Investigation of rice husk derived activated carbon for removal of nitrate contamination from water

Satayeva, Aliya; Howell, Carol; Korobeinyk, Alina V.; Jandosov, J.; Inglezakis, Vassilis J.; Mansurov, Z. A.; Mikhalovsky, Sergey V.

doi:10.1016/j.scitotenv.2018.02.329

Cited by 97 publications

(33 citation statements)

References 54 publications

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“…Chlorine, the zinc and potassium elements originated from the activation agents (ZnCl 2 and KOH). However, the other elements (Si, S, Ca Cu, Al, Br) are naturally present on the rice straw, and are probably present in residual ashes, similar to the previously published results [31,47,48]. Since their preponderance is lower, we will consider that all ACs are structurally formed by only carbon and oxygen elements.…”

Section: Resultssupporting

confidence: 83%

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Structural-Property Relationship in Activated Carbon Synthesized from Rice Straw for Electronic Application

daiem¹,

Alotaibi²,

Alosime³

et al. 2020

Pol. J. Environ. Stud.

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Activated carbons have been prepared from rice straw by considering the material forms of rice straw, the chemical activation agent and the preparation method. The study seeks optimal conditions for giving better mico-and nano-properties, and to support the corresponding molecular structure. All the obtained results are referred to those of a commercial sample. Fourier transform infrared absorption, X-ray photoelectron spectroscopy, and dispersive X-ray spectroscopy are combined to determine functional groups. Moreover, a quantum chemical calculation has been done using density functional theory to argue the proposed molecular structure. Principally, the vibrational properties are compared to experimental results, and the corresponding electronic structure is calculated. Thermal stability and eventual reactions are evidenced by both differential and gravimetric thermal analysis. The surface topography of the resulting activated carbon is checked by scanning electron microscope and correlated with their chemical and textual characteristics carried out from Brunauer, Emmett and Teller analysis. Results illustrate that the resulting product is a mixture of carbon graphic structure and acidic/basic entities and exhibit a global acidic pH. The use of KOH as oxidant agent and the ground raw material form leads to obtain good properties such as higher surface area and higher porosity. Based on the size compatibility making it possible to introduce low-radius single-walled carbon nanotubes, the electronic structures of the prepared activated carbon and that of chiral (5,5) SWCNTs and their corresponding *

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Section: Resultssupporting

confidence: 83%

“…Note: Numbers in bold print are statistically significant Table 7 summarizes the EDX quantitative elemental analysis. Data show that the obtained products are essentially composed by carbon and oxygen, as is the case with ACs [47]. Other chemical elements with lower contents are also present (less than 1%).…”

Section: Resultsmentioning

confidence: 68%

Structural-Property Relationship in Activated Carbon Synthesized from Rice Straw for Electronic Application

daiem¹,

Alotaibi²,

Alosime³

et al. 2020

Pol. J. Environ. Stud.

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“…Rice husk (RH) as an abundant biowaste with low combustion value and damage to the environment can bring the issue of its sustainable utilization . However, RH can be converted to biofuels (e.g., syngas) through the pyrolysis at high temperatures .…”

Section: Introductionmentioning

confidence: 99%

Rice Husk‐Derived Activated Carbons for Adsorption of Phenolic Compounds in Water

Shen

2018

Global Challenges

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Activated carbons are synthesized from rice husk by one‐ and two‐step pyrolysis. In general, two‐step pyrolysis produces a higher yield of activated carbons. The yield of activated carbon decreases with the increase of mass ratio of KOH and biomass, which has a significant impact on the development of surface area and porosity. The maximum S BET (2138 m 2 g −1 ) is achieved with micro‐ and mesoporous structures, which is favored for the adsorption process. The activated carbons can efficiently remove phenol from water by a few minutes. In particular, the maximum adsorption capacity (201 mg g −1 ) is achieved due to the excellent surface textural properties. The Langmuir model can better define the adsorption isotherm. The high correlation coefficient value ( R 2 = 0.9991) indicates a monolayer adsorption behavior. The adsorption process can be well‐fitted by the pseudo‐second‐order model. Herein, the phenol molecules pass into the internal surface via liquid‐film‐controlled diffusion, so the behavior of phenol adsorption onto activated carbons is mainly controlled via chemisorption. In addition, the functional groups on the outer surfaces of activated carbons can attract the phenol molecules onto their internal surface via the “π–π dispersion interaction” and “donor–acceptor effect.”

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“…It has been reported that activated carbon obtained from RH be used in water and air purification. Moreover, it could be used as anode material for lithium‐ion batteries and for supercapacitors . Rice‐husk pyrolysis has also been used to generate syngas, which can be used to produce electricity …”

Section: Direct Utilization Of Agro‐wastesmentioning

confidence: 99%

Biomass as a sustainable resource for value‐added modern materials: a review

Sharma

Kaur

Punj

et al. 2020

Biofuels Bioprod Bioref

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Over the past century, the world's population has increased greatly. The growth in the population has increased the global food demand, so the food sector has increased its production. As a result of the increased production and consumption, a huge amount of agro-food waste is being generated yearly. Rice husk, wheat straw, sugarcane bagasse, corn husk, peanut shell, eggshell, are just a few examples of agro-food wastes. As these agro-food wastes and their by-products are left unused and unattended, their amount is increasing globally. It is imperative to find ways to put these wastes to environmentally viable use. These wastes find direct uses in biofertilizers, mud houses, animal feed, biofuel, and heat generation in small-scale industries, etc. After heat generation, ashes are considered as a secondary by-product, which can be used as a sustainable and renewable resource for synthesizing value-added products for various applications. This article presents a review of the traditional and advanced methods of utilizing these wastes in household applications, animal feed, fertilizers, fuel generation, pyrolysis, and for the removal of toxic metals from polluted water. These secondary resources can also be used in construction materials and for the synthesis of glasses and glass-ceramics, which can be used in bioengineering, optical, and dielectric materials. Agrofood wastes can be used as resource materials to develop modern materials with better properties instead of using minerals. This not only reduces the environment-and management-related problem of the wastes but also provides a sustainable alternative way to produce cost-effective value-added materials for the benefit of society.

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Investigation of rice husk derived activated carbon for removal of nitrate contamination from water

Cited by 97 publications

References 54 publications

Structural-Property Relationship in Activated Carbon Synthesized from Rice Straw for Electronic Application

Structural-Property Relationship in Activated Carbon Synthesized from Rice Straw for Electronic Application

Rice Husk‐Derived Activated Carbons for Adsorption of Phenolic Compounds in Water

Biomass as a sustainable resource for value‐added modern materials: a review

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