期刊
ACS APPLIED MATERIALS & INTERFACES
卷 11, 期 50, 页码 46973-46983出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b17508
关键词
mercury ions; NH2-UiO-66; L-cysteine; adsorption; mechanism
资金
- National Natural Science Foundation of China [U1702252, 51664037]
Mercury ions can cause a series of hazards to humans and the environment, even in trace amounts. Here, we designed a novel adsorbent (Cys-UiO-66) by functionalizing NH2-UiO-66 with L-cysteine for selective removal of Hg(II) from solution. The Cys-UiO-66 was characterized by different instruments. The adsorption property of Cys-UiO-66 was evaluated by batch methods. The maximum adsorption capacity was 350.14 mg/g at pH 5.0. Furthermore, the adsorption isotherm and kinetics models were in accord with the Langmuir and pseudo-second-order models, respectively, evidencing that the adsorption behavior was dominated by monolayer chemisorption. The Cys-UiO-66 had better affinity for Hg(II) than other coexisting ions in wastewater and could be regenerated for at least five cycles. The results prove that Cys-UiO-66 is a talented and efficient sorbent for mercury ions.
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