The enhancement of tetracycline degradation through zero-valent iron combined with microorganisms during wastewater treatment: Mechanism and contribution

零价铁 吸附 化学 微生物 活性污泥 废水 环境化学 环境工程 细菌 环境科学 有机化学 遗传学 生物
作者
Min Yan,Zhongxian Su,Jiazeng Ding,Tingting Zhu,Yiwen Liu
出处
期刊:Environmental Research [Elsevier]
卷期号:226: 115666-115666 被引量:5
标识
DOI:10.1016/j.envres.2023.115666
摘要

Ttetracycline (TC) posed potential threats to human health and ecological environment due to its mutagenicity, deformity and strong toxicity. However, few researches focused on the mechanism and their contribution of TC removal through microorganisms combined with zero-valent iron (ZVI) in wastewater treatment field. In this study, three groups of anaerobic reactors, added with ZVI, activated sludge (AS), ZVI coupled with activated sludge (ZVI + AS), respectively, were performed to explore the mechanism and the contribution of ZVI combined with microorganisms on TC removal. The results showed that the additive effects of ZVI and microorganisms improved TC removal. In ZVI + AS reactor, TC was mainly removed by the ZVI adsorption, chemical reduction and microbial adsorption. At the initial period of the reaction, microorganisms played a major role in the ZVI + AS reactors, contributing 80%. The fraction of ZVI adsorption and chemical reduction were 15.5% and 4.5%, respectively. Afterwards, the microbial adsorption gradually reached saturation and the chemical reduction as well as the adsorption of ZVI did their stuff. However, iron-encrustation covered on the adsorption sites of microorganisms and the inhibitory effect of TC on biological activity led to the decreasing TC removal in the ZVI + AS reactor after 23 h 10 min. The optimum reaction time for TC removal in ZVI coupling microbial system was about 70 min. In 1 h 10 min, the TC removal efficiencies were 15%, 63% and 75% in ZVI, AS and ZVI + AS reactors, respectively. Finally, in order to relieve the influence of TC on activated sludge and the iron cladding, a two-stage process was proposed to be explored later in the future.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
大幅提高文件上传限制,最高150M (2024-4-1)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
刚刚
1秒前
Ali完成签到,获得积分10
1秒前
1秒前
哒哒完成签到 ,获得积分10
2秒前
甜甜玫瑰应助欧小仙采纳,获得10
2秒前
努力的小狗屁应助欧小仙采纳,获得10
2秒前
李爱国应助欧小仙采纳,获得10
2秒前
3秒前
HT-Wang完成签到 ,获得积分10
3秒前
jzs完成签到 ,获得积分10
4秒前
西瓜完成签到,获得积分10
4秒前
小郭发布了新的文献求助10
5秒前
烟熏柿子发布了新的文献求助10
6秒前
6秒前
烟花应助嘟嘟采纳,获得10
7秒前
jisuanwuli发布了新的文献求助10
7秒前
热情的达完成签到,获得积分10
9秒前
甜汤发布了新的文献求助20
10秒前
任鲂完成签到,获得积分20
11秒前
Churchill87426完成签到,获得积分10
11秒前
心肺复苏~发布了新的文献求助10
12秒前
HH应助咖喱鸡采纳,获得10
13秒前
会变成光的怪兽完成签到,获得积分20
13秒前
Metakuro发布了新的文献求助10
14秒前
哒哒发布了新的文献求助10
16秒前
bkagyin应助789采纳,获得10
16秒前
17秒前
DL_LBK完成签到,获得积分10
18秒前
心肺复苏~完成签到,获得积分10
19秒前
辛勤的豌豆完成签到 ,获得积分10
21秒前
shepherd完成签到 ,获得积分10
22秒前
土豆丝炒姜丝应助哒哒采纳,获得10
22秒前
天天快乐应助哒哒采纳,获得10
22秒前
脑洞疼应助负责的寒梅采纳,获得50
22秒前
24秒前
24秒前
clcl完成签到,获得积分10
26秒前
27秒前
28秒前
高分求助中
Sustainability in Tides Chemistry 2800
Kinetics of the Esterification Between 2-[(4-hydroxybutoxy)carbonyl] Benzoic Acid with 1,4-Butanediol: Tetrabutyl Orthotitanate as Catalyst 1000
The Young builders of New china : the visit of the delegation of the WFDY to the Chinese People's Republic 1000
Rechtsphilosophie 1000
Bayesian Models of Cognition:Reverse Engineering the Mind 888
Handbook of Qualitative Cross-Cultural Research Methods 600
Very-high-order BVD Schemes Using β-variable THINC Method 568
热门求助领域 (近24小时)
化学 医学 生物 材料科学 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 基因 遗传学 催化作用 物理化学 免疫学 量子力学 细胞生物学
热门帖子
关注 科研通微信公众号,转发送积分 3137328
求助须知:如何正确求助?哪些是违规求助? 2788413
关于积分的说明 7786262
捐赠科研通 2444571
什么是DOI,文献DOI怎么找? 1299936
科研通“疑难数据库(出版商)”最低求助积分说明 625680
版权声明 601023