A Novel Adsorbent of Attapulgite & Carbon Composites Derived from Spent Bleaching Earth for Synergistic Removal of Copper and Tetracycline in Water

Yuxin Ke, Xiaoli Zhu (), Shaocheng Si, Ting Zhang, Junqiang Wang and Ziye Zhang
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Yuxin Ke: College of Urban and Environmental Science, Northwest University, Xi’an 710127, China
Xiaoli Zhu: College of Urban and Environmental Science, Northwest University, Xi’an 710127, China
Shaocheng Si: College of Urban and Environmental Science, Northwest University, Xi’an 710127, China
Ting Zhang: College of Urban and Environmental Science, Northwest University, Xi’an 710127, China
Junqiang Wang: College of Urban and Environmental Science, Northwest University, Xi’an 710127, China
Ziye Zhang: Xi’an Jinborui Ecological Tech. Co., Ltd., Xi’an 710065, China

IJERPH, 2023, vol. 20, issue 2, 1-15

Abstract: Simultaneously eliminating tetracycline (TC) and copper (Cu-II) from wastewater was investigated by applying a novel adsorbent fabricated by transforming spent bleaching earth (SBE) into attapulgite & carbon composites (A&Cs). Pyrolysis temperature for A&Cs preparation exhibited a positive effect on Cu(II) adsorption, while the AC500 possessed the greatest performance for TC remediation. Interestingly, a synergistic effect instead of competitive adsorption occurred between Cu(II) and TC under the combined binary system, as both TC and Cu(II) adsorption amount on A&C500 increased more than that in the single system, which could be mainly attributed to the bridge actions between the TC and Cu(II). In addition, hydrogen bonding, ᴨ-ᴨ EDA interaction, pore-filling and complexation exerted significant roles in the adsorption process of TC and Cu(II). In general, this study offered a new perspective on the regeneration of livestock and poultry industry wastewater polluted with antibiotics and heavy metals.

Keywords: tetracycline; copper; synergistic removal; attapulgite & carbon composites; adsorption mechanisms (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2023
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