Aquatic/water/Surface Chemistry; Climate change mitigation: Carbon sequestration;\r\nWater/wastewater monitoring, assessment, modeling and remediation using physicochemical treatment methods; Development of sustainable adsorbents/sorbents/magnetic adsorbents/nanosorbents/hybrid adsorbents for the remediation of emerging contaminants; Biorenewable Resources: Bio-oils (bio fuels) and Biochars, Bio-oils fractionation, Biorefineries; Development of Biochar/Engineered biochar/Nanobiochar for Water Purification/filtration, Soil fertility/Management, Food Security and Climate Change Mitigation; Soil remediation/immobilization; Acid mine drainage (AMD) treatment and control;\r\nDevelopment of environmentally friendly wood preservatives; Deinking of pulp and paper