Biosorption of cadmium metal ions on raw and chemically modified walnut shells

Gondhalekar, Sachin C.; Shukla, S. R.

doi:10.1002/ep.12161

Cited by 23 publications

(6 citation statements)

References 28 publications

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“…A number of works dealing with the ability of shells of various types of fruit (hazelnuts [ 29 , 30 , 31 ], almonds [ 30 , 32 , 33 , 34 ], walnuts [ 35 , 36 , 37 , 38 , 39 , 40 ], groundnut [ 41 , 42 , 43 , 44 ], pistachios [ 30 , 45 , 46 ], coconuts [ 47 , 48 , 49 , 50 , 51 ], etc.) to sorb metal ions from the aqueous environment can also be found in the literature sources.…”

Section: Introductionmentioning

confidence: 99%

Use of Different Types of Biosorbents to Remove Cr (VI) from Aqueous Solution

Pertile

Dvorský

Václavík

et al. 2021

Life

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This article summarizes the results of a research study that was focused on the possibility of removing Cr (VI) from aqueous solution, using low-cost waste biomaterial in a batch mode. A set of seven biosorbents was used: Fomitopsis pinicola, a mixture of cones, peach stones, apricot stones, Juglans regia shells, orange peels, and Merino sheep wool. Three grain fractions (fr. 1/2, fr. 0.5/1.0, and fr. 0/0.5 mm) of biosorbents were studied. The aim was to find the most suitable biosorbent that can be tested with real samples. The influence of other factors on the course of biosorption was studied as well (chemical activation of the biosorbent, pH value, rotation speed during mixing, temperature, and the influence of biosorbent concentration). The use of chemical activation and adjustment of the pH to 1.1 to 2.0 make it possible to increase their sorption capacity and, for some biosorbents, to shorten the exposure times. Two kinetic models were used for the analysis of the experimental data, to explain the mechanism of adsorption and its possible speed control steps: pseudo-first and pseudo-second-order. The pseudo-second-order kinetic model seems to be the most suitable for the description of the experimental data. The thermodynamic parameters suggest that the biosorption was endothermic and spontaneous. In the biosorption equilibrium study, the adsorption data were described by using Langmuir and Freundlich adsorption isotherms. The Langmuir model was applicable to describe the adsorption data of all biosorbents. Both models are suitable for chemically treated sheep fleece and peach stones.

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Section: Introductionmentioning

confidence: 99%

Use of Different Types of Biosorbents to Remove Cr (VI) from Aqueous Solution

Pertile

Dvorský

Václavík

et al. 2021

Life

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“…TEM analysis was carried out with Transmission Electron Microscope (TEM) (FEI, TECNAI G2 microscope) to measure the dimension of the magnetite impregnated PVH. The FTIR spectroscopy was employed to identify the functional groups present on magnetite impregnated PVH and to certify the adsorption of Cr(VI) onto this nanosized developed adsorbent . In FTIR analysis, the magnetite impregnated PVH samples before and after Cr(VI) treatment were mixed with KBr in a ratio of 1:100 for to prepare the KBr pallet and then characterized by FTIR spectrophotometer (Nicolet 5700 FTIR, Thermo electron corporation, Norcross, GA).…”

Section: Methodsmentioning

confidence: 99%

Fixed bed column adsorption of Cr(VI) from aqueous solution using nanosorbents derived from magnetite impregnated Phaseolus vulgaris husk

Srivastava

Agrawal

Mondal

2018

Env Prog and Sustain Energy

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Phaseolus vulgaris husk impregnated with magnetite (Fe3O4) was successfully synthesized by co‐precipitation method as nanosorbents for characterization study and utilized for Cr(VI) biosorption from aqueous solution. Scanning electron microscopy, transmission electron microscopy, Fourier Transform infrared spectroscopy, and BET techniques were applied for nanosorbent characterization. In fixed bed column condition, influence of important process parameters like pH, influent concentration, flow rate, and bed height on adsorption of Cr(VI) by magnetite impregnated P. vulgaris husk were investigated. Maximum adsorption capacity at pH 1.16, influent Cr(VI) concentration 100 mg/L, flow rate 5 mL/min, and bed depth of 3.2 cm was calculated to be 53.28 mg/g. The breakthrough time and column exhaustion time showed inverse relation with pH, influent concentration, flow rate, and direct with bed depth. Bohart–Adams, Thomas, and Yoon–Nelson models were used to predict column performance. Compared to Bohart–Adams, Thomas, and Yoon–Nelson models fitted well to experimental data. © 2018 American Institute of Chemical Engineers Environ Prog, 38: S68–S76, 2019

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“…One of the most significant applications for walnut shells comprised of activated carbon is the adsorption of pollutants from aqueous solutions. Walnut-based adsorbents are the next-generation adsorbents for the removal of emerging pollutants, particularly heavy metal ions [38]. Gondhalekar and Shukla (2015) used an ion-exchange technique in their work to remove Cadmium (II) metal ions from aqueous solutions using untreated walnut shells [39].…”

Section: Walnutmentioning

confidence: 99%

Macadamia Nut Bio-Waste: An Agricultural Waste with Potential to Be Used as Carbon Support Material in Fuel Cell Applications

Mojapelo,

Seroka,

Khotseng

2023

Coatings

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Nutrient resources account for an enormous quantity of the world’s waste materials. According to recent research, nuts and their byproducts are good for a variety of applications and are important natural resources for nutrition. Waste and nut residues in the environment could cause environmental problems. A critical issue is how this waste is employed in various applications. Nuts contain important chemicals that could be used to build catalytic nanomaterials. A variety of heterogeneous catalysts can be created directly from different parts of nuts, such as the shell, kernel, extracts, and so on, or they can be used as nanoparticle stabilizing and reducing agents. Nuts and their wastes can be particularly essential in evolution reactions, oxidation reactions, hydrolysis, pollutant degradation, and so on due to their extraordinary chemical properties. Natural substances such as biopolymers, zeolites, diatomites, agricultural wastes (such as rice husk, bagasse pith, coconut shell, and so on), and nut wastes are used to make inexpensive catalysts. This review focuses on the industrial benefits and future applications of these commercially feasible green resources to change, for the first time, the production of nanomaterials from nuts as environmentally friendly resources and their catalytic applications.

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Biosorption of cadmium metal ions on raw and chemically modified walnut shells

Cited by 23 publications

References 28 publications

Use of Different Types of Biosorbents to Remove Cr (VI) from Aqueous Solution

Use of Different Types of Biosorbents to Remove Cr (VI) from Aqueous Solution

Fixed bed column adsorption of Cr(VI) from aqueous solution using nanosorbents derived from magnetite impregnated Phaseolus vulgaris husk

Macadamia Nut Bio-Waste: An Agricultural Waste with Potential to Be Used as Carbon Support Material in Fuel Cell Applications

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