Effect of different concentrations of gibberellins on antibiotics and nutrient removal using microalgae-bacteria consortia system.

IF 3.1 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

International Journal of Phytoremediation Pub Date : 2025-09-02 DOI:10.1080/15226514.2025.2554172

Pu Cheng, Zhengfang Wang, Bei Lu, Yongjun Zhao, Hui Zhang

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Abstract

Phytohormone gibberellins (GAs) were utilized to enhance the removal of tetracycline antibiotics and nutrients from swine wastewater by different algal-bacterial symbiosis. Compared to microalgae monoculture, microalgae-activated sludge, and microalgae-Bacillus licheniformis, microalgae-endophytic bacteria showed better growth, photosynthetic, and purification performance. At 50 mg L^-1 GAs addition concentration, the specific growth rate of Chlorella vulgaris-endophytic bacterial (S395-2) system was 0.331 ± 0.03 d^-1, the maximum removal rate of tetracycline (TC), total nitrogen (TN) and total phosphorus (TP) was 96.31 ± 2.73%, 86.37 ± 8.31% and 87.26 ± 8.42%, respectively. The purification effect was much higher than the level of microalgae monoculture without GAs addition (TC removal of 81.33 ± 7.71%, TN and TP removal of 62.51 ± 5.95% and 64.25 ± 6.13%, respectively). In summary, exogenous GAs simultaneously promoted the resistance and biomass accumulation of algal symbiosis, which supplied a theoretical foundation for the treatment of high-concentration nutrients and antibiotics wastewater.

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不同浓度赤霉素对微藻-菌群系统中抗生素和营养物去除的影响。

利用植物激素赤霉素（giberellins, GAs）促进不同菌藻共生对生猪废水中四环素类抗生素和营养物质的去除。与微藻单培养、微藻-活性污泥、微藻-地衣芽孢杆菌相比，微藻-内生细菌表现出更好的生长、光合和净化性能。在50 mg L-1 GAs添加浓度下，普通小球藻-内生细菌（S395-2）体系的比生长率为0.331±0.03 d-1，对四环素（TC）、总氮（TN）和总磷（TP）的最大去除率分别为96.31±2.73%、86.37±8.31%和87.26±8.42%。净化效果远高于未添加GAs的微藻单养水平（TC去除率为81.33±7.71%，TN和TP去除率分别为62.51±5.95%和64.25±6.13%）。综上所述，外源气体同时促进了藻类共生的抗性和生物量积累，为处理高浓度营养物和抗生素废水提供了理论基础。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Phytoremediation 环境科学-环境科学

CiteScore

7.60

自引率

5.40%

发文量

145

审稿时长

3.4 months

期刊介绍： The International Journal of Phytoremediation (IJP) is the first journal devoted to the publication of laboratory and field research describing the use of plant systems to solve environmental problems by enabling the remediation of soil, water, and air quality and by restoring ecosystem services in managed landscapes. Traditional phytoremediation has largely focused on soil and groundwater clean-up of hazardous contaminants. Phytotechnology expands this umbrella to include many of the natural resource management challenges we face in cities, on farms, and other landscapes more integrated with daily public activities. Wetlands that treat wastewater, rain gardens that treat stormwater, poplar tree plantings that contain pollutants, urban tree canopies that treat air pollution, and specialized plants that treat decommissioned mine sites are just a few examples of phytotechnologies.