ADSORPTION PROPERTIES OF TYPICAL ANTIBIOTICS BY COMPOSITE MAGNETIC NANO-GEL BEADS

CENG Zi-jun; LIANG Ying; RONG Hong-wei; LUO Hua-yong; LIAO Quan

doi:10.13205/j.hjgc.202205009

Volume 40 Issue 5

Jul. 2022

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2022 > 40(5): 59-66

CENG Zi-jun, LIANG Ying, RONG Hong-wei, LUO Hua-yong, LIAO Quan. ADSORPTION PROPERTIES OF TYPICAL ANTIBIOTICS BY COMPOSITE MAGNETIC NANO-GEL BEADS[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(5): 59-66. doi: 10.13205/j.hjgc.202205009

Citation:

CENG Zi-jun, LIANG Ying, RONG Hong-wei, LUO Hua-yong, LIAO Quan. ADSORPTION PROPERTIES OF TYPICAL ANTIBIOTICS BY COMPOSITE MAGNETIC NANO-GEL BEADS[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(5): 59-66. doi: 10.13205/j.hjgc.202205009

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ADSORPTION PROPERTIES OF TYPICAL ANTIBIOTICS BY COMPOSITE MAGNETIC NANO-GEL BEADS

doi: 10.13205/j.hjgc.202205009

School of Civil Engineering, Guangzhou University, Guangzhou 510006, China

Received Date: 2021-05-03
Available Online: 2022-07-02

Abstract

Abstract

The removal efficiency of antibiotic pollutants such as sulfamethoxazole(SMX), ciprofloxacin(CIP) and methoxyphenidine(TMP) were studied using magnetic nano-gel beads(Fe₃O₄@PVA-SA-PAC) composite, and the influences of pH, dosage, initial concentration of pollutants and adsorption time on the adsorption process were analyzed. The result showed that pH=3 was the optimal condition. The adsorption capacity increased with the increase of initial concentration and decreased with the increase of dosage. The adsorption of these three antibiotics by Fe₃O₄@PVA-SA-PAC showed the coexistence of physical and chemical adsorption, also homogeneous monolayer adsorption and heterogeneous multi-molecular layer adsorption. The adsorption of SMX and CIP was more consistent with the pseudo-first-order kinetic model, while TMP was more consistent with the pseudo-second-order kinetic model. At 308 K, both the Langmuir equation and Freundlich equation reached a high fitting degree(0.938 ≤ R² ≤ 0.998). By now, the maximum adsorption capacity of SMX, TMP and CIP were 47.188 mg/g, 59.649 mg/g and 96.468 mg/g, respectively. Competitive adsorption experiments showed that the composite gel beads could simultaneously adsorb a variety of target antibiotic pollutants, indicating a good application prospect of adsorption.
- antibiotics,
- magnetic nano-gel beads,
- adsorbent,
- competitive adsorption

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References(33)

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