Utilization of Unwanted Terrestrial Weeds for Removal of Dyes

Singh, Anju; Kumar, Sumit; Panghal, V.P.S.; Arya, Shalini S.

doi:10.31788/rjc.2019.1245401

Cited by 7 publications

(3 citation statements)

References 23 publications

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“…7(c), the highest adsorption percentages obtained by MRC and SRC were 91.51 and 90.36%, respectively. Where the results obtained were more remarkable than CV adsorption carried out using Raw Parthenium hysterophorus and Raw Saccharum munja, which gave the respective adsorption percentages of 84.2 and 86% [36]. The percentage result of adsorption using MRC adsorbent is slightly larger than SRC adsorbent, but the difference is not too significant.…”

Section: Influence Of Contact Time and The Kinetic Studiesmentioning

confidence: 78%

Adsorption Kinetics and Isotherm of Crystal Violet by Carbon Modified with Magnetite (Fe3O4) and Triethoxyphenylsilane (TEPS) from Rubber Fruit Shell

Fajriyah

Buhani²,

Suharso³

2022

Indones. J. Chem.

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Rubber fruit shells-derived carbon (RC) modified with magnetite (MRC) and triethoxyphenylsilane (TEPS) (SRC) made from rubber fruit shells were used to adsorb crystal violet (CV) dye effectively. The RC was successfully modified by magnetite and TEPS, according to the characterization of the adsorbent utilizing Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), and scanning electron microscopy-energy-dispersive X-ray (SEM-EDX) showed that the RC was successfully modified by magnetite and TEPS. Several adsorption process parameters were investigated, and the ideal results were obtained with an adsorbent dose of 0.1 g, pH 10, contact time of 15 min, and initial concentration of CV 250 mg L−1. The MRC and SRC adsorption capacities are 71.43 and 69.93 mg g−1, respectively. The adsorption kinetics followed a pseudo-second-order model with MRC and SRC rate constants of 3.40 and 0.83 g mg−1 min−1, respectively. The Freundlich adsorption isotherm is suitable for CV dye adsorption using MRC and SRC with KF values are 1.36 and 1.76 mg g−1 L mg−1 which gives R2 0.943 and 0.932, respectively. These findings showed that the modified RC with magnetite and TEPS effectively removes the CV dye solution through the adsorption process.

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Section: Influence Of Contact Time and The Kinetic Studiesmentioning

confidence: 78%

Adsorption Kinetics and Isotherm of Crystal Violet by Carbon Modified with Magnetite (Fe3O4) and Triethoxyphenylsilane (TEPS) from Rubber Fruit Shell

Fajriyah

Buhani²,

Suharso³

2022

Indones. J. Chem.

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“…The solutions of 1 N H 2 SO 4 and 1 N NaOH were used for adjusting the pH of the metal solution before adding the adsorbent. The effect of pH, adsorbent dose, initial metal concentration, contact time, agitation speed, and temperature was assessed in batch experiments (Singh et al 2019). The conical flasks having 0.1 g dose of adsorbent with 100 ml of Cr 6+ solution were agitated in an incubator shaker at 25 °C with 150 rpm for 60 min for pH optimization.…”

Section: Batch Experimentsmentioning

confidence: 99%

Adsorption of chromium (Cr6+) on dead biomass of Salvinia molesta (Kariba weed) and Typha latifolia (broadleaf cattail): isotherm, kinetic, and thermodynamic study

2021

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This study evaluated the adsorption of Cr6+ from aqueous solution using dead biomass of aquatic plants Salvinia molesta (Kariba weed) and Typha latifolia (broadleaf cattail). The batch experiments were carried out to study the effects of pH, adsorbent dose, initial metal concentration, contact time, agitation speed in rotation per minute (rpm), and temperature. Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were used to characterize the adsorbent and analyze the functional groups and morphology of the adsorbent, respectively. The hydroxyl and amine groups were the main functional groups involved in the adsorption. Both adsorbents showed good results at pH 1, metal concentration of 20 mg/L for Cr6+ removal, and adsorption equilibrium was attained within 60 min with 150 rpm at 25 °C. The adsorption rate obtained was above 95% for both the adsorbents at a dose of 0.150 g for S. molesta and 0.8 g for T. latifolia. Isotherm and kinetic models were applied on the adsorption data. The monolayer adsorption capacity (qm) was found to be 33.33 mg/g for S. molesta and 10.30 mg/g for T. latifolia. The Langmuir isotherm was better fitted to S. molesta, while the Freundlich isotherm was better fitted to T. latifolia. It was reported that the pseudo-second-order model (R2 = 0.999) was better fitted to the adsorption data for both the adsorbents. The thermodynamic study was also conducted and found the adsorption process was exothermic and spontaneous. Results revealed the good adsorption potential of S. molesta and T. latifolia, and they can be used for the removal of hexavalent chromium.

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“…The present investigation utilizes the biologically originated “weed” adsorbent materials instead of costly AC. These weeds (WH and PH) belong to the category of waste materials, growing rapidly in a varied range of habitat, biodegradable and eco‐friendly thus promoting sustainability (Singh et al, 2019; Venugopal & Mohanty, 2011). The solar energy‐assisted electrolytic precipitation was another key cost‐cutting parameter of the present invented setup discussed, which utilizes the solar energy to run the electrolytic precipitator.…”

Section: Cost‐effectivenessmentioning

confidence: 99%

Integrated textile effluent treatment method

Bapat

Jaspal

Malviya³

2020

Water Environment Research

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Textile wastewater purification is a challenging process. Conventional wastewater treatment methods either lack in efficiency, cost-effectiveness or leads to the generation of secondary pollutants. Additionally, some treatment methods are time-consuming. The research presented in the manuscript is a blend of filtration, biosorption, aeration, solar energy-assisted electrolytic precipitation, pH balance, and germicidal treatments with an aim of reducing the suspended solids, intense color, odor, pH, chemical oxygen demand (COD), total dissolved solids (TDS), electrical conductivity (EC), and heavy metal content of textile effluent. Use of environmentally sustainable surface activated biosorbents derived from waste weeds Water Hyacinth (WH) and Parthenium Hysterophorus (PH) as an alternative to commercial grade Activated Charcoal (AC), comparison of adsorption capacities of proposed adsorbents against AC for effluent decolorization, the application of solar energy to run an electrolytic precipitator, and the unique sequential design of various unit processes like coarse and fine filtration, biosorption, aeration, electrolytic precipitation, pH treatment and germicidal UV-C treatment to treat the effluent are some of the novel methodologies explored in the present study. The invented process provides almost completely decolorized (about 90%-94%), particle-free and odorless treated water, with the acceptable levels of heavy metals (Lead-not detected, Arsenic-not detected, Zinc-0.5-0.8 mg/L), TDS (1,500-1,850 mg/L), COD (149-169 mg/L) pH (7.1-7.15), and EC (2.5-2.8 mMhos/ cm) as some of the important parameters, fitting well within the standard pollution limits. Performance efficiency estimation and statistical modeling were done for the data using the t test and f test. The values obtained were (t = 2.78 and f = 4.99 for treated WH against AC) and (t = 3.00 and f = 5.38 for treated PH against AC at 0.05 level of significance) as an essential part of the manuscript, proving the supremacy of the proposed process to achieve the standard pollution norms. Cost-effectiveness was an integral factor addressed in the proposed design, recorded a 1.7 USD per 1,000 L of input effluent, which was well below than most of the reported studies. The invented method in the present investigation thus provides an integrated, efficient, eco-friendly, and cost-effective solution to wastewater treatment.

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Utilization of Unwanted Terrestrial Weeds for Removal of Dyes

Cited by 7 publications

References 23 publications

Adsorption Kinetics and Isotherm of Crystal Violet by Carbon Modified with Magnetite (Fe<sub>3</sub>O<sub>4</sub>) and Triethoxyphenylsilane (TEPS) from Rubber Fruit Shell

Adsorption Kinetics and Isotherm of Crystal Violet by Carbon Modified with Magnetite (Fe<sub>3</sub>O<sub>4</sub>) and Triethoxyphenylsilane (TEPS) from Rubber Fruit Shell

Adsorption of chromium (Cr6+) on dead biomass of Salvinia molesta (Kariba weed) and Typha latifolia (broadleaf cattail): isotherm, kinetic, and thermodynamic study

Integrated textile effluent treatment method

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