{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,16]],"date-time":"2026-10-16T16:30:18Z","timestamp":1792168218544,"version":"4.4.0"},"reference-count":52,"publisher":"MDPI AG","issue":"14","license":[{"start":{"date-parts":[[2022,7,10]],"date-time":"2022-07-10T00:00:00Z","timestamp":1657411200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Key Research and Development Program of Hunan Province","award":["2021NK2027"],"award-info":[{"award-number":["2021NK2027"]}]},{"name":"Key Research and Development Program of Hunan Province","award":["2021JJ31159"],"award-info":[{"award-number":["2021JJ31159"]}]},{"name":"Key Research and Development Program of Hunan Province","award":["2019TJ-N05"],"award-info":[{"award-number":["2019TJ-N05"]}]},{"name":"Natural Science Foundation of Hunan Province","award":["2021NK2027"],"award-info":[{"award-number":["2021NK2027"]}]},{"name":"Natural Science Foundation of Hunan Province","award":["2021JJ31159"],"award-info":[{"award-number":["2021JJ31159"]}]},{"name":"Natural Science Foundation of Hunan Province","award":["2019TJ-N05"],"award-info":[{"award-number":["2019TJ-N05"]}]},{"name":"Science and Technology Talent Support Project of Hunan Province","award":["2021NK2027"],"award-info":[{"award-number":["2021NK2027"]}]},{"name":"Science and Technology Talent Support Project of Hunan Province","award":["2021JJ31159"],"award-info":[{"award-number":["2021JJ31159"]}]},{"name":"Science and Technology Talent Support Project of Hunan Province","award":["2019TJ-N05"],"award-info":[{"award-number":["2019TJ-N05"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJERPH"],"abstract":"<jats:p>This study prepared iron-manganese oxide-modified biochar (FM-BC) by impregnating rice straw biochar (BC) with a mixed solution of ferric nitrate and potassium permanganate. The effects of pH, FM-BC dosage, interference of coexisting ions, adsorption time, incipient Pb(II) concentration, and temperature on the adsorption of Pb(II) by FM-BC were investigated. Moreover, the Pb(II) adsorption mechanism of FM-BC was analyzed using a series of characterization techniques. The results showed that the Fe-Mn oxide composite modification significantly promoted the physical and chemical functions of the biochar surface and the adsorption capacity of Pb(II). The specific surface area of FM-BC was 18.20 times larger than that of BC, and the maximum Pb(II) adsorption capacity reached 165.88 mg\/g. Adsorption kinetic tests showed that the adsorption of Pb(II) by FM-BC was based on the pseudo-second-order kinetic model, which indicated that the adsorption process was mainly governed by chemical adsorption. The isothermal adsorption of Pb(II) by FM-BC conformed to the Langmuir model, indicating that the adsorption process was spontaneous and endothermic. Characterization analyses (Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy) showed that the adsorption mechanism of Pb(II) by FM-BC was mainly via electrostatic adsorption, chemical precipitation, complexation, ion exchange, and the transformation of Mn2O3 into MnO2. Therefore, FM-BC is a promising adsorbent for Pb(II) removal from wastewater.<\/jats:p>","DOI":"10.3390\/ijerph19148420","type":"journal-article","created":{"date-parts":[[2022,7,10]],"date-time":"2022-07-10T22:48:00Z","timestamp":1657493280000},"page":"8420","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":44,"title":["Adsorption Characteristics and Mechanisms of Fe-Mn Oxide Modified Biochar for Pb(II) in Wastewater"],"prefix":"10.3390","volume":"19","author":[{"given":"Shang-Feng","family":"Tang","sequence":"first","affiliation":[{"name":"College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hang","family":"Zhou","sequence":"additional","affiliation":[{"name":"College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China"},{"name":"Hunan Engineering Laboratory for Control of Rice Quality and Safety, Changsha 410004, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wen-Tao","family":"Tan","sequence":"additional","affiliation":[{"name":"College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jun-Guo","family":"Huang","sequence":"additional","affiliation":[{"name":"College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6000-544X","authenticated-orcid":false,"given":"Peng","family":"Zeng","sequence":"additional","affiliation":[{"name":"College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China"},{"name":"Hunan Engineering Laboratory for Control of Rice Quality and Safety, Changsha 410004, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiao-Feng","family":"Gu","sequence":"additional","affiliation":[{"name":"College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China"},{"name":"Hunan Engineering Laboratory for Control of Rice Quality and Safety, Changsha 410004, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bo-Han","family":"Liao","sequence":"additional","affiliation":[{"name":"College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China"},{"name":"Hunan Engineering Laboratory for Control of Rice Quality and Safety, Changsha 410004, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,7,10]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"151","DOI":"10.1016\/j.watres.2015.11.053","article-title":"A highly efficient polyampholyte hydrogel sorbent based fixed-bed process for heavy metal removal in actual industrial effluent","volume":"89","author":"Zhou","year":"2016","journal-title":"Water Res."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"25362","DOI":"10.1021\/acsami.5b07723","article-title":"Core-shell ferromagnetic nanorod based on amine polymer composite (Fe3O4@DAPF) for fast removal of Pb(II) from aqueous solutions","volume":"7","author":"Venkateswarlu","year":"2015","journal-title":"ACS Appl. 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