REMOVAL OF LEAD IONS FROM AQUEOUS SOLUTION USING GRANULAR IRON SLAG BYPRODUCT AS PERMEABLE REACTIVE BARRIER

This study was aimed to investigate the possibility of using iron slag by product as reactive materials in the porous reactive barriers technologies to achieve the principles of sustainability. Results reveal that the maximum adsorption capacity of iron slag (=2.309 mg/g) can be calculated by Langmuir model because it is more representative for adsorption data. This means that the chem-sorption is predominant mechanism for sorption of lead ions where the dissolution of calcium oxide by hydrolysis and ion exchange can enhance the removal of lead ions by iron oxide surface sites. In addition, the results of continuous tests conducted for 140 hours certified that the longevities of the barriers is proportional straightforwardly with the bed depth but it changed inversely with initial concentration of metal ions and flowrate. Hydraulic conductivity was recognized to remain approximately constant and this certify that there is no precipitation occurred through the removal process. The COMSOL software was proved its ability in the description of the measured breakthrough curves with high agreement.

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Possibility of using granular iron slag by-product as permeable reactive barrier for remediation of simulated water contaminated with lead ions

10.5004/dwt.2020.24974 ◽

2020 ◽

Vol 178 ◽

pp. 211-219 ◽

Cited By ~ 2

Author(s):

Saif S. Alquzweeni ◽

Ayad A.H. Faisal

Keyword(s):

Permeable Reactive Barrier ◽

Lead Ions ◽

Reactive Barrier ◽

Iron Slag ◽

Granular Iron

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Removal of dissolved benzaldehyde from contaminated water stream using granular iron slag byproduct in the permeable reactive barrier technology

10.5004/dwt.2020.26240 ◽

2020 ◽

Vol 203 ◽

pp. 315-326

Author(s):

Ayad A.H. Faisal ◽

Saif S. Alquzweeni ◽

Mu. Naushad ◽

Asma A. Alothman ◽

Gaurav Sharma

Keyword(s):

Permeable Reactive Barrier ◽

Contaminated Water ◽

Water Stream ◽

Reactive Barrier ◽

Iron Slag ◽

Granular Iron

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Permeable Reactive Barrier of Coated Sand by Iron Oxide for Treatment of Groundwater Contaminated with Cadmium and Copper Ions

Al-Khwarizmi Engineering Journal ◽

10.22153/kej.2020.05.002 ◽

2020 ◽

Vol 16 (2) ◽

pp. 47-55

Author(s):

Mohammed B. Abdul-Kareem ◽

Ayad A.H. Faisal

Keyword(s):

Iron Oxide ◽

Copper Ions ◽

Permeable Reactive Barrier ◽

Nano Particles ◽

Maximum Adsorption Capacity ◽

Sorption Data ◽

Reactive Barrier ◽

Good Ability ◽

Langmuir Isotherm Model ◽

Coated Sand

In this research, coated sand iron-oxide (CSIO) has been used as a permeable reactive barrier (PRB) for removal of cadmium and copper ions from the contaminated groundwater. The prepared material has been manufactured by precipitation of nano-particles based this oxide type on the sand surfaces by impregnation process. Therefore, this technique can be considered the main objective of the present study. The description of sorption data for sorbate-sorbent under consideration by the Langmuir isotherm model was more valuable than the Freundlich model. The maximum adsorption capacity of CSIO reaches 1.9181 and 7.6425 mg/g for cadmium and copper respectively. COMSOL Multiphysics Version release 3.5 has a good ability in the simulation and prediction of the cadmium and copper transport through one-dimensional CSIO-PRB. The outcome of this investigation prove that the manufactured CSIO has significant capability in the delay of contaminants the migration through barrier packed with this material. The root means squared errors between predicted and measured data were not exceeded the 0.121; so, this means that there a good agreement between these data

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Simulate permeable reactive barrier by using a COMSOL model and comparison with the Thomas, Yoon–Nelson and Clark models for CR dye remediation by composite adsorbent (sewage and waterworks sludge)

Water Science & Technology ◽

10.2166/wst.2020.500 ◽

2020 ◽

Vol 82 (12) ◽

pp. 2902-2919

Author(s):

Samara Saad Faraj ◽

Rasha Salah Alkizwini ◽

Maad F. Al Juboury

Keyword(s):

Nitrogen Adsorption ◽

Breakthrough Curves ◽

Permeable Reactive Barrier ◽

Order Kinetic ◽

Solution Ph ◽

Glass Waste ◽

Composite Adsorbent ◽

Reactive Barrier ◽

Batch Tests ◽

Waterworks Sludge

Abstract The remediation of Congo Red (CR) dye by the synthetic sorbent composited from sewage and waterworks sludge was studied in batch and continuous experiments. The continuous experiments studied the composite synthetic after mixing with composite synthetic sorbent filter (CSF) glass waste to increase the hydraulic conductivity of the permeable reactive barrier (PRB). The synthetic composite sorbent was characterised by the nitrogen adsorption–desorption tests, field emission-scanning electron microscopy and X-ray diffraction. For evaluating the batch tests, the variable conditions of initial concentration, solution pH, agitation time and agitation speed were studied. The synthetic sorbent showed a high ability to remove the CR from a contaminated water, with maximum sorbent uptake equal to 9,469.211 mg/g and composite adsorbent-filter CSF equal to 4,415.946 mg/g. Pseudo-second-order kinetic model and Langmuir isotherm model governed the adsorption process. The column tests showed the highest reactivity, with 50:50 weight ratios of the adsorbent to filter glass waste. The experiments were done with different concentrations of CR and different bed heights of CSF as the PRB for 90 days. There was a delay in the breakthrough time when decreasing the contaminant concentrations and when increasing the composite adsorbent-filter CSF bed height. The breakthrough curves were well represented by the COMSOL model.

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Waterworks sludge-filter sand permeable reactive barrier for removal of toxic lead ions from contaminated groundwater

Journal of Water Process Engineering ◽

10.1016/j.jwpe.2019.101112 ◽

2020 ◽

Vol 33 ◽

pp. 101112 ◽

Cited By ~ 55

Author(s):

Ayad A.H. Faisal ◽

Saad F.A. Al-Wakel ◽

Hussein A. Assi ◽

Laith A. Naji ◽

Mu. Naushad

Keyword(s):

Permeable Reactive Barrier ◽

Lead Ions ◽

Contaminated Groundwater ◽

Reactive Barrier ◽

Waterworks Sludge

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Kinetic Studies of Cs+ and Sr2+ Ion Exchange Using Clinoptilolite in Static Columns and an Agitated Tubular Reactor (ATR)

ChemEngineering ◽

10.3390/chemengineering5010009 ◽

2021 ◽

Vol 5 (1) ◽

pp. 9

Author(s):

Muhammad Yusuf Prajitno ◽

Mohamad Taufiqurrakhman ◽

David Harbottle ◽

Timothy N. Hunter

Keyword(s):

Adsorption Capacity ◽

Tubular Reactor ◽

Process Intensification ◽

Kinetic Studies ◽

Breakthrough Curves ◽

Maximum Adsorption Capacity ◽

Batch Studies ◽

Shear Mixing ◽

Natural Clinoptilolite ◽

Kinetics Of

Natural clinoptilolite was studied to assess its performance in removing caesium and strontium ions, using both static columns and an agitated tube reactor (ATR) for process intensification. Kinetic breakthrough curves were fitted using the Thomas and Modified Dose Response (MDR) models. In the static columns, the clinoptilolite adsorption capacity (qe) for 200 ppm ion concentrations was found to be ~171 and 16 mg/g for caesium and strontium, respectively, highlighting the poor material ability to exchange strontium. Reducing the concentration of strontium to 100 ppm, however, led to a higher strontium qe of ~48 mg/g (close to the maximum adsorption capacity). Conversely, halving the column residence time to 15 min decreased the qe for 100 ppm strontium solutions to 13–14 mg/g. All the kinetic breakthrough data correlated well with the maximum adsorption capacities found in previous batch studies, where, in particular, the influence of concentration on the slow uptake kinetics of strontium was evidenced. For the ATR studies, two column lengths were investigated (of 25 and 34 cm) with the clinoptilolite embedded directly into the agitator bar. The 34 cm-length system significantly outperformed the static vertical columns, where the adsorption capacity and breakthrough time were enhanced by ~30%, which was assumed to be due to the heightened kinetics from shear mixing. Critically, the increase in performance was achieved with a relative process flow rate over twice that of the static columns.

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