Adsorptive removal of Pb(II) ions from polluted water by newly synthesized chitosan–polyacrylonitrile blend: Equilibrium, kinetic, mechanism and thermodynamic approach

Anitha, T.; Kumar, P. Senthil; Kumar, K. Sathish; Ramkumar, B.; Ramalingam, Subramanian

doi:10.1016/j.psep.2015.07.012

Cited by 82 publications

(30 citation statements)

References 23 publications

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“…When it reached the optimum time, there was the condition of adsorption equilibrium when all active sites have been occupied by metal cations. Similar trends were also reported for the adsorption of Pb(II) onto other adsorbents such as silica-gel supported hyperbranched polyamidoamine dendrimers 30 , chitosan-polyacrylonitrile blend 31 , C-methylcalix [4]resorcinarene 24 .…”

Section: Effect Of Adsorption Timesupporting

confidence: 84%

Synthesis of C–4–Allyloxy–3 Methoxyphenylcalix[4] resorcinarene from Vanillin and Its Application as Adsorbent of Pb(II) Metal Cation

Kesuma¹,

Jumina²,

Ohto³

et al. 2016

Orient. J. Chem

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C-4-allyloxy-3-methoxyphenylcalix[4]resorcinarene had been synthesized from vanillin and its application as adsorbent for Pb(II) metal ion had been carried out. The synthesis was conducted in three steps to obtain the product as pink solid in 78.17% yield. The structure elucidation of the product was performed by IR, 1 H-NMR and 13 C-NMR. Adsorption experiments were carried out in a batch system under variation of medium acidity, interaction time and initial metal concentration. Adsorption kinetics was studied using Lagergren and Ho model, while adsorption isotherm was analyzed by Langmuir and Freundlich equations. The result showed that the Pb(II) adsorption was optimum at pH 4 and at interaction time of 30 minutes. The kinetic study showed that the adsorption of Pb(II) followed pseudo-second order of Ho model with adsorption rate (k) of 1.176 g mg -1 minute -1 . The adsorption followed the Langmuir isotherm model with equilibrium constant (K) was 7.28×10 -5 L mol -1 , adsorption capacity (q m ) was 1.538 mmol g -1 (318.67 mg/g) and adsorption energy was 33.67 kJ mol -1 .

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Section: Effect Of Adsorption Timesupporting

confidence: 84%

Synthesis of C–4–Allyloxy–3 Methoxyphenylcalix[4] resorcinarene from Vanillin and Its Application as Adsorbent of Pb(II) Metal Cation

Kesuma¹,

Jumina²,

Ohto³

et al. 2016

Orient. J. Chem

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“…The rate controlling of the second section was IPD. The linear lines of the second section as shown in Figure 4(a)-(c) did not intersect the origin due to the difference in the initial and final mass transfer rate of adsorption [23][24][25]. This implied that the rate of adsorption might be controlled by both IPD and film diffusion [24,[26][27].…”

Section: Adsorption Mechanismmentioning

confidence: 95%

“…As shown in Figure 4, outer surface adsorption occurred in the first sharper section [23][24][25]. The second step described the gradual adsorption for the removal of colour, TSS and COD.…”

Section: Adsorption Mechanismmentioning

confidence: 95%

Adsorption of colour, TSS and COD from palm oil mill effluent (POME) using acid-washed coconut shell activated carbon: Kinetic and mechanism studies

2016

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Abstract. The disposal of palm oil mill effluent (POME) without proper treatment before being discharged into natural water sources has become undesirable because of high concentration of suspended solid (SS), oil and grease (O&G), chemical oxygen demand (COD) and biological oxygen demand (BOD). This study investigated the feasibility of removing colour, total suspended solid (TSS) and COD using acid-washed coconut shell based activated carbon (CSAC) through the evaluation of the adsorption uptake as well as the adsorption kinetics and mechanism. The percentage removal of colour, TSS and COD from POME onto CSAC were 61%, 39%, 66%, respectively achieved within 48 hours of contact time. The kinetic models studied were pseudo-first-order (PFO), pseudo-secondorder (PSO), and Elovich models. The intra-particle diffusion (IPD) model was studied to interpret the adsorption diffusion mechanism. The adsorption of colour, TSS and COD onto CSAC were best interpreted by the PSO model, and well fitted by the Elovich model. The IPD and Boyd plots indicated that IPD and film diffusion controlled the adsorption of colour, TSS and COD onto the CSAC.

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“…Physical or chemical modification of chitosan using different materials has been studied to improve its properties and adsorption capacity. Chitosan composites such as chitosan/zeolite 25 , chitosan/ lignin 26 , chitosan/MgO 27 , nano-hydroxyapatite/chitosan 28 , and chitosan/polyacrylonitrile 29 have been developed to exhibit better adsorption together with enhancement in other physical and chemical properties.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Silver (I) From Aqueous Solution Using Chitosan/Montmorillonite Composite Beads

Jintakosol

Nitayaphat

2016

Mat. Res.

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Chitosan/montmorillonite (CTS-MMT) composite beads were used as adsorbents for the removal of silver ion (Ag + ) from aqueous solution. Equilibrium adsorption was achieved within 150 min at 3% MMT of chitosan solution. The optimum pH value for Ag + removal was found to be 6-7. The maximum adsorbent dosage for Ag + removal was 5 g/L. Under above maximum conditions the Ag + removal was 95.7%. The maximum adsorption capacities of CTS and CTS-MMT composite beads as obtained from Langmuir isotherm were found to be 38.46 and 43.48 mg/g, respectively. The adsorption kinetic agrees well with the pseudo second order model. The Ag + desorption of CTS-MMT composite bead was 17.39% at pH=4. SEM/EDX images confirm that after adsorption the Ag + were dispersed onto the composite bead surface. The adsorption and desorption experiment demonstrated that the CTS-MMT composite beads can be used as an effective adsorbents for removal of Ag + from aqueous solution.

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Adsorptive removal of Pb(II) ions from polluted water by newly synthesized chitosan–polyacrylonitrile blend: Equilibrium, kinetic, mechanism and thermodynamic approach

Cited by 82 publications

References 23 publications

Synthesis of C–4–Allyloxy–3 Methoxyphenylcalix[4] resorcinarene from Vanillin and Its Application as Adsorbent of Pb(II) Metal Cation

Synthesis of C–4–Allyloxy–3 Methoxyphenylcalix[4] resorcinarene from Vanillin and Its Application as Adsorbent of Pb(II) Metal Cation

Adsorption of colour, TSS and COD from palm oil mill effluent (POME) using acid-washed coconut shell activated carbon: Kinetic and mechanism studies

Adsorption of Silver (I) From Aqueous Solution Using Chitosan/Montmorillonite Composite Beads

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