Lead, Chromium and Manganese Removal by in Vitro Root Cultures of Two Aquatic Macrophytes Species:Typha LatifoliaL. andScirpus AmericanusPers.

Abstract

The ability of in vitro roots cultures of Typha latifolia and Scirpus americanus to remove metals was studied. Roots were cultivated on Murashige-Skoog medium with 15 microg L(-1) Cr 11, 60 microg L(-1) Pb II or 1.8 mg L(-1) Mn II. Adsorbed metal to root surface was removed by washing with 0.042% HNO3. T. latifolia roots were able to uptake 68.8 microg Pb g(-1), 22.1 microg Cr g(-1) and 1680 microg Mn g(-1), while the S. americanus roots removed 148.3 microg Pb g(-1), 40.7 microg Cr g(-1) and 4037 microg Mn g(-1). About 80-90% of Pb and Cr were absorbed in both cultures. On the contrary, the Mn removal was due mainly to an adsorption process (82-86%). In comparison to the T. latifolia cultures, S. americanus cultures were twofold more efficient to remove Pb and Cr, and threefold more efficient to remove Mn. Both plant species capture metals in the following order: Cr >Pb >Mn. This investigation confirms that in vitro roots cultures could be an alternative as a phytoremediation approach for contaminated water with heavy metals.

Enhanced Cd-Accumulation in Typha latifolia by Interaction with Pseudomonas rhodesiae GRC140 under Axenic Hydroponic Conditions

“…Heavy metal toxicity in plants is closely related to their bioavailability in the hydroponic solution and is influenced by pH, organic matter, ligands, and heavy metal chemical speciation [ 25 ]. Complete MS medium has been previously used to evaluate Pb, chromium (Cr), and manganese (Mn) removal by in vitro root culture of T. latifolia [ 26 ]. In this work, a diluted MS medium (0.2× strength) without glucose was used to ensure Cd bioavailability in the liquid medium.…”

Biosorption of methylene blue from aqueous solutions by Typha angustata phytomass

“…Moreover, it cannot be eradicated with the application of pesticides due to its pest resistance (Mahmood 2005). However, the cattails have shown their phytoremediation ability to remove various contaminants from the aquatic environment (Dordio et al 2010;Santos-Diaz and Barron-Cruz 2011). Cattail phytomass (CP) can bioaccumulate high levels of heavy metals in its tissues without any serious physiological damage (Hegazy et al 2011).…”