2011
DOI: 10.1002/ep.10595
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Studies on adsorption of cr(vi) onto strychnos potatorum seed from aqueous solution

Abstract: The removal of Cr(VI) from aqueous solution using the seeds of the plant species Strychnos potatorum was studied. The plant is popularly known as Nirmali tree, grown all over India. The dried Nirmali seeds were powdered and used as adsorbent. The SEM‐EDX and FT‐IR spectrum of the adsorbent revealed that the powder is fibrous in nature and contains functional groups such as —OH and —COOH. The zeta potential measurements indicated negative surface charge beyond the pH of 1.50. Batch type experiments were conduct… Show more

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Cited by 21 publications
(7 citation statements)
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“…This is because increasing the salt concentration increased the number of interfering nitrate or chloride ions in the solution, enhancing competition for the jackfruit seed powder adsorption sites. Similar trend of results were obtained as per [14].…”
Section: Effects Of Interfering Ionssupporting
confidence: 89%
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“…This is because increasing the salt concentration increased the number of interfering nitrate or chloride ions in the solution, enhancing competition for the jackfruit seed powder adsorption sites. Similar trend of results were obtained as per [14].…”
Section: Effects Of Interfering Ionssupporting
confidence: 89%
“…This may be attributed to ion exchange between jackfruit seed powder surface and matrix interface. It may also be due to the adsorption of chromate ion by ion exchange mechanism as depicted in the equations below [14]. …”
Section: Effect Of Initial Phmentioning
confidence: 99%
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“…Alternative adsorbents were investigated in search for an effective low-cost technology for the treatment of Cr (VI). Bioadsorbents, e.g., brewers draff, grape waste, peat moss, sawdust, fruit peel [4,5] and nature materials, such as akadama clay, sawdust, and parthenium hysterophorus weed [6][7][8] were used due to low-cost, local availability and minimal pre-treatment requirements but the efficiency for Cr (VI) removal is relatively low with equilibrium adsorption capacity smaller than 50 mg L À1 ; Modified natural materials, e.g., modified lignocellulosic materials, activated alumina, organo-bentonite and chitosan [9][10][11][12], are common Cr (VI) adsorbents as well. Active carbon is a widely utilized absorbent in Cr (VI) adsorption for its large volume of micropores and mesopores, providing a high surface area and having high chemical and thermal stability [13][14][15].…”
Section: Introductionmentioning
confidence: 99%
“…As the concentration of chromium (VI) ions was increased, their competition for the PRS bio-char active sites increased, and the chance of the ions getting adsorbed decreased which in turn reduces the adsorption percentage [8]. However, increase in the chromium (VI) concentration increased the adsorption capacity (holding capacity of the bio-char) due to the increase in the availability of chromium (VI) ions on the interface which enhanced the degree of holding the chromium (VI) ions by the adsorbent [21].…”
Section: Effect Of Varying Chromium (Vi) Concentrationmentioning
confidence: 99%