Details

Autor(en) / Beteiligte

• Chen, Jun
• Liu, Shuang-Shuang
• Wu, Qiong
• Huang, Wei-Jie
• Yang, Fang
• Wang, Yi-Jie
• He, Lu-Xi
• Ying, Guang-Guo
• Chen, Wen-Long
• Chen, Chang-Er

Titel

Removal, fate, and bioavailability of fluoroquinolone antibiotics in a phytoremediation system with four wetland plants: Combing dynamic DGT and traditional methods

Ist Teil von

• The Science of the total environment, 2023-07, Vol.881, p.163464-163464, Article 163464

Ort / Verlag

Netherlands: Elsevier B.V

Erscheinungsjahr

2023

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• Phytoremediation is considered an effective technology for remediating antibiotic-contaminated water; however, its underlying mechanisms remain poorly understood. Therefore, this study investigated the phytoremediation potential of fluoroquinolone antibiotics (FQs) by different wetland plant species. The phytoremediation rates of ΣFQs were 46–69 %, and rhizosphere microorganism degradation (accounting for 90–93 %) dominated the FQ removal over that of plant uptake and hydrolysis. Dissipation of the FQs in the hydroponic system followed a first-order kinetic model. The joint action of the more powerful absorptive capacity of plants and stronger microbial degradation ability in the rhizosphere was the reason that Cyperus papyrus showed significantly higher FQ phytoremediation rates than the other three plant species, which implied that the plant species is a critical factor affecting phytoremediation efficiency. The FQ distribution in plant tissues decreased from root > stem > leaf, suggesting that FQs were more concentrated in the roots than in the aboveground tissues. Negative correlations between the diffusive gradient in thin films and root concentrations implied that these wetland plant species took up FQs mainly via active transport mechanism (requiring some vectors, perhaps via exudates); whereas, the process of root-to-stem transfer and upward transport represented passive transport, which mainly depended on transpiration. These results facilitate an improved understanding of phytoremediation processes and improve their future applications. [Display omitted] •Rhizosphere microorganism degradation dominated the FQs removal in the phytoremediation process.•Plant species is a key factor affecting the phytoremediation efficiency of fluoroquinolones.•FQs were accumulated most in the root, followed by the stem and leaf.•Transfer of FQs from environment to root and stem to leaf depends more on active transport.•The process of root-to-stem transfer and upward transport belongs to passive transport.