Chromium-6 in addition to Bioremediation What is Cr-6 The Study Using Water Lilies as long as Bioremediation How is the metal absorbed
Whitney, Daisy, Contributing Writer has reference to this Academic Journal, PHwiki organized this Journal Chromium-6 in addition to Bioremediation O HO-Cr-OH O Paula Warren What is Cr-6 Cr-6 is one of the most commonly occurring toxic pollutants present in wastewaters discharged from electroplating, dye in addition to pigment manufacturing, wood preserving in addition to leather tanning industries. Cr-6 is not only highly toxic, but also is mobile in addition to has a long residence time in surface in addition to groundwater. It poses a health risk to humans in addition to animals, in addition to impairs the development in addition to growth of most plants. The main chemical dealt with in the Erin Brockovich toxic water case was Cr-6. O O O = Cr O + oxidizing agent = O = Cr = O O O The Study Choo T P; Lee C K; Low K S; Hishamuddin O Accumulation of chromium (VI) from aqueous solutions using water lilies (Nymphaea spontanea). Chemosphere (2006), 62(6), 961-7. Journal code: 0320657. ISSN:0045-6535. PubMed ID 16081131 AN 2006069706 In-process as long as MEDLINE Water lilies were found to be able to survive in waters containing heavy metals. They are aesthetically pleasing, in addition to do not interfere with crops on irrigated l in addition to or with fish production.
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Using Water Lilies as long as Bioremediation The night bloomer tropical water lily (Nymphaea spontanea) have extensive roots in addition to provide large surface area as long as the biofilm as long as mation (the slimy layer) in addition to thus enhance the microbial activities. Water lilies are able to extract the Cr-6 from the wastewater. The study shows how effective this method is. How is the metal absorbed -Plasma membrane in addition to Passive Diffusion Passive diffusion is the simplest transport process as molecules moves across membrane without the help of any specific transport system. Molecules move across membrane in addition to set up an equilibrium of concentration (driven by entropy considerations) Metal ions are adsorbed on the cell walls via passive diffusion or moved from the roots to the apex of the plant. Results Cr-6 solutions at [ ] of 1, 2.5, 5, in addition to 10 mg/l were used in the study to assess the metal accumulation of water lilies. pH=6.0-6.5. Also used a metal solution with Cu in addition to Cr-6, since Cu commonly occurs with Cr-6 in electroplating wastewater. With an increasing metal [ ], the water lily increased the amount of Cr-6 it took up. ~16% uptake of its dry weight! % uptake= (Co Ce/Co) x 100% Co = [initial] , Ce = [remaining Cr-6]
Removal of Cr-6 by water lilies after 7 days exposure (Table 1) Table 1. Removal of Cr(VI) by water lilies after seven days exposure Initial Cr(VI) concentration Cr(VI) concentration in plants Concentration factor (mg/l) (mg/g dry weight) a 1.0 0.775 ± 0.022 946 2.5 1.374 ± 0.099 655 5.0 1.467 ± 0.063 319 10.0 2.119 ± 0.093 225 a= Mean of three replicates ± st in addition to ard error. So, there was an increased amount of Cr-6 a cumulated by the water lily with the increase of metal concentration. As the plant was introduced to more metal in addition to Cr-6, it was able to continue to absorb at a higher amount. Uptake of Cr-6 by water lilies exposed to different initial [Cr-6]. Fig. 1 Uptake of Cr(VI) by water lilies exposed to different initial Cr(VI) [ ]s. -initial [ ] 1.0 mg/l; -initial [ ] 2.5 mg/l; -initial [ ]5 mg/l; -initial [ ] 10 mg/l. Cr-6 uptake increased in all the treatments (Cr-6 alone, both Cr-6 in addition to Cu-2(bianary metal), in addition to electroplating waste) as long as the first 5 days in addition to then remained constant as long as the binary metal in addition to the waste solutions, but continued to increase uptake in the singe metal solution. Cr(VI) accumulation by water lilies subjected to different treatments. single metal solution containing 2.5 mg/l Cr(VI); binary metal solution, waste solution, both containing 2.5 in addition to 0.5 mg/l Cr(VI) in addition to Cu(II), respectively; metal free control.
Using water lilies could be an effective, aesthetic way to reduce the harmful substance of Cr-6 from wastewater in addition to electroplating refuge. Water lilies were observed to assist in bioremediation of this toxic chemical while still remaining healthy. May not be the Most effective resource as long as bioremediation, but it does not creep up on crops like duckweed does. Would be worth investing a small amount of $$ in to help reduce the amount of heavy metals in the wastewater, in addition to to help reduce other, more costly methods of removed these metals. The Study: Choo T P; Lee C K; Low K S; Hishamuddin O Accumulation of chromium (VI) from aqueous solutions using water lilies (Nymphaea spontanea). Chemosphere (2006), 62(6), 961-7. Journal code: 0320657. ISSN:0045-6535. PubMed ID 16081131 AN 2006069706 In-process as long as MEDLINE Conclusion
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