Removal of tetracycline from an aqueous solution using manganese dioxide modified biochar derived from Chinese herbal medicine residues

Shen, Qibin; Wang, Zhaoyue; Yu, Qiao; Yang, Cheng; Liu, Zidan; Zhang, Taiping; Zhou, Shaoqi

doi:10.1016/j.envres.2020.109195

Cited by 168 publications

(39 citation statements)

References 63 publications

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“…The oxygen and hydrogen containing functional groups shown in the FTIR analysis reveal that hydrogen bonding of tetracycline to the biochar surface is also possible. The OH groups present on the tetracycline can interact with the oxygen containing functional groups present in the biochar (Shen et al, 2020).…”

Section: Adsorption Kinetics and Isothermsmentioning

confidence: 99%

The removal of tetracycline from water using biochar produced from agricultural discarded material

Hoslett

Ghazal

Katsou

et al. 2021

Science of The Total Environment

134

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An issue of significant importance worldwide is the contamination of water with antibiotics giving rise to antibiotic resistance in the environment. Antibiotics such as tetracycline are widely used in agriculture, as such they can pollute water courses, providing a means by which environmental bacteria can evolve antibiotic resistance genes. Biochar can form part of a solution as it is a well-known adsorbent. This material can be efficient in the adsorption of a wide range of pollutants and is inexpensive. An innovative heat pipe reactor was used to produce biochar from excess food and garden materials. This biochar was characterised using scanning electron microscopy with energy dispersive X-ray analyser (SEM-EDAX), Fourier transform infrared (FTIR) spectroscopy and Raman spectroscopy. The biochar produced had an adsorption capacity between 2.98 mg/g and 8.23 mg/g for initial tetracycline concentrations of 20 mg/l and 100 mg/l, respectively. The Freundlich isotherm provided the best fit to the experimental data. Kinetics examination revealed a rapid adsorption of tetracycline during the initial stages. The Elovich equation fitted the experimental data well. This adsorbent could therefore be produced at the site of an agricultural enterprise through the pyrolysis of agriculture waste and then used to reduce the infiltration of antibiotics into the environment.

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Section: Adsorption Kinetics and Isothermsmentioning

confidence: 99%

The removal of tetracycline from water using biochar produced from agricultural discarded material

Hoslett

Ghazal

Katsou

et al. 2021

Science of The Total Environment

134

View full text Add to dashboard Cite

show abstract

“…As shown in Figure 6, as the temperature increased from 25 to 45 ℃, the TC adsorption capacity of the three BC materials gradually increased. The TC adsorption capacity of BC increased as the temperature and speed of molecular movement increased (Shen et al 2020). In addition, the chemical processes in the adsorption process are intensi ed at high temperatures ).…”

Section: Effect Of Temperature On Tc Adsorptionmentioning

confidence: 99%

“…In addition, the attachment of MnO x promoted the pyrolysis of CS, thereby resulting in the formation of many pores and roughening the surface of the modi ed BC, which led to an increase in the external speci c surface area of the BC and an increase in the contact surface with TC, which was more conducive to the adsorption of TC ( could have caused an increase in the pore diameter, thereby increasing the speci c surface area and pore volume. Furthermore, an increase in the pore volume contributed to the entry of TC into the internal pore system (Shen et al 2020).…”

Section: Bc Characterizationmentioning

confidence: 99%

Removal and Adsorption Mechanism of Tetracycline Using Manganese-modified Cotton Straw Biochar in an Aqueous Solution

Liu

Shi

et al. 2021

Preprint

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Farming in China’s rural areas leads to antibiotic pollution in waterbodies making it a grave issue. Cotton straw biochar (CSBC) was prepared by oxygen-limited pyrolysis at 400 °C (CSBC400) and 600 °C (CSBC600); and Mn-modified CSBC (MCSBC) was produced by the KMnO4 wrapping method for tetracycline (TC) removal from aqueous solutions. The effects of temperature, initial solution concentration, pH, ion type, and ionic strength on TC adsorption were investigated. The adsorption process of the biochars achieved an equilibrium state after 360 min, and the highest equilibrium adsorption amount (13.254 mg/g) was found for MCSBC. The kinetic adsorption process, which was dominated by chemisorption, was well-described by the pseudo-second-order kinetic model. The adsorption was a non-homogeneous heat absorption process, and the adsorption isotherm data fitting was compatible with the Freundlich model. A better adsorption effect of MCSBC was observed when the pH was < 4. Monovalent cations (Na+, K+, NH4+, and Ca2+) had a facilitative effect on the adsorption process. The adsorption mechanisms of TC by MCSBC included pore diffusion, H bonding, electrostatic interactions, and π–π accumulation. Therefore, MCSBC has a good adsorption capacity for TC and can be used for the treatment of TC-based pollutants in aqueous environments.

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“…9B and Fig. 9C shows Pseudo-first-order [41], pseudo second-order [42] and the intra-particle diffusion model [43] have been used to investigate the mechanism of adsorption of phenol on biochar. The first-order mechanism can be expressed by the following equation (Eq.…”

Section: 3effect Of Contact Time On Adsorption Capacity and Reaction Kineticsmentioning

confidence: 99%

Removal of phenol from aqueous solution using biochar produced from Araucaria Columnaris Bark

Chandola¹,

Thathola²,

Bisht³

2021

Preprint

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This work investigates the removal of phenol from aqueous solution using Araucaria Columnaris bark (ACB) as biochar. Five different types of biochars were developed through pyrolysis at different temp from 300 to 500°C. The effects of initial concentration, contact time, pH and temperature on adsorption behavior were studied in batch mode for each biochar. The optimum contact time observed for equilibrium condition was 60 mins for every biochar. And, the maximum adsorption followed the order 298 K > 308 K > 318 K. Adsorption equilibrium data were fitted to Langmuir and Freundlich isotherms by non-linear regression method and kinetic data by linear regression method, and fitted to pseudo-first order, pseudo-second order and Intraparticle diffusion models. Adsorption kinetics was reasonably described by pseudo-second order model with R 2 value 0.99. Thermodynamic parameters were also estimated that implied, the adsorption process was spontaneous and exothermic in nature. Study further showed that the acidic pH increased adsorption capacity of biochar but decreases continuously towards basic side. The removal of phenol with prepared biochar was achieved as high as 100 % for ACB-500. The maximum iodine adsorption value of prepared biochar was found to be 453.3 mg/g.

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Removal of tetracycline from an aqueous solution using manganese dioxide modified biochar derived from Chinese herbal medicine residues

Cited by 168 publications

References 63 publications

The removal of tetracycline from water using biochar produced from agricultural discarded material

The removal of tetracycline from water using biochar produced from agricultural discarded material

Removal and Adsorption Mechanism of Tetracycline Using Manganese-modified Cotton Straw Biochar in an Aqueous Solution

Removal of phenol from aqueous solution using biochar produced from Araucaria Columnaris Bark

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