Biomass facilitated phase transformation of natural hematite at high temperatures and sorption of Cd2+ and Cu2+
Phase changes of natural hematite are often practiced to improve heavy metal removal and magnetism for easy recycling. In this work, pinewood biomass (PB) and natural hematite (H) admixtures were pyrolyzed at 300, 450 and 600 °C under N2 environment to prepare HBC nanocomposites (HBC300, HBC450 and...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2019-03-01
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| Series: | Environment International |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0160412018320440 |
| _version_ | 1818450188093620224 |
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| author | Shengsen Wang Mingyue Zhao Min Zhou Yiting Zhao Yuncong C. Li Bin Gao Ke Feng Weiqin Yin Yong Sik Ok Xiaozhi Wang |
| author_facet | Shengsen Wang Mingyue Zhao Min Zhou Yiting Zhao Yuncong C. Li Bin Gao Ke Feng Weiqin Yin Yong Sik Ok Xiaozhi Wang |
| author_sort | Shengsen Wang |
| collection | DOAJ |
| description | Phase changes of natural hematite are often practiced to improve heavy metal removal and magnetism for easy recycling. In this work, pinewood biomass (PB) and natural hematite (H) admixtures were pyrolyzed at 300, 450 and 600 °C under N2 environment to prepare HBC nanocomposites (HBC300, HBC450 and HBC600). The X-ray diffraction (XRD) confirmed the reductive transformation of hematite (crystallite size ≈ 47 nm) into magnetite (25 nm) and further to wustite (25 nm) and zerovalent iron (48 nm). The Langmuir isotherms showed that the maximum sorption capacities of HBC300, HBC450, and HBC600 were 173, 138, and 130 mmol kg−1 for Cd2+, and 359, 172, and 197 mmol kg−1 for Cu2+, respectively. The higher pH up to 5 increased sorption of both Cd2+ and Cu2+, whereas the higher ionic strength (0.05–0.4 M) decreased Cd2+ sorption. Sorption of Cd2+ and Cu2+ by HBC300 was accompanied by one order of magnitude greater cation release than HBC450 and HBC600. In a binary system, Cd2+ sorption was depressed by over four times in presence of Cu2+. Overall, ion exchange was more pronounced for HBC300, and Cu2+ was more favorably retained by specific sorption than Cd2+. The greater magnetism of HBC nanoparticles favors separation from aqueous solutions. Keywords: Heavy metals, Pyrolysis, Iron oxide, Reduction, Ion exchange, Water and wastewater treatment |
| first_indexed | 2024-12-14T20:47:20Z |
| format | Article |
| id | doaj.art-9af13d8974ba41d692bcd3e5c2dd6555 |
| institution | Directory Open Access Journal |
| issn | 0160-4120 |
| language | English |
| last_indexed | 2024-12-14T20:47:20Z |
| publishDate | 2019-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Environment International |
| spelling | doaj.art-9af13d8974ba41d692bcd3e5c2dd65552022-12-21T22:47:58ZengElsevierEnvironment International0160-41202019-03-01124473481Biomass facilitated phase transformation of natural hematite at high temperatures and sorption of Cd2+ and Cu2+Shengsen Wang0Mingyue Zhao1Min Zhou2Yiting Zhao3Yuncong C. Li4Bin Gao5Ke Feng6Weiqin Yin7Yong Sik Ok8Xiaozhi Wang9College of Environmental Science and Engineering, Yangzhou University, Yangzhou, 225127, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangdong, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, ChinaCollege of Environmental Science and Engineering, Yangzhou University, Yangzhou, 225127, ChinaCollege of Environmental Science and Engineering, Yangzhou University, Yangzhou, 225127, ChinaCollege of Environmental Science and Engineering, Yangzhou University, Yangzhou, 225127, ChinaCollege of Environmental Science and Engineering, Yangzhou University, Yangzhou, 225127, China; Soil and Water Sciences Department, Tropical Research and Education Center, IFAS, University of Florida, Homestead, FL 33031, United States of AmericaDepartment of Agricultural and Biological Engineering, University of Florida, Gainesville, FL 32611, United States of AmericaCollege of Environmental Science and Engineering, Yangzhou University, Yangzhou, 225127, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, ChinaCollege of Environmental Science and Engineering, Yangzhou University, Yangzhou, 225127, ChinaKorea Biochar Research Center & Division of Environmental Science and Ecological Engineering, Korea University, Seoul, 02841, Republic of Korea; Correspondence to: Y.S. Ok, Division of Environmental Science and Ecological Engineering, Korea University, Seoul, 02841, Republic of KoreaCollege of Environmental Science and Engineering, Yangzhou University, Yangzhou, 225127, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, China; Correspondence to: X. Wang, College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China.Phase changes of natural hematite are often practiced to improve heavy metal removal and magnetism for easy recycling. In this work, pinewood biomass (PB) and natural hematite (H) admixtures were pyrolyzed at 300, 450 and 600 °C under N2 environment to prepare HBC nanocomposites (HBC300, HBC450 and HBC600). The X-ray diffraction (XRD) confirmed the reductive transformation of hematite (crystallite size ≈ 47 nm) into magnetite (25 nm) and further to wustite (25 nm) and zerovalent iron (48 nm). The Langmuir isotherms showed that the maximum sorption capacities of HBC300, HBC450, and HBC600 were 173, 138, and 130 mmol kg−1 for Cd2+, and 359, 172, and 197 mmol kg−1 for Cu2+, respectively. The higher pH up to 5 increased sorption of both Cd2+ and Cu2+, whereas the higher ionic strength (0.05–0.4 M) decreased Cd2+ sorption. Sorption of Cd2+ and Cu2+ by HBC300 was accompanied by one order of magnitude greater cation release than HBC450 and HBC600. In a binary system, Cd2+ sorption was depressed by over four times in presence of Cu2+. Overall, ion exchange was more pronounced for HBC300, and Cu2+ was more favorably retained by specific sorption than Cd2+. The greater magnetism of HBC nanoparticles favors separation from aqueous solutions. Keywords: Heavy metals, Pyrolysis, Iron oxide, Reduction, Ion exchange, Water and wastewater treatmenthttp://www.sciencedirect.com/science/article/pii/S0160412018320440 |
| spellingShingle | Shengsen Wang Mingyue Zhao Min Zhou Yiting Zhao Yuncong C. Li Bin Gao Ke Feng Weiqin Yin Yong Sik Ok Xiaozhi Wang Biomass facilitated phase transformation of natural hematite at high temperatures and sorption of Cd2+ and Cu2+ Environment International |
| title | Biomass facilitated phase transformation of natural hematite at high temperatures and sorption of Cd2+ and Cu2+ |
| title_full | Biomass facilitated phase transformation of natural hematite at high temperatures and sorption of Cd2+ and Cu2+ |
| title_fullStr | Biomass facilitated phase transformation of natural hematite at high temperatures and sorption of Cd2+ and Cu2+ |
| title_full_unstemmed | Biomass facilitated phase transformation of natural hematite at high temperatures and sorption of Cd2+ and Cu2+ |
| title_short | Biomass facilitated phase transformation of natural hematite at high temperatures and sorption of Cd2+ and Cu2+ |
| title_sort | biomass facilitated phase transformation of natural hematite at high temperatures and sorption of cd2 and cu2 |
| url | http://www.sciencedirect.com/science/article/pii/S0160412018320440 |
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