A Novel Hollow Carbon@MnO2 Electrospun Nanofiber Adsorbent for Efficient Removal of Pb2+ in Wastewater

Origin of the exceptional selectivity of NaA zeolite for the radioactive isotope 90Sr2+

“…10(b) and (c) and Table 5 indicate that the adsorption of Sr 2+ in NaA follows the Langmuir model, suggesting a monolayer adsorption. 65 According to the Langmuir model, the calculated maximum adsorption capacity of NaA for Sr 2+ is 294.12 mg g −1 , which is slightly lower than the theoretical adsorption capacity (308.52 mg g −1 ) calculated based on the chemical composition. This result shows that Sr 2+ can exchange almost all Na + ions.…”

Synthesis of a low-silica CHA zeolite with exceptional selectivity for radioactive137Cs+

“…5 (b), (c) and Table 5 indicate that the adsorption of Cs + in the Na-CHA zeolite follows the Langmuir model, suggesting monolayer adsorption. 64 According to the Langmuir model, the calculated maximum adsorption capacity q m value of the Na-CHA zeolite for Cs + is 442.48 mg g −1 . Compared to the q m values of previously reported adsorbents, such as clay, commercial CST, commercial MFCs (Table S3 †), [65][66][67][68] the adsorption capacity of the Na-CHA zeolite is at the top level among all the reported adsorbents for 137 Cs + so far.…”

Treatment of Cadmium-Contaminated Water Systems Using Modified Phosphate Rock Powder: Contaminant Uptake, Adsorption Ability, and Mechanisms

“…Additionally, it has pore characteristics and redox abilities conducive to passivate heavy metals. Li et al [36,37] indicated that the adsorption capacity of Pb 2+ by MnO 2 composite nanofiber materials was higher than that of a nanofiber material alone, which was 46.83 mg g −1 , and the Pb 2+ removal rate from wastewater reached 194.37%. Furthermore, thiol groups have a high affinity for silver, mercury, Cd, and Pb ions [38], and the adsorption properties of thiol-modified graphene were found to be significantly improved compared to those of the raw materials [36,37].…”