{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,14]],"date-time":"2026-10-14T12:43:34Z","timestamp":1791981814878,"version":"4.4.0"},"reference-count":44,"publisher":"MDPI AG","issue":"18","license":[{"start":{"date-parts":[[2022,9,6]],"date-time":"2022-09-06T00:00:00Z","timestamp":1662422400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Key-Area Research and Development Program of Guangdong Province","award":["2019B110207002"],"award-info":[{"award-number":["2019B110207002"]}]},{"name":"Key-Area Research and Development Program of Guangdong Province","award":["200106105876892"],"award-info":[{"award-number":["200106105876892"]}]},{"name":"Key-Area Research and Development Program of Guangdong Province","award":["190807115560881"],"award-info":[{"award-number":["190807115560881"]}]},{"name":"Key-Area Research and Development Program of Guangdong 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Technology Planning Project of Guangdong Province","award":["202002030177"],"award-info":[{"award-number":["202002030177"]}]},{"name":"Science and Technology Planning Project of Guangdong Province","award":["2021B1515020063"],"award-info":[{"award-number":["2021B1515020063"]}]},{"name":"Chemistry and Chemical Engineering Guangdong Laboratory","award":["2019B110207002"],"award-info":[{"award-number":["2019B110207002"]}]},{"name":"Chemistry and Chemical Engineering Guangdong Laboratory","award":["200106105876892"],"award-info":[{"award-number":["200106105876892"]}]},{"name":"Chemistry and Chemical Engineering Guangdong Laboratory","award":["190807115560881"],"award-info":[{"award-number":["190807115560881"]}]},{"name":"Chemistry and Chemical Engineering Guangdong Laboratory","award":["2032008"],"award-info":[{"award-number":["2032008"]}]},{"name":"Chemistry and Chemical Engineering Guangdong Laboratory","award":["202002030177"],"award-info":[{"award-number":["202002030177"]}]},{"name":"Chemistry and Chemical Engineering Guangdong Laboratory","award":["2021B1515020063"],"award-info":[{"award-number":["2021B1515020063"]}]},{"name":"Science and Technology Program of Guangzhou","award":["2019B110207002"],"award-info":[{"award-number":["2019B110207002"]}]},{"name":"Science and Technology Program of Guangzhou","award":["200106105876892"],"award-info":[{"award-number":["200106105876892"]}]},{"name":"Science and Technology Program of Guangzhou","award":["190807115560881"],"award-info":[{"award-number":["190807115560881"]}]},{"name":"Science and Technology Program of Guangzhou","award":["2032008"],"award-info":[{"award-number":["2032008"]}]},{"name":"Science and Technology Program of Guangzhou","award":["202002030177"],"award-info":[{"award-number":["202002030177"]}]},{"name":"Science and Technology Program of Guangzhou","award":["2021B1515020063"],"award-info":[{"award-number":["2021B1515020063"]}]},{"name":"Guangdong Basic and Applied Basic Research Foundation for Distinguished Young Scholars","award":["2019B110207002"],"award-info":[{"award-number":["2019B110207002"]}]},{"name":"Guangdong Basic and Applied Basic Research Foundation for Distinguished Young Scholars","award":["200106105876892"],"award-info":[{"award-number":["200106105876892"]}]},{"name":"Guangdong Basic and Applied Basic Research Foundation for Distinguished Young Scholars","award":["190807115560881"],"award-info":[{"award-number":["190807115560881"]}]},{"name":"Guangdong Basic and Applied Basic Research Foundation for Distinguished Young Scholars","award":["2032008"],"award-info":[{"award-number":["2032008"]}]},{"name":"Guangdong Basic and Applied Basic Research Foundation for Distinguished Young Scholars","award":["202002030177"],"award-info":[{"award-number":["202002030177"]}]},{"name":"Guangdong Basic and Applied Basic Research Foundation for Distinguished Young Scholars","award":["2021B1515020063"],"award-info":[{"award-number":["2021B1515020063"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJERPH"],"abstract":"<jats:p>The potential application of biochar in water treatment is attracting interest due to its sustainability and low production cost. In the present study, H3PO4-modified porous biochar (H-PBC), ethylenediaminetetraacetic acid-modified porous biochar (E-PBC), and NaOH-modified porous biochar (O-PBC) were prepared for Ni(II) and Pb(II) adsorption in an aqueous solution. Scanning electron microscopy (SEM), X-ray diffraction analysis (XRD), Brunauer\u2013Emmett\u2013Teller analysis (BET), and Fourier-transform infrared (FT-IR) spectroscopy were employed to characterize the as-obtained samples, and their capacities for Ni(II) and Pb(II) adsorption were determined. SEM showed that H-PBC retained the hierarchical porous structure of pristine biochar. FT-IR showed that H-PBC possessed abundant oxygen-containing and phosphorus-containing functional groups on the surface. BET analysis demonstrated that the surface areas of H-PBC (344.17 m2\/g) was higher than O-PBC (3.66 m2\/g), and E-PBC (1.64 m2\/g), respectively. H-PBC, E-PBC, and O-PBC all exhibited excellent performance at Ni(II) and Pb(II) adsorption with maximum adsorption capacity of 64.94 mg\/g, 47.17 mg\/g, and 60.24 mg\/g, and 243.90 mg\/g, 156.25 mg\/g, and 192.31 mg\/g, respectively, which were significantly higher than the adsorption capacity (19.80 mg\/g and 38.31 mg\/g) of porous biochar (PBC). Pseudo-second order models suggested that the adsorption process was controlled by chemical adsorption. After three regeneration cycles, the Ni(II) and Pb(II) removal efficiency with H-PBC were still 49.8% and 56.3%. The results obtained in this study suggest that H-PBC is a promising adsorbent for the removal of heavy metals from aqueous solutions.<\/jats:p>","DOI":"10.3390\/ijerph191811163","type":"journal-article","created":{"date-parts":[[2022,9,6]],"date-time":"2022-09-06T20:52:51Z","timestamp":1662497571000},"page":"11163","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":27,"title":["Comparative Study of Biochar Modified with Different Functional Groups for Efficient Removal of Pb(II) and Ni(II)"],"prefix":"10.3390","volume":"19","author":[{"given":"Chengcheng","family":"Liu","sequence":"first","affiliation":[{"name":"School of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiaxin","family":"Lin","sequence":"additional","affiliation":[{"name":"School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China"},{"name":"Synergy Innovation Institute of GDUT, Shantou 515041, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Haojia","family":"Chen","sequence":"additional","affiliation":[{"name":"School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China"},{"name":"Synergy Innovation Institute of GDUT, Shantou 515041, China"},{"name":"Chemistry and Chemical Engineering Guangdong Laboratory, Shantou 515041, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1193-1030","authenticated-orcid":false,"given":"Wanjun","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China"},{"name":"Synergy Innovation Institute of GDUT, Shantou 515041, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9592-8327","authenticated-orcid":false,"given":"Yan","family":"Yang","sequence":"additional","affiliation":[{"name":"School of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, China"},{"name":"School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China"},{"name":"Synergy Innovation Institute of GDUT, Shantou 515041, China"},{"name":"Chemistry and Chemical Engineering Guangdong Laboratory, Shantou 515041, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,9,6]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"67","DOI":"10.1016\/j.biortech.2014.01.068","article-title":"A comprehensive review on biosorption of heavy metals by algal biomass: Materials, performances, chemistry, and modeling simulation tools","volume":"160","author":"He","year":"2014","journal-title":"Bioresour. 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