Publication: Potential of ornamental monocot plants for rhizofiltration of cadmium and zinc in hydroponic systems
Issued Date
2021-07-01
Resource Type
ISSN
16147499
09441344
09441344
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2-s2.0-85102201144
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Mahidol University
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SCOPUS
Bibliographic Citation
Environmental Science and Pollution Research. Vol.28, No.26 (2021), 35157-35170
Suggested Citation
Sasimar Woraharn, Weeradej Meeinkuirt, Theerawut Phusantisampan, Piyathap Avakul Potential of ornamental monocot plants for rhizofiltration of cadmium and zinc in hydroponic systems. Environmental Science and Pollution Research. Vol.28, No.26 (2021), 35157-35170. doi:10.1007/s11356-021-13151-x Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/77034
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Title
Potential of ornamental monocot plants for rhizofiltration of cadmium and zinc in hydroponic systems
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Abstract
Cadmium (Cd) and zinc (Zn) accumulation and uptake ability have been investigated in three ornamental monocot plants (Heliconia psittacorum x H. spathocircinata, Echinodorus cordifolius, and Pontederia cordata) grown in hydroponic systems. All study plants in the highest heavy metal treatments were found to be excluders for Cd and Zn with translocation factor values < 1 and bioconcentration factor (BCF) values > 100. The highest Cd and Zn accumulations were found in roots of E. cordifolius (4766.6 mg Zn kg-1 and 6141.6 mg Cd kg-1), followed by H. psittacorum x H. spathocircinata (4313.5 mg Zn kg-1) and P. cordata (3673.3 mg Cd kg-1), respectively, whereas shoots had lower performances. However, P. cordata had the lowest dry biomass production compared to the other two plant species in this study. As a result of dilution effects, heavy metal accumulation for all study plants was lower in the combined heavy metal treatments than in solely Cd and Zn only treatments. At the end of experiments, the highest uptakes of Cd and Zn were found in H. psittacorum x H. spathocircinata (62.1% Zn2+ from 10 mg Zn L-1 solution) and E. cordifolius (27.3% Cd2+ from 2 mg Cd L-1 solution). Low percentage metal uptakes were found in P. cordata; therefore, E. cordifolius and H. psittacorum x H. spathocircinata are clearly better suited for removing Cd and/or Zn from contaminated waters and hydroponic systems. Graphical abstract: [Figure not available: see fulltext.]