Dates kernels bio-waste considered as an environmental problem due to its huge mass from dates industry. The global environmental aim to solve the environmental issues using green techniques. So, the idea to use dates kernels as an abundant and renewable organic source and ecofriendly solution for green adsorbent preparation.Hydrochar during the last few years attracted the researcher’s attention as an excellent solution for environmental application. This work aimed to prepare hydrochar from dates kernels feedstocks and using the Fourier-transform infrared spectroscopy (FTIR) as rapid and precise method to characterize the functionalgroups of the hydrochar surface, which reflects the capability of hydrochar to be used as an adsorbent for different environmental pollutants. In This work dates kernels feedstock has been dried at 100 ˚ C for 200 min then 150 ˚C for 60 min. Then, Hydrothermal Carbonization (HTC) process was done at 180 ˚C for 200 minutes for hydrochar preparation. Distilled water has been used as HTCmedium. The density, yield and pH has been tested. FTIR spectra for dried dates kernels, hydrochar differs, which shows the changes that took place during the HTC process. The appeared function groups in most biomass feedstocks aliphatic hydroxyl, carboxyl, CH, C=O, C=C. After the hydrothermal carbonization process, this peak reduced indicating that the lignin only decomposed partially under the studied condition. Also, it is indicating distortion of the C-H bonds in aromatic compounds. The study concludes thathydrochar from dates kernels feedstock can be used as an effective green adsorbent for water pollutants.