Activated carbonaceous materials from tea waste and its removal capacity of indigo carmine present in solution: synthesis, batch and optimization study

Sikdar, Dolanchapa; Goswami, Sudipta; Das, Papita

doi:10.1186/s42834-020-00070-8

Cited by 40 publications

(21 citation statements)

References 50 publications

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“…Distribution coe cient, K d (L g -1 ) was calculated using equation Gibb's free energy (ΔG kJmol -1 ) was evaluated using equation 6 and 7 [22]:…”

Section: Sorption Experimentsmentioning

confidence: 99%

Preparation of green synthesized copper oxide nanoparticles for efficient removal of lead from wastewaters

Zarrabi

Ghasemi-Fasaei

2021

Preprint

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Green synthesis is a clean and eco-friendly process in which metal nanoparticles can be produced via reaction between a metal salt solution and plant organ extract. In present study, three copper oxide nanoparticles were synthesized using green synthesis processes from the leaf extracts of selected plants as abundant plant cover in the study area including astragalus (Astragalus membranaceus), rosemary (Salvia rosmarinus) and mallow (Malva sylvestris). The effectiveness of three green synthesized nanoparticles in the adsorption of lead ions from a polluted water was studied under laboratory conditions. According to the results, the removal efficiencies of the copper oxide nanoparticles synthesized from astragalus (A-CuO-NPs), rosemary (R-CuO-NPs) and mallow leaf extract (M-CuO-NPs) especially at the highest initial concentration of Pb (1.5 mM) were 88.4 %, 84.9 % and 69.6 %, respectively. Most probably due the smooth morphology and more uniform configuration of the M-CuO-NPs, the changes between equilibrium adsorption (qe) and equilibrium concentration (Ce) were more regular than those of the A-CuO-NPs and R-CuO-NPs. Accordingly the best fitted data to Langmuir and Freundlich isotherms were observed in the adsorption of Pb onto the M-CuO-NPs. Despite the lowest removal efficiency of the M-CuO-NPs, with the equal volumes of each leaf extract and CuSO4.5H2O solution (20 mM), the most produced dry weight was observed for these nanoparticles (4.3 g per 100 mL of leaf extract). According to the results reported herein, the copper oxide nanoparticles synthesized from different plant covers are efficient adsorption agents for Pb from wastewaters.

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“…Distribution coe cient, K d (L g -1 ) was calculated using equation Gibb's free energy (ΔG kJmol -1 ) was evaluated using equation 6 and 7 [22]:…”

Section: Sorption Experimentsmentioning

confidence: 99%

Preparation of green synthesized copper oxide nanoparticles for efficient removal of lead from wastewaters

Zarrabi

Ghasemi-Fasaei

2021

Preprint

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“…Here are Langmuir and Freundlich models were discussed in this study. Langmuir isotherm is valid for monolayer adsorption with the surface of activated green waste tea residue as adsorbent (Sikdar, Goswami, and Das 2020) while the heterogeneous surface with multilayer adsorption is suggested by Freundlich model (Jeppu and Clement 2012). The equation below can be used to express the Langmuir isotherm:…”

Section: Adsorption Isotherm Modelingmentioning

confidence: 99%

“…Due to its efficiency and low cost, ADS has been recommended as a technology for removing Cu and Ni metals from water and wastewater. It does not produce secondary sludge (Sikdar, Goswami, and Das 2020). Adsorbents such as lignocellulosic biomasses (Narendrakumar and Senthil 2020), fly ash (Buema et al 2021), powdered marble wastes (Mehta, Mondal, and George 2016), activated carbon (Rahimian and Zarinabadi 2020), clays and biochars (Yao et al 2014) have all been used to remove contaminants including metal ions in adsorption method.…”

Section: Introductionmentioning

confidence: 99%

Waste tea residue adsorption coupled with electrocoagulation for improvement of copper and nickel ions removal from simulated wastewater

Nizeyimana

Lin

Khan

et al. 2021

Preprint

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The present research deals with the removal of copper and nickel ions from synthesized wastewater by using simple, cheap, cost-effective and sustainable activated green waste tea residue (AGWTR) adsorption coupled with electrocoagulation (ADS/EC) process in presence of iron electrode. Considering previous studies, their adsorbents used for treating their wastewaters firstly activate them by applying either chemicals or activating agents. Our adsorbent was prepared without applying neither chemicals nor any activating agents. The operating parameters of both metals were optimized: pH (4.0), hydraulic retention time (HRT = 30 min), adsorbent dose (1 mg.L− 1), initial concentration (20 mg.L− 1) and Fe-Fe electrode was found to be better with compared to the other electrodes with a current density of 1.19 mA/cm2. In the process of ADS/EC, The removal efficiency was obtained as 100% for copper and 99.99% for nickel ions. After the ADS/EC process, Fourier transform infrared (FT-IR) spectroscopy, Scanning Electron Microscopy (SEM) and EDS analysis were used to characterize the adsorbent green waste tea residue. The results showed seven clear peaks of functional groups that were detected in the range of 1000–4000 cm− 1, the rough-stone-like with various larger holes and higher amounts of carbon containing traces of different elements, respectively. The adsorption isotherm and kinetic model results showed that the Langmuir and the pseudo-second-order were well-fitted to the adsorption experimental data better than the Freundlich and pseudo-first-order models for both Cu2+ and Ni2+ with their maximum adsorption capacity of 15.6 and 15.9 mg.g− 1, respectively. These indicate that the dominant adsorption occurs in a monolayer of homogeneous adsorbent surfaces on AGWTR and its kinetic mechanism belongs to chemical adsorption. Based on the above results, it is well understood that the use of the ADS coupled with EC technique is the cheapest compared with single ADS and EC technique for heavy metal removal due to remarkable low adsorption dose, energy consumption and also it is a suitable technique for developind countries. Therefore, the AGWTR shows the greatest potential to improve the quality of water contaminated with different heavy metals in the environment.

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“…Dyes have characteristics of synthetic origin and a complex molecular structure that makes them more stable and difficult to biodegrade (Ghaedi et al, 2014). The various dyes that exist in industrial effluents can present adverse environmental effects, as they cause a change in the color of waters, reducing sunlight penetration and photosynthetic activities (Sikdar et al, 2020). As a result, ecological damage can spread downstream to agricultural or aquaculture areas, affecting aquatic flora and fauna (Abbas and Trari, 2020).…”

Section: Introductionmentioning

confidence: 99%

Characterization of Activated Carbon Prepared From the Nucleus of Ziziphus Lotus (NBEG): Isothermal Study and Kinetics of Adsorption of Methylene Blue

Touzani

Fikri-Benbrahim

Ahlafi

et al. 2021

Preprint

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Ziziphus lotus (Nbeg) is very common in Morocco where it occupies various ecosystems and presents different interests; however it remains devalued and knows recent deterioration due to the human pressure through clearing, wood collection, irrational cuts’ exploitation and overgrazing. This study aims to prepare activated carbon from the cores of this interesting biomaterial, for the first time to the best of our knowledge, according to a manufacturing process based on its chemical and thermal activation. The cores of Ziziphus lotus (Nbeg) were chemically activated by sulfuric acid (H2SO4, 98%) for 24h with a mass contribution (1:1), and then carbonized at a temperature of 500 °C for 2 hours. The obtained activated carbon was characterized by scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy and specific surface measurement. These characterization results showed an important porosity and a surface structure having acid groups and carboxylic functions. The adsorption of methylene blue (MB) was evaluated, by Langmuir and Freundlich models examination, in order to explain the adsorption efficiency in a systematic and scientific way. Also pseudo-first order and pseudo-second order kinetic models were used to identify the possible mechanisms of this adsorption process. The results showed that the MB adsorption process on activated carbon follows the Langmuir model and that the adsorption kinetic is best represented by kinetics data of the pseudo-second order model. Therefore, Z. lotus can be used as a low-cost available material to prepare a high quality activated carbon having a promising potential in the wastewater treatment.

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Activated carbonaceous materials from tea waste and its removal capacity of indigo carmine present in solution: synthesis, batch and optimization study

Cited by 40 publications

References 50 publications

Preparation of green synthesized copper oxide nanoparticles for efficient removal of lead from wastewaters

Preparation of green synthesized copper oxide nanoparticles for efficient removal of lead from wastewaters

Waste tea residue adsorption coupled with electrocoagulation for improvement of copper and nickel ions removal from simulated wastewater

Characterization of Activated Carbon Prepared From the Nucleus of Ziziphus Lotus (NBEG): Isothermal Study and Kinetics of Adsorption of Methylene Blue

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