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1. DEVELOPMENT OF POLYADSORBENTS BASED ON POLYETHYLENIMINE AND LOW MOLECULAR WEIGHT LIGANDS FOR THE EXTRACTION OF GROUP II METAL IONS FROM WASTEWATER
2. PHYSICO-CHEMICAL STUDY OF THE ADSORPTION PROPERTIES OF NATURAL MINERALS FOR SORPTION TREATMENT OF WASTEWATER FROM PB+2, NI+2, ZN+2 IONS
3. SPATIAL ASSESSMENT OF SOIL FERTILITY USING GIS AND REMOTE SENSING: A CASE STUDY OF SOUTHERN KAZAKHSTAN
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