Diatomite Modified Immobilized Delftia sp. for the Bio-Abiotic Removal of Antibiotics Amoxicillin in the Aqueous System

2017 International Conference on Environmental and Energy Engineering

生态环境科学;能源学

Gao, Lijuan^1 ; Sun, Jing^1 ; Guan, Kai^1 ; Shen, Tingting^1 ; Wang, Xikui^2

College of Environmental Science and Engineering, Qilu University of Technology, Jinan, Shandong

250353, China^1

School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology, Jinan, Shandong

250353, China^2

关键词: Abiotic removal;    Degradation kinetics;    Degradation process;    Enzymatic catalysis;    Immobilization support;    Michaelis constants;    Michaelis-Menten equations;    Treatment efficiency;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/63/1/012014/pdf
DOI  :  10.1088/1755-1315/63/1/012014

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Diatomite modified sodium alginate (Si/SA) immobilized Delftia sp. A2(2011) (STT01) was applied to degrade amoxicillin. The immobilized pellets provided a direct and visual probe for the degradation process due to their intrinsic bright colour. The results demonstrated that 100% of amoxicillin and 68.5% of CODcrremoval were achieved after 72 h, comparing with the cases of sodium alginate (SA) system (81.2%, 46.9%) and the free cells system (60.5%, 35.5%). The degradation kinetics was in good agreement with Michaelis-Menten equation. The maximum rate (Vm) and Michaelis constant (Km) were calculated as 9.09 mg L-1h-1and 228 mg L-1, respectively. The results further revealed that diatomite not only acted as immobilization support to improve the mechanical strength and lifetime of the pellets but also as absorbent to promote the treatment efficiency. Therefore, both enzymatic catalysis and chemisorption were responsible for the removal of amoxicillin.