ACCUMULATION AND RETENTION OF LEAD BY CATTAIL (TYPHA DOMINGENSIS), HYDRILLA (HYDRILLA VERTICILLATA), AND DUCKWEED (LEMNA OBSCURA)

Abstract

Investigation of lead levels in Delaney Creek, which flows through a former lead-acid battery manufacturing and disposal site in Tampa, FL, revealed low but significant lead levels in the water and sediments along the creek, Known phytoaccumulator plants populate certain locations within the creek and adjacent wetlands. Three representative plants from the study site--cattail (Typha domingensis Pers.), hydrilla (Hydrilla verticillata Royle), and duckweed (Lemna obscura L.)--were investigated for their potential to remove lead from contaminated waters under the controlled conditions of a phytotron room. The plants were collected at the site and cultured in hydroponic medium under conditions that mimicked their natural environment (26 degrees C and 80% humidity). Results indicate that, of the three species, duckweed and hydrilla achieve high lead removal efficiencies after a short exposure period (98% removal using hydrilla, 97% with duckweed after one week of exposure) while cattail appears to be less efficient than the other two species. The kinetic rates of lead removal were studied for Lemna obscura.

Safety of Novel Protein Sources (Insects, Microalgae, Seaweed, Duckweed, and Rapeseed) and Legislative Aspects for Their Application in Food and Feed Production

“…For instance, crayfish fed with cadmium‐containing duckweed were contaminated with cadmium (Arrhenius and others ). Accumulation of heavy metals from water includes cadmium (Gaur and others ; Boonyapookana and others ; Arrhenius and others ; Seth and others ; Razinger and others ; Derksen and Zwart ), selenium (Zayed and others ), copper (Jain and others ; Gaur and others ; Chandra and Kulshreshtha ; Miretzky and others ; Razinger and others ; Kanoun‐Boulé and others ; Derksen and Zwart ), chromium (Staves and Knaus ; Gaur and others ; Boonyapookana and others ; Chandra and Kulshreshtha ; Miretzky and others ; Derksen and Zwart ), nickel (Gaur and others ; Axtell and others ; Derksen and Zwart ), lead (Gaur and others ; Gallardo‐Williams and others ; Axtell and others ; Miretzky and others ; Derksen and Zwart ; Sobrino and others ), zinc (Gaur and others ; Miretzky and others ; Derksen and Zwart ; Hoving and others ), cobalt (Gaur and others ), iron (Jain and others ; Chandra and Kulshreshtha ; Miretzky and others ; Derksen and Zwart ), arsenic (Seth and others ; Rahman and others ; Hoving and others ; Rahman and Hasegawa ; Hoving and others ), uranium (Hogan and others ), manganese (Miretzky and others ; Derksen and Zwart ), aluminum, gold, and strontium (Derksen and Zwart ). Duckweed has been demonstrated to be a good accumulator of cadmium, selenium, and copper, a moderate accumulator of chromium, and a poor accumulator of nickel and lead (Zayed and others ).…”

Effects of Lead on Plant Growth, Lead Accumulation and Phytochelatin Contents of Hydroponically-Grown <i>Sesbania </i><i>E</i><i>xaltata</i>

“…Although Pb has no known functions in biological systems, it can impact the central nervous system especially in children leading to reduced growth of the brain [6]. It is generally ranked the number one heavy metal pollutant and number two of all hazardous substances by the Agency for Toxic Substances and Disease Registry [7,8].…”

Temporary freshwater wetlands floristics in central Mexico highlands

“…Egeria densa can remove heavy metals from the environment (Tsuji et al 2017), as can Eleocharis aciculares, E. macrostachya, and, E. montana (Ha et al 2011, Olmos-Márquez et al 2012. Lemna gibba, L. obscura, L. minuta are indicated for phytoremediation of contaminated water (Gallardo-Williams et al 2002, Gür et al 2016, Di-Baccio et al 2017.…”