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Recovery of palladium from hydrochloric solution using adsorption, desorption, and Incineration
S90
Abstracts / Journal of Bioscience and Bioengineering 108 (2009) S75–S95
oxidizing bacteria contribute for the simultaneous removal of As, Fe, and Mn in the biological filtration system. doi:10.1016/j.jbiosc.2009.08.263
EN-P31 Recovery of palladium from hydrochloric solution using adsorption, desorption, and Incineration Jiyeong Park,1 Sung Wook Won,1 Juan Mao,2 and Yeoung-Sang Yun1,2 Division of Semiconductor and Chemical Engineering, Chonbuk National University, jeonju/jeonbuk, Republic of Korea 1 and Department of Bioprocess Engineering, Chonbuk National University, Jeonbuk, Republic of Korea 2 In this study, experiments for palladium recovery were performed by using various sorbents such as chemical modified biosorbent (polyethyleimine-modified Corynebacterium glutamicum biomass; PEIB), activated carbon (SPC-100), and ion-exchange resin (TP214). The parameters studied for performance evaluation of sorbents included contact time and initial metal concentration. Kinetic experiments showed that Pd(II) sorption rapidly occurred in first 10 min, and almost achieved equilibrium within 60 min in case of PEIB and SPC-100. The isotherm data were fitted with Langmuir isotherm model, showing that the maximum uptake of PEIB, TP214 and SPC-100 was determined to be 176 mg/g, 300 mg/g and 100 mg/g, respectively. In order to recover palladium from Pdloaded sorbents, desorption and incineration methods were applied. For the desorption studies, 0.1 M thiourea in 1 M HCl was selected as an eluent. Desorption study elucidated that the desorption efficiency of PEIB was much higher (nearly 100%) than those of other sorbents. In case of incineration experiments, recovery efficiencies of PEIB and TP214 were closed to 100%. As a powerful biosorbent for commercial application, powder formed PEIB was immobilized as chitosan fiber. Maximum uptake of chitosan fiber was determined to be 250 mg/g. Therefore, biosorbent could be considered as a proper sorbent for recovery of palladium. References 1. Ramesh, A., Hasegawa, H., Sugmoto, W., Maki, T., and Ueda, K.: Adsorption of gold (III), platinum(IV) and palladium (II) onto glycine modified crosslinked chitosan resin, J Bioresource Technol., 99, 3801-3809 (2008). 2. Lloyd-jones, P.J., Rangel-menez, J.R., and Streat, M.: Mercury sorption from aqueous solution by chelating ion exchange resins, activated carbon and a biosorbent, Pro. Safety and Envi. Prote., 82, 301-311 (2004).
doi:10.1016/j.jbiosc.2009.08.264
EN-P32 Bacterial diversity and mechanism of drinking water treatment using bio-filtration for removal of iron and manganese from groundwater Ichiro Suzuki,1,2 Danladi Mahuta Sahabi,1 Minoru Takeda,1 and Jun-ichi Koizumi1
Graduate School of Engineering, Yokohama National University, Yokohama, Kanagawa, Japan 1 and Center for Risk Management and Safety Sciences, Yokohama National University, Yokohama, Kanagawa, Japan 2 Bio-filtration is a useful method for the drinking water treatment of groundwater containing iron (Fe) and manganese (Mn), which utilizes microbial consortia including Fe- and Mn-oxidizing bacteria. Removal of Mn in the bio-filtration is promoted by biological Mnoxidation activities of the bacterial consortia and autocatalytic Mnoxidation activity of the biogenic Mn-oxides accumulated on the biofilters (biofilm-coated anthracites). To investigate the mechanism of Mn removal by the bio-filtration, bio-filters of the groundwater treatment plant in Joyo city, Kyoto, were collected. Studies of the Mn removal by the bio-filers resulted that autocatalytic oxidation activity is much higher than the biological oxidation activity. The Mn removal capacities by adsorption and autocatalytic oxidation of the bio-filters were 0.34–1.17 mg/g, which are much higher than the amount of Mn removed per day by the biofiltration plant of Joyo city (0.031 mg/g bio-filters). However, the autocatalytic oxidation of Mn causes loss of the activity, since Mn(IV)oxides are reduced to Mn(III)-oxides which do not show the autocatalytic activity. Thus, biological Mn-oxidation would be required not only for removal of Mn in groundwater, but for reactivation of Mn (III)-oxides on the bio-filter produced by the autocatalytic Mn-oxidation. To reveal bacterial diversity of the bio-filters, total DNAs were extracted from bio-filters to prepare 16S rRNA gene clone library. Nucleotide sequences of the 16S rRNA clones were analyzed, and 39 operational taxonomic units (OTUs) were isolated. Among them, clones close to Fe and Mn-oxidizing bacteria (Leptothrix, Caldimonas, Hyphomicrobium), Fe-oxidizing bacteria (Gallionella), Fe-reducing bacteria, ammonium oxidizing bacteria, nitrite oxidizing bacteria, and denitrifying bacteria were detected. It is indicated that such a rich bacterial ecosystem is constructed on the bio-filter, which seems to be essential for stable Mn removal activity of the bio-filtration system. doi:10.1016/j.jbiosc.2009.08.265
EN-P33 Comparative studies on indoor and outdoor microalgal cultivations for carbon dioxide fixation and bioenergy production Z-Hun Kim, Eung-Sic Kim, Sin Ae Kang, Dong-Keon Kim, and Choul-Gyun Lee Department of Biological Engineering, Inha University, Incheon, Republic of Korea Microalgae are not only able to carbon dioxide from combustion of fossil fuel but also able to convert energy intensive fuel molecules. Objective of this study is to evaluate the differences between in/ outdoor culture conditions and to examine the kinetics of the cell growth as well as CO2 fixation rate using autotrophic cultivation of Chlorella vulgaris in bubble column photobioreactors (BC-PBR). Two different sources of CO2 gases were investigated at indoor and outdoor, respectively: pure CO2 gas and actual flue gas from combustion of kerosene. In order to investigate combined effect of natural light (NL) and artificial light (AL), BC-PBR set up at outdoor with a supplemental AL intensity of 100 mol∙m− 2∙s− 1 using fluorescent lamps only during night time [1]. The results showed that a proper combination of AL (at night time) and NL in outdoor cultures could support as much cell
Abstracts / Journal of Bioscience and Bioengineering 108 (2009) S75–S95
oxidizing bacteria contribute for the simultaneous removal of As, Fe, and Mn in the biological filtration system. doi:10.1016/j.jbiosc.2009.08.263
EN-P31 Recovery of palladium from hydrochloric solution using adsorption, desorption, and Incineration Jiyeong Park,1 Sung Wook Won,1 Juan Mao,2 and Yeoung-Sang Yun1,2 Division of Semiconductor and Chemical Engineering, Chonbuk National University, jeonju/jeonbuk, Republic of Korea 1 and Department of Bioprocess Engineering, Chonbuk National University, Jeonbuk, Republic of Korea 2 In this study, experiments for palladium recovery were performed by using various sorbents such as chemical modified biosorbent (polyethyleimine-modified Corynebacterium glutamicum biomass; PEIB), activated carbon (SPC-100), and ion-exchange resin (TP214). The parameters studied for performance evaluation of sorbents included contact time and initial metal concentration. Kinetic experiments showed that Pd(II) sorption rapidly occurred in first 10 min, and almost achieved equilibrium within 60 min in case of PEIB and SPC-100. The isotherm data were fitted with Langmuir isotherm model, showing that the maximum uptake of PEIB, TP214 and SPC-100 was determined to be 176 mg/g, 300 mg/g and 100 mg/g, respectively. In order to recover palladium from Pdloaded sorbents, desorption and incineration methods were applied. For the desorption studies, 0.1 M thiourea in 1 M HCl was selected as an eluent. Desorption study elucidated that the desorption efficiency of PEIB was much higher (nearly 100%) than those of other sorbents. In case of incineration experiments, recovery efficiencies of PEIB and TP214 were closed to 100%. As a powerful biosorbent for commercial application, powder formed PEIB was immobilized as chitosan fiber. Maximum uptake of chitosan fiber was determined to be 250 mg/g. Therefore, biosorbent could be considered as a proper sorbent for recovery of palladium. References 1. Ramesh, A., Hasegawa, H., Sugmoto, W., Maki, T., and Ueda, K.: Adsorption of gold (III), platinum(IV) and palladium (II) onto glycine modified crosslinked chitosan resin, J Bioresource Technol., 99, 3801-3809 (2008). 2. Lloyd-jones, P.J., Rangel-menez, J.R., and Streat, M.: Mercury sorption from aqueous solution by chelating ion exchange resins, activated carbon and a biosorbent, Pro. Safety and Envi. Prote., 82, 301-311 (2004).
doi:10.1016/j.jbiosc.2009.08.264
EN-P32 Bacterial diversity and mechanism of drinking water treatment using bio-filtration for removal of iron and manganese from groundwater Ichiro Suzuki,1,2 Danladi Mahuta Sahabi,1 Minoru Takeda,1 and Jun-ichi Koizumi1
Graduate School of Engineering, Yokohama National University, Yokohama, Kanagawa, Japan 1 and Center for Risk Management and Safety Sciences, Yokohama National University, Yokohama, Kanagawa, Japan 2 Bio-filtration is a useful method for the drinking water treatment of groundwater containing iron (Fe) and manganese (Mn), which utilizes microbial consortia including Fe- and Mn-oxidizing bacteria. Removal of Mn in the bio-filtration is promoted by biological Mnoxidation activities of the bacterial consortia and autocatalytic Mnoxidation activity of the biogenic Mn-oxides accumulated on the biofilters (biofilm-coated anthracites). To investigate the mechanism of Mn removal by the bio-filtration, bio-filters of the groundwater treatment plant in Joyo city, Kyoto, were collected. Studies of the Mn removal by the bio-filers resulted that autocatalytic oxidation activity is much higher than the biological oxidation activity. The Mn removal capacities by adsorption and autocatalytic oxidation of the bio-filters were 0.34–1.17 mg/g, which are much higher than the amount of Mn removed per day by the biofiltration plant of Joyo city (0.031 mg/g bio-filters). However, the autocatalytic oxidation of Mn causes loss of the activity, since Mn(IV)oxides are reduced to Mn(III)-oxides which do not show the autocatalytic activity. Thus, biological Mn-oxidation would be required not only for removal of Mn in groundwater, but for reactivation of Mn (III)-oxides on the bio-filter produced by the autocatalytic Mn-oxidation. To reveal bacterial diversity of the bio-filters, total DNAs were extracted from bio-filters to prepare 16S rRNA gene clone library. Nucleotide sequences of the 16S rRNA clones were analyzed, and 39 operational taxonomic units (OTUs) were isolated. Among them, clones close to Fe and Mn-oxidizing bacteria (Leptothrix, Caldimonas, Hyphomicrobium), Fe-oxidizing bacteria (Gallionella), Fe-reducing bacteria, ammonium oxidizing bacteria, nitrite oxidizing bacteria, and denitrifying bacteria were detected. It is indicated that such a rich bacterial ecosystem is constructed on the bio-filter, which seems to be essential for stable Mn removal activity of the bio-filtration system. doi:10.1016/j.jbiosc.2009.08.265
EN-P33 Comparative studies on indoor and outdoor microalgal cultivations for carbon dioxide fixation and bioenergy production Z-Hun Kim, Eung-Sic Kim, Sin Ae Kang, Dong-Keon Kim, and Choul-Gyun Lee Department of Biological Engineering, Inha University, Incheon, Republic of Korea Microalgae are not only able to carbon dioxide from combustion of fossil fuel but also able to convert energy intensive fuel molecules. Objective of this study is to evaluate the differences between in/ outdoor culture conditions and to examine the kinetics of the cell growth as well as CO2 fixation rate using autotrophic cultivation of Chlorella vulgaris in bubble column photobioreactors (BC-PBR). Two different sources of CO2 gases were investigated at indoor and outdoor, respectively: pure CO2 gas and actual flue gas from combustion of kerosene. In order to investigate combined effect of natural light (NL) and artificial light (AL), BC-PBR set up at outdoor with a supplemental AL intensity of 100 mol∙m− 2∙s− 1 using fluorescent lamps only during night time [1]. The results showed that a proper combination of AL (at night time) and NL in outdoor cultures could support as much cell