alexa Biodegradation of Poly (aspartic acid-citric acid) Copolymers by Natural Bacteria from the Receiving Water System
E- ISSN: 2320 - 3528
P- ISSN: 2347 - 2286

Research & Reviews: Journal of Microbiology and Biotechnology
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Research Article

Biodegradation of Poly (aspartic acid-citric acid) Copolymers by Natural Bacteria from the Receiving Water System

Yuling ZHANG1*, Caixia ZHAO1, Shaoxin KANG1, Xiaodong LIU1, Wei LI1, Jiaolong WANG1, Zhiguang HU1, Jun GUO2

1School of Environmental Science & Engineering, North China Electric Power University, Baoding 071003, P R China

2Department of Computer, North China Electric Power University, Baoding 071003, P R China

*Corresponding Author:
Yuling ZHANG
School of Environmental Science & Engineering
North China Electric Power University
Baoding 071003, P R China
E-mail: [email protected]

Received date: 11/05/2016; Accepted date: 28/06/2016; Published date: 06/07/2016

 

Abstract

Poly (aspartic acid-citric acid) copolymer (PAC) is a novel high efficient water-treatment agent, and whether it is biodegradable determines its application prospect in actual circulating cooling system. In this paper, the biodegradability of PAC was researched by natural bacterial from the receiving water of domestic sewage in circulating cooling system, and investigated by carbon dioxide evolution tests. The copolymer (PAC) was characterized by FTIR, 1H NMR and 13C NMR. The results showed that the degradation ratio of PAC on 10 days and 28 days respectively reached 28.05% and 79.73%, which indicated that PAC belonged to the biodegradable water treatment agent. With the increase in the addition ratio of citric acid in copolymerization process and the decrease in the molecular weight of copolymer, the biodegradability of PAC was significantly enhanced. Cu2+ could decrease the degradation rate through inhibiting enzymatic activities. In addition, compared with other commercial scale inhibitors, biodegradable property of PAC was excellent.

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