Environmental Science and Pollution Research Pub Date : 2021-03-05 , DOI: 10.1007/s11356-021-13151-x Sasimar Woraharn 1 , Weeradej Meeinkuirt 1, 2 , Theerawut Phusantisampan 3 , Piyathap Avakul 1
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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
中文翻译：
观赏单子叶植物在水培系统中对镉和锌根际过滤的潜力
镉（Cd）和锌（Zn）的积累和摄取能力已在三个观赏单子叶植物进行了研究（鹦黄赫蕉X ħ。spathocircinata，Echinodorus cordifolius和梭鱼草）在水培系统中生长。发现在最高重金属处理所有研究的植物是排除器为Cd和Zn，在根中发现100.最高Cd和Zn积累易位因子值<1个生物富集因子（BCF）值> E. cordifolius（4766.6毫克锌千克-1和6141.6毫克镉千克-1），接着ħ。鹦鹉x H。Spathocircinata（4313.5 mg Zn kg -1）和Cord。P. cordata（3673.3 mg Cd kg -1），而芽的表现较低。然而，与本研究中的其他两个植物物种相比，P。cordata的干生物量最低。由于稀释的影响，所有研究植物的重金属累积量在联合重金属处理中均低于单独使用Cd和Zn的处理。在实验结束时，在psittacorum x H中发现了Cd和Zn的最高吸收量。spathocircinata（10 mg Zn L -1溶液中62.1％Zn 2+）和E. cordifolius（2 mg Cd L -1溶液中27.3％Cd 2+）。在P. cordata中发现较低的金属吸收率; 因此，E. cordifolius和H. psittacorum X ħ。spathocircinata显然更适合从受污染的水和水培系统中去除Cd和/或Zn。
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