Tidal flats, a type of coastal wetland, play an important role by providing space for socioeconomic development, various resources, and high biodiversity. Connected to the mainland, tidal flats are affected by both human activities and natural processes, which cause erosion, accumulation of pollutants, and loss of biological resources. Studying the sediments of tidal flats can provide details of natural phenomena and human activities as key factors to understand sedimentary processes and human impacts.
Sericite sample from Son Binh, Huong Son, Ha Tinh was used to remove Pb2+ ion from aqueous solution. The effects of factors including pH, contact time, mass of serisite and Pb2+ initial concentration on the adsorption Pb2+ efficiency and capacity were investigated. The results showed that the adsorption capacity and removal efficiency of Pb2+ reached 2,54 mg/g and 89 % at the suitable conditions: 0.7g sericite, Pb2+ intinal concentration of 40 mg/L and contact time 60 minutes at room temperature (25°C) and pH0 5,3. The adsorption process follows the Langmuir adsorption isotherm model with the maximum monolayer adsorption capacity of 5.52 mg/g and follows the pseudosecond-order kinetic equation.
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