生物滞留池内3种植物对四环素胁迫的响应

颜源; 王亚军; 陈甜婧; 安芳娇

doi:10.13205/j.hjgc.202308009

生物滞留池内3种植物对四环素胁迫的响应

doi: 10.13205/j.hjgc.202308009

颜源¹,
王亚军^1,2, ,,
陈甜婧¹,
安芳娇^1,2

1. 兰州理工大学土木工程学院, 兰州 730050;
2. 兰州理工大学西部土木工程防灾减灾教育部工程研究中心, 兰州 730050

基金项目:

甘肃省科技计划资助(20JR10RA145)

国家自然科学基金(41967043,52160003)

详细信息

作者简介:
颜源(1998-),男,硕士研究生,主要研究方向为污水处理技术。940622949@qq.com

通讯作者:
王亚军(1979-),男,教授,主要研究方向为污水资源化利用。wyj79626@lut.edu.cn

计量
- 文章访问数: 113
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- 被引次数: 0
出版历程
- 收稿日期: 2022-12-08
- 网络出版日期: 2023-11-15

RESPONSE OF THREE PLANTS TO TETRACYCLINE POLLUTION STRESS IN BIORETENTION CELL

1. School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China;
2. Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Education, Lanzhou University of Technology, Lanzhou 730050, China

摘要

摘要: 为探究生物滞留池体系内(bioretention cell,BRC)植物对抗生素及氮、磷复合污染的响应,选用菖蒲(Acorus calamus)、虉草(Phalaris arundinacea)和芦苇(Phragmites communis)作为研究对象,在不同四环素(tetracycline,TC)浓度(0,0.1,0.6,1.2,1.8 μg/mL)下进行间歇批次试验。检测TC、氮素、磷素复合污染物在植物体内的富集量及BRC系统出水中的浓度,考察污染物的富集转运及去除特征;分析有机酸的变化,探讨根系分泌物对复合污染的响应机制。结果表明: 1) 在TC胁迫下,植物对TC的富集能力为菖蒲>虉草>芦苇,3种植物氮、磷富集系数(bioconcerntration factors,BCF)均与TC浓度呈负相关,氮磷转运系数(translocation factors,TF)顺序为芦苇>虉草>菖蒲;无TC胁迫下,3种植物的氮BCF差异不显著,均在4.80~5.39,磷BCF差异显著且顺序为虉草>菖蒲>芦苇。2) 3种植物BRC系统均可稳定高效去除TC,在0.1 μg/mL TC时去除率接近99.70%,在0.6,1.2,1.8 μg/mL TC时去除率均高于99.90%。TC胁迫时,菖蒲和芦苇BRC的总氮(TN)去除率均有下降,分别从73.15%、70.55%下降至最低为54.45%、47.70%,虉草BRC的TN去除率保持稳定在65%左右,菖蒲、虉草和芦苇BRC的TP去除率均明显增高,分别由75.53%、82.71%和78.64%升至最高为96.79%、98.80%和97.91%。3) TC胁迫下,3种植物柠檬酸分泌能力均增强,且菖蒲和虉草的柠檬酸分泌量与TC去除率呈显著正相关,芦苇的柠檬酸分泌量与TP去除率呈显著正相关,柠檬酸可作为外源有机酸提高植物BRC系统对TC、TP的去除。该研究结果对植物BRC去除抗生素污水的实际工程具有参考价值。
- 根系分泌物 /
- 有机酸 /
- 富集转运特征 /
- 菖蒲 /
- 虉草 /
- 芦苇
Abstract: To explore the response of plants in a bioretention cell (BRC) system to antibiotics and nitrogen and phosphorus compound pollution, Acorus calamus, Phalaris arundinacea and Phragmites communis was selected as the research objects. Intermittent batch tests were performed at different concentrations of tetracycline (TC) (0, 0.1, 0.6, 1.2, 1.8 μg/mL) in the influent. The bioconcentration in plants and concentrations in the effluent containing tetracycline, nitrogen and phosphorus compound pollutants were tested, and the bioconcentration, translocation and removal characteristics of pollutants were investigated; the change of organic acid was analyzed, and the response mechanism of root secretion to compound pollution was discussed. The results showed that: 1) with TC stress, the bioconcentration ability of plants to TC was in the order of Acorus calamus>Phalaris arundinacea>Phragmites communis. The bioconcentration factors (BCF) of nitrogen and phosphorus of the three plants were negatively correlated with TC concentration, and the translocation factors (TF) of nitrogen and phosphorus were in the order of Phragmites communis>Phalaris arundinacea>Acorus calamus. The difference in nitrogen BCF of the three plants without TC stress was not significant and ranged from 4.80 to 5.39, and there was a significant difference in phosphorus BCF, in the order of Phalaris arundinacea>Acorus calamus>Phragmites communis. 2) The three plant BRC systems could remove TC stably and efficiently, with 0.1 μg/mL of TC, the removal rate of TC was close to 99.70%; with 0.6, 1.2, 1.8 μg/mL of TC, the removal rate of TC was higher than 99.90%. With TC stress, the total nitrogen (TN) removal rates of both Acorus calamus and Phragmites communis in BRC decreased respectively from 73.15% and 70.55% to a minimum of 54.45% and 47.70%, but the TN removal rate of Phalaris arundinacea in BRC remained stable at around 65%. The total phosphorus (TP) removal rate of Acorus calamus, Phalaris arundinacea and Phragmites communis in BRC increased significantly from 75.53%, 82.71% and 78.64% to a maximum of 96.79%, 98.80% and 97.91%, respectively. 3) With TC stress, the citric acid secretion ability of the three plants increased, the amount of citric acid secreted by Acorus calamus and Phalaris arundinacea was significantly and positively correlated with the removal rate of TC, and the amount of citric acid secreted by Phragmites communis was significantly and positively correlated with the removal rate of TP. Citric acid can be used as an exogenous organic acid to improve the removal rate of TC and TP in plant BRC systems. The results of this study are useful for the practical engineering of antibiotic effluent removal by plant BRC.
- root exudates /
- organic acid /
- characteristics of bioconcentration and translocation /
- Acorus calamus /
- Phalaris arundinacea /
- Phragmites communis

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