Effects of pyrolysis temperature on nitrate-nitrogen (NO3−-N) and bromate (BrO3−) adsorption onto date palm biochar

Alsewaileh, Abdulaziz S.; Usman, Adel R.A.; Al-Wabel, Mohammad I.

doi:10.1016/j.jenvman.2019.02.045

Cited by 41 publications

(18 citation statements)

References 31 publications

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“…Finally, the weight loss stage of biochar occurs at temperatures >800 °C. Some studies reported the crystallization of mineral components and the formation of highly aromatic structures of organic matter in biochar at high temperatures >700 °C [ 11 , 21 , 29 ], and also the formation of graphite microcrystalline structures with irregular arrangement. If further processed at high temperature, a stable macromolecular fused ring aromatic structure can be formed, which is beneficial to the development of graphitization.…”

Section: Resultsmentioning

confidence: 99%

“…Currently, the application of adsorption is a key research hotspot [ 28 ]. Alsewaileh et al [ 29 ] reported that the biochar derived from date palm afforded a low NO 3 − adsorption with an adsorption capacity of 0.12–8.37 mg·g −1 at different initial pH values, addition dosages, and pyrolysis temperatures. Cui et al [ 30 ] studied the adsorption of NH 4 + on six types of biochar prepared from wetland plants and found that the maximum adsorption capacity ranged from 2.12 mg·g −1 ( V. zizanioides biochar) to 13.35 mg·g −1 ( C. indica biochar).…”

Section: Introductionmentioning

confidence: 99%

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Utilization of Jujube Biomass to Prepare Biochar by Pyrolysis and Activation: Characterization, Adsorption Characteristics, and Mechanisms for Nitrogen

et al. 2020

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The rapid advancement of jujube industry has produced a large amount of jujube biomass waste, requiring the development of new methods for utilization of jujube resources. Herein, medium-temperature pyrolysis is employed to produce carbon materials from jujube waste in an oxygen-free environment. Ten types of jujube biochar (JB) are prepared by modifying different pyrolysis parameters, followed by physical activation. The physicochemical properties of JB are systematically characterized, and the adsorption characteristics of JB for NO3− and NH4+ are evaluated via batch adsorption experiments. Furthermore, the pyrolysis and adsorption mechanisms are discussed. The results indicate that the C content, pH, and specific surface area of JB increase with an increase in the pyrolysis temperature from 300 °C to 700 °C, whereas the O and N contents, yield, zeta potential, and total functional groups of JB decrease gradually. The pyrolysis temperature more significantly effects the biochar properties than pyrolysis time. JB affords the highest adsorption capacity for NO3− (21.17 mg·g−1) and NH4+ (30.57 mg·g−1) at 600 °C in 2 h. The Langmuir and pseudo-second-order models suitably describe the isothermal and kinetic adsorption processes, respectively. The NO3− and NH4+ adsorption mechanisms of JB may include surface adsorption, intraparticle diffusion, electrostatic interaction, and ion exchange. In addition, π–π interaction and surface complexation may also be involved in NH4+ adsorption. The pyrolysis mechanism comprises the combination of hemicellulose, cellulose, and lignin decomposition involving three stages. This study is expected to provide a theoretical and practical basis for the efficient utilization of jujube biomass to develop eco-friendly biochar and nitrogenous wastewater pollution prevention.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Utilization of Jujube Biomass to Prepare Biochar by Pyrolysis and Activation: Characterization, Adsorption Characteristics, and Mechanisms for Nitrogen

et al. 2020

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“…As a result, a good fit of the experimental data to the Langmuir model indicated a monolayer nitrate adsorption on a homogeneous surface of SMCB/Fe modified biochar. Other researchers have also reported that Langmuir fitting is useful for nitrate adsorption onto various adsorbents [34,37,43,[49][50][51][52][53]. According to the Langmuir isotherm model, the maximum adsorption capacity was calculated to be 19.88 mg g −1 .…”

Section: Adsorption Isotherm Studymentioning

confidence: 99%

Application of Modified Spent Mushroom Compost Biochar (SMCB/Fe) for Nitrate Removal from Aqueous Solution

Darajeh

Alizadeh

Leung

et al. 2021

Toxics

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The public is already aware that nitrate pollution caused by nutrient runoff from farms is harmful to aquatic life and human health, and there is an urgent need for a product/technology to solve this problem. A biochar adsorbent was synthesized and used to remove nitrate ions from aqueous media based on spent mushroom compost (SMC), pre-treated with iron (III) chloride hexahydrate and pyrolyzed at 600 °C. The surface properties and morphology of SMCB/Fe were investigated using Fourier transform-infrared spectroscopy (FT-IR), X-ray diffraction (XRD), and scanning electron microscopy (SEM). The effect of main parameters such as the adsorbent dosages, pH of the solutions, contact times, and ion concentrations on the efficiency of nitrate removal was investigated. The validity of the experimental method was examined by the isothermal adsorption and kinetic adsorption models. The nitrate sorption kinetics were found to follow the pseudo-second-order model, with a higher determination coefficient (0.99) than the pseudo-first-order (0.86). The results showed that the maximum percentage of nitrate adsorption was achieved at equilibrium pH 5–7, after 120 min of contact time, and with an adsorbent dose of 2 g L−1. The highest nitrate adsorption capacity of the modified adsorbent was 19.88 mg g−1.

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“…However, NO 3 − -N could not be bound by untreated BC primarily because of the lower peaks of basic functional groups. Alsewaileh et al [83] found that low-temperature BC (300 • C) exhibited minimal adsorption efficiency of NO 3 − -N because of the reduced total basicity (surface basic functional groups) and limited surface area.…”

Section: Effect Of Conditioner Treatments On N Concentration In Digestatementioning

confidence: 99%

The Effect of Untreated and Acidified Biochar on NH3-N Emissions from Slurry Digestate

et al. 2021

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The development of new options to reduce ammonia (NH3) emissions during slurry manure storage is still required due to the shortcomings of the current technologies. This study aimed to identify to what extent untreated and acid-treated biochar (BC) and pure acids could reduce ammonia nitrogen (NH3-N) volatilization and increase nitrogen retention in slurry digestate. The NH3-N emissions were effectively reduced by H2SO4 and H3PO4 acids, untreated BC when applied mixed into the digestate and acidified BC treatments applied on the surface of the digestate. Acidification increased the specific surface area and number of O-containing surface functional groups of the BC and decreased the pH, alkalinity and the hydrophobic property. Compared to untreated BC, the ability of BC to reduce NH3-N emissions was greater when it was acidified with H2SO4 and applied to the digestate surface. The effect on digestate pH of acidified BC when applied mixed into the digestate was not different, except for H2O2, from that of the addition of the respective pure acid to digestate. The total N concentration in digestate was not significantly correlated with NH3-N emissions. These findings indicate that acidified BC could be an effective conditioner to reduce NH3-N emissions from slurry digestate storage.

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Effects of pyrolysis temperature on nitrate-nitrogen (NO3−-N) and bromate (BrO3−) adsorption onto date palm biochar

Cited by 41 publications

References 31 publications

Utilization of Jujube Biomass to Prepare Biochar by Pyrolysis and Activation: Characterization, Adsorption Characteristics, and Mechanisms for Nitrogen

Utilization of Jujube Biomass to Prepare Biochar by Pyrolysis and Activation: Characterization, Adsorption Characteristics, and Mechanisms for Nitrogen

Application of Modified Spent Mushroom Compost Biochar (SMCB/Fe) for Nitrate Removal from Aqueous Solution

The Effect of Untreated and Acidified Biochar on NH3-N Emissions from Slurry Digestate

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