The effects of carbon disulfide driven functionalization on graphene oxide for enhanced Pb(II) adsorption: Investigation of adsorption mechanism.

Industrial wastewater has brought great disaster to water bodies and soils and seriously affected the growth of crops. It is necessary to prepare a stable, effective, and sustainable treatment agen...

Construction of a Lignosulfonate–Lysine Hydrogel for the Adsorption of Heavy Metal Ions

Industrial alkali lignin-derived biochar as highly efficient and low-cost adsorption material for Pb(II) from aquatic environment.

Lignin is one the most fascinating natural polymers due to its complex aromatic-aliphatic structure. Phenolic hydroxyl and carboxyl groups along with other functional groups provide technical lignins with reactivity and amphiphilic character. Many different lignins have been used as functional agents to facilitate the synthesis and stabilization of inorganic materials. Herein, the use of lignin in the synthesis and chemistry of inorganic materials in selected applications with relevance to sustainable energy and environmental fields is reviewed. In essence, the combination of lignin and inorganic materials creates an interface between soft and hard materials. In many cases it is either this interface or the external lignin surface that provides functionality to the hybrid and composite materials. This Minireview closes with an overview on future directions for this research field that bridges inorganic and lignin materials for a more sustainable future.

https://chemistry-europe.onlinelibrary.wiley.com/doi/pdf/10.1002/cssc.202000216

Lignin–Inorganic Interfaces: Chemistry and Applications from Adsorbents to Catalysts and Energy Storage Materials

Enhancement of cadmium adsorption by EPS-montmorillonite composites.

Biomolecules (lignin) were used as additives for the synthesis of titanate/TiO2 nanomaterials, and their adsorption properties and photocatalytic properties were studied. They were based on corn stalks, cotton stalks, poplar twigs and willow shavings, respectively. Lignin was extracted from it to aid in the synthesis of titanate nanotube material. The products were characterized by XRD (X-Ray Diffraction), FESEM (Field emission scanning electron microscopy), TEM, FTIR (Fourier Transform Infrared Spectroscopy) and BET, and their adsorption properties were studied. The study found that by comparing the maximum adsorption capacity of heavy metal ions (Pb2+, Cu2+, Cd2+) with four different lignin-containing titanate nanotube materials, the adsorption performance of the lignin-assisted synthesis of titanate nanotubes (WL-TNTs) was optimal. WL-TNTs material had good adsorption effect on Pb2+, Cu2+ and Cd2+, especially Pb2+ had a good adsorption effect over a wide pH range (pH of 2–7). At pH = 6 (lead ion was 5.5) and at 25 °C, the maximum adsorption capacity of WL-TNTs for Pb2+, Cu2+ and Cd2+ reached 677.6 mg/g, 258.2 mg/g and 308.5 mg/g, respectively, and the adsorption rate was fast. The lead ions can be adsorbed almost completely in 5 min and the best dosage of adsorbent was only 0.2 g/L. At the same time, the material had excellent adsorption and analytical regeneration performance. It was a good and economical adsorbent and had broad application prospects.

Yuan Fu

Papers

Adsorption of heavy metal sewage on nano-materials such as titanate/TiO2 added lignin