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Bioresource Technology

Bioresource Technology

IF: 9.69
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Weak interaction strategy enables enhanced selectivity and reusability of arginine-functionalized imprinted aerogel for phosphate adsorption

Published:10 December 2024 DOI: 10.1016/j.biortech.2024.131960 PMID: 39667628
Lidong Feng,?Tianxiao Leng,?Yangbo Qiu,?Chao Wang,?Long-Fei Ren,?Haoyu Sun,?Liang Tang,?Jiahui Shao,?Minghong Wu

Abstract

Efficient phosphate adsorption from eutrophic waters remains challenging, fundamentally due to inherent trade-off in common adsorbents: high-binding energy between adsorbent and phosphate compromises reusability while low-binding energy suppresses selectivity. Herein, an innovative arginine-functionalized imprinted aerogel (AFIA-1:4) was fabricated by click chemistry and imprinting modification for overcoming this trade-off through synergistic weak interactions. Results shown that AFIA-1:4 exhibited high adsorption capacity (Qmax of 40.65?mg/g, 30.44?% higher than phoslock), rapid kinetics (15?min), and broad pH applicability (3-11) at 2?mg P/L solution. Moreover, its selectivity coefficient ranged from 10 to 90 even with 15- to 125-fold excess interfering anions, surpassing common adsorbents. After 10 cycles, AFIA-1:4 still maintained 98.15?% regeneration rate with 99.14?% phosphate desorption. Characterizations and calculations confirmed core roles of multiple hydrogen bonds and shape screening in maintaining selectivity and reusability. These findings advanced development of next-generation of phosphate adsorbents, which contributed to sustainable prevention and management of eutrophication.

Substances (3)

Materials
Procduct Name CAS Molecular Formula Supplier Price
Chitosan 9012-76-4 C6H11NO4X2 862 suppliers $14.00-$1125.56
Humic acid 1415-93-6 C9H9NO6 343 suppliers $44.40-$4880.00
DL-Arginine 7200-25-1 C6H14N4O2 264 suppliers $8.00-$5543.83

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