Treating High Nitrate Groundwater Using Surfactant Modified Zeolite in Fixed Bed Column

Masukume, Mike; Eskandarpour, Akbar; Ochieng, Aoyi; Otieno, Fred

doi:10.1080/01496395.2010.551246

Cited by 22 publications

(7 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Aluminosilicate zeolites with negatively charged surfaces have been widely used in this approach after a surface modification with a cationic surfactant in order to obtain an anionic exchanger system.The hexadecyltrimethyl ammonium (HDTMA + ) [20] is mainly used as cationic surfactant because of its large size that prevents it to be adsorbed in the zeolite pore and its high thermal and chemical stability. The resulting surfactant-modified zeolite SMZ is suitable to remove pollutant anions from contaminated water [21][22][23][24][25]. Zhan et al have studied the effect of the concentration of a cationic surfactant, the hexadecylpyridinium HDP + , in the formation of the SMZ system.…”

Section: Introductionmentioning

confidence: 99%

Surfactant-modified MFI-type nanozeolites: Super-adsorbents for nitrate removal from contaminated water

Hanache

Sundermann

Lebeau

et al. 2019

Microporous and Mesoporous Materials

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Surfactant-modified MFI-type nanozeolites: Super-adsorbents for nitrate removal from contaminated water

Hanache

Sundermann

Lebeau

et al. 2019

Microporous and Mesoporous Materials

View full text Add to dashboard Cite

“…In the presence of the cationic surfactant, the adsorption of head group CTA + on the AC surface, introduced additional positive adsorption sites. Consequently, electrostatic interaction between nitrate ions and CTA + was created and then, the adsorption of nitrate was enhanced . To investigate the kinetics of nitrate adsorption onto the activated carbon impregnated with CTABr solution, three models were considered, that is, pseudo‐first order, pseudo‐second order, and intra‐particle diffusion using the following equations, respectively:

\frac{{italicdq}_{t}}{dt} = k_{1} ((), q_{e} - q_{t})

\frac{{italicdq}_{t}}{dt} = k_{2} {(q_{e} - q_{t})}^{2}

q_{t} = k_{3} t^{0, 5}

…”

Section: Resultsmentioning

confidence: 99%

Performance of surfactant‐modified activated carbon prepared from dates wastes for nitrate removal from aqueous solutions

Allalou

Miroud

Belmedani

et al. 2018

Env Prog and Sustain Energy

View full text Add to dashboard Cite

New material (AC‐CTABr) was successfully prepared from chemical activation of dates wastes (AC), followed by cationic surfactant modification and was used to enhance nitrate removal from aqueous solutions. Brunauer, Emmett and Teller (BET) analysis revealed good binding of quaternary ammonium groups on the surface (1407 m2/g for the AC and 569 m2/g for the AC‐CTABr). Batch experiments were conducted to examine the effect of contact time, solution pH, adsorbent dose, and initial concentration of nitrate. Preliminary results showed an improvement of nitrate removal from 14% to 60% for the AC and the AC‐CTABr, respectively. Also, the adsorption kinetic was very fast; the equilibrium was achieved within the first 5 min of contact time between the adsorbents and the nitrate solution. Application of several isotherm models has shown that Langmuir and Freundlich models described well the experimental data with a maximum adsorption capacity of 83.33 mg/g. Three simplified kinetic models were tested to investigate the adsorption mechanism. The pseudo‐second order model was found to describe adequately the experimental kinetic data. Results showed that the new adsorbent material is a suitable adsorbent for nitrate removal. © 2018 American Institute of Chemical Engineers Environ Prog, 38: S403–S411, 2019

show abstract

“…The kinetic studies are fundamental in the design of an absorber as they provide essential information such as the adsorption rate, residence time and mass transfer parameters. In addition, kinetic studies help to evaluate the suitability of any material as a potential adsorbent in removing pollutants from wastewater [22] To investigate the adsorption kinetics of Fe (II) and Mn (II) on clay, the two most common kinetic models in water treatment i.e. pseudo1 st order and pseudo-2 nd order models were fitted to the experimental data.…”

Section: Kinetic Modelsmentioning

confidence: 99%

Synthetic and Modified Clay for Heavy Metal Removal in Acid Mine Drainage

2020

SETWM-20, ACBES-20 &Amp; EEHSS-20 Nov. 16-17, 2020 Johannesburg (SA)

View full text Add to dashboard Cite

The treatment of acid mine drainage using clays has been widely investigated and has produced the most promising results in unravelling the issue of heavy metals present in AMD that are responsible for endangering the environment and human beings. However, clays in its pure form fails to perform well in AMD with high concentrations of metals. The modification of already available clays and the production of the cheap synthetic form may be an alternative solution into achieving clean water within the government legislated maximum concentrations for human consumption. Nano-clays were used as adsorbents to evaluate their ability to remove heavy metals from acid mine drainage with a specific focus on manganese and iron. The two nano-clay adsorbents used in this study are modified bentonite (MB) and hydrotalcite (HT) clays. Batch adsorption experiments were carried out to determine the adsorption capacity of both clays. The Langmuir isotherm gave the best fit with adsorption capacity of 2.98 and 243.9 mg/g in MB, and 5.44 and 227.27 mg/g in HT, for Mn (II) and Fe (II) ions, respectively. The pseudo-first order and pseudo-second order kinetic models were applied to the data. The best fit was achieved with the pseudo-second order model

show abstract

Treating High Nitrate Groundwater Using Surfactant Modified Zeolite in Fixed Bed Column

Cited by 22 publications

References 31 publications

Surfactant-modified MFI-type nanozeolites: Super-adsorbents for nitrate removal from contaminated water

Surfactant-modified MFI-type nanozeolites: Super-adsorbents for nitrate removal from contaminated water

Performance of surfactant‐modified activated carbon prepared from dates wastes for nitrate removal from aqueous solutions

Synthetic and Modified Clay for Heavy Metal Removal in Acid Mine Drainage

Contact Info

Product

Resources

About