors: Faculty of Pharmacy, Kinki University, Higashi-Osaka, Osaka 577–8502, Japan.
authors: Fumihiko
authors: F
authors: Ogata
authors: Hisato
authors: H
authors: Tominaga
authors: Moe
authors: M
authors: Kangawa
authors: Naohito
authors: N
authors: Kawasaki
mesh_terms: D000327:Adsorption; D002104:Cadmium / Q000737:chemistry*; D004043:Dietary Fiber / Q000032:analysis / Q000378:metabolism*; D007477:Ions / Q000737:chemistry; D011096:Polygalacturonase / Q000378:metabolism*; D016062:Porosity; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D004043:Dietary Fiber; D007477:Ions; D014874:Water Pollutants, Chemical; D002104:Cadmium; D011096:Polygalacturonase