Adsorptive Removal of Co and Sr Ions from Aqueous Solution by Synthetic Hydroxyapatite Nanoparticles

Ma, Bin; Shin, Won Sik; Oh, Sanghwa; Yeonjin, Park; Choi, Sang-June

doi:10.1080/01496390903484941

Cited by 43 publications

(32 citation statements)

References 35 publications

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“…where C 0 (mmol L −1 ) is the initial metal concentration. The R L values (-) indicate the type of isotherm to be favorable (0 < R L < 1), or irreversible (R L = 0; [25]). The DR model is used to identify whether the sorption mechanism occurs through a physical or chemical process [24]:…”

Section: Single Sorption Modelsmentioning

confidence: 99%

“…where E is used to differentiate the sorption mechanism. The value between 8 and 16 kJ mol −1 indicates the domination of the ion exchange mechanism, while the E value < 8 kJ mol −1 indicates physical force and > 16 kJ mol −1 , the chemical process as the dominant sorption mechanisms [25]. The Sips model is a combination of the Freundlich and Langmuir isotherms and can be used to represent the equilibrium sorption data [26,27]:…”

Section: Single Sorption Modelsmentioning

confidence: 99%

“…In this study, the Langmuir model was used to predict the binary sorption data by calculating the ratio of the sorption capacity of the corresponding metal ion in the single sorption system (q mL ) to the sorption capacity of one metal ion in the binary sorption system (q * mL ). Then, the competition effect can be interpreted as follows: if the ratio is less than 1, the sorption is enhanced by the presence of the other metal ion; if the ratio is equal to 1, no competition effect is observed; if the ratio is greater than 1, the competition is preceded [25].…”

Section: Binary Sorptionmentioning

confidence: 99%

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The Influence of Salinity on the Removal of Ni and Zn by Sorption onto Iron Oxide- and Manganese Oxide-Coated Sand

2020

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The influence of salinity on the single and binary sorption of Ni and Zn onto iron oxide- and manganese oxide-coated sand (IOCS and MOCS) was investigated at pH = 5. The single sorption experimental data were fitted to Freundlich, Langmuir, Dubinin–Radushkevich, and Sips models, and a nonlinear sorption isotherm was observed (NF = 0.309–0.567). The higher Brunauer–Emmett–Teller (BET) surface area (ABET) and cation exchange capacity (CEC) of MOCS contributed to the higher maximum sorption capacities (qmL) of Ni and Zn than that of IOCS. The Ni sorption capacities in the single sorption were higher than that in the binary sorption, while the Zn sorption capacities in the single sorption were less than that in the binary sorption. The single and binary sorptions onto both IOCS and MOCS were affected by the salinity, as indicated by the decrease in sorption capacities. Satisfactory predictions were shown by the binary sorption model fitting including P-factor, ideal adsorbed solution theory (IAST)–Freundlich, IAST–Langmuir, and IAST–Sips; among these, the P-factor model showed the best fitting results in predicting the influence of salinity of Ni and Zn in the binary sorption system onto IOCS and MOCS. IOCS and MOCS offer a sustainable reactive media in a permeable reactive barrier (PRB) for removing Ni and Zn in the presence of salinity.

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Section: Single Sorption Modelsmentioning

confidence: 99%

Section: Single Sorption Modelsmentioning

confidence: 99%

Section: Binary Sorptionmentioning

confidence: 99%

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The Influence of Salinity on the Removal of Ni and Zn by Sorption onto Iron Oxide- and Manganese Oxide-Coated Sand

2020

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“…The experimental data obtained in this study are in good agreement with the Langmuir isotherm 1248 model with correlation coefficient higher than 0.99 (r 2 ¼ 0.99) which suggests the applicability of this model to the investigated adsorption system. Table 2 shows the comparison of the maximum adsorption capacity of Sr 2þ on SOJR with those reported in literatures (22)(23)(24)(25)(26), which clearly demonstrates that SOJR exhibits the highest adsorption capacity for Sr 2þ than other adsorbents listed, indicating that it can be a promising material for the treatment of Sr 2þ polluted water.…”

Section: Adsorption Isothermmentioning

confidence: 66%

Adsorptive Removal of Strontium from Water by using Chemically Modified Orange Juice Residue

Paudyal

Pangeni

Inoue

et al. 2014

Separation Science and Technology

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Adsorbent for strontium (Sr 2þ ) ion removal was prepared from orange waste generated in an orange juice factory. The orange juice residue (OJR) was treated with lime water to prepare saponified orange juice residue (SOJR). The energy dispersive X-ray (EDX) spectroscopic analysis revealed that substitution of Ca 2þ ions in SOJR by Sr 2þ ions takes place during the adsorption process. The adsorption of Sr 2þ ions onto SOJR was fast and strongly pH dependent. Maximum adsorption occurred at pH higher than 5. The adsorption isotherm study showed maximum adsorption capacity of SOJR for Sr 2þ ion was 833.4 mmol/kg. Equimolar amount of Ca 2þ was found to be released from SOJR during Sr 2þ adsorption also indicating that adsorption of Sr 2þ on SOJR takes place according to the Ca 2þ substitution reaction by cation exchange mechanism. Thus, the adsorption gel prepared in this study can be a promising adsorbent to remove Sr 2þ from aqueous solution.

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“…These results have to be compared to the work done on hydroxyapatite when used to remove Ni, Cu, Co, Zn, Cd or Pb ions from solutions (26)(27)(28)(29)(30)(31)(32)(33). In these cases, metal ion retention occurs without any change of hydroxyapatite structure, disqualifying the dissolution-precipitation process as the dominant mechanism for this phosphate.…”

Section: Discussionmentioning

confidence: 99%

Use of calcium phosphates to remove nickel, copper and cobalt ions from aqueous solutions

Lizoul¹,

Kzaiber²,

Chemaa³

et al. 2019

IJCTR

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This work concerns the use of amorphous tricalcium phosphate and apatitictricalcium phosphate to remove nickel, copper and cobalt ions from aqueous solutions. The amorphous or apatitic calcium phosphates were first exposed to separate solutions of Ni(II), Cu(II) or Co(II) salts for 48 hours at room temperature, then residual solids and solutions were separated and analysed. X-ray photoelectron spectroscopy, X-ray diffraction and infrared spectroscopy were applied to observe chemical and structure modifications in the solid phosphates whereas inductively coupled plasmaatomic emission spectrometry measurements were performed to evaluate the metal ions content changes in both solids and solutions. These analyses and measurements demonstrate the ability of amorphous and apatitic phosphates to remove metal ions from aqueous solutions. They assist in identifying the mechanisms involved in the metal ions transfer from solutions to solid phosphates and clarifying differences with respect to the widely studied hydroxyapatite system. Finally, they reveal, for copper and cobalt ions, the conversion of these phosphates to Cu 2 (PO 4)(OH) and Co 3 (PO 4) 2 .8H 2 O.

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Adsorptive Removal of Co and Sr Ions from Aqueous Solution by Synthetic Hydroxyapatite Nanoparticles

Cited by 43 publications

References 35 publications

The Influence of Salinity on the Removal of Ni and Zn by Sorption onto Iron Oxide- and Manganese Oxide-Coated Sand

The Influence of Salinity on the Removal of Ni and Zn by Sorption onto Iron Oxide- and Manganese Oxide-Coated Sand

Adsorptive Removal of Strontium from Water by using Chemically Modified Orange Juice Residue

Use of calcium phosphates to remove nickel, copper and cobalt ions from aqueous solutions

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