Citrate-modified biochar for simultaneous and efficient plant-available silicon release and copper adsorption: Performance and mechanisms

AbstractIn this study, biochars derived from bagasse were prepared and their ability for the adsorption of four kinds of sulfonamide antibiotics (sulfamethoxazol, thiazole, methylpyrimidine, dimethylpyrimidine) was investigated. Results showed that the modified biochar can efficiently adsorb sulfonamides in water. The biochar obtained at 500oC and modified with 30% hydrogen peroxide was chosen as the adsorbent. Under optimum conditions, pH 4 and 35°C, great adsorption performance was exhibited in the adsorption process of the four sulfonamide antibiotics. The productivity of the modified biochar was ~ 89% compared to un-modified biochar which is ~31%. The successful preparation of biochar from bagasse indicates that it is a good way to reuse the resources. Besides the adsorption of antibiotics, the obtained material also has a great prospect in the removal of other pollutants.

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An alkali modified biochar for enhancing Mn2+ adsorption: Performance and chemical mechanism

Materials Chemistry and Physics ◽

10.1016/j.matchemphys.2020.122895 ◽

2020 ◽

Vol 248 ◽

pp. 122895 ◽

Cited By ~ 3

Author(s):

Qiang An ◽

Yue Miao ◽

Bin Zhao ◽

Zheng Li ◽

Sheng Zhu

Keyword(s):

Chemical Mechanism ◽

Adsorption Performance ◽

Modified Biochar

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Fe–Mn–Ce oxide-modified biochar composites as efficient adsorbents for removing As(III) from water: adsorption performance and mechanisms

Environmental Science and Pollution Research ◽

10.1007/s11356-019-04914-8 ◽

2019 ◽

Vol 26 (17) ◽

pp. 17373-17382 ◽

Cited By ~ 9

Author(s):

Xuewei Liu ◽

Minling Gao ◽

Weiwen Qiu ◽

Zulqarnain Haider Khan ◽

Nengbin Liu ◽

...

Keyword(s):

Water Adsorption ◽

Adsorption Performance ◽

Modified Biochar

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Enhanced removal of NO3-N from water using Fe-Al modified biochar: behavior and mechanism

Water Science & Technology ◽

10.2166/wst.2020.033 ◽

2019 ◽

Vol 80 (10) ◽

pp. 2003-2012 ◽

Cited By ~ 1

Author(s):

Hanyang You ◽

Wenying Li ◽

Yi Zhang ◽

Zilin Meng ◽

Zhenxiao Shang ◽

...

Keyword(s):

Ligand Exchange ◽

Adsorption Process ◽

Maximum Adsorption Capacity ◽

Batch Experiments ◽

Order Model ◽

Freundlich Model ◽

Adsorption Mechanisms ◽

Adsorption Performance ◽

Modified Biochar ◽

N Removal

Abstract To remove NO3-N from water, coconut shell biochar (CSB) was modified by a solution of FeCl3, a solution of AlCl3 and a mixture solution of FeCl3 and AlCl3 respectively. The obtained modified biochar with the best effect of NO3-N adsorption was screened out to explore the adsorption behavior and mechanism of NO3-N removal by batch experiments and kinetics and thermodynamics and correlated characterization. The results indicated that the mixture solution of FeCl3- and AlCl3- modified CSB (Fe-Al/CSB) showed the best adsorption performance for NO3-N removal. Iron and aluminum elements existed on the surface of Fe-Al/CSB in the form of FeOOH, Fe2O3, Fe2+, and Al2O3 respectively. The adsorption process could reach equilibrium in 20 min. An acidic condition was favorable for NO3-N adsorption. The presence of coexisting anions was not conducive for NO3-N adsorption. The quasi-second-order model and Freundlich model could be well fitted in the adsorption process. The maximum adsorption capacity of Fe-Al/CSB fitted by the Langmuir model could reach 34.20 mg/g. The adsorption of NO3-N by Fe-Al/CSB was an endothermic and spontaneous process. Ligand exchange and chemical redox reaction were the NO3-N adsorption mechanisms which led to NO3-N adsorption by Fe-Al/CSB.

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Removal of Cr by Modified Biochar Derived from Corn Husk

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2021.19185 ◽

2021 ◽

Vol 21 (7) ◽

pp. 3965-3970

Author(s):

Hyungjoo Kim ◽

Jin Sun Cha ◽

Jieun Park ◽

Young-Min Kim ◽

Young-Kwon Park

Keyword(s):

Performance Test ◽

Adsorption Efficiency ◽

X Ray Diffraction ◽

X Ray ◽

Adsorption Performance ◽

Modified Biochar ◽

Corn Husk ◽

Chromium Adsorption ◽

Adsorption Desorption ◽

Scanning Electron

In this study, the physicochemical properties of modified biochar using different methods, such as physical (CO2, steam) and chemical (KOH and H3PO4) methods, were estimated by X-ray diffraction, N2 adsorption-desorption, field-emission scanning electron microscopy equipped with energy-dispersive X-ray spectroscopy, and Fourier transform infrared spectroscopy. The performance of chars was evaluated using a Cr adsorption performance test. Among various chars modified in this study, CHC-P modified by H3PO4 showed the highest chromium adsorption efficiency. The adsorption efficiency was affected by the high nano-porosity, large surface area, and surface oxygen-containing functional groups.

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