Abstract
The latest tendency of the scientific community regards the development of different classes of green materials able to solve pollution problems caused by industrial and human activity. In this paper, chitosan and diatomite were used to produce a broad-spectrum hybrid adsorbent, either in powder or in monolithic form for environmental pollutant removal. Diatomite–chitosan-based powders and porous diatomite–chitosan hybrids were prepared and characterized by chemical-physical, thermal and morphological analysis. Moreover, their adsorbent capacity towards anionic dye (Indigo Carmine) was also evaluated. Obtained data showed that chitosan improves the adsorption capacity of both systems, increasing the uptake of dye in both diatomite–chitosan systems.
Highlights
The impact of toxic or hazardous compounds, such as heavy metals and dyes, on the environment is a huge problem, because they can alter several ecosystems by influencing the vital balance and the life mechanics of all living species [1]
In the FTIR spectrum of diatomite chitosan-based powders (DC) powder, the vibration peaks related to presence of both D and C
Act as adsorption sites located on the diatomite surface [36,37], above all because the production of the DCs was obtained by mixing in diatomite with solubilized chitosan in acetic water solution
Summary
The impact of toxic or hazardous compounds, such as heavy metals and dyes, on the environment is a huge problem, because they can alter several ecosystems by influencing the vital balance and the life mechanics of all living species [1]. Large-scale pollution caused by industrial, agricultural and municipal activities generates wastewater, which contains many toxic compounds [5] For this reason, scientific and industrial communities are putting great effort into creating sustainable and multifunctional absorbent materials capable to remove or absorb toxic materials [6,7,8,9]. Scientific and industrial communities are putting great effort into creating sustainable and multifunctional absorbent materials capable to remove or absorb toxic materials [6,7,8,9] In this respect, the development of multifunctional porous materials based on natural compounds such as Diatomite [10] and chitosan [11] is a very interesting approach [12]. Thanks to the high content of active functional groups such as amino and hydroxyl groups, it has drawn particular attention as a potential effective sorbent material, mainly for heterogeneous
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