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Item Sustainable Biochar for Water and Wastewater Treatment(Elsevier Inc. All rights reserved, 2022) Mohan, Dinesh (editor); Pittman Jr., Charles U.(editor); Mlsna, Todd E. (editor)This First Edition was motivated by the recent enormous growth in biochar research. From 2010 to the date this Preface was written, the Web of Science database shows 18,224 publica tions on biochar have appeared. This activity is accelerating. In 2010, 119 publications appeared. This grew to 3975 in 2020. By September 2021, 3588 biochar papers had already been counted for that year. The first use of biochar, as distinct from charcoal or activated carbon, for water remediation appeared in the Jour nal of Colloid and Interface Science in 2007 [JCIS, 310(1)2007, 57–73]. Fast pyrolysis by-product biochar obtained from biooil production in an auger-fed reactor was used to remove heavy metals from water. Following this publication, many reports on slow and fast pyrolysis biochar as a substitute for activated carbon in water purification have appeared. Previously, biochar had been used for soil enrichment and carbon sequestration.Item Application of biochar for the removal of actinides and lanthanides from aqueous solutions.(Elsevier Inc., 2022) Bursztyn, Amalia L. Fuentesa; Arwenyo, Beatrice; Nanney, Andie L.M.; Ramirez, Arissa; Jamison, Hailey; Venson, Beverly; Mohan, Dinesh; Mlsna, Todd E.; Navarathna, ChanakaActinides and lanthanides are elements with unfilled f orbitals and are collectively labeled as the inner transition elements (ITEs). The actinide series includes 15 radioactive metallic ele ments with atomic numbers 89–103 (Cooper, 2000). The actinide elements are classified as light (Ac, Th, Pa, U, Np, Pu, Am) or heavy (Cm, Bk, Cf, Es, Fm, Md, No, Lr) based on their atomic numbers. The actinides fill their 5f sublevels progressively and exhibit char acteristics of both the d-block and the f-block elements. Elements of the actinide series can have oxidation states from +2 to plus +7. In addition to being radioactive, all actinides are paramagnetic and pyrophoric. Except for actinium with one oxidation state of +3, the other actinides are known to show variable oxidation states and more than one crystalline phase. To date, only the first four elements in the actinide series have been found to occur naturally.