Characterization, isotherm and kinetic data for adsorption of Congo red and 2-naphthol on different bamboo hydrochars

Yin, Li; Meas, Arun; Shan, Shengdao; Yang, Renqiang; Gai, Xikun; Wang, Hongpeng; Tsend, Nyamkhand

doi:10.1016/j.dib.2018.04.066

Cited by 8 publications

(3 citation statements)

References 3 publications

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“…It is well known that electrostatic attraction exists between the negative charge of the anionic dye and the protonated -OH and -COOH groups on the surface of the biochars as pH was lower than pH ZPC . Therefore, the lower pH below the pH ZPC will facilitate adsorp- Bamboo hydrochars Congo red 33.7 [46] Vermicompost-derived biochars Congo red 20 [43] Calcium-rich biochar from crab shell Congo red 20.317 [47] Biochar from liquefaction of rice with water Malachite green dye 46.6 [48] Coir pith carbon Congo red 6.7 [49] Biochar produced from TFW at 600 °C SFR dye 62.7 This work tion. When the pH was higher than pH ZPC , the functional groups of the biochars were completely deprotonated and the electrostatic attraction was weakened with the pH increase, resulting in the decrease of SFR adsorption.…”

Section: Effect Of Phmentioning

confidence: 98%

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: Effect Of Phmentioning

confidence: 98%

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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“…Dyes have complex molecular structures that are difficult to degrade in the natural environment and can pose a serious risk to the environment [12]. Congo red (CR), one of the common dyes, is a structurally complex anionic dye containing a biphenyl group and two naphthalene units that are difficult to degrade by adsorption [13]. It is more representative of organic dyes.…”

Section: Introductionmentioning

confidence: 99%

Simple Preparation of Lignin-Based Phenolic Resin Carbon and Its Efficient Adsorption of Congo Red

Su,

Li,

Wang

et al. 2023

Water

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Biomass porous carbon is a low-cost, environmentally friendly material with no secondary pollution and has great potential in the field of dye pollutant adsorption. In this work, we used lignin, a renewable resource abundant in nature, to completely replace phenol and develop a lignin-based phenolic resin carbon (LPFC) adsorbent with high dye removal capacity, high recyclability, and low production cost. The samples were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, and Raman spectroscopy. Then the effects of adsorbent dosage (1 g/L, 2 g/L, 3 g/L, 4 g/L, and 5 g/L), temperature (30 °C, 45 °C, and 60 °C), initial dye concentration (100, 200, 300, 400, 500, 600, 700, and 800 mg/L), and pH (3, 4, 6, 8, 10, and 12) on the adsorption capacity were investigated during the adsorption process. The experimental results showed that the pore structure of LPFC was richer and more graphitized than that of phenolic resin carbon (PFC). The adsorption performance of LPFC on CR was better than that of PFC. The adsorption characteristics of LPFC were investigated from the adsorption isotherm and kinetic perspectives. The Langmuir isothermal adsorption model and the proposed second-order kinetic model were able to fit the adsorption data better. The adsorption process preferred monolayer adsorption, and the proposed second-order model predicted a maximum adsorption capacity of 425.53 mg/g. After five cycles, the removal of CR by LPFC only decreased from 92.1 to 79.2%. It can be seen that LPFC adsorbents have great potential in the field of wastewater treatment and can effectively realize the high-value application of lignin.

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“…The adsorption process has been utilized as a suitable model for Congo red removal. Thus, various adsorbents with different adsorption capacities have been proposed [2][3][4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Studies on the Removal of Congo Red Dye by an Adsorbent Based on Fly-Ash@Fe3O4 Mixture

et al. 2022

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The effectiveness of a Fe3O4-loaded fly ash composite for the adsorption of Congo red dye was assessed in this work. The structure and properties of the magnetic adsorbent were established by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffractometer (XRD), vibrating sample magnetometer (VSM), and dynamic light scattering (DLS). The magnetic results showed a saturation magnetization value of 6.51 emu/g and superparamagnetic behavior. The main parameters that influence the removal of Congo red dye adsorbent such as dose, initial concentration, and contact time were examined. The Freundlich adsorption isotherm and pseudo-second-order kinetic model provided the best fit for the experimental findings. The Congo red dye’s maximum adsorption capacity of 154 mg/g was reported in the concentration range of 10–100 mg/L, using the proposed magnetic adsorbent. The results of the recyclability investigation demonstrated that the circular economy idea is valid. The adsorbent that was synthesized was also further characterized by XRD and FTIR techniques after Congo red dye adsorption.

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Characterization, isotherm and kinetic data for adsorption of Congo red and 2-naphthol on different bamboo hydrochars

Cited by 8 publications

References 3 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

Simple Preparation of Lignin-Based Phenolic Resin Carbon and Its Efficient Adsorption of Congo Red

Studies on the Removal of Congo Red Dye by an Adsorbent Based on Fly-Ash@Fe3O4 Mixture

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