Uptake of mercury from aqueous solution by duckweed: The effects of pH, copper and humic acid

Mo, Shucheng; Choi, Dong-Hwan; Robinson, James W.

doi:10.1080/10934528909375470

Cited by 31 publications

(24 citation statements)

References 4 publications

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“…However, Zhu et al ( 1999 ) suggest that the effi ciency of the process can be increased by using plants with a heightened ability to absorb and translocate metals. Several aquatic species have the ability to remove heavy metals from water, including water hyacinth ( Eichhornia crassipes , Zhu et al 1999 ), pennywort ( Hydrocotyle umbellata L., Dierberg et al 1987 ), and duckweed ( Lemna minor L., Mo et al 1989 ). However, these plants have limited potential for rhizofi ltration because they are not effi cient in removing metals as a result of their small, slow-growing roots .…”

Section: Phytofi Ltrationmentioning

confidence: 99%

Phytoremediation Using Algae and Macrophytes: I

2015

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Section: Phytofi Ltrationmentioning

confidence: 99%

Phytoremediation Using Algae and Macrophytes: I

2015

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“…Aquatic flowering plants such as water hyacinth (Eichhornia crassipec (Mart.) Solms) (Falbo and Weaks 1990;Kay et al 1984;Turnquist et al 1990), pennywort (Hydrocotyle umbellate L.) (Dierberg et al 1987) and duckweed (Lemna minor L.) (Mo et al 1989) can remove various heavy metals from water. However, the efficiency of metal removal by these plants seemed to be low because of their relatively small size and small slow-growing roots.…”

Section: Introductionmentioning

confidence: 97%

Effects of selected heavy metals (Pb, Cu, Ni, and Cd) in the aquatic medium on the restoration potential and accumulation in the stem cuttings of the terrestrial plant, Talinum triangulare Linn

et al. 2009

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The heavy metal (Cu, Pb, Ni, and Cd) accumulation capacity of the stem cuttings of the terrestrial, ornamental plant, Talinum triangulare was assessed in hydroponic medium. The stem cuttings of T. triangulare, grew well in distilled water regenerating roots and aerial parts. On exposure to various concentrations of Cu, Pb, Ni, and Cd, a concentration dependent decrease was observed in the number of leaves produced and roots regenerated and an increase in the number of days required for the initiation of roots. The number of leaves produced showed an increasing trend in almost all treatment concentrations of Cu, Pb, Ni, and Cd with an increase in the duration of experiment, whereas, with an increase in the treatment concentration of metals a significant (P < 0.05) decrease was observed in the number of leaves produced. The number of days required for root initiation in metal solutions, however, increased with increasing concentration of Cu, Pb, Ni, and Cd. The root development was completely arrested from 10 mg l(-1) of Ni and 4 mg l(-1) of Cd. Compared to the control, a significant decrease was recorded in the number of roots produced in all treatment concentrations of Cu, Pb, Ni, and Cd. Pink colouration of metal solution consequent to leaching of plant pigment from T. triangulare was observed which was not persistent and disappeared after a few days. Decaying of stem was observed when exposed to Ni and Cd but not to Cu and Pb. Although, copper accumulation by T. triangulare at treatment concentration of 15 and 20 mg l(-1) exceeded 1,000 mg kg(-1) dry matter, necessary pot culture experiment is required before "T. triangulare" can be definitely classified as a Cu hyperaccumulator.

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“…Several aquatic species have the ability to remove heavy metals from water, including water hyacinth [Eichhornia crassipes (Mart.) Solms] (Kay et al, 1984;Zhu et al, 1999), pennywort (Hydrocotyle umbellata L.: Dierberg et al, 1987) and duckweed (Lemna minor L.: Mo et al, 1989).…”

Section: Rhizofiltrationmentioning

confidence: 99%