The rapid spread of the aquatic macrophyte water hyacinth (Eichhornia crassipes) has become a major ecological concern. This study evaluated the physicochemical, structural, and chemical characteristics of water hyacinth biomass collected from four different environments (freshwater bodies, near Boragaon dump sites, agricultural run-off areas, and industrial areas). The physicochemical properties varied across the sampling locations and plant parts. Samples collected from the Boragaon area showed the total nitrogen content ranged from 1.99% to 3.68%. Organic matter content ranged from 81.04% to 81.39% in leaf and stem samples from the industrial area, whereas root and whole-plant samples from Boragaon showed values ranging from 76.69% to 84.30%. The highest total phosphorus content (3585 mg/kg) was recorded in stem samples from Boragaon, while the lowest value (315 mg/kg) was found in root samples from the freshwater body. Heavy metal analysis also showed differences among the sampling locations, with the highest Cd concentration (1.09 mg/kg) recorded in whole-plant samples collected from the industrial area. These variations indicate that the surrounding environmental conditions and degree of pollution may influence the composition and potential utilization of E. crassipes biomass. Fourier Transform infrared (FTIR) analysis showed variations in polysaccharide-related bands, aromatic structures, and oxygen-containing functional groups in the different samples. Gas Chromatography-Mass Spectrometry (GC-MS) analysis further identified a broad spectrum of fatty acid derivatives, phenolic compounds, hydrocarbons, and organic acids, with their occurrence varying across sampling locations. These findings provide a location-specific basis for assessing the suitability of water hyacinth biomass for various industrial bioresource uses and stress the importance of accounting for environmental conditions during biomass evaluation.



