Earticle

초록

영어

In this study a new type of biosorbent (PAAE) able to bind anionic metals were developed by surface modification of waste biomass of E. coli with pollyallylamine hydrochloride. The PAAE was used for removal of Pd (II) as chloro-complex from the aqueous solution was investigated. The parameters studied for performance evaluation of PAAE include the solution pH, contact time and initial metal concentration. Result of pH edge experiments showed that as increasing pH, the uptake of Pd (II) was increased at the below pH 5. The isotherm data were fitted with Langmuir isotherm model, showing that maximum uptake was determined to be 265.3 mg/g at pH 3 and 212.9 mg/g at pH 2, respectively. In order to clarify the biosorption kinetics, pseudo-first-order and pseudo-second-order model were applied to fit the kinetic experimental data. Pd (II) biosorption was rapidly happened in first 10 min, and almost achieved equilibrium within 60 min. For the desorption study, 5M HCl, 5M HNO3 and 0.1M thiourea in 1M HCl were selected as eluents. As a result, 0.1M thiourea in 1M HCl was powerful, showing the desorption efficiency of nearly 100%. Therefore, it may be concluded that PAAE can be useful cost-effective biosorbents for the removal and recovery of anionic precious metals as chlorocomplex form solutions containing hydrochloric acid produced in metal refining process.

키워드

저자

• Jiyeong PARK [ Div. of Semiconductor and Chemical Engineering and Research Institute of Industrial Technology, Jeonbuk, 561-756. ]
• Sung Wook WON [ Div. of Semiconductor and Chemical Engineering and Research Institute of Industrial Technology, Jeonbuk, 561-756. ]
• Juan MAO [ 1Department of Bioprocess Engineering, Chonbuk National University, Jeonbuk 561-756, Korea. ]
• Yeoung-Sang YUN [ Div. of Semiconductor and Chemical Engineering and Research Institute of Industrial Technology, Jeonbuk, 561-756. ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  한국생물공학회 학술대회

• 간기

  반년간

• 수록기간

  1985~2013

• 십진분류

  KDC 476 DDC 576