Optimization and equilibrium studies of Pb(II) removal by <i>Grewia Asiatica</i> seed: a factorial design approach

Siyal, Ali N.; Memon, Saima Q.; Khaskheli, Mazhar Iqbal

doi:10.2478/v10026-012-0062-9

Cited by 13 publications

(4 citation statements)

References 27 publications

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“…e estimated value of mean sorption energy (E) was calculated, 7.93 k Jmol −1 from the slope of plot ( ). e magnitude of E indicates the nature of sorption process; > -16 k Jmol −1 (chemisorption) and < k Jmol −1 (physisorption) [25]. On the basis of this observation it can be anticipated that sorption of phenol on PSH surface predominantly followed physisorption.…”

Section: Isotherm Studiesmentioning

confidence: 90%

Chemical Recycling of Expanded Polystyrene Waste: Synthesis of Novel Functional Polystyrene‐Hydrazone Surface for Phenol Removal

Siyal

Memon

Parveen

et al. 2012

Journal of Chemistry

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Expanded polystyrene (EPS) waste was chemically recycled to a novel functional polystyrene-hydrazone (PSH) surface by acetylation of polystyrene (PS) and then condensation with phenyl hydrazine. The synthesized surface was characterized by the FT-IR and elemental analysis. Synthesized novel functional PSH surface was successfully applied for the treatment of phenol-contaminated industrial wastewater by solid-phase extraction. Multivariant sorption optimization was achieved by factorial design approach. 99.93% of phenol was removed from aqueous solution. FT-IR study showed the involvement of nitrogen of hydrazone moiety of synthesized surface for the uptake of phenol through the hydrogen bonding.

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Section: Isotherm Studiesmentioning

confidence: 90%

Chemical Recycling of Expanded Polystyrene Waste: Synthesis of Novel Functional Polystyrene‐Hydrazone Surface for Phenol Removal

Siyal

Memon

Parveen

et al. 2012

Journal of Chemistry

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“…Adsorption is a very effective waste water treatment technique due to its simplicity and ease of operation. G. asiatica leaves and seeds exhibited excellent adsorption potential in batch-wise adsorption experiments and may be used as effective, low cost and green alternative biosorbent material for lead and congo red dye removal from aqueous solution [71]. In a comparative study G. asiatica leaves exhibited better adsorption potential than Raphanus sativus peels for removing congo red dye from water and its efficiency of adsorption is comparable with charcoal [72].…”

Section: Adsorption Studiesmentioning

confidence: 99%

Grewia asiatica L., a Food Plant with Multiple Uses

et al. 2013

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Grewia asiatica L., is a species native to south Asia from Pakistan, east to Cambodia, cultivated primarily for its edible fruit and well-reputed for its diverse medicinal uses. Fruits are a rich source of nutrients such as proteins, amino acids, vitamins, and minerals and contain various bioactive compounds, like anthocyanins, tannins, phenolics and flavonoids. Different parts of this plant possess different pharmacological properties. Leaves have antimicrobial, anticancer, antiplatelet and antiemetic activities; fruit possess anticancer, antioxidant, radioprotective and antihyperglycemic properties; while stem bark possesses analgesic and anti-inflammatory activities. This review focuses on the botanical description, phytochemistry, nutritional studies and pharmacological properties of this plant.

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“…The design consisted of thirty runs, each run was performed twice to fi nd the mean values for the CCD analysis under the response surface methodology. The design of the experiments was statistically analyzed by using Stat Graphics plus for Windows 5.1 (Stat-Point Technologies Inc. 2009) 15 .…”

Section: Experimental Designmentioning

confidence: 99%

Novel Calix[4]arene network resin for Cr(VI) ions Remediation: A Response Surface Approach

Siyal

Memon

2012

Polish Journal of Chemical Technology

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Novel Calix [4]arene Netwok (NCN) resin has been synthesized using Amberlite XAD-2 as the starting material. Hydroxyl groups have been introduced onto the para position of alkylated phenyl ring of Amberlite XAD-2 followed by the condensation to NCN by reacting it with formaldehyde. The NCN resin has been used for the remediation of Cr(VI) contaminated water using factorial design approach. A face-centered Draper-Lin composite design predicted ~100% removal effi ciency at optimum variables (the initial concentration of Cr(VI) ion 10 mg/l sorbent dose 200 mg, agitation time 136 min and pH 2). The accuracy and the fi tting of the model were evaluated by ANOVA and R 2 (0.9992) values. The 99.5% removal effi ciency has been achieved experimentally at the optimum values of the variables. The Langmuir and D-R isotherm models were applicable to the sorption data with the value of R L and the sorption free energy 0.0057-0.1 and 7.93 kJ/mol respectively, suggesting favorable and physical/ion-exchange nature of the sorption. The calculated sorption capacity was 176.1±2.4 mg/g. The recycling studies of NCN resin showed that the multiple use of resin is feasible. Effect of concomitants has also been studies and proposed method was applied successfully for removal (98.7%) of Cr (VI) from electroplating wastewater.

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Optimization and equilibrium studies of Pb(II) removal by Grewia Asiatica seed: a factorial design approach

Cited by 13 publications

References 27 publications

Chemical Recycling of Expanded Polystyrene Waste: Synthesis of Novel Functional Polystyrene‐Hydrazone Surface for Phenol Removal

Chemical Recycling of Expanded Polystyrene Waste: Synthesis of Novel Functional Polystyrene‐Hydrazone Surface for Phenol Removal

Grewia asiatica L., a Food Plant with Multiple Uses

Novel Calix[4]arene network resin for Cr(VI) ions Remediation: A Response Surface Approach

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