Influencing factors on sorption of TNT and RDX using rice husk biochar

Lingamdinne, Lakshmi Prasanna; Roh, Hoon; Choi, Yongki; Koduru, Janardhan Reddy; Yang, Jae‐Kyu; Chang, Yoon-Young

doi:10.1016/j.jiec.2015.08.012

Cited by 52 publications

(26 citation statements)

References 50 publications

(54 reference statements)

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“…There was no significant increase in the removal of lead(II) ion after 60 min indicating that equilibrium condition has been reached. This shows that the remaining empty sites on the adsorbent has been occupied leading to repulsive forces between adsorbed lead(II) ion on the adsorbent and those in the aqueous phase [37]. …”

Section: Effect Of Adsorbent Dosagementioning

confidence: 96%

“…This is comparable to 1.88 m 2 /g reported by Mousavi et al [29] for waste rubber ash used for the removal of lead ions from aqueous solutions. The average pore diameter of DEP was within the range of 20 < d < 500 × 10 −8 cm and the adsorbent was classified as a mesoporous material [36,37]. Similarly, Rodrigues et al [38] and Zvinowanda et al [28] reported BET surface areas of 1.083 m 2 /g and 2.52 m 2 /g for activated carbon from macademia nuts used for phenol removal and maize tassels for heavy metal removal from polluted waters, respectively although adsorbents with higher surface areas have been widely reported in literature [15,[39][40][41].…”

Section: Morphology and Textural Examination Of The Adsorbentmentioning

confidence: 99%

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A Novel Approach for the Removal of Lead(II) Ion from Wastewater Using Mucilaginous Leaves of Diceriocaryum eriocarpum Plant

et al. 2015

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Lead(II) ion is a very toxic element known to cause detrimental effects to human health even at very low concentrations. An adsorbent prepared using mucilaginous leaves from Diceriocaryum eriocarpum plant (DEP) was used for the adsorption of lead(II) ion from aqueous solution. Batch experiments were performed on simulated aqueous solutions under optimized conditions of adsorbent dosage, contact time, pH and initial lead(II) ion concentration at 298 K. The Langmuir isotherm model more suitably described the adsorption process than the Freundlich model with linearized coefficients of 0.9661 and 0.9547, respectively. Pseudo-second order kinetic equation best described the kinetics of the reaction. Fourier transform infra-red analysis confirmed the presence of amino (-NH), carbonyl (-C=O) and hydroxyl (-OH) functional groups. Application of the prepared adsorbent to wastewater samples of 10 mg/L and 12 mg/L of lead(II) ion concentration taken from a waste stabilization pond showed removal efficiencies of 95.8% and 96.4%, respectively. Futhermore, 0.1 M HCl was a better desorbing agent than 0.1 M NaOH and de-ionized water. The experimental data obtained demonstrated that mucilaginous leaves from DEP can be used as a suitable adsorbent for lead(II) ion removal from wastewater.

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Section: Effect Of Adsorbent Dosagementioning

confidence: 96%

Section: Morphology and Textural Examination Of The Adsorbentmentioning

confidence: 99%

A Novel Approach for the Removal of Lead(II) Ion from Wastewater Using Mucilaginous Leaves of Diceriocaryum eriocarpum Plant

et al. 2015

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“…Simultaneously, several previous studies have shown that its physicochemical properties and pollutant retention ability can be affected by the source of material and productive process [10,11,12,13]. Besides, some present reports have observed the removal studies of Cd and explosive compounds by buffalo-weed biochar-alginate bead [14] and influential factors of sorption utilizing rice husk biochar [15].…”

Section: Introductionmentioning

confidence: 69%

“…As one kind of HOCs, PBDEs have been mainly adsorbed by soils and sediments [18], however, these natural adsorbents were limited to utilize due to their low removal efficiency of PBDEs. Biochars showed a high affinity and high sorption capacity for HOCs and heavy metals, therefore, it can be a cost-effective and eco-friendly adsorbent [14,15]. Due to different adsorption mechanisms could impact the re-emission and bioavailability of sorbed contaminants after biochar amendments, hence, the mechanisms involved are important for post-remediation risk assessment and management [18].…”

Section: Introductionmentioning

confidence: 99%

Role of Sorbent Surface Functionalities, Partition and Microporosity in 2, 2 ́, 4, 4 ́-Tetrabromodiphenyl Ether Sorption onto Biochars in a Single-Solute System

Yan¹,

Su²,

Ma³

et al. 2016

JRST

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a study was conducted to investigate the sorption behavior and mechanisms of 2, 2′, 4, 4′-tetrabromodiphenyl ether (BDe-47) onto a series of corn straw biochars pyrolysed at 300, 500 and 700°c (Bc300, Bc500 and Bc700). The micropore volume of Bc700 was 34 times higher than Bc300 and Bc500, which indicates that the biochar developed more high energy pore-filling adsorption sites and the carbonization was accelerated as pyrolytic temperatures increased,. The kinetics results showed that the fast sorption rate constants ranged from 4.01 h -1 to 6.62 h -1 while the slow sorption rate constants ranged from 0.18 h -1 to 0.40 h -1 . The fast sorption was attributed to the partitioning. The adsorption isotherm parameters indicate that the sorption mechanisms were different among the different biochars. For Bc300, partitioning was the main adsorption mechanism while for BC500, the pore-filling adsorption dominated the sorption progress at low concentration, while partitioning dominated at high concentration. The pore-filling adsorption dominated the entire sorption progress for BC700.

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“…[30,[40][41][42][43][44]. Having a microporous structure and high C content, biochar can be used in a range of applications [45].…”

Section: Characterization Of the Charmentioning

confidence: 99%

Adsorptive removal of atmospheric pollutants over Pyropia tenera chars

Lee¹,

Park²,

Lee³

et al. 2016

Carbon letters

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As a replacement for activated carbon, biochar was synthesized and used for the adsorptive removal of formaldehyde and nitrogen oxide. Biochar was produced from the fast pyrolysis of the red marine macro alga, Pyropia tenera. The P. tenera char was then activated with steam, ammonia and KOH to alter its characteristics. The adsorption of formaldehyde, which is one of the main indoor air pollutants, onto the seaweed char was performed using 1-ppm formaldehyde and the char was activated using a range of methods. The char activated with both the KOH and ammonia treatments showed the highest adsorptive removal efficiency, followed by KOH-treated char, ammonia-treated char, steam-treated char, and non-activated char. The removal of 1000-ppm NO over untreated char, KOH-treated char, and activated carbon was also tested. While the untreated char exhibited little activity, the KOH-treated char removed 80% of the NO at 50°C, which was an even higher NO removal efficiency than that achieved by activated carbon.

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Influencing factors on sorption of TNT and RDX using rice husk biochar

Cited by 52 publications

References 50 publications

A Novel Approach for the Removal of Lead(II) Ion from Wastewater Using Mucilaginous Leaves of Diceriocaryum eriocarpum Plant

A Novel Approach for the Removal of Lead(II) Ion from Wastewater Using Mucilaginous Leaves of Diceriocaryum eriocarpum Plant

Role of Sorbent Surface Functionalities, Partition and Microporosity in 2, 2 ́, 4, 4 ́-Tetrabromodiphenyl Ether Sorption onto Biochars in a Single-Solute System

Adsorptive removal of atmospheric pollutants over Pyropia tenera chars

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