Preparation and biosorption evaluation of Bacillus subtilis/alginate–chitosan microcapsule

IF 4.9 Q2 NANOSCIENCE & NANOTECHNOLOGY

Nanotechnology, Science and Applications Pub Date : 2017-02-03 DOI:10.2147/NSA.S104808

Kefeng Tong

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引用次数: 14

Abstract

The aim of this study was to assess the effect of alginate–chitosan microcapsule on viability characteristics of Bacillus subtilis and the ability of B. subtilis/alginate–chitosan microcapsule to remove uranium ion from aqueous solution. The effects of particle size, chitosan molecular weight and inoculum density on viability characteristics were studied using alginate–chitosan microcapsule-immobilized B. subtilis experiments. In addition, the effects of pH, immobilized spherule dosage, temperature, initial uranium ion concentration and contact time on removal of uranium ion were studied using batch adsorption experiments. The results showed that alginate–chitosan microcapsule significantly improved the viability characteristics of B. subtilis and that B. subtilis/alginate–chitosan microcapsule strongly promoted uranium ion absorption. Moreover, the optimum values of pH was 6; immobilized spherule dosage was 3.5; temperature was 20°C; initial uranium ion concentration was 150 mg/L; contact time was 3 h of uranium ion absorption and the maximum adsorption capacity of uranium ion was 376.64 mg/g.

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枯草芽孢杆菌/海藻酸盐-壳聚糖微胶囊的制备及生物吸附性能评价

本研究的目的是评估藻酸盐-壳聚糖微胶囊对枯草芽孢杆菌活力特性的影响，以及枯草芽孢杆菌/藻酸盐-外壳聚糖微胶囊去除水溶液中铀离子的能力。采用海藻酸盐-壳聚糖微胶囊固定化枯草芽孢杆菌实验，研究了粒径、壳聚糖分子量和接种密度对其活力特性的影响。此外，采用分批吸附实验研究了pH、固定化球用量、温度、初始铀离子浓度和接触时间对铀离子去除的影响。结果表明，藻酸盐-壳聚糖微胶囊显著改善了枯草芽孢杆菌的活力特性，枯草芽孢杆菌/藻酸盐-外壳聚糖微胶囊对铀离子的吸收有较强的促进作用。最适pH值为6；固定化球的用量为3.5；温度为20°C；初始铀离子浓度为150 mg/L；接触时间为3h，对铀离子的最大吸附量为376.64mg/g。

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来源期刊

Nanotechnology, Science and Applications NANOSCIENCE & NANOTECHNOLOGY-

CiteScore

11.70

自引率

0.00%

发文量

审稿时长

16 weeks

期刊介绍： Nanotechnology, Science and Applications is an international, peer-reviewed, Open Access journal that focuses on the science of nanotechnology in a wide range of industrial and academic applications. The journal is characterized by the rapid reporting of reviews, original research, and application studies across all sectors, including engineering, optics, bio-medicine, cosmetics, textiles, resource sustainability and science. Applied research into nano-materials, particles, nano-structures and fabrication, diagnostics and analytics, drug delivery and toxicology constitute the primary direction of the journal.