Potential of rice husks for antimony removal

Khalid, Nasir; Ahmad, Shujaat; Toheed, Aqidat; Ahmed, Jamil

doi:10.1016/s0969-8043(99)00115-3

Cited by 101 publications

(69 citation statements)

References 25 publications

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“…The pH of the solution is considered to be one of the most important parameters in adsorption processes, a ecting the surface charge of the adsorbent as well as the degree of ionization and speciation of the adsorbate [24,25]. In order to evaluate the e ect of pH on the adsorption of phenol on nano bioadsorbents, the adsorption experiments were carried out with 8 mgL 1 phenol concentration, 0.08 gL 1 nano-bioadsorbent dose, and 40 min contact timeat 35 C at di erent initial pH values in the range of 3-11 ( Figure 2).…”

Section: E Ect Of Phmentioning

confidence: 99%

Phenol Removal from Aqueous Solution by Adsorption Process: Study of The Nanoparticles Performance Prepared from Alo vera and Mesquite (Prosopis) Leaves

et al. 2017

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Abstract. This study was performed to measure the potential utilization of agro-waste to generate nanoparticles and evaluate its capability as a low-cost adsorbent for phenol removal. Adsorption studies for phenol removal using aloe vera and mesquite leaves nanoparticles were carried out under various experimental conditions including pH, nanobioadsorbent dosage, phenol concentration, contact time, temperature, and ionic strength in a batch reactor. The adsorption kinetics were applied by pseudo-rst order and pseudosecond order models and isotherm technique by Freundlich and Langmuir isotherms models. The results showed that the rate of phenol adsorption increases in both nano-bioadsorbents with an increase in pH up to 7, adsorbent dosage up to 0.08 gL 1 , phenol initial concentration up to 32 mgL 1 , contact time up to 60 min, and a raise in temperature. The adsorption data followed the Freundlich isotherm model. The kinetic studies indicated that the adsorption of phenol with nano-bioadsorbents was best described by the pseudo-second order kinetics. We found that the nanoparticles prepared from aloe vera and mesquite leaves had a high capability in adsorption of phenol, besides the point that they could be accessed at low cost. These agro-wastes can be used to remove phenol from aqueous environments.

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Section: E Ect Of Phmentioning

confidence: 99%

Phenol Removal from Aqueous Solution by Adsorption Process: Study of The Nanoparticles Performance Prepared from Alo vera and Mesquite (Prosopis) Leaves

et al. 2017

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“…The utilization of this source of biomass would solve some disposal problem as well as access to cheaper materials for adsorption in water pollutants control system [25]. Since the main components of rice husk are carbon and silica (15-22% SiO 2 in hydrated amorphous form like silica gel), it has the potential to be used as an adsorbent [26]. When rice husk is burnt, about 20 wt% of the husk remains as ash.…”

Section: Bio-waste Materials As Adsorbent Of Contaminate From Waste Wmentioning

confidence: 99%

Applications of Bio-waste Materials as Green Synthesis of Nanoparticles and Water Purification

Ali¹

2017

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Towards the future of green, sustainable and renewable products the suggestion of using the agriculture biomass in the coming decades got increased. Biomass material is one of the important sources of alternative material for the production of biocomposite products. An increasing global awareness about environmental issues is acting as the driving force behind the utilization of biomass material as valuable products. Bio-waste materials (agricultural waste) have been recognized as an ecological burden for the society they stimulated new gateways for the production of renewable, low cost and sustainable adsorbents for water treatment applications. In the area of water purification, nanotechnology offers the possibility of an efficient removal of pollutants and bacteria. Adsorption has proved that it is the best process of water treatment technologies, because of its significant advantages. Different modification methods of waste-based adsorbents, have also been presented to highlight and discuss the key advancements on the preparation of novel adsorbents using agricultural "agro-waste". Adsorption mechanisms responsible for pollutants removal by waste-based adsorbents have also been discussed. It also focuses on the computational aspects of binding of biomolecules to nanoparticles (NPs) and some of the applications of the biosynthesized NPs as water purification. The nature acts like a large ''bio-laboratory" comprising of plants, algae, fungi, yeast, etc. which are composed of biomolecules. These naturally occurring biomolecules have been identified to play an active role in the formation of nanoparticles with distinct shapes and sizes thereby acting as a driving force for the designing of greener, safe and environmentally benign protocols for the synthesis of NPs. The biosynthesis of NPs using waste materials will help researchers not only to design safer nanomaterials but also to promote the understanding of health and safety considerations of NPs. Useful materials can be produced easily even at reasonable scale because the biomaterial based routes eliminate the need to use toxic chemicals. The aim of this review is to summarize the adsorption capacities for organic and inorganic pollutants by different bio-waste-based adsorbents.

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“…The pH of the solution is considered to be one of the most important parameters in adsorption processes, which affects the surface charge of the adsorbent as well as the degree of ionization and speciation of the adsorbate [24,25]. In order to evaluate the effect of pH on the adsorption of phenol on nano-bioadsorbents, the adsorption experiments were carried out with 8 mgL −1 phenol concentration, 0.08 g L −1 nano-bioadsorbent dose and 40 min contact timeat 35°C at different initial pH values in the range of 3-11 ( Fig.…”

Section: Effect Of Phmentioning

confidence: 99%

Phenol Removal from Aqueous Solution by Adsorption Process: Study of The Nanoparticles Performance Prepared from Alo vera and Mesquite (Prosopis) Leaves

et al. 2017

View full text Add to dashboard Cite

This study was performed to measure the potential utilization of agro-waste to generate nanoparticles and evaluate the capability of it's as a low cost adsorbent for removal of phenol. Adsorption studies for phenol removal by using Aloe vera and Mesquite leaves nanoparticles carried out under various experimental conditions including pH, nanobioadsorbent dosage, phenol concentration, contact time, temperature and ionic strength in a batch reactor. The adsorption kinetics by pseudo-first order and pseudo-second order models and isotherm technique by Freundlich and Langmuir isotherms models were applied. The results showed that the rate of phenol adsorption increases in both nano-bioadsorbents with an increase of pH up to 7, adsorbent dosage up to 0.08 gL -1 , phenol initial concentration up to 32 mgL -1 , contact time up to 60 min and raising in temperature. The adsorption data followed the Freundlich isotherm model. The kinetic studies indicated that the adsorption of phenol with nano-bioadsorbents was best described by the pseudo second order kinetics. We found that the nanoparticles prepared from Aloe vera and Mesquite leaves had a high capability in adsorption of phenol, beside the point that they could be accessed at a low cost. These agrowastes can be used to remove phenol from aqueous environments.

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Potential of rice husks for antimony removal

Cited by 101 publications

References 25 publications

Phenol Removal from Aqueous Solution by Adsorption Process: Study of The Nanoparticles Performance Prepared from Alo vera and Mesquite (Prosopis) Leaves

Phenol Removal from Aqueous Solution by Adsorption Process: Study of The Nanoparticles Performance Prepared from Alo vera and Mesquite (Prosopis) Leaves

Applications of Bio-waste Materials as Green Synthesis of Nanoparticles and Water Purification

Phenol Removal from Aqueous Solution by Adsorption Process: Study of The Nanoparticles Performance Prepared from Alo vera and Mesquite (Prosopis) Leaves

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