{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,14]],"date-time":"2026-10-14T10:43:33Z","timestamp":1791974613071,"version":"4.4.0"},"reference-count":56,"publisher":"MDPI AG","issue":"15","license":[{"start":{"date-parts":[[2020,7,29]],"date-time":"2020-07-29T00:00:00Z","timestamp":1595980800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"the National Key R&amp;D Program of China","award":["2018YFC0506901"],"award-info":[{"award-number":["2018YFC0506901"]}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["21677046"],"award-info":[{"award-number":["21677046"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003787","name":"Natural Science Foundation of Hebei Province","doi-asserted-by":"publisher","award":["B2017205146"],"award-info":[{"award-number":["B2017205146"]}],"id":[{"id":"10.13039\/501100003787","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecules"],"abstract":"<jats:p>A series of the magnetic CuFe2O4-loaded corncob biochar (CuFe2O4@CCBC) materials was obtained by combining the two-step impregnation of the corncob biochar with the pyrolysis of oxalate. CuFe2O4@CCBC and the pristine corncob biochar (CCBC) were characterized using XRD, SEM, VSM, BET, as well as pHZPC measurements. The results revealed that CuFe2O4 had a face-centered cubic crystalline phase and was homogeneously coated on the surface of CCBC. The as-prepared CuFe2O4@CCBC(5%) demonstrated a specific surface area of 74.98 m2\u00b7g\u22121, saturation magnetization of 5.75 emu\u00b7g\u22121 and pHZPC of 7.0. The adsorption dynamics and thermodynamic behavior of Pb(II) on CuFe2O4@CCBC and CCBC were investigated. The findings indicated that the pseudo-second kinetic and Langmuir equations suitably fitted the Pb(II) adsorption by CuFe2O4@CCBC or CCBC. At 30 \u00b0C and pH = 5.0, CuFe2O4@CCBC(5%) displayed an excellent performance in terms of the process rate and adsorption capacity towards Pb(II), for which the theoretical rate constant (k2) and maximum adsorption capacity (qm) were 7.68 \u00d7 10\u22123 g\u00b7mg\u22121\u00b7\u00b7min\u22121 and 132.10 mg\u00b7g\u22121 separately, which were obviously higher than those of CCBC (4.38 \u00d7 10\u22123 g\u00b7mg\u22121\u00b7min\u22121 and 15.66 mg\u00b7g\u22121). The thermodynamic analyses exhibited that the adsorption reaction of the materials was endothermic and entropy-driven. The XPS and FTIR results revealed that the removal mechanism could be mainly attributed to the replacement of Pb2+ for H+ in Fe\/Cu\u2013OH and \u2013COOH to form the inner surface complexes. Overall, the magnetic CuFe2O4-loaded biochar presents a high potential for use as an eco-friendly adsorbent to eliminate the heavy metals from the wastewater streams.<\/jats:p>","DOI":"10.3390\/molecules25153456","type":"journal-article","created":{"date-parts":[[2020,7,30]],"date-time":"2020-07-30T12:15:38Z","timestamp":1596111338000},"page":"3456","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":42,"title":["Study on the Adsorption of CuFe2O4-Loaded Corncob Biochar for Pb(II)"],"prefix":"10.3390","volume":"25","author":[{"given":"Tianci","family":"Zhao","sequence":"first","affiliation":[{"name":"College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang 050024, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaolong","family":"Ma","sequence":"additional","affiliation":[{"name":"School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hao","family":"Cai","sequence":"additional","affiliation":[{"name":"College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang 050024, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7998-1088","authenticated-orcid":false,"given":"Zichuan","family":"Ma","sequence":"additional","affiliation":[{"name":"College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang 050024, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Huifeng","family":"Liang","sequence":"additional","affiliation":[{"name":"College of Chemistry and Chemical Engineering, Xingtai University, Xingtai 054001, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2020,7,29]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"8244","DOI":"10.1007\/s11356-016-6333-x","article-title":"A review of toxicity and mechanisms of individual and mixtures of heavy metals in the environment","volume":"23","author":"Wu","year":"2016","journal-title":"Environ. 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