Characteristics of nitrogen and phosphorus adsorption by Mg-loaded biochar from different feedstocks

Jiang, Yanhong; Li, Anyu; Deng, Hua; Ye, Chenghui; Wu, Yuqing; Linmu, Yu-Dan; Hang, Hao-Lin

doi:10.1016/j.biortech.2018.12.079

Cited by 209 publications

(65 citation statements)

References 37 publications

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“…The FTIR results before and after treatment with the Cr(VI) solutions for the six biochars are provided in Figure 2. All biochars showed similar trends in the spectrograms and had similar functional groups [16]: -OH (3429, 3430, 3427, 3431, and 3417 cm −1 ), -(OH) 2 -substituted aromatic rings or anthraquinones (1623, 1641, 1651, 1621, 1622, and 1630 cm −1 ), phenolic hydroxyl (1055, 1060, 1047, 1048, 1088, and 1039 cm −1 ), and phenols (610, 631, 622, 612, 614, and 608 cm −1 ). These groups are responsible for the binding of hexavalent chromium onto the six biochars, such as CSB [25].…”

Section: Experiments Testing Regeneration Performancementioning

confidence: 85%

“…The adsorption mechanism was analyzed using pseudo-first-order equations, pseudo-second-order equations and the intraparticle diffusion model. The equations for the models are as follows [13,16]:…”

Section: Adsorption Kinetics Studymentioning

confidence: 99%

“…Biochar is produced via oxygen-limited pyrolysis from different biomass materials [14] that present carbon contents (achieved by controlling the pyrolysis temperature) as high as 51.60-85.02% [15] and are rich in acid-base groups, such as carboxyl (-COOH) and phenolic hydroxyl (-OH) groups [16]. Biochar is a new type of adsorbent with excellent adsorption properties for nutrient elements (ammonia nitrogen, phosphorus), organic dyes (Congo red, malachite green, etc.…”

Section: Introductionmentioning

confidence: 99%

“…), and heavy metals (Cd, Cr, Cu, Pb, etc.) [16]. Therefore, researchers at home and abroad have studied the adsorption performance and mechanisms of biochar.…”

Section: Introductionmentioning

confidence: 99%

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High-Efficiency Removal of Cr(VI) from Wastewater by Mg-Loaded Biochars: Adsorption Process and Removal Mechanism

Deng

Jiang

et al. 2020

Materials

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Biochars were produced with magnesium chloride as an additive for the sorption of hexavalent chromium dissolved in water using five types of straw (from taro, corn, cassava, Chinese fir, and banana) and one type of shell (Camellia oleifera) as the raw materials. The removal of hexavalent chromium by the six biochars mainly occurred within 60 min and then gradually stabilized. The kinetics of the adsorption process were second order, the Langmuir model was followed, and the adsorption of Cr(VI) by the six biochars was characterized by Langmuir monolayer chemisorption on a heterogeneous surface. Banana straw biochar (BSB) had the best performance, which perhaps benefitted from its special structure and best adsorption effect on Cr(VI), and the theoretical adsorption capacity was calculated as 125.00 mg/g. For the mechanism analysis, Mg-loaded biochars were characterized before and after adsorption by Fourier transform infrared spectroscopy (FTIR), X-ray diffractometry (XRD), and scanning electron microscopy/energy dispersive spectroscopy (SEM-EDS). The adsorption mechanism differed from the adsorption process of conventional magnetic biochar, and biochar interactions with Cr(VI) were controlled mainly by electrostatic attraction, complexation, and functional group bonding. In summary, the six Mg-loaded biochars exhibit great potential advantages in removing Cr(VI) from wastewater and have promising potential for practical use, especially BSB, which shows super-high adsorption performance.

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Section: Experiments Testing Regeneration Performancementioning

confidence: 85%

Section: Adsorption Kinetics Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…), and heavy metals (Cd, Cr, Cu, Pb, etc.) [16]. Therefore, researchers at home and abroad have studied the adsorption performance and mechanisms of biochar.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

High-Efficiency Removal of Cr(VI) from Wastewater by Mg-Loaded Biochars: Adsorption Process and Removal Mechanism

Deng

Jiang

et al. 2020

Materials

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“…Fortunately, the adsorption of NO 3 − by biochar is the most effective method to remove nitrogen because of high efficiency, simple equipment, and reliable operation [27]. Indeed, NO 3 − was selected as the object for adsorption application, which has always been a research hotspot [28]. Li et al [25] found that biochar has limited adsorption of NO 3 − from switchgrass and water oak at variable pyrolysis condition.…”

Section: Introductionmentioning

confidence: 99%

The Eco-Friendly Biochar and Valuable Bio-Oil from Caragana korshinskii: Pyrolysis Preparation, Characterization, and Adsorption Applications

et al. 2020

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Carbonization of biomass can prepare carbon materials with excellent properties. In order to explore the comprehensive utilization and recycling of Caragana korshinskii biomass, 15 kinds of Caragana korshinskii biochar (CB) were prepared by controlling the oxygen-limited pyrolysis process. Moreover, we pay attention to the dynamic changes of microstructure of CB and the by-products. The physicochemical properties of CB were characterized by Scanning Electron Microscope (SEM), BET-specific surface area (BET-SSA), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), Fourier Transform Infrared (FTIR), and Gas chromatography-mass spectrometry (GC-MS). The optimal preparation technology was evaluated by batch adsorption application experiment of NO3−, and the pyrolysis mechanism was explored. The results showed that the pyrolysis temperature is the most important factor in the properties of CB. With the increase of temperature, the content of C, pH, mesoporous structure, BET-SSA of CB increased, the cation exchange capacity (CEC) decreased and then increased, but the yield and the content of O and N decreased. The CEC, pH, and BET-SSA of CB under each pyrolysis process were 16.64–81.4 cmol·kg−1, 6.65–8.99, and 13.52–133.49 m2·g−1, respectively. CB contains abundant functional groups and mesoporous structure. As the pyrolysis temperature and time increases, the bond valence structure of C 1s, Ca 2p, and O 1s is more stable, and the phase structure of CaCO3 is more obvious, where the aromaticity increases, and the polarity decreases. The CB prepared at 650 °C for 3 h presented the best adsorption performance, and the maximum theoretical adsorption capacity for NO3− reached 120.65 mg·g−1. The Langmuir model and pseudo-second-order model can well describe the isothermal and kinetics adsorption process of NO3−, respectively. Compared with other cellulose and lignin-based biomass materials, CB showed efficient adsorption performance of NO3− without complicated modification condition. The by-products contain bio-soil and tail gas, which are potential source of liquid fuel and chemical raw materials. Especially, the bio-oil of CB contains α-d-glucopyranose, which can be used in medical tests and medicines.

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Biochar for Wastewater Treatment

Kwarciak‐Kozłowska

Włodarczyk

2021

Handbook of Assisted and Amendment: Enhanced Sustainable Remediation Technology

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Characteristics of nitrogen and phosphorus adsorption by Mg-loaded biochar from different feedstocks

Cited by 209 publications

References 37 publications

High-Efficiency Removal of Cr(VI) from Wastewater by Mg-Loaded Biochars: Adsorption Process and Removal Mechanism

High-Efficiency Removal of Cr(VI) from Wastewater by Mg-Loaded Biochars: Adsorption Process and Removal Mechanism

The Eco-Friendly Biochar and Valuable Bio-Oil from Caragana korshinskii: Pyrolysis Preparation, Characterization, and Adsorption Applications

Biochar for Wastewater Treatment

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