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Journal of Hazardous Materials

Journal of Hazardous Materials

IF: 12.2
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Thiolated non-conjugated nano polymer network for advanced mercury removal from water

Published:9 December 2024 DOI: 10.1016/j.jhazmat.2024.136817
Daikun Li, Wanying Deng, Yongmin Wang, Yu Tian, Dingyong Wang

Abstract

Developing advanced adsorbents for selectively deducing mercury (Hg) in water to one billionth level is of great significance for public health and ecological security, but achieving the balance among efficiency, cost and environmental friendliness of adsorbents still faces enormous challenges. Herein, we present a high thiol content non-conjugated nano polymer network (PVB-SH) through simple microemulsion polymerization for efficient Hg ion (Hg(II)) removal. The PVB-SH is prepared by conventional commercial reagents and does not consume toxic organic solutions. This nano network reveals uniformly distributed nano sizes, leading to good accessibility of adsorption sites. The long and flexible polymer chains in the network allow two thiol sites to coordinate with one Hg(II), displaying significantly stronger binding than 1:1 coordination. Therefore, PVB-SH shows high affinity toward Hg(II) (Kd=3.04×107?mL/g) and can selectively reduce Hg(II) in water to extremely low level of 0.14?μg/L, well below the safe limit of 2?μg/L. PVB-SH possesses excellent renewability (removal efficiency =99.58% after 10 regenerations), good resistance to various environmental factors (pH, ions and organic matter) and long-term stability in acid, alkali, and salt solutions. Impressively, PVB-SH is further made into a membrane by simple phase-inversion and can effectively purify 1592.4?L/m2 Hg(II) polluted drinking water before the breakthrough point of 2?μg/L. These results demonstrate the good practical potential of PVB-SH for decontamination of Hg from aqueous media.

Substances (4)

Materials
Procduct Name CAS Molecular Formula Supplier Price
N,N-Dimethylformamide 68-12-2 C3H7NO 1312 suppliers $11.20-$14488.10
Thiourea 62-56-6 CH4N2S 638 suppliers $7.62-$1550.00
Humic acid 1415-93-6 C9H9NO6 379 suppliers $11.00-$4880.00
Cupric nitrate trihydrate 10031-43-3 CuH3NO4 246 suppliers $10.00-$5070.00

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