Biosorbents based on esterified starch carrying immobilized oil-degrading microorganisms
Biosorbents based on esterified starch carrying immobilized oil-degrading microorganisms
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DOI：
10.1016/j.jbiotec.2017.08.024
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发表时间：
2017-10-20
影响因子：
4.1
通讯作者：
Belyy, V. A.
中科院分区：
文献类型：
--
作者：
Tarabukin, D. V.;Torlopov, M. A.;Belyy, V. A.
基于疏水淀粉的复合吸附剂含有石油降解菌，已被提出用于有效吸附和利用石油相关污染物。该吸附剂是以取代度为0.4-1.1的苯甲酸酯、月桂酸酯和硬脂酸酯淀粉为基础制成的。淀粉的酯化反应是在水-有机介质中与相应酸的酰氯反应进行的。用扫描电子显微镜、红外光谱和核磁共振光谱对其结构进行了表征。由于多孔的疏水结构，这些吸附剂能够将石油产品结合并保留在水面上，并在石油产品吸附后保持浮选至少30天。对所得样品的生物降解性测试表明，改性淀粉能被微生物降解，不会造成二次污染。固定化粘红酵母VKM Y-2993D和假单胞菌VKM B-3041D的培养有利于积累石油产品的快速利用。
The complex sorbents based on hydrophobized starch, which contain oil-degrading microorganisms, have been proposed for effective sorption and utilization of petroleum-related pollutants. The sorbents were made on the base of benzoic, lauric and stearic acid esters of starch with degrees of substitution of 0.4-1.1. The esterification of starch was carried out by the reaction with acyl chlorides of the corresponding acids in an aqueous-organic medium. The structure of the esters was studied by SEM, IR and NMR spectroscopy. As a result of porous hydrophobic structure, these sorbents are capable of binding and retention of petroleum products on the water surface, and keeping the flotation for at least 30 days after the petroleum products sorption. The test of biodegradability of the obtained samples revealed that the modified starches can be degraded by microscopic fungi, therefore they do not cause secondary pollution. The cultures of yeast Rhodotorula glutinis VKM Y-2993D and bacteria Pseudomonas libanensis VKM B-3041D immobilized on the sorbent facilitate the rapid utilization of accumulated petroleum products.