Removal of trace amounts of strontium from aqueous solutions by ion flotation. I. Batch experiments

1966 ◽  
Vol 16 (10) ◽  
pp. 293-297 ◽  
Author(s):  
B. M. Davis ◽  
F. Sebba
Keyword(s):  
Aqueous Solutions ◽  
Batch Experiments ◽  
Ion Flotation

Removal of chromium (VI) from aqueous solutions using Diospyros discolor seed activated with nitric acid: isotherm and kinetic studies

2019 ◽  
Vol 79 (6) ◽  
pp. 1214-1221 ◽  
Author(s):  
Dian Arrisujaya ◽  
Nina Ariesta ◽  
Mamay Maslahat
Keyword(s):  
Nitric Acid ◽  
Aqueous Solutions ◽  
Kinetic Studies ◽  
Adsorption Efficiency ◽  
Batch Experiments ◽  
Adsorption Models ◽  
Chromium Vi ◽  
Optimum Ph ◽  
Scanning Electron ◽  
Analyze Data

Diospyros discolor seed activated with nitric acid was investigated for removing Cr(VI) from aqueous solutions. Batch experiments were used to determine the adsorption efficiency, effect of pH, adsorption isotherm, and kinetics. Langmuir and Freundlich adsorption models were used to analyze data of Cr(VI) uptake. Fourier transform infrared spectroscopy was used to investigate the functional groups and surface morphology was checked using a scanning electron microscope, coupled with energy dispersive spectroscopy. The optimum pH in Cr(VI) uptake was 3.5 and the maximum adsorption efficiency reached 100% at 60 min.

Experimental design and batch experiments for optimization of Cr(VI) removal from aqueous solutions by hydrous cerium oxide nanoparticles

2014 ◽  
Vol 92 (7) ◽  
pp. 1354-1362 ◽  
Author(s):  
Ahmad B. Albadarin ◽  
Zheyu Yang ◽  
Chirangano Mangwandi ◽  
Yoann Glocheux ◽  
Gavin Walker ◽  
...  
Keyword(s):  
Experimental Design ◽  
Aqueous Solutions ◽  
Cerium Oxide ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Batch Experiments

scholarly journals Removal of Cr(VI) from Aqueous Environments Using Micelle-Clay Adsorption

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Mohannad Qurie ◽  
Mustafa Khamis ◽  
Adnan Manassra ◽  
Ibrahim Ayyad ◽  
Shlomo Nir ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Removal Efficiency ◽  
Continuous Flow ◽  
Contact Time ◽  
Langmuir Adsorption Isotherm ◽  
Optimal Conditions ◽  
Batch Experiments ◽  
Langmuir Adsorption ◽  
Ph Values ◽  
Aqueous Environments

Removal of Cr(VI) from aqueous solutions under different conditions was investigated using either clay (montmorillonite) or micelle-clay complex, the last obtained by adsorbing critical micelle concentration of octadecyltrimethylammonium ions onto montmorillonite. Batch experiments showed the effects of contact time, adsorbent dosage, and pH on the removal efficiency of Cr(VI) from aqueous solutions. Langmuir adsorption isotherm fitted the experimental data giving significant results. Filtration experiments using columns filled with micelle-clay complex mixed with sand were performed to assess Cr(VI) removal efficiency under continuous flow at different pH values. The micelle-clay complex used in this study was capable of removing Cr(VI) from aqueous solutions without any prior acidification of the sample. Results demonstrated that the removal effectiveness reached nearly 100% when using optimal conditions for both batch and continuous flow techniques.

Investigation of Co(II) sorption on GMZ bentonite from aqueous solutions by batch experiments

2011 ◽  
Vol 289 (2) ◽  
pp. 511-520 ◽  
Author(s):  
Liang Chen ◽  
Shaoming Yu ◽  
Liming Zuo ◽  
Bin Liu ◽  
Lingli Huang
Keyword(s):  
Aqueous Solutions ◽  
Gmz Bentonite ◽  
Batch Experiments

Simultaneous copper, cobalt and phenol removal from aqueous solutions by alternating biosorption and biodegradation

2011 ◽  
Vol 63 (10) ◽  
pp. 2388-2394 ◽  
Author(s):  
K. Tsekova ◽  
S. Ganeva ◽  
A. Hristov ◽  
D. Todorova ◽  
V. Beschkov
Keyword(s):  
Aqueous Solutions ◽  
Poly Vinyl Alcohol ◽  
Phenol Removal ◽  
Batch Experiments ◽  
Phenol Biodegradation ◽  
Candida Sp ◽  
Cobalt Removal ◽  
Removal Of Heavy Metals ◽  
Removal Efficiencies ◽  
Positively Charged

A strategy for removal of heavy metals and phenol from wastewaters is proposed. It involves consecutive cation biosorption by fungi, phenol biodegradation by the yeast association Candida sp. 2326 + Candida sp. 2327 and regeneration. Copper and cobalt removal from aqueous solutions containing 80–120 mg/L phenol by biosorption, using Rhizopus archizus cells immobilized onto poly(vinyl alcohol), was investigated by conducting a series of batch experiments. The removal efficiencies were 81% for Cu and 5% for Co. The residual concentrations of Cu (1.9 mg/L) and of Co (9.5 mg/L) did not change the biodegradation dynamics of phenol. A quantitative biodegradation of 120 mg/L phenol proceeded within 22 h. After biodegradation of phenol, the removal efficiencies achieved by biosorption after regeneration were 90% for Cu and 44% for Co. It was found that copper and cobalt form positively charged complexes with phenol. This complex formation hinders the retention of Cu and Co by the biosorbent and reduces the uptake of their cations.

Removal of Xylenol Orange from Solutions by γ-Cyclodextrin-Grafted Carboxymethyl Cellulose

2011 ◽  
Vol 204-210 ◽  
pp. 1180-1183 ◽  
Author(s):  
Xiao Li Xiong ◽  
Chen Bin Shao
Keyword(s):  
Free Energy ◽  
Aqueous Solutions ◽  
Carboxymethyl Cellulose ◽  
Contact Time ◽  
Xylenol Orange ◽  
Free Energy Change ◽  
Energy Change ◽  
Batch Experiments ◽  
Adsorption Capacities ◽  
Adsorption Temperature

The potential to remove xylenol orange (XO) from aqueous solutions through adsorption on γ-cyclodextrin-grafted carboxymethyl cellulose (CCMC) was investigated in batch experiments. The effects of contact time, adsorption temperature and initial XO concentration were discussed. Results of batch experiments showed that CCMC exhibited some sorption capacities towards XO. It was found that isotherm fitted Languir and Freundlich models for the adsorption of XO on CCMC. On the basis of the Langmuir analysis, the maximum adsorption capacities were determined to be 29.9, 27.1, 21.9, 16.2 and 16.1 mg of XO per gram of CCMC at 283, 288, 293, 298 and 303K, respectively. The negative values of free energy change indicated the spontaneous nature of adsorption.

scholarly journals Al (III) removal from wastewaters by natural clay and coconut shell

2019 ◽  
Keyword(s):  
Aqueous Solutions ◽  
Contact Time ◽  
Acid Treatment ◽  
Adsorption Process ◽  
Coconut Shell ◽  
Maximum Adsorption Capacity ◽  
Agitation Rate ◽  
Batch Experiments ◽  
Natural Clay ◽  
Initial Ph

<p>This paper describes the adsorption of Al3+ ions from aqueous solutions, by natural clay (from Sakarya's Yenigün district) and coconut shell modified by means of acid treatment. Batch experiments were carried out to determine the effect of various factors such as initial pH (4-9), temperature (20, 40, 70 oC), initial concentration (10 to 200 mg L-1) and contact time (1-120 minute) on the adsorption process. The adsorption experiments were performed at a temperature of 20 ±2 oC), at 200 rpm agitation rate, with an adsorbent level of 1 g L-1, produced 98.95% (at pH 6) and 92.83% (at pH 7) maximum Al3+ removal efficiency for clay and coconut shell based adsorbents respectively. Furthermore, the process was found to be exothermic for clay and endothermic for coconut. XRF and XRD analyses of the clay variety used in adsorption analyses revealed it to be saponite clay, within the larger group of smectite clay minerals. The application of Langmuir revealed maximum adsorption capacity of 149.25 mg g-1 for natural clay adsorbent (NCA), and 120.482 mg g-1 for coconut shell adsorbent (CSA). Moreover, adsorption kinetics were found to be consistent with the second order kinetics (R2 &gt; 0.95). The result shows that, natural clay and coconut shell adsorbents are effective adsorbents to remove Al3+ from aqueous solutions with good adsorption rate (&gt;92.8%).</p>

Sign in / Sign up

Export Citation Format

Share Document