Lucas Meili, is working as Full Professor in the Center of Technology at Federal University of Alagoas (UFAL), Maceió, Alagoas, Brazil. Prof. Meili graduated in Chemical Engineering at Federal University of Rio Grande (Brazil) and obtained his Doctor degree in Chemical Engineering at Federal University of São Carlos (Brazil) in 2009. He is permanent member of Chemical Engineering post-graduation program and also of Materials post-graduation program. His areas of interest are focused in separation processes, water and wastewater treatment, and synthesis of materials. Particularly he has interest in adsorption and advanced oxidation processes. He has several international publications in Chemical Engineering, focusing in adsorption, development of adsorbents and advanced oxidation processes.Guilherme Luiz Dotto is professor in Chemical Engineering Department at Federal University of Santa Maria (UFSM). Is a permanent member of the Chemical Engineering post-graduation program and also of the Chemistry post-graduation program. Is B.Sc. in Food Engineering, M.Sc. in Food Engineering and Ph.D. in Food Engineering. His research is focused on the following areas: transport phenomena, unit operations, wastewater treatment, physicochemical treatments for wastewater and separation processes. In specific, has specialty in adsorption/biosorption of contaminants from aqueous solutions, preparation and characterization of biomaterials and nanobiomaterials, wastewater treatment, wastes management and reuse, drying of biomaterials, statistical optimization, experimental design, response surface methodology, linear and non-linear regression analysis. In these research areas, has more than 160 published articles and is reviewer of more than 100 international journals. Its H-index is 25.

• Preface.- Chapter 1 Fundamentals of Adsorption.- Chapter 2 Methods of Synthesis of Magnetic Adsorbents.- Chapter 3 Magnetic Biosorbents and their Application in Water Remediation.- Chapter 4 Lignocellulosic Wastes as Precursor of carbonaceous magnetic adsorbents of organic and inorganic pollutants adsorption.- Chapter 5 Magnetic Biochar Fibers for Copper Removal.- Chapter 6 Treatment of Landfill Leachate with Magnetic Adsorbents.- Chapter 7 Removal of Emerging Pollutants and Toxic Metals using Magnetic Adsorbents.- Chapter 8 Magnetically Modified Biological Materials for Dyes Removal.- Chapter 9 Regeneration of magnetic adsorbents saturated by organic pollutants using advanced oxidation technologies.- Chapter 10 Magnetic Nanofibers for Contaminants Removal from Water.- Chapter 11 Magnetic solid phase-based sorbents for isolation/pre-concentration and removal of pesticides.- Chapter 12 Characterization and application of Fe-magnetic materials and nanomaterials for application in the aqueous matrices decontamination.- Chapter 13 Advanced Magnetic Adsorbents Prepared from Emulsion Template for Water Treatment.- Chapter 14 Chitosan Based Magnetic Adsorbents.- Chapter 15 Methods used for performance enhancement of iron based magnetic adsorbents in water systems.