Horizontal-flow Constructed Wetlands for the Remediation of Cylindrospermopsin and Microcystin-lr: a Story of Plants, Microbes, and Biodegradation Pathways

生物降解 微囊藻毒素 环境修复 肝毒素 湿地 环境科学 微囊藻毒素 环境工程 生物 生态学 蓝藻 细菌 污染 遗传学
作者
Alba Martínez i Quer,Carlos A. Arias,Lea Ellegaard‐Jensen,Anders Johansen,Maria Lund Paulsen,Ada Pastor,Pedro N. Carvalho
出处
期刊:Social Science Research Network [Social Science Electronic Publishing]
标识
DOI:10.2139/ssrn.4690121
摘要

Cyanobacterial harmful blooms will be more intense and frequent in the future contaminating surface waters with cyanotoxins, posing a threat in already vulnerable communities heavily reliant on surface water usage for crop irrigation. Constructed wetlands (CWs) are proposed to ensure safe crop irrigation, but more research is needed before implementation. The present study operated 28 mesocosms in continuous mode mimicking horizontal sub-surface flow CWs. Mesocosms were fed with synthetic eutrophic lake water and spiked with two cyanotoxins, microcystin-LR (MC-LR) and cylindrospermopsin (CYN), at environmentally relevant cyanotoxins concentrations (10 µg L-1). The influence of various design factors, including plant species, porous media type, and seasonality, was explored. The mesocosms achieved maximum MC-LR and CYN mass removal rates of 95 % and 98 %, respectively. CYN removal is reported for the first time in CWs mimicking horizontal sub-surface flow CWs. Interestingly, planted-mesocosms consistently delivered higher removal rates for both cyanotoxins. Phragmites australis-planted mesocosms exhibited superior removal efficiency, while Juncus effusus yielded the effluent with the lowest concentration of cyanotoxins due to lower evapotranspiration. Using the P-k-C* model, different scaling-up scenarios were calculated, being the best compromise for future piloting an area of 6 – 36 m2 per m3 of water being treated per day. Additionally, bacterial communities’ structure was analyzed through correlation matrices and differential taxa analyses, offering promising insights into their fundamental removal role. Nevertheless, attempts to validate microcystin-LR biotransformation via the known mlrA gene degradation pathway were unfruitful, indicating alternative enzymatic degradation pathways occurring in such complex CW systems. Further investigation into the precise molecular mechanisms of removal and the identification of transformation products is needed for the comprehensive understanding of cyanotoxin mitigation in CW. All in all, this study points towards the feasibility of horizontal sub-surface flow CWs to be employed for controlling cyanotoxins in irrigation or recreational waters.
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
PDF的下载单位、IP信息已删除 (2025-6-4)

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
XXX完成签到,获得积分10
1秒前
锡嘻完成签到 ,获得积分10
1秒前
2秒前
彗星入梦完成签到 ,获得积分10
2秒前
恋恋青葡萄完成签到,获得积分10
2秒前
隐形万言完成签到,获得积分10
4秒前
Time完成签到,获得积分10
4秒前
土木研学僧完成签到,获得积分10
5秒前
yjy完成签到 ,获得积分10
5秒前
A溶大美噶完成签到,获得积分10
5秒前
yar应助萨尔莫斯采纳,获得10
6秒前
Will发布了新的文献求助10
6秒前
美好的鹏笑完成签到,获得积分10
8秒前
啦啦啦啦啦完成签到,获得积分10
8秒前
LYegoist完成签到,获得积分10
10秒前
可爱的小丸子完成签到,获得积分10
10秒前
一川烟叶完成签到,获得积分10
12秒前
12秒前
15秒前
iFan完成签到 ,获得积分10
15秒前
萨尔莫斯完成签到,获得积分10
15秒前
合适靖儿完成签到 ,获得积分10
17秒前
林林林完成签到,获得积分10
18秒前
斯琪欣完成签到,获得积分10
19秒前
20秒前
MQQ完成签到 ,获得积分10
20秒前
meng发布了新的文献求助10
20秒前
21秒前
zxc167完成签到,获得积分10
21秒前
研友_nVWP2Z完成签到 ,获得积分10
23秒前
俭朴的半雪完成签到 ,获得积分10
24秒前
大橙子发布了新的文献求助10
25秒前
meng完成签到,获得积分10
26秒前
27秒前
27秒前
科研韭菜完成签到 ,获得积分10
27秒前
SYLJ完成签到,获得积分10
29秒前
灵巧的十八完成签到 ,获得积分10
30秒前
斯文的傲珊完成签到,获得积分10
30秒前
樊一完成签到,获得积分10
31秒前
高分求助中
【提示信息,请勿应助】关于scihub 10000
Les Mantodea de Guyane: Insecta, Polyneoptera [The Mantids of French Guiana] 3000
徐淮辽南地区新元古代叠层石及生物地层 3000
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
Handbook of Industrial Diamonds.Vol2 1100
Global Eyelash Assessment scale (GEA) 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 550
热门求助领域 (近24小时)
化学 材料科学 医学 生物 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 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 4038201
求助须知:如何正确求助?哪些是违规求助? 3575940
关于积分的说明 11373987
捐赠科研通 3305747
什么是DOI,文献DOI怎么找? 1819274
邀请新用户注册赠送积分活动 892662
科研通“疑难数据库(出版商)”最低求助积分说明 815022