Adsorption Characteristics of Heavy Metals Pb<sup>2+</sup> and Zn<sup>2+</sup> by Magnetic Biochar Obtained from Modified AMD Sludge
Acid mine drainage (AMD) sludge can be used to prepare adsorbent materials for the removal of heavy metals in water, which is an effective means for its resource utilization. Magnetic modified biochar (MMB), which can be recovered by magnetic separation, was prepared from sludge generated from the c...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-07-01
|
| Series: | Toxics |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2305-6304/11/7/590 |
| _version_ | 1797587406651654144 |
|---|---|
| author | Xiaoting Long Ruixue Zhang Rong Rong Pan Wu Shiwan Chen Jipei Ao Li An Yuran Fu Huanhuan Xie |
| author_facet | Xiaoting Long Ruixue Zhang Rong Rong Pan Wu Shiwan Chen Jipei Ao Li An Yuran Fu Huanhuan Xie |
| author_sort | Xiaoting Long |
| collection | DOAJ |
| description | Acid mine drainage (AMD) sludge can be used to prepare adsorbent materials for the removal of heavy metals in water, which is an effective means for its resource utilization. Magnetic modified biochar (MMB), which can be recovered by magnetic separation, was prepared from sludge generated from the carbonate rock neutralization treatment of AMD and rice straw agricultural waste. Unmodified biochar (UMB) was obtained from rice straw and chemically modified and treated by ultraviolet radiation to produce MMB. The Pb<sup>2+</sup> and Zn<sup>2+</sup> adsorption capacities of UMB and MMB were investigated. Simultaneously, the materials were characterized by SEM, FTIR, BET, and ZETA. The results showed that the specific surface area (130.89 m<sup>2</sup>·g<sup>−1</sup>) and pore volume (0.22 m<sup>2</sup>·g<sup>−1</sup>) of MMB were significantly increased compared to those of UMB (9.10 m<sup>2</sup>·g<sup>−1</sup> and 0.05 m<sup>2</sup>·g<sup>−1</sup>, respectively). FTIR images showed that MMB was successfully loaded with Fe<sub>3</sub>O<sub>4</sub>. The adsorption process of Pb<sup>2+</sup> and Zn<sup>2+</sup> onto MMB was consistent with the Langmuir adsorption isotherm and second-order kinetic models, with maximum adsorption capacities of 329.65 mg·g<sup>−1</sup> and 103.67 mg·g<sup>−1</sup>, respectively. In a binary system of Pb<sup>2+</sup> and Zn<sup>2+</sup>, MMB preferentially binds Pb<sup>2+</sup>. The adsorption efficiencies of MMB reached >80% for Pb<sup>2+</sup> and Zn<sup>2+</sup>. |
| first_indexed | 2024-03-11T00:36:31Z |
| format | Article |
| id | doaj.art-c0e516a9ac2a4aa99181980e3169fdd3 |
| institution | Directory Open Access Journal |
| issn | 2305-6304 |
| language | English |
| last_indexed | 2024-03-11T00:36:31Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Toxics |
| spelling | doaj.art-c0e516a9ac2a4aa99181980e3169fdd32023-11-18T21:37:01ZengMDPI AGToxics2305-63042023-07-0111759010.3390/toxics11070590Adsorption Characteristics of Heavy Metals Pb<sup>2+</sup> and Zn<sup>2+</sup> by Magnetic Biochar Obtained from Modified AMD SludgeXiaoting Long0Ruixue Zhang1Rong Rong2Pan Wu3Shiwan Chen4Jipei Ao5Li An6Yuran Fu7Huanhuan Xie8College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, ChinaCollege of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, ChinaCollege of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, ChinaCollege of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, ChinaCollege of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, ChinaCollege of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, ChinaCollege of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, ChinaCollege of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, ChinaGuizhou Geological and Mineral Foundation Engineering Co., Ltd., Guiyang 550081, ChinaAcid mine drainage (AMD) sludge can be used to prepare adsorbent materials for the removal of heavy metals in water, which is an effective means for its resource utilization. Magnetic modified biochar (MMB), which can be recovered by magnetic separation, was prepared from sludge generated from the carbonate rock neutralization treatment of AMD and rice straw agricultural waste. Unmodified biochar (UMB) was obtained from rice straw and chemically modified and treated by ultraviolet radiation to produce MMB. The Pb<sup>2+</sup> and Zn<sup>2+</sup> adsorption capacities of UMB and MMB were investigated. Simultaneously, the materials were characterized by SEM, FTIR, BET, and ZETA. The results showed that the specific surface area (130.89 m<sup>2</sup>·g<sup>−1</sup>) and pore volume (0.22 m<sup>2</sup>·g<sup>−1</sup>) of MMB were significantly increased compared to those of UMB (9.10 m<sup>2</sup>·g<sup>−1</sup> and 0.05 m<sup>2</sup>·g<sup>−1</sup>, respectively). FTIR images showed that MMB was successfully loaded with Fe<sub>3</sub>O<sub>4</sub>. The adsorption process of Pb<sup>2+</sup> and Zn<sup>2+</sup> onto MMB was consistent with the Langmuir adsorption isotherm and second-order kinetic models, with maximum adsorption capacities of 329.65 mg·g<sup>−1</sup> and 103.67 mg·g<sup>−1</sup>, respectively. In a binary system of Pb<sup>2+</sup> and Zn<sup>2+</sup>, MMB preferentially binds Pb<sup>2+</sup>. The adsorption efficiencies of MMB reached >80% for Pb<sup>2+</sup> and Zn<sup>2+</sup>.https://www.mdpi.com/2305-6304/11/7/590AMD sludgemagnetic biocharheavy metalsadsorption mechanism |
| spellingShingle | Xiaoting Long Ruixue Zhang Rong Rong Pan Wu Shiwan Chen Jipei Ao Li An Yuran Fu Huanhuan Xie Adsorption Characteristics of Heavy Metals Pb<sup>2+</sup> and Zn<sup>2+</sup> by Magnetic Biochar Obtained from Modified AMD Sludge Toxics AMD sludge magnetic biochar heavy metals adsorption mechanism |
| title | Adsorption Characteristics of Heavy Metals Pb<sup>2+</sup> and Zn<sup>2+</sup> by Magnetic Biochar Obtained from Modified AMD Sludge |
| title_full | Adsorption Characteristics of Heavy Metals Pb<sup>2+</sup> and Zn<sup>2+</sup> by Magnetic Biochar Obtained from Modified AMD Sludge |
| title_fullStr | Adsorption Characteristics of Heavy Metals Pb<sup>2+</sup> and Zn<sup>2+</sup> by Magnetic Biochar Obtained from Modified AMD Sludge |
| title_full_unstemmed | Adsorption Characteristics of Heavy Metals Pb<sup>2+</sup> and Zn<sup>2+</sup> by Magnetic Biochar Obtained from Modified AMD Sludge |
| title_short | Adsorption Characteristics of Heavy Metals Pb<sup>2+</sup> and Zn<sup>2+</sup> by Magnetic Biochar Obtained from Modified AMD Sludge |
| title_sort | adsorption characteristics of heavy metals pb sup 2 sup and zn sup 2 sup by magnetic biochar obtained from modified amd sludge |
| topic | AMD sludge magnetic biochar heavy metals adsorption mechanism |
| url | https://www.mdpi.com/2305-6304/11/7/590 |
| work_keys_str_mv | AT xiaotinglong adsorptioncharacteristicsofheavymetalspbsup2supandznsup2supbymagneticbiocharobtainedfrommodifiedamdsludge AT ruixuezhang adsorptioncharacteristicsofheavymetalspbsup2supandznsup2supbymagneticbiocharobtainedfrommodifiedamdsludge AT rongrong adsorptioncharacteristicsofheavymetalspbsup2supandznsup2supbymagneticbiocharobtainedfrommodifiedamdsludge AT panwu adsorptioncharacteristicsofheavymetalspbsup2supandznsup2supbymagneticbiocharobtainedfrommodifiedamdsludge AT shiwanchen adsorptioncharacteristicsofheavymetalspbsup2supandznsup2supbymagneticbiocharobtainedfrommodifiedamdsludge AT jipeiao adsorptioncharacteristicsofheavymetalspbsup2supandznsup2supbymagneticbiocharobtainedfrommodifiedamdsludge AT lian adsorptioncharacteristicsofheavymetalspbsup2supandznsup2supbymagneticbiocharobtainedfrommodifiedamdsludge AT yuranfu adsorptioncharacteristicsofheavymetalspbsup2supandznsup2supbymagneticbiocharobtainedfrommodifiedamdsludge AT huanhuanxie adsorptioncharacteristicsofheavymetalspbsup2supandznsup2supbymagneticbiocharobtainedfrommodifiedamdsludge |