Removal of Cadmium(II) Ions from Synthetic Aqueous Solutions Using Maize Leaves as an Eco-Friendly Sorbent Material in Batch Mode: A Preliminary Study

2018 ◽  
pp. 197-198
Author(s):  
Houcine Benaïssa ◽  
Mohamed Meziani
Keyword(s):  
Aqueous Solutions ◽  
Batch Mode ◽  
Sorbent Material ◽  
Maize Leaves ◽  
Preliminary Study ◽  
Mode A

REMOVAL OF DUNKEL BLAU DYE FROM AQUEOUS SOLUTIONS BY FUNGAL AND PEAT BIOMASS IN BATCH MODE

2010 ◽  
Vol 9 (1) ◽  
pp. 107-112 ◽  
Author(s):  
Igor Cretescu ◽  
Mariana Diaconu ◽  
Cornel Cojocaru ◽  
Roxana Elena Benchea ◽  
Cornel Pohontu
Keyword(s):  
Aqueous Solutions ◽  
Batch Mode

scholarly journals Adsorption Study of Cu2+ Ions from Aqueous Solutions by Bael Flowers (Aegle marmelos)

2020 ◽  
Vol 11 (4) ◽  
pp. 11891-11904
Keyword(s):  
Aqueous Solutions ◽  
Adsorption Capacity ◽  
Metal Ion ◽  
Low Cost ◽  
Sem Analysis ◽  
Ion Concentration ◽  
Maximum Adsorption Capacity ◽  
Aegle Marmelos ◽  
Batch Mode ◽  
Initial Ph

In the present study, batch mode adsorption was carried out to investigate the adsorption capacity of dried bael flowers (Aegle marmelos) for the adsorptive removal of Cu(II) ions from aqueous solutions by varying agitation time, initial metal concentration, the dose of adsorbent, temperature, and initial pH of the Cu(II) ion solution. The percentage removal of 98.7% was observed at 50 ppm initial metal ion concentration, 0.5 g/100.00 cm3 adsorbent dosage, within the contact time of 120 minutes at 30 ºC in the pH range of 4 – 7. The sorption processes of Cu(II) ions was best described by pseudo-second-order kinetics. Langmuir isotherm had a good fit with the experimental data with 0.97 of correlation coefficient (R2), and the maximum adsorption capacity obtained was 23.14 mg g-1 at 30 ºC. The results obtained from sorption thermodynamic studies suggested that the adsorption process is exothermic and spontaneous. SEM analysis showed tubular voids on the adsorbent. FTIR studies indicated the presence of functional groups like hydroxyl, –C-O, –C=O, and amide groups in the adsorbent, which can probably involve in metal ion adsorption. Therefore, dried bael flowers can be considered an effective low-cost adsorbent for treating Cu(II) ions.

scholarly journals Synthesis and application of sugarcane bagasse cellulose mixed esters. Part I: Removal of Co2+ and Ni2+ from single spiked aqueous solutions in batch mode using sugarcane bagasse cellulose succinate phthalate

2019 ◽  
Vol 533 ◽  
pp. 678-691 ◽  
Author(s):  
Megg Madonyk Cota Elias ◽  
Gabriel Max Dias Ferreira ◽  
Francine Tatiane Rezende de Almeida ◽  
Nathália Cristina Martins Rosa ◽  
Isabela Almeida Silva ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Sugarcane Bagasse ◽  
Batch Mode

Evaluation of Chitosan Modified by Sodium Dodecyl Sulfate for Removing Hexavalent Chromium from Aqueous Solutions

2020 ◽  
pp. 13-22
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Aqueous Solutions ◽  
Hexavalent Chromium ◽  
Sodium Dodecyl ◽  
Second Order ◽  
Order Kinetic ◽  
Batch Mode ◽  
Dodecyl Sulfate ◽  
Pseudo Second Order ◽  
Langmuir And Freundlich Models

Hexavalent chromium (Cr(VI)) has the characteristic of forming anionic species, which are very toxic, very soluble in water and difficult to be removed. In this study, dichromate removal from aqueous solutions by chitosan and chitosan modified by sodium dodecyl sulfate (SDS) was addressed. The effect of various experimental parameters, such as pH (1-9), initial concentration (10-100 mg L-1), adsorbent dose (0.005-0.350 g) and contact time (5-60 min) was investigated. All experiments were conducted in batch mode at room temperature (~21 oC). The obtained equilibrium adsorption isotherms were analyzed using the Langmuir and Freundlich models. Furthermore, the kinetics of dichromate removal was analyzed by pseudo-first order, pseudo-second order and the Elovich models. Optimum conditions for obtaining high removal (~97%) within a relatively short time (60 min) are: 5.0 pH, 0.100 g SDS-chitosan dosage and an initial Cr2O72- concentration of 10 mg L-1. The dichromate adsorption capacity of chitosan is 8.3 mg L-1, while that of SDS-chitosan is 9.7 mg L-1. In addition, the adsorption of dichromate by chitosan and SDS-chitosan is well-fitted by the Langmuir and Freundlich models while the adsorption kinetics is best fitted by the pseudo-second-order kinetic model.

Biodegradation of estrogen conjugates by bacteria isolated from river sediments

2011 ◽  
Vol 64 (8) ◽  
pp. 1750-1758 ◽  
Author(s):  
C. N. Duong ◽  
J. H. Lee ◽  
B. J. Lim ◽  
S. D. Kim
Keyword(s):  
Degradation Rate ◽  
River Sediments ◽  
Coli Strain ◽  
Clear Understanding ◽  
Batch Mode ◽  
E Coli ◽  
Crude Extracts ◽  
And Behavior ◽  
Fate And Behavior ◽  
Mode A

The objective of this study was to investigate the ability of E. coli in river sediments to degrade estrogen conjugates. Biodegradation experiments on glucuronide estrogens (E1-GLU, E2-GLU and E3-GLU) using E. coli, non-E. coli bacteria as well as sediment crude extracts were carried out in batch mode. A pure identified E. coli strain (KCTC 2571) was used for comparison of enzyme activity. The results showed that the degradation rate of estrogen conjugates by KCTC 2571 and E. coli isolated from sediments followed a similar trend. Fecal bacteria showed a high ability to deconjugate glucuronided estrogens. Approximately 50% of glucuronide moieties were cleaved within 4 h of contact time in experiments using pure E. coli. The degradation rate was slower in experiments using crude extracts of sediments, and conjugated estrogens were not completely degraded even after 12 h of reaction. These results provide a clear understanding of the fate and behavior of estrogen by bacteria in the environment.

scholarly journals Hydrogenation of Maltose in Catalytic Membrane Reactor for Maltitol Production

2018 ◽  
Vol 156 ◽  
pp. 08008 ◽  
Author(s):  
I.G.B.N. Makertihartha ◽  
Khoiruddin ◽  
Ahmad N. Hakim ◽  
P.T.P. Aryanti ◽  
I.G. Wenten
Keyword(s):  
Membrane Reactor ◽  
Ceramic Membrane ◽  
Operating Pressure ◽  
Catalytic Membrane ◽  
Catalytic Membrane Reactor ◽  
Batch Mode ◽  
Food Industries ◽  
Reaction Conversion ◽  
Preliminary Study ◽  
Sugar Replacement

Maltitol is one of the low-calorie sweeteners which has a major role in food industries. Due to its characteristics of comparable sweetness level to sucrose, maltitol can be a suitable sugar replacement. In this work, catalytic membrane reactor (CMR) was examined in maltitol production through hydrogenation of maltose. Commercial ceramic membrane impregnated with Kalcat 8030 Nickel was used as the CMR. The reaction was conducted at a batch mode operation, 95 to 110°C of temperature, and 5 to 8 bar of pressure. In the range of working conditions used in this study, up to 47% conversion was achieved. The reaction conversion was significantly affected by temperature and pressure. Results of this preliminary study indicated that CMR can be used for hydrogenation of maltose with good performance under a relatively low operating pressure.

scholarly journals CHARACTERIZATION AND POTENTIAL SUITABILITY OF SIMAROUBA GLAUCA SEED SHELL LIGNOCELLULOSIC BIOMASS AS ADSORBENT OF BASIC DYES FROM AQUEOUS SOLUTIONS

2021 ◽  
Vol 55 (5-6) ◽  
pp. 705-722
Author(s):  
JEYAGOWRI BALAKRISHNAN ◽  
YAMUNA RANGAIYA THIAGARAJAN
Keyword(s):  
Aqueous Solutions ◽  
Cost Effective ◽  
Second Order ◽  
Cationic Dyes ◽  
X Ray Diffraction ◽  
Experimental Conditions ◽  
Batch Mode ◽  
Pseudo Second Order ◽  
Simarouba Glauca ◽  
Shell Powder

The present study investigates the potential of Simarouba glauca seed shell powder as a cost-effective adsorbent for the removal of the cationic dyes Malachite green (MG), Methylene blue (MB) and Rhodamine B (RB) from aqueous solutions. The adsorbent was characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and X-ray diffraction (XRD), as well as by Brunauer–Emmett–Teller (BET) and elemental (CHNS) analyses. Batch mode adsorption studies were carried out varying the experimental conditions, such as initial dye concentration and contact time, adsorbent dose, pH and particle size, in order to assess the adsorbent capacity for the removal of cationic dyes from wastewater. The experimental data were analysed using the Langmuir, Freundlich, Temkin and Dubinin–Radushkevich isotherms. The data fitted well the Langmuir model for the dyes studied. Kinetic data were analysed using the pseudo-first order, pseudo-second order, intraparticle diffusion and Boyd models. The experimental results showed that the pseudo-second order model fitted well.

scholarly journals Removal of cobalt(II), copper(II), and nickel(II) ions from aqueous solutions using phthalate-functionalized sugarcane bagasse: Mono- and multicomponent adsorption in batch mode

2016 ◽  
Vol 79 ◽  
pp. 116-130 ◽  
Author(s):  
Stela Nhandeyara do Carmo Ramos ◽  
Amália Luísa Pedrosa Xavier ◽  
Filipe Simões Teodoro ◽  
Laurent Frédéric Gil ◽  
Leandro Vinícius Alves Gurgel
Keyword(s):  
Aqueous Solutions ◽  
Sugarcane Bagasse ◽  
Multicomponent Adsorption ◽  
Batch Mode

scholarly journals The Chemotactic Effect of Osmosis Upon Leucocytes

1921 ◽  
Vol 19 (3) ◽  
pp. 309-319 ◽  
Author(s):  
Frank Maltaner ◽  
Ella Hoppe
Keyword(s):  
Aqueous Solutions ◽  
Preliminary Study ◽  
Chemotactic Effect

This paper presents the results of a preliminary study of conditions affecting the movement of leucocytes. It demonstrates experimental facts which confirm the assumptions that osmotic force present in aqueous solutions and the permeability of leucocytes for water are the factors responsible for the movement of these cells from place to place.

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