title: Synthesis and characterization of ZnO:CeO2:nanocellulose:PANI bionanocomposite. A bimodal agent for arsenic adsorption and antibacterial action.
abstract: In the present study we report the generation of a bimodal, ZnO:CeO2:nanocellulose:polyaniline bionanocomposite having an appreciable remediation efficiency for dissolved Arsenic along with a noticeable antibacterial activity. The microstructural analysis of the synthesized bionanocomposite was carried out by TEM, XRD and FTIR studies, which confirmed the incorporation of the nanoscaled ZnO and CeO2 in the polymeric nanocellulose:polyaniline matrix. The bionanocomposite exhibited a remediation efficiency above ∼95% against As under different adsorbent concentrations and pH conditions. The biosorption mechanism of As on the nanobiosorbent was found to conform to the Freundlich and Dubinin-Radushkevich isotherms. Antibacterial assays for the bionanocomposite showed a high antibacterial activity with MIC50 values of 10.6μgml(-1) against the Gram-positive Bacillus subtilis and 10.3μgml(-1) against the Gram-negative Escherichia coli. Thus, the bionanocomposite shall be of high interest as a novel and sustainable matrix for the design of coats/devices that effectuate arsenic adsorption and microbial control, to generate contaminant free potable water.
authors.affiliation: Department of Molecular Biology and Biotechnology, Tezpur University, Tezpur, Assam 784028, India.
authors.forename: B K
authors.initials: BK
authors.lastname: Nath
authors.affiliation: Department of Molecular Biology and Biotechnology, Tezpur University, Tezpur, Assam 784028, India.
authors.forename: C
authors.initials: C
authors.lastname: Chaliha
authors.affiliation: Department of Molecular Biology and Biotechnology, Tezpur University, Tezpur, Assam 784028, India. Electronic address: ekalita@tezu.ernet.in.
authors.forename: E
authors.initials: E
authors.lastname: Kalita
authors.affiliation: Department of Biotechnology, Gauhati University, Guwahati, Assam 781014, India.
authors.forename: M C
authors.initials: MC
authors.lastname: Kalita
mesh_terms: D000327:Adsorption; D000814:Aniline Compounds / Q000737:chemistry / Q000494:pharmacology; D000900:Anti-Bacterial Agents / Q000138:chemical synthesis* / Q000494:pharmacology*; D001151:Arsenic / Q000737:chemistry / Q000378:metabolism*; D001412:Bacillus subtilis / Q000187:drug effects*; D002482:Cellulose / Q000737:chemistry / Q000494:pharmacology; D002563:Cerium / Q000737:chemistry / Q000494:pharmacology; D060766:Drinking Water / Q000737:chemistry; D004926:Escherichia coli / Q000187:drug effects*; D008826:Microbial Sensitivity Tests; D053761:Nanocomposites / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*; D015034:Zinc Oxide / Q000737:chemistry / Q000494:pharmacology
chemical_list: D000814:Aniline Compounds; D000900:Anti-Bacterial Agents; D060766:Drinking Water; C416807:polyaniline; D002563:Cerium; C030583:ceric oxide; D002482:Cellulose; D001151:Arsenic; D015034:Zinc Oxide
keywords: Adsorption; Antibacterial; Arsenic; Nanocellulose; Polyaniline