Journal of Ecology and Rural Environment ›› 2022, Vol. 38 ›› Issue (6): 795-801.doi: 10.19741/j.issn.1673-4831.2021.0391

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Studies on Phytoremediation Potentials of Vetiveria zizanioides to Sulfonamides Polluted Water

RONG Yu-hong1,2,3, ZHAMG Fa-ming4, YANG Juan5, LI Liang6, WU Ke2, SUN Shi-xian2, ZHENG Yi1,2,7   

  1. 1. College of Landscape Architecture and Horticulture Sciences, Southwest Forestry University, Kunming 650233, China;
    2. National Plateau Wetland Research Center/College of Wetland, Southwest Forestry University, Kunming 650233, China;
    3. Yunnan Institute of Tropical Crops, Jinghong 666100, China;
    4. Faculty of Plant Protection, Yunnan Agricultural University, Kunming 650201, China;
    5. Institute of Environmental Remediation and Human Health/College of Ecology and Environment, Southwest Forestry University, Kunming 650233, China;
    6. Yunnan Animal Disease Prevention and Control Center, Kunming 650201, China;
    7. Office of President, Yunnan Open University, Kunming 650223, China
  • Received:2021-06-21 Online:2022-06-25 Published:2022-06-24

Abstract: In order to investigate the phytoremediation potentials of Vetiveria zizanioides to sulfonamides polluted water, the trials with the pretreatment method of MCX solid-phase extraction column and high performance liquid chromatography-tandem mass spectrometry (HPLC-MS) detection method were implemented under the condition of greenhouse hydroponics. Sulfonamides (SAs) were added to the nutrient solution with the initial concentration of 100 μg·L-1. The results show that the removal rates of Vetiveria zizanioides to sulfonamides (SAs) increased by 27.88% for sulfapyridine (SPY), 32.81% for sulfamethoxazole (SMZ), 29.9% for sulfadimethoxine (SDM) and 20.03% for sulfaquinoline (SQX), in comparison of no Vetiveria zizanioides treatment for the 15th day. The absorption peaks of SAs by Vetiveria zizanioides were on the 6th and 12th day, and the decrease rates of SAs in Vetiveria zizanioides nutrient solution were higher in the the first 6 days. There was a significant negative correlation between the treatment time and the residual concentration of SAS in nutrient solution (P<0.01), and a significant positive correlation between the treatment time and the increasing proportion of the removal rates in water (P<0.01). The transfer coefficients were significantly positive correlated with the concentration of SAS in the stems, leaves and roots of Vetiveria zizanioides (P<0.01). Root systems of Vetiveria zizanioides were the main organ tissues in accumulating SAs. In conclusion, Vetiveria zizanioides are of efficient absorbing capability to SDM, strong root enrichment ability to SMZ and SQX, and efficient transferring ability to SPY. Vetiver zizanioides can significantly remove SAs in polluted water.

Key words: sulfonamides, Vetiveria zizanioides, phytoremediation, polluted water

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