<p>Stimuli-responsive biocomposite hydrogels were synthesized using acrylamide (AAm) monomer with glycidyl methacrylate (GMA) as a co-monomer, pectin as a natural polymer by free radical polymerization. The biocomposite hydrogels were characterized using Fourier transform infrared spectroscopy/attenuated total reflectance analysis, thermogravimetric analysis, and scanning electron microscopy techniques. Swelling studies showed that the present of AAm monomer contributed to high water content, and the obvious pH sensitive and salt properties were observed which proved the smart behavior of the acrylamide/glycidyl methacrylate (AAm/GMA) hydrogels and acrylamide/glycidyl methacrylate/pectin (AAm/GMA/Pect) biocomposite hydrogels. For the purpose of investigating the swelling capacity of biocomposite hydrogel systems, dynamic liquid adsorption tests and swelling-shrinkage tests were performed at 25&#xa0;°C pH 5.0–7.4–9.6 buffer solutions NaCl, Na₂CO₃ and Na₃PO₄ salt solutions. The hydrogels and biocomposite hydrogels had high water absorbency. ESP% values vary between 438 and 159% at pH 5.0, 465–171% at pH 7.4, and 2240–251% at pH 9.6. The highest ESP % values were obtained as 1489 and 1539 in 0.15&#xa0;M Na₃PO₄ solution. Based on the experimental data, key parameters related to liquid adsorption kinetics and diffusion mechanisms were determined. To evaluate the adsorption performance of the biocomposite hydrogels, studies on adsorption kinetics, temperature dependence, and adsorption–desorption behavior were conducted. Nile Blue (BB12) was used as a model compound in these investigations. Finally, the adsorption of BB12 varied in the range of 5.17%-86.39%. AAm/GMA hydrogels and AAm/GMA/Pect biocomposite hydrogels can be used as a sorbent in biotechnology, environment, sorption, desorption, chemical sensor, and enrichment of some species.</p>