1998
DOI: 10.1080/01496399808545007
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Removal of Lead in a Fixed-Bed Column Packed with Activated Carbon and Crab Shell

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Cited by 31 publications
(12 citation statements)
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“…However, as Lee et al [23] suggested that total released Ca 2+ was not contributed only through CaCO 3 dissolution, the ion-exchange between Ca 2+ and tested metal ions also promoted Ca 2+ release in their study with Pb 2+ removal by crab carapace. On the other hand, the released CO 3 2− reacted with proton to form HCO 3 − and H 2 CO 3 , hence improved solution pH [23,28,34,35]. Therefore Zn 2+ removal was resulted in the formation of metal-carbonate precipitates such as ZnCO 3 ·2Zn(OH) 2 ·H 2 O [37].…”
Section: Effect Of Agitation Speed and Contact Timementioning
confidence: 99%
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“…However, as Lee et al [23] suggested that total released Ca 2+ was not contributed only through CaCO 3 dissolution, the ion-exchange between Ca 2+ and tested metal ions also promoted Ca 2+ release in their study with Pb 2+ removal by crab carapace. On the other hand, the released CO 3 2− reacted with proton to form HCO 3 − and H 2 CO 3 , hence improved solution pH [23,28,34,35]. Therefore Zn 2+ removal was resulted in the formation of metal-carbonate precipitates such as ZnCO 3 ·2Zn(OH) 2 ·H 2 O [37].…”
Section: Effect Of Agitation Speed and Contact Timementioning
confidence: 99%
“…Recently, it has been recognised that crab carapace has significant potential as a biosorbent for metal removal after simple pre-treatment [4,[24][25][26][27][28][29][30][31][32][33]. For example, the uptake of Pb 2+ by crab carapace (Protunus trituberculatus) has been reported to be 1300 mg/g [34,35]. An et al [36] evaluated the capacity of crab carapace (Chinonecetes opilio) to treat several heavy metal ion solutions (Pb 2+ , Cd 2+ , Cu 2+ and Cr 2+ ) and demonstrated that crab carapace was more efficient than cation exchange resin, zeolite and powdered or granular activated carbon.…”
Section: Introductionmentioning
confidence: 99%
“…This material may be used either as such or with the surface modified chemically to enhance its adsorption capacity for metallic ions such as Pb 2þ ion in aqueous solution [3][4][5][6][7][8][9][10][11][12][13]. In previous reports, an account was given of the introduction of sulfur in activated carbon [14] and of the ability of resultant products to adsorb Hg 2þ [14], Pb 2þ [15], Cd 2þ [16], or the three ions [17] from aqueous solution.…”
Section: Introductionmentioning
confidence: 99%
“…Heavy metals, well-known as carcinogenic, have been removed by various *Corresponding author methods such as chemical precipitation [1], ion exchange [2][3][4], biosorption [5,6], nanofiltration [7][8][9], and reverse osmosis [10]. However, anionic pollutants such as ferriecyanide, chromate, and nitrate have quite different characteristics to cationic pollutants such as heavy metals.…”
Section: Introductionmentioning
confidence: 99%