title: Bifunctional lanthanum phosphate substrates as novel adsorbents and biocatalyst supports for perchlorate removal.
abstract: Porous lanthanum phosphate substrates, obtained by an environmentally benign colloidal forming process employing methyl cellulose, are reported here as excellent adsorbents of perchlorate with >98% efficiency and with 100% reusability. Additionally, the effectiveness of such substrates as biocatalyst supports that facilitate biofilm formation of perchlorate reducing microbes (Serratia marcescens NIIST 5) is also demonstrated for the first time. The adsorption of perchlorate ions is attributed to the pore structure of lanthanum phosphate substrate and the microbial attachment is primarily ascribed to its intrinsic hydrophobic property. Lanthanum phosphate thus emerges as a dual functional material that possesses an integrated adsorption/bioremediation property for the effective removal of ClO4(-) which is an increasingly important environmental contaminant.
authors.affiliation: Materials Science and Technology Division, India.
authors.forename: Sasidharan
authors.initials: S
authors.lastname: Sankar
authors.affiliation: Process Engineering and Environmental Technology Division, CSIR - National Institute for Interdisciplinary Science and Technology, Industrial Estate P.O., Thiruvananthapuram 695019, India.
authors.forename: Gangadharan Puthiya Veetil
authors.initials: GP
authors.lastname: Prajeesh
authors.affiliation: Process Engineering and Environmental Technology Division, CSIR - National Institute for Interdisciplinary Science and Technology, Industrial Estate P.O., Thiruvananthapuram 695019, India.
authors.forename: Vijaya Nadaraja
authors.initials: VN
authors.lastname: Anupama
authors.affiliation: Process Engineering and Environmental Technology Division, CSIR - National Institute for Interdisciplinary Science and Technology, Industrial Estate P.O., Thiruvananthapuram 695019, India; Academy of Scientific and Industrial Research (AcSIR), India.
authors.forename: Bhaskaran
authors.initials: B
authors.lastname: Krishnakumar
authors.affiliation: Materials Science and Technology Division, India.
authors.forename: Padinhattayil
authors.initials: P
authors.lastname: Hareesh
authors.affiliation: R&D Centre, Noritake Co. Ltd., Aichi, Japan.
authors.forename: Balagopal N
authors.initials: BN
authors.lastname: Nair
authors.affiliation: Materials Science and Technology Division, India; Academy of Scientific and Industrial Research (AcSIR), India.
authors.forename: Krishna Gopakumar
authors.initials: KG
authors.lastname: Warrier
authors.affiliation: Materials Science and Technology Division, India; Academy of Scientific and Industrial Research (AcSIR), India. Electronic address: hareesh@niist.res.in.
authors.forename: Unnikrishnan Nair Saraswathy
authors.initials: UN
authors.lastname: Hareesh
mesh_terms: D000327:Adsorption; D001673:Biodegradation, Environmental; D018441:Biofilms; D002384:Catalysis; D007811:Lanthanum / Q000737:chemistry*; D010472:Perchlorates / Q000737:chemistry / Q000378:metabolism; D010710:Phosphates / Q000737:chemistry*; D012706:Serratia marcescens / Q000737:chemistry / Q000502:physiology*; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000378:metabolism
chemical_list: D010472:Perchlorates; D010710:Phosphates; D014874:Water Pollutants, Chemical; D007811:Lanthanum; C494474:perchlorate
keywords: Adsorption; Bioremediation; Lanthanum phosphate; Perchlorate removal; Porous monoliths; Thermal gelation