Highly efficient adsorption of Bisphenol A using NaHCO3/CO2 activated carbon composite derived from shrimp shell@cellulose

Zafar, Fatemeh Fazeli; Marrakchi, Fatma; Barati, Bahram; Yuan, Chuan; Cao, Bin; Wang, Shuang

doi:10.1007/s11356-022-20564-9

Cited by 10 publications

(1 citation statement)

References 51 publications

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“…According to the IUPAC classification, at low relative pressures, the N 2 adsorption and desorption isotherms of both materials resemble Type I isotherms, indicating a significant enhancement in adsorption capacity and the presence of a substantial number of micropores [19]. Hysteresis loops appear at a relative pressure of around 0.5, suggesting that both materials possess mesoporous structures [20]. When the relative pressure exceeds 0.9, the N 2 adsorption-desorption curves for both materials continue to increase significantly, indicating the presence of some macropores [21].…”

Section: Sample Characterizationmentioning

confidence: 96%

Nitric Acid-Treated Blue Coke-Based Activated Carbon’s Structural Characteristics and Its Application in Hexavalent Chromium-Containing Wastewater Treatment

Wang,

Luoyang

et al. 2023

Molecules

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This study primarily focused on the efficient transformation of low-priced blue coke powder into a high-capacity adsorbent and aimed to address the pollution issue of hexavalent chromium (Cr (VI))-laden wastewater and to facilitate the effective utilization of blue coke powder. A two-step method was utilized to fabricate a blue coke-based nitric acid-modified material (LCN), and the impact of nitric acid modification on the material’s structure and its efficacy in treating Cr (VI)-contaminated wastewater was evaluated. Our experimental results illustrated that, under identical conditions, LCN exhibited superior performance for Cr (VI) treatment compared to the method employing only potassium hydroxide (LCK). The specific surface area and pore volume of LCN were 1.39 and 1.36 times greater than those of LCK, respectively. Further chemical composition analysis revealed that the functional group structure on the LCN surface was more conducive to Cr (VI) adsorption. The highest amount of Cr (VI) that LCN could bind was measured at 181.962 mg/g at 318 K. This was mostly due to chemisorption, which is dominated by redox reactions. The Cr (VI) removal process by LCN was identified to be a spontaneous, exothermic, and entropy-increasing process. Several tests on recycling and reuse showed that LCN is a stable and effective chromium-containing wastewater adsorbent, showing that it could be used in many situations.

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Section: Sample Characterizationmentioning

confidence: 96%