Mono-component versus binary isotherm models for Cu(II) and Pb(II) sorption from binary metal solution by the green alga Pithophora oedogonia

2008 ◽  
Vol 99 (17) ◽  
pp. 8280-8287 ◽  
Author(s):  
Dhananjay Kumar ◽  
Alpana Singh ◽  
J.P. Gaur
Keyword(s):  
Green Alga ◽  
Isotherm Models ◽  
Metal Solution ◽  
Binary Metal

Adsorption of copper and lead in single and binary metal system onto Fumaria indica biomass

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Metal Ion ◽  
Metal Removal ◽  
Aqueous Media ◽  
Freundlich Isotherm ◽  
Isotherm Models ◽  
Metal System ◽  
Lead Adsorption ◽  
Binary Metal ◽  
Binary Metal System ◽  
Adsorption Data

Among heavy metals, lead and copper pose a significant threat to the due to their toxicity, incremental accumulation in the food chain and persistence in the ecosystem. Lead and copper are introduced into water from various industries and other human activities. Present study was aimed to remove lead and copper from aqueous media using Fumaria indica biomass as a function of metal ions initial concentration. Both metal removal was investigated in single and binary system. For comparison isotherm models i.e., Langmuir and Freundlich were applied on experimental adsorption data. Results showed that the copper behavior was different in single and binary metal system, whereas lead adsorption remained the same in both single and binary metal systems. The Freundlich isotherm model fitted well to the adsorption data of both single and binary metal system. The thermodynamic parameters i.e., ΔG0, was measured to get insight into adsorption phenomenon and negative value of ΔG0 suggest that the adsorption process was spontaneous in nature. Results showed that in multi-metal system the adsorption of specific metal ion may change and during metal adsorption from industrial wastewater this effect must be taken in account before generalization of results.

Saponification of Adsorbent BLPAMA

2013 ◽  
Vol 721 ◽  
pp. 20-23 ◽  
Author(s):  
Qing Xin Yao ◽  
Jian Jun Xie ◽  
Jun Xia Liu
Keyword(s):  
Maleic Anhydride ◽  
Solution Polymerization ◽  
Optimum Conditions ◽  
Sodium Lignosulfonate ◽  
Metal Solution ◽  
Binary Metal ◽  
Adsorption Quantity

The saponification conditions for bentonite/sodium lignosulfonate graft acrylamide and maleic anhydride adsorbent composites (BLPAMA) prepared by solution polymerization were studied in detail. The results had shown that the optimum conditions of saponification were that the concentration of NaOH (CNaOH) = 1.0mol/L, the temperature (T) = 90°C and the saponification time (t) = 1.5h. And the maximum adsorption quantity of saponified BLPAMA to Pb2+ was 1.304mmol/g in the Pb2+/Cu2+ binary metal solution.

Removal of nickel and zinc from single and binary metal solutions by Sargassum angustifolium

2013 ◽  
Vol 68 (6) ◽  
pp. 1384-1390 ◽  
Author(s):  
Salman Ahmady-Asbchin ◽  
Naser Jafari
Keyword(s):  
Binary Solution ◽  
Inhibitory Effect ◽  
Multilayer Adsorption ◽  
Natural Form ◽  
Primary Metal ◽  
Sorption Data ◽  
Freundlich Model ◽  
Metal Solution ◽  
Binary Metal ◽  
Sargassum Angustifolium

The capability of Sargassum angustifolium in removing nickel (Ni) (II) and zinc (Zn) (II) from single and binary metal solution was determined. In binary solution the presence of the secondary metal inhibited the sorption of the primary metal by S. angustifolium but the inhibitory effect of Ni during sorption of Zn is stronger than the inhibitory effect of Zn in absorption of Ni. The total metal (Ni + Zn) sorbed from the binary metal solution by S. angustifolium cells always remained lower than the total sorption of individual metals from their respective single metal solutions, thereby suggesting competition between Ni(II) and Zn(II) for the common binding sites on S. angustifolium. The maximum uptake capacities of the S. angustifolium, which was collected near Bushehr, Persian Gulf, Iran in the natural form, at the optimal conditions for Ni(II) and Zn(II) ions in single metal solutions were approximately 0.71 and 0.93 mmol/g dry S. angustifolium, respectively. Under the binary system Ni(II) and Zn(II) uptake capacities were 0.41 mmol Ni/g and 0.36 mmol Zn/g, respectively. Better fitness of equilibrium metal sorption data to the Langmuir than the Freundlich model suggests multilayer adsorption of test metals onto the cell surface.

scholarly journals Single and Binary Equilibrium Studies for Ni2+ and Zn2+ Biosorption onto Lemna gibba from Aqueous Solutions

Processes ◽  
2020 ◽  
Vol 8 (9) ◽  
pp. 1089
Author(s):  
Liliana Morales-Barrera ◽  
César Mateo Flores-Ortiz ◽  
Eliseo Cristiani-Urbina
Keyword(s):  
Optimal Solution ◽  
Freundlich Isotherm ◽  
Lemna Gibba ◽  
Isotherm Models ◽  
Solution Ph ◽  
Equilibrium Studies ◽  
Metal Concentrations ◽  
Binary Metal ◽  
Batch Systems ◽  
Equilibrium Data

The biosorption ability of Lemna gibba for removing Ni2+ and Zn2+ ions in aqueous batch systems, both individually and simultaneously, was examined. The influences of solution pH and initial single and binary metal concentrations on equilibrium Ni2+ and Zn2+ biosorption was explored. The optimal solution pH for Ni2+ and Zn2+ biosorption was 6.0, for both the single and binary metal systems. Ni2+ and Zn2+ biosorption capacities increased with increasing initial metal concentrations. The presence of Zn2+ ions more adversely affected the biosorption of Ni2+ ions in the binary metal systems than vice versa. The single and binary biosorption isotherms of Ni2+ and Zn2+ revealed that L. gibba’s affinity for Zn2+ ions was higher than that for Ni2+ ions. The Redlich–Peterson and Freundlich isotherm models fit well to the experimental equilibrium data of Ni2+ ions, whereas Redlich–Peterson and Langmuir models better described the equilibrium data of Zn2+ ions in single metal systems. The modified Sips isotherm model best fit the competitive biosorption data of Ni2+-Zn2+ on L. gibba. FTIR analyses suggest the involvement of hemicellulose and cellulose in the biosorption of Ni2+ and Zn2+. The presence of Ni2+ and Zn2+ on the L.gibba surface was validated by SEM-EDX.

Removal of Binary Metal (Nickel and Lead) Ions from Aqueous Solution Using Natural and Modified Clinoptilolite

2014 ◽  
Vol 661 ◽  
pp. 45-50
Author(s):  
Said Zuliyana ◽  
Alrozi Rasyidah ◽  
Senusi Faraziehan ◽  
Mohamad Anuar Kamaruddin
Keyword(s):  
Aqueous Solution ◽  
Solution Concentration ◽  
Lead Ions ◽  
Adsorbent Dosage ◽  
Adsorption Studies ◽  
Metal Solution ◽  
Binary Metal ◽  
Optimum Dosage ◽  
Percentage Removal ◽  
Modified Clinoptilolite

In this study, adsorption of binary metal (Ni(II) and Pb(II)) ions from aqueous solution by using natural (NC), acid-modified (AC) and base-modified (BC) clinoptilolite were investigated to determine the effects of adsorbent dosage, metal solution’s pH and initial metal solution concentration. From the adsorption studies, the optimum dosage of adsorbent was found to be 2.0g for all adsorbents (NC, AC and BC) specifically for removal of Pb(II). In contrast, optimum dosage of for removal of Ni(II) was found to be 2.0g for NC and 4.0g for both AC and BC, respectively. The average pH for Ni(II) and Pb(II) ion solutions were 6. It was further observed that, the percentage removal of Ni(II) was largely influenced by the presence of lead due to the preference of Pb2+ ions by the natural and modified clinoptilolites.

scholarly journals Kinetics and Equilibrium Studies for the Removal of Mn and Fe from Binary Metal Solution Systems Using a Romanian Thermally Activated Natural Zeolite

Water ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1614
Author(s):  
Emilia Neag ◽  
Anamaria Iulia Török ◽  
Claudiu Tanaselia ◽  
Ioan Aschilean ◽  
Marin Senila
Keyword(s):  
Natural Zeolite ◽  
Batch Adsorption ◽  
Sorption Behavior ◽  
Equilibrium Studies ◽  
Activation Temperature ◽  
Metal Solution ◽  
Thermally Activated ◽  
Binary Metal ◽  
Lack Of Information ◽  
Fe And Mn

In the present study, the sorption behavior of iron (Fe) and manganese (Mn) from a binary metal solution system onto thermally activated natural zeolite was studied. Batch adsorption experiments were carried out to investigate the effects of zeolite quantity, particle size, and activation temperature. Equilibrium studies were carried out to evaluate the adsorption capacity of the thermally activated natural zeolite. The obtained results showed that the thermally activated natural zeolite favored the removal of Fe over Mn, due to competition between them. Elemental analysis of the activated zeolite samples obtained by energy-dispersive X-ray analysis (EDX) indicated a Si/Al ratio >4, which is specific for clinoptilolite-type zeolite. The removal of Fe and Mn was best described by the Langmuir model, indicating the formation of a monolayer on the surface of the activated natural zeolite. The kinetic results revealed that the experimental data were best fitted by the pseudo-second-order model for both metals. The results suggest that a new natural zeolite from Rupea quarry, Brașov County, Romania could be used as a potential adsorbent for removal of Fe and Mn from binary metal solution systems, addressing the lack of information about this material from this region.

Development of melamine-impregnated alginate capsule for selective recovery of Pd(II) from a binary metal solution

2021 ◽  
Vol 288 ◽  
pp. 125648
Author(s):  
Wei Wei ◽  
Yanzi Qiu ◽  
Yufeng Zhao ◽  
Kai Zhang ◽  
Yajun Ji ◽  
...  
Keyword(s):  
Selective Recovery ◽  
Metal Solution ◽  
Binary Metal

Effect of Iron Limitation on the Ultrastructure of Agmenellum Quadruplicatum

1981 ◽  
Vol 39 ◽  
pp. 410-411
Author(s):  
L. P. Hardie ◽  
D. L. Balkwill ◽  
S. E. Stevens
Keyword(s):  
Growth Medium ◽  
Green Alga ◽  
Natural Habitat ◽  
Iron Limitation ◽  
Natural Environments ◽  
Blue Green Alga ◽  
Marine Cyanobacterium ◽  
Natural Systems ◽  
Thin Sectioning ◽  
Agmenellum Quadruplicatum

Agmenellum quadruplicatum is a unicellular, non-nitrogen-fixing, marine cyanobacterium (blue-green alga). The ultrastructure of this organism, when grown in the laboratory with all necessary nutrients, has been characterized thoroughly. In contrast, little is known of its ultrastructure in the specific nutrient-limiting conditions typical of its natural habitat. Iron is one of the nutrients likely to limit this organism in such natural environments. It is also of great importance metabolically, being required for both photosynthesis and assimilation of nitrate. The purpose of this study was to assess the effects (if any) of iron limitation on the ultrastructure of A. quadruplicatum. It was part of a broader endeavor to elucidate the ultrastructure of cyanobacteria in natural systemsActively growing cells were placed in a growth medium containing 1% of its usual iron. The cultures were then sampled periodically for 10 days and prepared for thin sectioning TEM to assess the effects of iron limitation.

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