Removal of phenol using water hyacinth in a continuous unit

Vaidyanathan, Seetharaman; Kavadia, K. M.; Rao, M . Guruprasada; Basu, Somnath; Mahajan, Surabhi

doi:10.1080/00207238308710075

Cited by 8 publications

(3 citation statements)

References 3 publications

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“…The weed also has the capacity to remove heavy metals from water.17,20 It is reported that water hyacinth is also capable of removing phenols from polluted water. 21,22 Recently11 studies performed on water hyacinth showed PCP removal occurred at a concentration of 2 mol dm~3 (0É532 mg dm~3). In our studies, water hyacinth, when used to remove PCP, did not survive at PCP concentrations above 20 mg dm~3.…”

Section: Isolation Of Vt-1mentioning

confidence: 99%

Degradation of Pentachlorophenol by Microalgae

Tikoo

Scragg

Shales

1997

J. Chem. Technol. Biotechnol.

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A microalga (VT-1) was isolated from pentachlorophenol (PCP) treated water. Its growth and PCP tolerance was compared with two known strains of Chlorella and it was found to be more tolerant with an (24È IC 50 25 mg dm~3) value twice that of C. vulgaris. The ability of VT-1 to degrade PCP was tested using uniformly labelled PCP, and was released, indicating 14CO 2 mineralisation.was not released in the presence of the other microalgae 14CO 2 and only occurred in the light. Release was also stimulated by the presence of glucose in the light.

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Section: Isolation Of Vt-1mentioning

confidence: 99%

Degradation of Pentachlorophenol by Microalgae

Tikoo

Scragg

Shales

1997

J. Chem. Technol. Biotechnol.

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“…Water hyacinths, Eichhornia crassipes, in open water units were tested by several researchers (Wolverton & McKown 1976;O'Keeffe et al 1987). Vaidyanathan et al (1983) measured 89% phenol removal at 75 mg/L influent concentration, whereas unplanted control units achieved only 13% removal. The purification performance improved over 13 days and remained stable after this time.…”

Section: Introductionmentioning

confidence: 99%

Elimination of phenols, ammonia and cyanide in wash water from biomass gasification, and nitrogen recycling using planted trickling filters

Graber

Skvarc

Junge

2009

Water Science and Technology

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Trickling filters were used to treat wash water from a wood gasifier. This wash water contained toxic substances such as ammonium, cyanide, phenols, and PAH. The goal was to develop a system that degraded toxic substances, and achieved full nitrification of ammonia. A 1 kW model wood gasifier plant delivered wash water for the experiments, which was standardised to a conductivity of 3 mS/cm by dilution. Toxicity was assessed by bacterial luminescence detection, germination test with cress (Lepidium sativum), and pot plants cultivated in a hydroponic setup irrigated continuously with the wastewater. Treatment experiments were done in both planted and unplanted trickling filters. Plant yield was similar to conventional hydroponic production systems. The trickling filters achieved complete detoxification of phenol, PAH and cyanide as well as full nitrification. The specific elimination rates were 100 g m(-3) Leca d(-1) for phenols and 90 g m(-3) Leca d(-1) for ammonium in planted systems. In unplanted trickling filters circulated for 63 h, phenol concentration decreased from 83.5 mg/L to 2.5 mg/L and cyanide concentration from 0.32 mg/L to 0.02 mg/L. PAH concentrations were reduced from 3,050 microg/L to 0.89 microg/L within 68 days. The assays demonstrated the feasibility of using the technique to construct a treatment system in a partially closed circulation for gasifier wash water. The principal advantage is to convert toxic effluents from biomass gasifiers into a non-toxic, nitrogen-rich fertiliser water, enabling subsequent use in plant production and thus income generation. However, the questions of long-term performance and possible accumulation of phenols and heavy metals in the produce still have to be studied.

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“…The plant posses dense highly branched, fibrous root system, it floats on water, and has been shown to tolerate low nutrient concentration (Ukiwe & Ogukwe, 2007). E. crassipes has been tested by several researchers for its ability to adsorb aromatic hydrocarbons in effluents (Wolverton & Mckown, 1976;O'Keeffe, Wiese, Brummet, & Miller, 1987;Vaidyanathan, Kavadia, Rao, Basu, & Mahajan, 1983). These studies all demonstrated that the purification performance of the effluent improved by over 89% and that the root of the plant played a critical role in the rhizoremediation process.…”

Section: Introductionmentioning

confidence: 99%

Degradation of Polycyclic Aromatic Hydrocarbons from Soil Leachate by Water Hyacinth (Eichhornia crassipes)

Ukiwe¹,

Egereonu²,

Njoku³

et al. 2012

IJC

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The ability of water hyacinth (Eichhornia crassipes) to adsorped polycyclic aromatic hydrocarbons from contaminated soil leachate was examined. Results obtained from analysis using GC/FID indicated that naphthalene (8.350 ?g/g) was the overall highest polycylic aromatic hydrocarbon adsorped at pH 4.0, while pyrene (0.057 ?g/g) was the least adsorped polycyclic aromatic hydrocarbon overall at pH 6.0. In ascending the pH from 2.0 to 6.0, there wasn’t any trend observed in PAH degradation, though, it was noted that polycyclic aromatic hydrocarbons degradation increased from pH 2.0 to 4.0, and then, sharply decreased at pH 6.0. This results thus lend credence to the fact that E. crassipes is a potential phytoremediator in removing polycyclic aromatic hydrocarbons from contaminated waste streams.

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Removal of phenol using water hyacinth in a continuous unit

Cited by 8 publications

References 3 publications

Degradation of Pentachlorophenol by Microalgae

Degradation of Pentachlorophenol by Microalgae

Elimination of phenols, ammonia and cyanide in wash water from biomass gasification, and nitrogen recycling using planted trickling filters

Degradation of Polycyclic Aromatic Hydrocarbons from Soil Leachate by Water Hyacinth (Eichhornia crassipes)

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