Eichhornia crassipes

Roy S, O Hanninen (1994) Pentachlorophenol uptake/elimination kinetics and metabolism in an aquatic plant Eichhornia crassipes. Environ Toxicol Chem 13 763-773. 

Gude, S.M. and Das, S.N., Adsorption of chromium(VI) from aqueous solutions by chemically treated water hyacinth Eichhornia crassipes, Indian Journal of Chemical Technology, 15 (1), 12-18, 2008. 

Water hyacinth, Eichhornia crassipes from sewage lagoon in Bay St. Louis, Mississippi Leaves 70.0 DW 2... 

The water hyacinth Eichhornia crassipes originates from Brazil, and although it represents one of the most troublesome and invasive of water weeds, it is also one of the best phytoremediants of polluted water. The biomass becomes saturated with pollutants, which can then be removed from the water by harvest of the biomass and its composting, a process which achieves a substantial reduction in the mass requiring further processing (e.g., incineration under controlled conditions). The species is highly susceptible to frost, but in frost-free environments, its introduction is risky as it can readily become uncontrollable. 

Eichhornia crassipes water hyacinth water hyacinth... 

Toki, K. et al., (Delphinidin 3-gentiobiosyl) (apigenin 7-glucosyl) malonate from the flowers of Eichhornia crassipes, Phytochemistry, 36, 1181, 1994. 

The occurrence of the diester structures of the malonic acid moiety in natural anthocyanin pigments has so far been reported in pigments from flowers of Eichhornia crassipes and chive. Allium schoenoprasum, where the anthocyanin-flavone and anthocyanin-flavonol disubstituted malonate structures were exhibited, respectively (Figure 10.8 and Figure 10.9). In some anthocyanins from flowers of Anemone coronaria, malonic acid is esterified with galactose in one end and tartaryl in the other end. ... 

Water hyacinth (Eichhornia crassipes) roots (dried) sorbent Wood (maple) ash sorbent... 

Table 1 Percentage reduction in fresh weight of water hyacinth (Eichhornia crassipes.) due to various plant products. (Kannan, 2002)a.

To determine the effects of the deprivation of specific micronutrients on the water hyacinth (Eichhornia crassipes), Colley et al. (1979) studied the rate of uptake of iron and manganese in comparison with phosphorus. Results indicated that all three elements were actively absorbed by the root systems, but the rates of absorption differed markedly. The rate of absorption of manganese by roots was 13 and 21 times that for radio-iron and -phosphorus, and iron was taken up by the roots at nearly twice the rate of phosphorus. Manganese translocation appeared to be faster than phosphorus translocation by an order of magnitude and 65 times faster than iron translocation. 

EPS was used to show that Pt on precipitates on the surfaces of roots of Eichhornia crassipes grown in nutrient with added (NH4)2[PtCl6] was Pt(IV) and had not been reduced by the roots (Parsons and Farago, 1987). The technique was used to study Al on the surfaces or barley roots, in Al-sensitive and tolerant plants grown in the presence of Al. Al-tolerant roots contained 21 °7o Al as the phosphate, whereas the sensitive roots contained only 1.3% Al (Millard et al., 1990). The method which is useful... 

Pentachlorophenol is metabolized by the aquatic plant Eichhornia crassipes to a number of metabolites including di-, tri-, and tetra-chlorocatechol, 2,3,5-tri- and tetrachlorohydroquinone, pentachlo-roanisole, and tetrachloroveratrole (Roy and Hanninen 1994). The phenolic compounds should be compared with those produced during the photochemical (see Figure 4.4) and the initial stages in the microbiological metabolism of pentachlorophenol (Chapter 6, Section 6.5.1.2), followed by O-methylation (Section 6.11.4). 

Farago me and Parsons PJ (1994) The effects of various platinum metal species on the water plant Eichhornia crassipes (MART.) Sobns Chem Spec Bioavail 6 1-12. 

FIGURE 4.16 Diurnal variations in pH of water in selected aquatic systems containing water hyacinth (Eichhornia crassipes [Mart] Solms), cattails (Typha latifoUa L.) and Egeria (Egeria densa), and control (no macrophytes but contained algae). (Reddy and Patrick, 1984.)... 

Aquatic species were also found to be hyperaccumulators in wetland ecosystems (Williams, 2002). Ceratophyllum demersum is described as an arsenic accumulator (Kalbitz and Wenrich, 1998), whereas water hyacinths, Eichhornia crassipes, have been found to be effective in accumulating cadmium, lead, and mercury, and in the uptake of pesticides residues. Duckweed Lemna minor) and water velvet (Azolla pinnata) were both found to effectively remove iron and copper at low concentrations in laboratory experiments, and also cadmium. The yellow water lily (Nuphar variegatum) accumulated copper and zinc. 

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