چكيده به لاتين
Due to the increasing growth of various industries, water pollution has become one of the basic problems all over the world. Heavy metals are considered one of the most important sources of water pollution. These pollutants are harmful to humans, animals, and aquatic plants due to their widespread toxicity and need to be absorbed from wastewater before entering the environment. Currently, there are various methods for water purification. which includes coagulation and coagulation, oxidation, membrane filtration, ion exchange, surface absorption, and electrochemical methods. Among the mentioned methods, absorption is suggested as an effective method of removing pollutants due to its wide flexibility, ease of the process, and wide range of available adsorbents. Hydrogels are a group of polymeric materials with a network structure and physical and chemical crosslinks. Hydrogels have wide applications in the fields of medicine, drug delivery, agriculture, and separation processes due to their three-dimensional polymer network structure and high flexibility. According to the physical and chemical structure of hydrogels, they have a high absorption capacity while maintaining their network structure. In this research, to remove copper heavy metal ions, magnetic nano hydrogel based on chitosan/inosine was used as an adsorbent. The structure of magnetic nano hydrogel was identified by the infrared spectrometer, vibrational sample absorption magnetism, X-ray diffraction pattern, etc. During the present study, the effect of parameters such as pH, time, concentration, and amount of adsorbent on heavy metal absorption was investigated. The results showed that the studied adsorbent had a very high efficiency for absorbing the mentioned metal. The maximum absorption capacity was 959 mg/g. Also, using the experimental data of Langmuir, Freundlich, and Temkin isotherm models and equilibrium and kinetic studies, the absorption process was evaluated, and it was found that the absorption process follows the Freundlich isotherm model and the pseudo-second-order kinetic model. Also, in the initial investigation of lead metal absorption, it was determined that the maximum capacity of lead metal absorption by magnetic nano hydrogel adsorbent is 1650 mg/g.
