Next Article in Journal
Entropy-induced Separation of Binary Semiflexible Ring Polymer Mixtures in Spherical Confinement
Next Article in Special Issue
Green Flexible Polyurethane Foam as a Potent Support for Fe-Si Adsorbent
Previous Article in Journal
Effect of Particle Sizes of Nickel Powder on Thermal Conductivity of Epoxy Resin-Based Composites under Magnetic Alignment
Previous Article in Special Issue
Study on Preparation and Separation and Adsorption Performance of Knitted Tube Composite β-Cyclodextrin/Chitosan Porous Membrane
Open AccessArticle

Application of Colloidal Dispersions of Bioshell Calcium Oxide (BiSCaO) for Disinfection

1
Division of Biomedical Engineering, Research Institute, National Defense Medical College, 3-2 Namiki, Tokorazawa, Saitama 359-8513, Japan
2
Department of Oral and Maxillofacial Surgery, National Defense Medical College, 3-2 Namiki, Tokorozawa, Saitama 359-8513, Japan
*
Author to whom correspondence should be addressed.
Polymers 2019, 11(12), 1991; https://doi.org/10.3390/polym11121991
Received: 21 October 2019 / Revised: 26 November 2019 / Accepted: 27 November 2019 / Published: 2 December 2019
Bioshell calcium oxide (BiSCaO) is a scallop-shell powder heated at a high temperature. BiSCaO is composed mainly of calcium oxide and exhibits broad microbicidal properties. The aim of this study is to evaluate the disinfection and decontamination abilities of BiSCaO colloidal dispersions with that of commercially available bioshell calcium hydroxide (BiSCa(OH)2) following the formation of flocculants/precipitates under strongly alkaline conditions (pH 11.5–12.2). Various concentrations of BiSCaO and BiSCa(OH)2 colloidal dispersions were prepared by mixing with Na-polyPO4 (PP) and Na-triPO4 (TP) as flocculating agents. The microbicidal activities, and the degree of flocculation/precipitation of trypan blue, albumin, chondroitin sulfate, heparin, non-anticoagulant heparin carrying polystyrene (NAC-HCPS), and low-molecular-weight heparin/protamine nanoparticles (LMWH/P NPs) were dependent on the pH, the average particle diameter, and the concentration of BiSCaO or BiSCa(OH)2 and of the phosphate compound. BiSCaO (average particle diameter: 6 μm) colloidal dispersions (0.2 wt.%) containing 0.15 wt.% PP or TP exhibited substantially stronger microbicidal activity and flocculation/precipitation under strongly alkaline conditions. These results suggest that BiSCaO colloidal dispersions together with phosphate compounds have practical applicability for disinfection.
Keywords: bioshell powder; calcium oxides; colloidal dispersion; microbicidal activity; disinfection; flocculation/precipitation bioshell powder; calcium oxides; colloidal dispersion; microbicidal activity; disinfection; flocculation/precipitation
Show Figures

Graphical abstract

MDPI and ACS Style

Sato, Y.; Ohata, H.; Inoue, A.; Ishihara, M.; Nakamura, S.; Fukuda, K.; Takayama, T.; Murakami, K.; Hiruma, S.; Yokoe, H. Application of Colloidal Dispersions of Bioshell Calcium Oxide (BiSCaO) for Disinfection. Polymers 2019, 11, 1991.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop