The Ability of Chitin Roasting Carbon Composite Sheet to Absorb and Remove Just Cr (VI) and Rhb From Water

Author(s): Temesggen Feleke

There are currently a wide range of pollutants in wastewater, such as dyes and heavy metal ions.The most important adsorbents are those that can simultaneously remove dyes and heavy metal ions.This study used treated coal gasification slag and chitosan to make a renewable composite membrane.With a Cr (VI) maximum adsorption capacity of 50.0 mg/L, the composite membrane outperformed the chitosan membrane by 4.3% to 8.8%.For RhB adsorption, the removal rate of the chitosan membrane was only about 5%; however, the addition of coal gasification slag has the potential to increase this rate to 95.3 percent.The specific surface area of the chitosan membrane could be 16.2 times greater with the addition of coal gasification slag.This is because the chitosan membrane’s nanopores, which range in size from 80 to 110 micrometers, could be opened by coal gasification slag.Coordination bonds with the amino groups on the chitosan molecular chains were the primary means by which Cr (VI) was absorbed, as revealed by the analysis of adsorption kinetics and mechanism.In the meantime, when hydrogen bonds were formed with the surface of coal gasification slag, RhB adsorption took place.Additionally, coal gasification slag can increase the mechanical properties of the chitosan membrane by 2.2 times, facilitating the application of the composite membrane.This study examines coal gasification slag’s adsorbent design and resource utilization in greater depth.