title: Simultaneous removal of phenol, Cu and Cd from water with corn cob silica-alginate beads.
abstract: Phenol and heavy metals in petroleum waste are environmental and human health concerns, but physicochemical removal is often cost-prohibitive and can produce toxic secondary products and treatment residues. An environmentally benign alternative combines corn cob silica with alginate and immobilized bacteria into beads for treating contaminated water. The concentration of phenol was decreased >92% by Pseudomonas putida YNS1 on aliginate-silica beads (2%, w/v) after equilibrating for 96h with water containing 214mg phenol/L. GC-MS analysis indicated formation of benzoquinone and other polar products. Beads containing corn cob silica decreased Cu concentrations by 84-88% and Cd by 83-87% within 24h. In a mixture of 114mg phenol, 43mg Cu and 51mg Cd/L, phenol removal (93% within 96h) only occurred with beads containing the silica and bacterial strain. Beads containing corn cob silica removed >97% of the Cu and >99% of the Cd, critical for reducing toxicity to the bacteria. Beads with the immobilized strain removed phenol when zeolite was used instead of corn cob silica, but beads with silica were more effective for Cu and Cd removal. Results show the potential of corn cob silica combined with alginate and immobilized bacteria for removing phenol and heavy metals from contaminated water.
authors.affiliation: Division of Biotechnology, Advanced Institute of Environment and Bioscience, College of Environmental and Bioresource Sciences, Chonbuk National University, Iksan, Jeonbuk 570-752, South Korea; School of Natural Resources, University of Nebraska-Lincoln, Lincoln, NE 68583-0817, USA.
authors.forename: Jaehong
authors.initials: J
authors.lastname: Shim
authors.affiliation: Division of Biotechnology, Advanced Institute of Environment and Bioscience, College of Environmental and Bioresource Sciences, Chonbuk National University, Iksan, Jeonbuk 570-752, South Korea.
authors.forename: Jeong-Muk
authors.initials: JM
authors.lastname: Lim
authors.affiliation: School of Natural Resources, University of Nebraska-Lincoln, Lincoln, NE 68583-0817, USA.
authors.forename: Patrick J
authors.initials: PJ
authors.lastname: Shea
authors.affiliation: Division of Biotechnology, Advanced Institute of Environment and Bioscience, College of Environmental and Bioresource Sciences, Chonbuk National University, Iksan, Jeonbuk 570-752, South Korea. Electronic address: btoh@jbnu.ac.kr.
authors.forename: Byung-Taek
authors.initials: BT
authors.lastname: Oh
mesh_terms: D000464:Alginates / Q000737:chemistry*; D002104:Cadmium / Q000737:chemistry*; D018914:Cells, Immobilized / Q000382:microbiology; D003300:Copper / Q000737:chemistry*; D008670:Metals / Q000737:chemistry; D019800:Phenol / Q000737:chemistry*; D016958:Pseudomonas putida / Q000378:metabolism; D012822:Silicon Dioxide / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry; D018508:Water Purification / Q000379:methods*; D003313:Zea mays; D017641:Zeolites / Q000737:chemistry
chemical_list: D000464:Alginates; D008670:Metals; D014874:Water Pollutants, Chemical; D002104:Cadmium; D014867:Water; D017641:Zeolites; D019800:Phenol; D012822:Silicon Dioxide; D003300:Copper
keywords: Corn cob silica; Degradation; Heavy metals; Immobilized bacteria; Phenol; Pseudomonas putida