Arsenic remediation from drinking water by synthesized nano-alumina dispersed in chitosan-grafted polyacrylamide

Saha, Suparna; Sarkar, Priyabrata

doi:10.1016/j.jhazmat.2012.05.001

Cited by 131 publications

(53 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The wide band at 3461.41 cm -1 shows the presence of OH and -NH stretching vibrations. The peak at 3189.43 cm -1 shows the presence of -NH stretching band 31 and the peak around 1573.98 cm -1 shows the presence of NH bending in -NH2. The peak present at 1384.95 cm -1 indicates the presence of methyl group.…”

Section: Ftir Analysismentioning

confidence: 99%

Preparation and Characterization of Alumina and Silica Modified Chitosan

2017

RJC

View full text Add to dashboard Cite

In this present work, the modified chitosan composite is prepared by using Alumina and Silica. The prepared composites are characterized by SEM, EDAX, XRD and FTIR techniques. The physiochemical characteristics such as Carbon Yield (%), Moisture content, pH, Acidity and Basicity, Zero point charge, Boehm's titration, Iodine number are also carried out. The yield and iodine number of chitosan modified silica 91.6% and 2743.555mg/g is higher than the chitosan modified alumina 85.2% and 2121.457mg/g. The prepared composites are used as remarkable adsorbents in the treatment of wastewater due to its biodegradable and non-toxic nature.

show abstract

Section: Ftir Analysismentioning

confidence: 99%

Preparation and Characterization of Alumina and Silica Modified Chitosan

2017

RJC

View full text Add to dashboard Cite

show abstract

“…For example, chitosan was cross-linked with EDTA and was studied for the removal of metal ions with efficiency up to 1.56 mmol g −1 [19]. Regeneration of chitosan sorbent in adsorption columns was realized with a solution of sodium hydroxide, hydrochloric acid and sodium chloride [20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Development and treatment procedure of arsenic-contaminated water using a new and green chitosan sorbent: kinetic, isotherm, thermodynamic and dynamic studies

Brion-Roby

Gagnon

Deschênes

et al. 2017

Pure and Applied Chemistry

View full text Add to dashboard Cite

Arsenic is classified as one of the most toxic elements for humans by the World Health Organization (WHO). With the tightening drinking water regulation to 10 μg L −1 by the WHO, it is necessary to find efficient sorbent materials for arsenic. In this work, the removal of arsenic(V) from water is achieved with an insoluble chitosan sorbent in the protonated form obtained by a simple heating process. Kinetic studies show a very fast sorption (less than 10 min). The Langmuir isotherm model is best describing experimental data with a capacity of 42 mg g −1 at pH 8. The sorption process is based on anion exchange (chemisorption) determined from the Dubinin-Radushkevich model. The sorption efficiency of the chitosan sorbent is 97 % at low concentrations (e.g. 100 μg L −1). Thermodynamic analysis reveals that the sorption process is exothermic and is controlled by enthalpic factors. Breakthrough curves (BTC) were acquired in real-time by instrumental chromatography and was better described by the Thomas model. BTC from column sorption and desorption with a salt solution suggest that this sorbent is relevant for large scale applications. With this new renewable product, it will be possible to treat arsenic contaminated water at low cost and with little waste (concentration factor of 1500).

show abstract

“…Porous materials are known for their high-adsorption capacities due to large surface area, narrow pore-size distributions and highly uniform channels (Kim et al 2004). We have earlier reported nano-alumina-loaded chitosan-graft-polyacrylamide for arsenic removal with loading capacity 6.2 mg/g (Saha and Sarkar 2012). However, large-scale removal of arsenic requires higher adsorption capacity, and considering this fact, we have synthesized high-performance porous magnesia-impregnated alumina (MIPA) and studied remediation in continuous packed bed column.…”

Section: Introductionmentioning

confidence: 99%

Arsenic mitigation by chitosan-based porous magnesia-impregnated alumina: performance evaluation in continuous packed bed column

Saha

Sarkar

2015

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

Dissolved arsenic in contaminated groundwater is a major concern on a global scale due to its extreme toxicity. This paper reports a magnesium oxide-impregnated mesoporous alumina synthesized using biopolymer chitosan template. The adsorbent was first characterized by BET, SEM and EDAX analysis. The packed column performed effectively over wide range of pH and exhibited a maximum adsorption capacity of 17.2 mg/g for an input arsenic concentration of 20 mg/L. The experimental data fitted well with pseudo-second-order kinetics. Thermodynamic study on the adsorption phenomena revealed that arsenic adsorption on the porous adsorbent was spontaneous, and the process was exothermic. The arsenic sorption capacity at breakthrough point was greatly dependent on bed depth. A bed depth service time approach was adopted to describe the continuous flow system. The column after exhaustion was regenerated by eluting the bound arsenate [As(V)] with *15 bed volume sodium hydroxide solution. The adsorbent could retain its capacity up to five cycles of such regeneration. The influence of different operating conditions such as bed depth, flow rate and initial arsenic concentration was investigated statistically by the two-level full-factorial experimental designs to evaluate optimum operating conditions. Graphical abstract

show abstract

Arsenic remediation from drinking water by synthesized nano-alumina dispersed in chitosan-grafted polyacrylamide

Cited by 131 publications

References 47 publications

Preparation and Characterization of Alumina and Silica Modified Chitosan

Preparation and Characterization of Alumina and Silica Modified Chitosan

Development and treatment procedure of arsenic-contaminated water using a new and green chitosan sorbent: kinetic, isotherm, thermodynamic and dynamic studies

Arsenic mitigation by chitosan-based porous magnesia-impregnated alumina: performance evaluation in continuous packed bed column

Contact Info

Product

Resources

About