Table 7.

Application of chitosan derivatives in wastewater purification.

Name	Application	Effect	References
Chitosan-O-arginine	Removal of heavy metals	Removal of heavy metals (Mn2+, Pb2+ and Al3+) was 97.1%, 94.3%, and 99%	[178]
Functionalized chitosan nanoparticles with pyrimidine derivative	Removal of heavy metals	Removal of Cr (VI), Pb (II), and Cd (II) plasma from highly contaminated tannery wastewater	[179]
Carboxymethyl chitosan biochar	Removal of heavy metals	Highly selective for heavy metal ions and it also presented good stability and reusability for industrial applications	[180]
Carboxyl-rich chitosan-based flocculant (CS-g-P (AM-IA))	Flocculation and decolorization	The decolorization ability of cationic dyes by CS-g-P(AM-IA) was greatly enhanced	[181]
N-guanidinium chitosan/silica-containing sulphonic acid group microhybrid	Dye adsorbent	Efficient and sustainable adsorbent for methylene blue removal	[182]
Quaternary chitosan magnetite nanosorbents	The removal of glyphosate	Efficiently remove glyphosate present in realistic environmental concentrations	[183]
Chitosan-derived Schiff base	Dye adsorbent	The synthesized bio-based adsorbent material is effective for the removal of rhodamine B dye from an aqueous solution	[184]
Sulfonated chitosan (S-CS)	Dye adsorbent	The S-CS is an effective and efficient adsorbent over a wide range of pH conditions for the removal of methylene blue	[185]
Quaternized trimethyl chitosan	Water disinfection	Better antifungal effect	[186]