Hydrogel-activated hydrochar synergy for efficient wastewater purification: tackling imidacloprid pesticides and crystal violet dye. - Hassan, Mohamed A.; Al-Shemy, Mona T.; Kamal, Kholod H.; Strachota, Beata; Strachota, Adam; Pavlova, Ewa; Konefał, Magdalena; Kamel, Samir (Applied Water Science, 2025)