Bengal gram seed husk as an adsorbent for the removal of dyes from aqueous solutions – Equilibrium studies

Reddy, Mohan M.; Nirmala, V.

doi:10.1016/j.arabjc.2013.09.002

Cited by 16 publications

(3 citation statements)

References 47 publications

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“…Bansal et al (27) have also shown that the removal of Cr (VI) by BRH (pre-boiled rice husk) ranged from 33.2% to 71% with various adsorbent doses of 4.0 g to 20.0 g/L and the removal of Cr (VI) by FRH (Formaldehyde treated rice husk) ranged from 38% to 76.5% with various doses of 4.0 g to 20.0 g/L. Somasekhara Reddy et al (30) studied the removal of dyes by Bengal gram seed husk. It was shown that the uptake of dyes by the adsorbent rose when adsorbent mass increased from 0.1 to 0.2 g.…”

Section: Effect Of the Amount Of Chaff On Biosorptionmentioning

confidence: 95%

Removal of Nitrate From Aqueous Solution Using Rice Chaff

Dehghani

Shahsavani

Shamsedini

et al. 2015

Jentashapir J Health Res

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Background: Nitrate is largely dissolved in the surface and ground water, due to its high solubility. Continual uptake of nitrite through drinking water can lead to problems and diseases (such as blue baby) for humans, especially children. Objectives: The aim of this study was to develop a new and inexpensive method for the removal of nitrate from water. In this regard, the possibility of using chaff for removal of nitrate from aqueous solutions was studied and the optimum operating conditions of nitrate removal was determined. Materials and Methods: This is a cross-sectional study conducted in laboratory scale. The UV spectrophotometer at a wavelength of maximum absorbance (220 nm) was used to determine the nitrate concentration. The effect of pH, amount of chaff, temperature, and contact time were investigated. Results: The result of this study revealed that chaff as an absorbent could remove nitrate from solutions, and the efficiency of adsorption increased as contact time increased from 5 to 30 minutes, amount of chaff increased from 1 to 3 g, temperature increased in a range of 300-400°C and the amount of pH decreased from 10 to 3. The maximum adsorption rate was around pH 3 (53.14%). Conclusions: It was shown that the removal efficiency of nitrate was directly proportional to the amount of chaff, temperature, and contact time but inversely to the pH. This study showed that nitrate removal by chaff is a promising technique.

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Section: Effect Of the Amount Of Chaff On Biosorptionmentioning

confidence: 95%

Removal of Nitrate From Aqueous Solution Using Rice Chaff

Dehghani

Shahsavani

Shamsedini

et al. 2015

Jentashapir J Health Res

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“…10-11). The dimensionless equilibrium parameter (R L ) used to express the essential characteristics of Langmuir adsorption isotherm is expressed by the following relationship (4) (Somasekhara and Nirmala, 2013):…”

Section: Adsorption Isotherm Investigation For Mb Dyementioning

confidence: 99%

“…where, K L is Langmuir constant (L/mg) and C i (mg/L) is the initial concentration of MB dye. The value of R L indicate the type of Langmuir isotherm to be irreversible if (R L = 0), linear if (R L = 1), unfavorable if (R L > 1) and favorable if (0 < R L <1) (Somasekhara and Nirmala, 2013). The Freundlich isotherm model assumes that the adsorption process takes place on different surfaces.…”

Section: Adsorption Isotherm Investigation For Mb Dyementioning

confidence: 99%

Investigation of Methylene Blue Dye Adsorption from Polluted Water Using <i>Oleander</i> Plant (<i>Al Defla</i>) Tissues as Sorbent

Abu‐El‐Halawa¹,

Zabin²,

Abu-Sittah³

2016

American Journal of Environmental Sciences

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The main purpose of this research was to investigate the ability of Oleander plant (Al Defla) tissues to adsorb Methylene Blue (MB) dye from polluted water. The experiments were carried out through batchadsorption technique to investigate the influence of the following experimental parameters on adsorption process namely, adsorbent quantity, MB initial concentration, adsorbent particles size, ionic strength, pH and temperature. The observation indicated an ability of the plant tissues to adsorb MB from water. Adsorption of Methylene Blue was increased on increasing the temperature, pH, adsorbent amount and the initial dye concentration factors. While it decreases with increase of salt concentration and increase of the adsorbent particles size. Plant fruit clusters are more likely to adsorb MB dye from water than leaves. Langmuir and Freundlich isotherms were used to model the adsorption data, which was fitted with these models. The isotherms parameters indicated that the adsorption was monolayer physical process.

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