Adsorption Characteristics of Ammonium Nitrogen by Biochar from Diverse Origins in Water

Liu, Ning; Sun, Zhen Tao; Wu, Zheng Chao; Zhan, Xiu Mei; Zhang, Kai; Zhao, En Feng; Han, Xiao Ri

doi:10.4028/www.scientific.net/amr.664.305

Cited by 24 publications

(10 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…EFBBC favorably eliminated NH 4 1 within a pH range of 6.0-10.0. Similar results were also observed for NH 4 1 removal by biochar [10]. At alkaline pH, the decrease in NH 4 1 elimination beyond pH10 is explained by the fact that NH 4 1 is partially transformed into electrically neutral NH 4 OH (NH 3 ÁH 2 O), which would decrease the isolation of NH 4 1 , and the volatilization of NH 3 leads to the loss of ammonia nitrogen.…”

Section: Effect Of Ph Adsorbent Dosage and Particle Size Onsupporting

confidence: 77%

Adsorption of ammonium from aqueous solutions on environmentally friendly barbecue bamboo charcoal: Characteristics and kinetic and thermodynamic studies

Zhou

Yuan

2014

Env Prog and Sustain Energy

View full text Add to dashboard Cite

Environmentally friendly barbecue bamboo charcoal (EFBBC), an inexpensive biosorbent, was successfully used to remove ammonium (NH4+) from aqueous solutions. The effects of contact time, pH, initial concentration, average particle size, biosorbent dosage, and temperature on NH4+ removal were investigated. Biosorption conditions were as follows: contact time, 80 min; pH, 6.0–10; initial concentration, 60 mg/L; optimum particle size, 0.075–0.180 mm; biosorbent dosage, 4.0 g/L; temperature, 30°C. To investigate adsorption mechanisms, pseudo‐first‐order, pseudo‐second‐order, Elovich, and intraparticle diffusion models were fit to experimental results. Results indicated that kinetic data for NH4+ adsorption were better described by the pseudo‐second‐order model. Also, the Langmuir, Freundlich, and Temkin models were employed to analyze equilibrium data. Results indicated that the Freundlich isotherm best represented the data for NH4+ adsorption. Changes in the standard free energy, enthalpy, and entropy were also evaluated: the reaction was spontaneous and endothermic. The EFBBC surface was analyzed by X‐ray diffraction, scanning electron microscopy, X‐ray energy dispersive spectrometry, and Fourier transform infrared spectrometry. From the results, it was proposed that the adsorption behavior of NH4+ on the EFBBC surface depends on the internal structure and chemical composition, and the results highlight the need to understand specific surface characteristics. © 2014 American Institute of Chemical Engineers Environ Prog, 34: 655–662, 2015

show abstract

Section: Effect Of Ph Adsorbent Dosage and Particle Size Onsupporting

confidence: 77%

Adsorption of ammonium from aqueous solutions on environmentally friendly barbecue bamboo charcoal: Characteristics and kinetic and thermodynamic studies

Zhou

Yuan

2014

Env Prog and Sustain Energy

View full text Add to dashboard Cite

show abstract

“…On the other hand, although the r values from the Freundlich model were over 0.98 suggesting some level of physical adsorption, the values of 1/n <1, implied chemisorption was more favorable (Kizito et al 2015). Similar BC adsorption studies have reported that NH4 + adsorption fit both the Langmuir and Freundlich models (Liu et al 2013). From our results, the positive standard enthalpy change (ΔH°>0) indicated that pymetrozine adsorption process was endothermic.…”

Section: Discussionsupporting

confidence: 69%

Removal of the Pesticide Pymetrozine from Aqueous Solution by Biochar Produced from Brewer's Spent Grain at Different Pyrolytic Temperatures

Xi¹,

Yan²,

Quan³

et al. 2014

BioResources

View full text Add to dashboard Cite

Biochar (BC) produced from brewer's spent grain (BSG) via slow pyrolysis at 300, 400, 500, 600, and 700 °C was characterized and investigated as an adsorbent for the removal of the pesticide pymetrozine from aqueous solution. Batch BSG BCs adsorption experiments were carried out under various conditions (such as pH, pymetrozine concentration, and BC dosage) to adsorb the pymetrozine. The BSG BCs adsorption pymetrozine capacities were increased by 21.4% to 55.5% under pyrolysis temperatures of 300, 400, 500, and 600 °C compared to 700 °C with a pyrolysis time of 2 h and by 19.0% to 52.1% at 4 h. At solution pH values of 2, 4, 6, and 8, the adsorption capacities were increased by 9.6% to 39.5% compared with that at pH 10. A similar adsorption tendency was found for the different BCs dosage. In the first 60 min, BC absorbed 70% to 80% pymetrozine. The Langmuir and Freundlich model were highly correlated with BC adsorption. The magnitude of free energy decreased by 32.2% to 47.3% with increasing temperature. The value of the enthalpy change showed the adsorption to be endothermic. The BSG BC had high efficiency in adsorbing pymetrozine and had great potential to prevent the water pollution and reuse the waste of the beer factory.

show abstract

“…Ma and other scholars have found that the Freundlich equation (R 2 =0.9762) is suitable for describing the behavior of the ammonia nitrogen adsorption of biochar, and the main form is the heterogeneous adsorption of the multi molecular layer [16,24,31,32,33] .…”

Section: Freundlich Adsorptionmentioning

confidence: 99%

“…The source of biochar with the adsorption effect to ammonia nitrogen is rich [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33] . Furthermore, the different adsorption properties are demonstrated, as the biochars are made of different biomass materials [14,15] .…”

Section: The Research Progress In Adsorption Of Nitrate Nitrogen Usinmentioning

confidence: 99%

The Review on Adsorption and Removing Ammonia Nitrogen with Biochar on its Mechanism

Liang

Huang

et al. 2016

MATEC Web Conf.

View full text Add to dashboard Cite

.The study on decreasing ammonia-nitrogen has received great attention in recent years. This paper summarizes the adsorption mechanism and the influencing factors. Thus, the feasibility of adsorption using biochar has been indicated. A few issues were proposed for the further study: the industrial application research on treatment, modification method for improving the efficiency of adsorption, desorption and regeneration of biochar ,model of adsorption mechanism, the physical and chemical properties of soil .

show abstract

Adsorption Characteristics of Ammonium Nitrogen by Biochar from Diverse Origins in Water

Cited by 24 publications

References 10 publications

Adsorption of ammonium from aqueous solutions on environmentally friendly barbecue bamboo charcoal: Characteristics and kinetic and thermodynamic studies

Adsorption of ammonium from aqueous solutions on environmentally friendly barbecue bamboo charcoal: Characteristics and kinetic and thermodynamic studies

Removal of the Pesticide Pymetrozine from Aqueous Solution by Biochar Produced from Brewer's Spent Grain at Different Pyrolytic Temperatures

The Review on Adsorption and Removing Ammonia Nitrogen with Biochar on its Mechanism

Contact Info

Product

Resources

About