Comparative Desorption Studies on Remediation of Remazol Dyes Using Biochar (Sorbent) Derived from Green Marine Seaweeds

Ravindiran, Gokulan; Jeyaraju, Raja Murugadoss; Jegan, J.; Alagumalai, Avinash

doi:10.1002/slct.201901348

Cited by 23 publications

(4 citation statements)

References 34 publications

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“…This regeneration yield could be significantly improved if successive cycles were applied. This finding could be attributed to the fact that the adsorption is dominated by electrostatic interaction and hydrogen bonding in the adsorption process [55,56]. The fact that these adsorbents have the ability to be easily regenerated, confirms that they could be considered as attractive and promising materials for anionic dye removal from aqueous solution.…”

Section: Desorption Testmentioning

confidence: 99%

Industrial dye removal from tannery wastewater by using biochar produced from tannery fleshing waste: a road to circular economy

Haddad¹,

Hantous²,

Chagtmi³

et al. 2022

Comptes Rendus. Chimie

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In this study, the capacity of biochars, derived from the pyrolysis of tannery fleshing waste (TFW) at 400 °C; 500 °C and 600 °C, in removal of red dye Sella Fast Red (SFR) from aqueous solutions and tannery wastewater was investigated under various experimental conditions in batch mode. Results show that for all applied biochars, the removed kinetics data were well fitted by the pseudo-second-order model, and the equilibrium state was obtained after 240 min of contact time. For an aqueous pH of 6 and a red dye concentration of 75 mg•L −1 , the removed amounts increased from 26 mg•g −1 to 39.86 mg•g −1 when the used pyrolysis temperature was increased from 400 °C to 600 °C. Moreover, SFR adsorption data at equilibrium were well fitted by Langmuir model suggesting a probable monolayer adsorption process with a maximal removal capacity of 62.7 mg•g −1 for BTFW-600 °C. The thermodynamic study demonstrated that SFR adsorption was endothermic for the three tested biochars. Desorption experiments with distilled water proved that SFR was significantly desorbed from the tested biochars, which offers possible reusability. On the other hand, BTFW-600 °C has demonstrated an important ability in removing SFR from real wastewater since only one dosage of 15 g•L −1 was enough to ensure more than 97% of dye removal. According to pH ZC and FTIR analysis, the possible mechanism toward SFR dye removal was attributed to electrostatic interactions that occurred between biochar and functional groups of SFR. This work could provide guidance for the value-added utilization of tannery solid waste and a practical way to remove dyes from tannery wastewater.

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Section: Desorption Testmentioning

confidence: 99%

Industrial dye removal from tannery wastewater by using biochar produced from tannery fleshing waste: a road to circular economy

Haddad¹,

Hantous²,

Chagtmi³

et al. 2022

Comptes Rendus. Chimie

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show abstract

“…The reckless release of azo dyes into the environment, especially from the textile industry, is of great concern to both human health and the environment [12]. One of the unit activities in the chemical engineering procedures used to treat the wastewater from the textile industry is adsorption [13]. Due to the ease of the procedure and reduced cost compared to other processes, adsorption is a well-established technology for azo dye removal from wastewater [14].…”

Section: Introductionmentioning

confidence: 99%

Valorization of Annona reticulata biochar by chitosan for the adsorption of Azo dye from Textile effluent

2023

Global NEST: The International Journal

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<p>Azo dye is a synthetic aromatic dye which are direct dye frequently used in textile industry to colour fibres. It also contributes to the damage of the environment. This study examines the adsorption biochar made from Annona reticulata to remove azo dye from textile wastewater. To improve the adsorption capacity, biochar valorized by chitosan molecules, Investigations were conducted on the use of chitosan-based materials that are acid-resistant for azo dye adsorption. In the batch experiment, basic operating parameters such as initial Azo dye concentrations, pH, contact time and bed height were assessed. The percentage removal efficiency for Azo dye was recorded as 67.18%, 75.88% and 94.37% for three dissimilar sized columns that were 6cm, 8cm, and 10cm. The UV–visible absorption spectroscopy was used to quantify the decolorization of dyes. The changed surface properties of the adsorbent produced from Annona reticulata were characterized by using SEM, XRD, and FTIR. The effectiveness of the column's adsorption was calculated mathematically by Yoon-Nelson, Thomas, and Adams-Bohart models. The model that best represents equilibrium isotherm data by adsorption had R2 values of 94.63, 86.67 and 96.35 respectively.</p>

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“…Sorption is the method used when both adsorption and absorption occur at the same time . Adsorbent and adsorbate are additives used in the adsorption process (Ravindiran et al, 2019). The substance on which adsorption occurs is known as the adsorbent.…”

Section: Introductionmentioning

confidence: 99%

Perchlorate captured by activated carbon derived from dates seed through adsorption technique

2023

Global NEST: The International Journal

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<p>In the present research packed bed column with activated carbon which is derived from the natural available dates seed used for exclusion of perchlorate from aqueous sample. The effect of several variables on adsorption performance has been studied, including inlet ion concentration, flow rate, bed height, and temperature.The adsorbent was prepared in two different temperature 400℃ and 800℃ and the depth of column was 5cm and 8cm. The findings showed that the activated column at 400℃ in the depth of 5cm was saturated at 320 min and for 8cm column it is saturated at 300 min. Likewise for 800℃ columns in the depth of 5cm the treatment efficiency attained at 220 min and for 8cm column it was 180 min. It is showed that the optimal flow rate and bed height increase adsorption effectiveness. Gas chromatography (GC) was used to determine the perchlorate concentration in liquid sample after treatment process. The Thomas and Thomson mathematical models were utilized to determine the column's adsorption efficacy, with the maximum R2value of 0.985 for 800°C in an 8 cm column with a removal efficiency of 98.1%. The surface morphology was examined with SEM, FTIR and XRD which proves that the pore changes in the morphology of the adsorbent created homogeneous to heterogeneous formation structure. This comprehensive study shown that activated carbon generated from dates seed is a successful adsorbent for the removal of perchlorate at optimal temperature and bed depth</p>

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Comparative Desorption Studies on Remediation of Remazol Dyes Using Biochar (Sorbent) Derived from Green Marine Seaweeds

Cited by 23 publications

References 34 publications

Industrial dye removal from tannery wastewater by using biochar produced from tannery fleshing waste: a road to circular economy

Industrial dye removal from tannery wastewater by using biochar produced from tannery fleshing waste: a road to circular economy

Valorization of Annona reticulata biochar by chitosan for the adsorption of Azo dye from Textile effluent

Perchlorate captured by activated carbon derived from dates seed through adsorption technique

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