Hui Liu, Chen Li, Zhichao Fan, Zhirui Dou, Beibei Lu, Xiao Fan, Xiaohui Ji, Jinlong Lai, Qian Fu, Songlin Gong, Xinna Wang, Jie Liu
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Synergistic Enhancement of Cobalt Adsorption by Graphitization and Magnetic Modification of Biochar: Synthesis, Characterization, Performance and Mechanism
Synergistic enhancement of cobalt adsorption was achieved through graphitization and magnetic modification of biochar derived from spent mushroom substrate (SMS). The Magnetic graphitized biochar, designated MGBC, was synthesized via a one-step iron-assisted pyrolysis process. Optimal performance occurred at 900 °C (MGBC-900), exhibiting an enhanced graphitic carbon structure with an ID/IG ratio of 2.11 and Magnetite loading of 13.80 emu·g⁻1. These properties contributed to a high specific surface area of 340 m2·g⁻1 and hydrophilicity reflected by a 32° contact angle. Performance evaluation demonstrated exceptional cobalt adsorption capacity of 138.97 mg·g⁻1 and 99.10% removal efficiency for low-concentration Co2+ solutions (6.981 mg·L⁻1), surpassing conventional biochars. The adsorption mechanism involved three synergistic pathways: π-π electron donor–acceptor interactions with graphitic layers, electrostatic attraction to protonated functional groups, and monodentate complexation with Fe–O sites. The practical applicability of MGBC-900 was further assessed through regeneration cycles, resistance to coexisting ions, and performance in simulated electroplating wastewater (SIW).
期刊介绍：
Water, Air, & Soil Pollution is an international, interdisciplinary journal on all aspects of pollution and solutions to pollution in the biosphere. This includes chemical, physical and biological processes affecting flora, fauna, water, air and soil in relation to environmental pollution. Because of its scope, the subject areas are diverse and include all aspects of pollution sources, transport, deposition, accumulation, acid precipitation, atmospheric pollution, metals, aquatic pollution including marine pollution and ground water, waste water, pesticides, soil pollution, sewage, sediment pollution, forestry pollution, effects of pollutants on humans, vegetation, fish, aquatic species, micro-organisms, and animals, environmental and molecular toxicology applied to pollution research, biosensors, global and climate change, ecological implications of pollution and pollution models. Water, Air, & Soil Pollution also publishes manuscripts on novel methods used in the study of environmental pollutants, environmental toxicology, environmental biology, novel environmental engineering related to pollution, biodiversity as influenced by pollution, novel environmental biotechnology as applied to pollution (e.g. bioremediation), environmental modelling and biorestoration of polluted environments.
Articles should not be submitted that are of local interest only and do not advance international knowledge in environmental pollution and solutions to pollution. Articles that simply replicate known knowledge or techniques while researching a local pollution problem will normally be rejected without review. Submitted articles must have up-to-date references, employ the correct experimental replication and statistical analysis, where needed and contain a significant contribution to new knowledge. The publishing and editorial team sincerely appreciate your cooperation.
Water, Air, & Soil Pollution publishes research papers; review articles; mini-reviews; and book reviews.
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