NDLI: Highly Efficient Removal of Cr(VI) from Aqueous Solutions by Polypyrrole/Monodisperse Latex Spheres

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Highly Efficient Removal of Cr(VI) from Aqueous Solutions by Polypyrrole/Monodisperse Latex Spheres

Content Provider	Semantic Scholar
Author	Du, Linlin Gao, Peng Meng, Yide Liu, Yuanli Le, Shangwang Yu, Chuanbai
Copyright Year	2020
Abstract	Pyrrole (Py) is easily agglomerated during the polymerization process, affecting its performance. In this paper, polypyrrole/monodispersed latex sphere (PPy/MLS) composites were prepared using in-situ polymerization for the adsorption of hexavalent chromium (Cr(VI)). The specific surface area of PPy/MLS (39.30 m2/g) was increased relative to that of PPy (24.82 m2/g), thus providing more effective adsorption sites. In addition, the adsorption properties of Cr(VI) under different conditions, including Py content, pH of the aqueous solution, and PPy/MLS dosage, were investigated to reveal the adsorption mechanism. The results showed that PPy/MLS possessed high Cr(VI) adsorption capacities when the Py content was 50 wt %. The maximum adsorption capacity was 343.64 mg/g at pH 2.0 and 25 °C. Remarkably, the adsorbents exhibited an excellent removal rate of Cr(VI) after three cycles of adsorption-desorption (over 99%), suggesting that the adsorbents had exceptional recyclability. Furthermore, the adsorption process followed quasi-second-order kinetics and Langmuir isothermal adsorption model. The high adsorption performance, sustainability, and cost-efficiency make this adsorbent a promising candidate for large-scale Cr(VI) contaminant removal.
Starting Page	6651
Ending Page	6660
Page Count	10
File Format	PDF HTM / HTML
DOI	10.1021/acsomega.9b04438
Alternate Webpage(s)	https://s3-eu-west-1.amazonaws.com/pstorage-acs-6854636/22067496/ao9b04438_si_001.pdf
PubMed reference number	32258900
Alternate Webpage(s)	https://doi.org/10.1021/acsomega.9b04438
Journal	Medline
Volume Number	5
Journal	ACS omega
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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