In this project, the necessity of constantly determining the amounts of organic and inorganic species in environments such as water, food and the environment with which living metabolism, which is greatly affected by its amount even at trace levels, comes into direct or indirect contact, requires boron, one of the adsorbent materials with high surface area and pore size diversity. In which nitride-modified Fe3O4/MWO4 nanocomposites will be used as adsorbents, sensitive, sensitive and selective microextraction of pollutants will make the results of the project more attractive. In addition, the prepared adsorbent material is planned to serve as photocatalysts in the photocatalytic pollution removal process, where water and sunlight, which are renewable energy sources, and have good reusability, do not contain secondary pollution, with their large surface area, high magnetic properties, superior optical and electrochemical properties. It attracts attention with its applicability to different application areas. The aim of this study is to prepare low-cost, highly reusable, environmentally friendly multifunctional nanomaterials and to carry out solid phase microextraction studies of imidacloprid pesticide, Rhodamine B and Sudan (I, II, III) dyes, which are on the TÜBİTAK micropollutant list, in natural and artificial real samples, and then to to compare with the results obtained in photocatalytic degradation studies.