Impacts of temperatures and phosphoric-acid modification to the physicochemical properties of biochar for excellent sulfadiazine adsorption

Zeng, Xue-Yu; Wang, Yu; Li, Rong-Xin; Cao, Hai–Lei; Li, Yafeng; Lü, Jian

doi:10.1007/s42773-022-00143-4

Cited by 85 publications

(19 citation statements)

References 90 publications

(86 reference statements)

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“…Compared with previous studies [ 31 , 32 ], the adsorption amounts of SMX and TMP by the biochar in this study were greater, which may be related to the longer pyrolysis time and the removal of ash by hydrochloric acid soaking during the preparation of biochar [ 33 ]. The adsorption quantity of TMP by the same biochar was more than SMX.…”

Section: Resultscontrasting

confidence: 75%

“…and that the specific surface area increased at higher pyrolysis temperatures [28]. In a tion, the value of n decreased as the pyrolysis temperature increased, and the nonlinea of adsorption isotherms gradually increased, indicating that more inhomogeneous "v ous", "hard carbon", or highly concentrated adsorption potentials were formed on surface of biochar, and the adsorption energy was higher for these adsorption sites [29 Compared with previous studies [31,32], the adsorption amounts of SMX and TMP by the biochar in this study were greater, which may be related to the longer pyrolysis time and the removal of ash by hydrochloric acid soaking during the preparation of biochar [33]. The adsorption quantity of TMP by the same biochar was more than SMX.…”

Section: Adsorption Isotherm By Biocharsmentioning

confidence: 61%

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Typical Sulfonamide Antibiotics Removal by Biochar-Amended River Coarse Sand during Groundwater Recharge

Yu²,

Hou

et al. 2022

IJERPH

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The high porosity of medium-coarse sand (MCS) layers in groundwater recharge areas presents a high environmental risk. Sulfamethoxazole (SMX) and trimethoprim (TMP) are two common sulfonamide antibiotics in surface water that have a high propensity to migrate into groundwater. In this study, four biochars were prepared and biochar-amended soil aquifer treatment (SAT) columns were constructed to remove SMX and TMP. Batch experiments demonstrated that the sorption isotherms conformed to the Freundlich model. The maximum adsorptions of biochars prepared at 700 °C were 54.73 and 67.62 mg/g for SMX and 59.3 and 73.38 mg/g for TMP. Electrostatic interaction may be one of the primary mechanisms of adsorption. The column experiments showed that the SMX and TMP removal rate of the biochar-amended SAT was as high as 96%, while that of the MCS SAT was less than 5%. The addition of biochar greatly improved the retention capacity of the pollutants in the MCS layer in the groundwater recharge area and effectively reduced environmental risk.

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Section: Resultscontrasting

confidence: 75%

Section: Adsorption Isotherm By Biocharsmentioning

confidence: 61%

Typical Sulfonamide Antibiotics Removal by Biochar-Amended River Coarse Sand during Groundwater Recharge

Yu²,

Hou

et al. 2022

IJERPH

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“…The peaks observed at 2θ = 14.8, 16.6, and 22.7°for all the HCs corresponded to the (110), (002), and (120) facets, respectively, which reflected the crystalline structure and amorphous carbon. 36 Obviously, the intensity of the peak at 2θ = 22.7°for HCs decreased with the increasing pyrolysis temperature, which indicated that a typical disordered, graphited structure was formed. 37,38 Additionally, the weak peak at 26.7°indicated the presence of a small amount of SiO 2 in HCs.…”

Section: ■ Results and Discussionmentioning

confidence: 93%

Hydrogen Peroxide/Phosphoric Acid Modification of Hydrochars for Sulfamethoxazole and Carbamazepine Adsorption: The Role of Oxygen-Containing Functional Groups

Niu

Gao

et al. 2023

Langmuir

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Emerging pollutants, such as sulfonamide antibiotics and pharmaceuticals, have been widely detected in water and soils, posing serious environmental and human health concerns. Thus, it is urgent and necessary to develop a technology for removing them. In this work, a hydrothermal carbonization method was used to prepare the hydrochars (HCs) by pine sawdust with different temperatures. To improve the physicochemical properties of HCs, phosphoric acid (H 3 PO 4 ) and hydrogen peroxide (H 2 O 2 ) were used to modify these HCs, and they were referred to as PHCs and HHCs, respectively. The adsorption of sulfamethoxazole (SMX) and carbamazepine (CBZ) by pristine and modified HCs was investigated systematically. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) results indicated that the H 2 O 2 /H 3 PO 4 modification led to the formation of a disordered carbon structure and abundant pores. X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FTIR) spectroscopy results suggested that carboxyl (-COOH) and hydroxyl (-OH) functional groups of HCs increased after modification, which is the main reason for the higher sorption of SMX and CBZ on H 3 PO 4 /H 2 O 2 -modified HCs when compared with pristine HCs. In addition, the positive correlation between −COOH/C=O and logK d of these two chemicals also suggested that oxygen-containing functional groups played a crucial role in the sorption of SMX and CBZ. The strong hydrophobic interaction and π−π interaction between CBZ and pristine/modified HCs resulted in its higher adsorption when compared with SMX. The results of this study provide a novel perspective on the investigation of adsorption mechanisms and environmental behaviors for organic contaminants by pristine and modified HCs.

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“…In literature, the adsorption mass transfer kinetics includes external diffusion, internal diffusion and adsorption in the active adsorbent sites (Chen et al 2022, Zeng et al 2022. In pseudo-first-order kinetic fitting, the R 2 were 0.969 and 0.972 for fitting the adsorption process of PD-800 and FPD-800, reflecting good linear fit.…”

Section: Adsorption Kinetics Study Of Pd and Fpdmentioning

confidence: 86%

Pyrolysis characteristics, kinetics, and biochar of fermented pine sawdust–based waste

Zhang

Cheng

et al. 2023

Environ Sci Pollut Res

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Pyrolysis characteristics, kinetics and modified biochar derived from pine sawdust after fermentation (FPD) were determined by Fourier Transform Infrared (FTIR), Thermogravimetric analysis (TG) and Scanning Electron Microscopy (SEM), and comparison was established with pine sawdust (PD). The pretreatment i.e. fermentation changed the properties of raw materials and improved the pyrolysis properties.The variation range of CPI values of FPD was 6.51×10 -7 -16.38×10 -7 % 2 •min -2 •°C -3 , significantly higher than that of untreated samples determined under the same experimental conditions. The average activation energy of FPD was 367.95 kJ/mol attained by Flynn-Wall-Ozawa (FWO) method, 389.45 kJ/mol by Kissinger-Akahira-Sonuse (KAS) and 346.55 kJ/mol attained by Starink method much higher than PD. Additionally, fermentation could enhance the adsorption capacity for methylene blue of biochar from 0.76 mg/g to 1.6mg/g due to the abundant surface functional groups and three-dimensional internal pore structure.The adsorption pattern of fermented pine wood shifted from chemisorption dominated to the synergetic adsorption of surface functional groups adsorption and intragranular filling. Pyrolysis kinetics and biochar determination provide an in-depth understanding of fermented pine sawdust pyrolysis behaviors and product characteristics, which is the basis for designing pyrolysis process and re-using fermentation residues.

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Impacts of temperatures and phosphoric-acid modification to the physicochemical properties of biochar for excellent sulfadiazine adsorption

Cited by 85 publications

References 90 publications

Typical Sulfonamide Antibiotics Removal by Biochar-Amended River Coarse Sand during Groundwater Recharge

Typical Sulfonamide Antibiotics Removal by Biochar-Amended River Coarse Sand during Groundwater Recharge

Hydrogen Peroxide/Phosphoric Acid Modification of Hydrochars for Sulfamethoxazole and Carbamazepine Adsorption: The Role of Oxygen-Containing Functional Groups

Pyrolysis characteristics, kinetics, and biochar of fermented pine sawdust–based waste

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