Boron removal from aqueous solutions using alginate gel beads in fixed‐bed systems

Demey, Hary; Ruiz, Magda; Barron-Zambrano, Jesus; Sastre, Ana Marı́a

doi:10.1002/jctb.4361

Cited by 32 publications

(14 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, due to greater availability of drug particles on the membrane surface at higher concentration, there was better uptake of drug solutes per unit mass of absorbent. Similar trend results have been reported for fixed‐bed adsorption of pollutants …”

Section: Resultssupporting

confidence: 90%

See 1 more Smart Citation

Sericin‐coated polymeric microfiltration membrane for removal of drug‐based micropollutants

Verma

Subbiah

2019

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

BACKGROUND: Drug-based micropollutants present in water sources are proven to be persistent, bioactive and toxic even at low concentration for human consumption. Therefore, the complete removal of the drugs from water is crucial to avoid long-term medical complications. In the present study, a novel sericin-coated adsorptive microfiltration (MF) membrane is used for the removal of drug-based micropollutants. RESULTS:The sericin-coated membrane was tested for removal of different classes of drugs from water. The membrane completely removed NSAIDs and antibiotics from water at 20 g L −1 concentration. The adsorption mechanism was profoundly influenced by charge-based interaction and hydrogen bonding, hence charged anionic drugs were more effectively removed than uncharged drugs. In multidrug mixtures, the removal efficiency was observed in the following sequence; ibuprofen > diclofenac > amoxicillin > ciprofloxacin > estrone > -estradiol. Desorption of the drugs from the membrane surface can be effectively controlled by altering the pH of the membrane-cleaning solution. Presence of other inorganic salts in the aqueous drug solution did not interfere with the removal efficiency of the sericin-coated membrane. The performance of sericin-coated membrane was studied using continuous adsorptive membrane filtration approach. The dynamic adsorption behavior of a fixed-bed membrane column was predicted using Bohart-Adams model. The model can predict the adsorption breakthrough curve with minimum experimental error.CONCLUSIONS: This study reveals the unique application of sericin-coated MF membrane for effective removal of drug-based micropollutants from water, and demonstrates its easy regeneration and effectiveness for multiple cycles of filtration.

show abstract

Section: Resultssupporting

confidence: 90%

“…As the flow rate was increased, further removal of ibuprofen decreased significantly at 15 L h −1 and 20 L h −1 , respectively. At higher flow rate there is a decrease in residence time, so the drug particles had a shorter time to interact with the membrane surface, hence leaving the column early and appearing in the permeate …”

Section: Resultsmentioning

confidence: 99%

Sericin‐coated polymeric microfiltration membrane for removal of drug‐based micropollutants

Verma

Subbiah

2019

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

show abstract

“…At low pH values, the carboxylic groups in alginate are mostly in -COOH form and boron exist in a neutral form, causing a very low interaction with the adsorbent (Demey-Cedeño et al, 2014). Also, at the acidic condition, ion exchange takes place between H + ions and…”

Section: Effect Of Phmentioning

confidence: 99%

Optimization of Boron Removal From Aqueous Solution via Adsorption Using Composite Beads of Mangrove Bark, Alginate and Zeolite

Mohd¹,

Ismail²

2020

JCEIB

View full text Add to dashboard Cite

The presence of boron beyond the allowable limit in water bodies can pose a dangerous risk to all living organisms. In order to increase the adsorption capacities of composite beads of mangrove bark, alginate and zeolite (MAZC) to remove boron from aqueous solution, pretreatment of mangrove bark using sodium hydroxide solutions at a temperature of 60°C was conducted. The surface characterizations of the beads were conducted using Fourier transform infrared spectroscopy (FTIR), Brunauer-Emmett Teller (BET) and scanning electron microscope with energy dispersive X-ray spectroscopy (EDX) before and after boron adsorption. The results showed that the BET surface area of MAZC beads increased due to modification of the mangrove bark during pretreatment process. The effects of pH, temperature, adsorbent dosage and contact time on the boron uptake were then evaluated using batch studies. It was found that the maximum adsorption of boron was 83.3% occurred at pH 5, 24 h contact time, 12 g of adsorbent dosage and at a temperature of 27°C. Thermodynamic studies indicated the spontaneous and exothermic nature of adsorption process. Langmuir isotherm model best described the experimental adsorption data with maximum adsorption capacities of 6.964 mg/g. The kinetic data were best described by the pseudo-second order model (R2 = 0.9998). These results indicate that the pretreatment of mangrove bark can optimize the removal of boron from aqueous solution.

show abstract

“…The use of biopolymers for boron sorption has received little attention over the last decade. Published papers report the possibility of using chitosan modified with N-methyl-D-glucamine [21], cotton cellulose [22], and sugars [23]; the potential abilities of alginates for boron removal and its application as an encapsulating material have been demonstrated as well [24,25,26,27].…”

Section: Introductionmentioning

confidence: 99%

Boron Removal from Aqueous Solutions by Using a Novel Alginate-Based Sorbent: Comparison with Al2O3 Particles

et al. 2019

View full text Add to dashboard Cite

Boron removal was evaluated in the present work by using calcium alginate beads (CA) and a novel composite based on alginate–alumina (CAAl) as sorbents in a batch system. The effects of different parameters such as pH, temperature, contact time, and composition of alginate (at different concentrations of guluronic and mannuronic acids) on boron sorption were investigated. The results confirm that calcium alginate beads (CA) exhibited a better adsorption capacity in a slightly basic medium, and the composite alginate–alumina (CAAl) exhibited improved boron removal at neutral pH. Sorption isotherm studies were performed and the Langmuir isotherm model was found to fit the experimental data. The maximum sorption capacities were 4.5 mmol g−1 and 5.2 mmol g−1, using CA and CAAl, respectively. Thermodynamic parameters such as change in free energy (ΔG0), enthalpy (ΔH0), and entropy (ΔS0) were also determined. The pseudo-first-order and pseudo-second-order rate equations (PFORE and PSORE, respectively) were tested to fit the kinetic data; the experimental results can be better described with PSORE. The regeneration of the loaded sorbents was demonstrated by using dilute HCl solution (distilled water at pH 3) as eluent for metal recovery.

show abstract

Boron removal from aqueous solutions using alginate gel beads in fixed‐bed systems

Cited by 32 publications

References 25 publications

Sericin‐coated polymeric microfiltration membrane for removal of drug‐based micropollutants

Sericin‐coated polymeric microfiltration membrane for removal of drug‐based micropollutants

Optimization of Boron Removal From Aqueous Solution via Adsorption Using Composite Beads of Mangrove Bark, Alginate and Zeolite

Boron Removal from Aqueous Solutions by Using a Novel Alginate-Based Sorbent: Comparison with Al2O3 Particles

Contact Info

Product

Resources

About