Removal of Antimony(V) from Drinking Water Using nZVI/AC: Optimization of Batch and Fix Bed Conditions
Antimony (Sb) traces in water pose a serious threat to human health due to their negative effects. In this work, nanoscale zero-valent iron (Fe<sup>0</sup>) supported on activated carbon (nZVI) was employed for eliminating Sb(V) from the drinking water. To better understand the overall p...
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MDPI AG
2021-10-01
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| author | Huijie Zhu Qiang Huang Shuai Fu Xiuji Zhang Zhe Yang Jianhong Lu Bo Liu Mingyan Shi Junjie Zhang Xiaoping Wen Junlong Li |
| author_facet | Huijie Zhu Qiang Huang Shuai Fu Xiuji Zhang Zhe Yang Jianhong Lu Bo Liu Mingyan Shi Junjie Zhang Xiaoping Wen Junlong Li |
| author_sort | Huijie Zhu |
| collection | DOAJ |
| description | Antimony (Sb) traces in water pose a serious threat to human health due to their negative effects. In this work, nanoscale zero-valent iron (Fe<sup>0</sup>) supported on activated carbon (nZVI) was employed for eliminating Sb(V) from the drinking water. To better understand the overall process, the effects of several experimental variables, including pH, dissolved oxygen (DO), coexisting ions, and adsorption kinetics on the removal of Sb(V) from the SW were investigated by employing fixed-bed column runs or batch-adsorption methods. A pH of 4.5 and 72 h of equilibrium time were found to be the ideal conditions for drinking water. The presence of phosphate (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mrow><mi>PO</mi></mrow><mn>4</mn><mrow><mn>3</mn><mo>−</mo></mrow></msubsup></mrow></semantics></math></inline-formula>), silicate (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mrow><mi>SiO</mi></mrow><mn>4</mn><mrow><mn>2</mn><mo>−</mo></mrow></msubsup></mrow></semantics></math></inline-formula>), chromate (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mrow><mi>CrO</mi></mrow><mn>4</mn><mrow><mn>2</mn><mo>−</mo></mrow></msubsup></mrow></semantics></math></inline-formula>) and arsenate (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mrow><mi>AsO</mi></mrow><mn>4</mn><mrow><mn>3</mn><mo>−</mo></mrow></msubsup></mrow></semantics></math></inline-formula>) significantly decreased the rate of Sb(V) removal, while humic acid and other anions exhibited a negligible effect. The capacity for Sb(V) uptake decreased from 6.665 to 2.433 mg when the flow rate was increased from 5 to 10 mL·min<sup>−1</sup>. The dynamic adsorption penetration curves of Sb(V) were 116.4% and 144.1% with the weak magnetic field (WMF) in fixed-bed column runs. Considering the removal rate of Sb(V), reusability, operability, no release of Sb(V) after being incorporated into the iron (hydr)oxides structure, it can be concluded that WMF coupled with ZVI would be an effective Sb(V) immobilization technology for drinking water. |
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| spelling | doaj.art-ed953acf5525417aa528dc87343c38ae2023-11-22T20:12:39ZengMDPI AGToxics2305-63042021-10-0191026610.3390/toxics9100266Removal of Antimony(V) from Drinking Water Using nZVI/AC: Optimization of Batch and Fix Bed ConditionsHuijie Zhu0Qiang Huang1Shuai Fu2Xiuji Zhang3Zhe Yang4Jianhong Lu5Bo Liu6Mingyan Shi7Junjie Zhang8Xiaoping Wen9Junlong Li10Henan International Joint Laboratory of New Civil Engineering Structure, College of Civil Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, ChinaHenan International Joint Laboratory of New Civil Engineering Structure, College of Civil Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, ChinaHenan International Joint Laboratory of New Civil Engineering Structure, College of Civil Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, ChinaHenan International Joint Laboratory of New Civil Engineering Structure, College of Civil Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, ChinaHenan International Joint Laboratory of New Civil Engineering Structure, College of Civil Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, ChinaSchool of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power (NCWU), Zhengzhou 450046, ChinaLaboratory of Functional Molecular and Materials, School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo 255000, ChinaCollege of Civil Engineering, Guangzhou University, Guangzhou 510006, ChinaHenan International Joint Laboratory of New Civil Engineering Structure, College of Civil Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, ChinaHenan International Joint Laboratory of New Civil Engineering Structure, College of Civil Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, ChinaHenan International Joint Laboratory of New Civil Engineering Structure, College of Civil Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, ChinaAntimony (Sb) traces in water pose a serious threat to human health due to their negative effects. In this work, nanoscale zero-valent iron (Fe<sup>0</sup>) supported on activated carbon (nZVI) was employed for eliminating Sb(V) from the drinking water. To better understand the overall process, the effects of several experimental variables, including pH, dissolved oxygen (DO), coexisting ions, and adsorption kinetics on the removal of Sb(V) from the SW were investigated by employing fixed-bed column runs or batch-adsorption methods. A pH of 4.5 and 72 h of equilibrium time were found to be the ideal conditions for drinking water. The presence of phosphate (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mrow><mi>PO</mi></mrow><mn>4</mn><mrow><mn>3</mn><mo>−</mo></mrow></msubsup></mrow></semantics></math></inline-formula>), silicate (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mrow><mi>SiO</mi></mrow><mn>4</mn><mrow><mn>2</mn><mo>−</mo></mrow></msubsup></mrow></semantics></math></inline-formula>), chromate (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mrow><mi>CrO</mi></mrow><mn>4</mn><mrow><mn>2</mn><mo>−</mo></mrow></msubsup></mrow></semantics></math></inline-formula>) and arsenate (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mrow><mi>AsO</mi></mrow><mn>4</mn><mrow><mn>3</mn><mo>−</mo></mrow></msubsup></mrow></semantics></math></inline-formula>) significantly decreased the rate of Sb(V) removal, while humic acid and other anions exhibited a negligible effect. The capacity for Sb(V) uptake decreased from 6.665 to 2.433 mg when the flow rate was increased from 5 to 10 mL·min<sup>−1</sup>. The dynamic adsorption penetration curves of Sb(V) were 116.4% and 144.1% with the weak magnetic field (WMF) in fixed-bed column runs. Considering the removal rate of Sb(V), reusability, operability, no release of Sb(V) after being incorporated into the iron (hydr)oxides structure, it can be concluded that WMF coupled with ZVI would be an effective Sb(V) immobilization technology for drinking water.https://www.mdpi.com/2305-6304/9/10/266active carbon-supported nano-zero-valent iron(nZVI/AC)Antimonate(Sb(V))adsorptionmodelingmechanism |
| spellingShingle | Huijie Zhu Qiang Huang Shuai Fu Xiuji Zhang Zhe Yang Jianhong Lu Bo Liu Mingyan Shi Junjie Zhang Xiaoping Wen Junlong Li Removal of Antimony(V) from Drinking Water Using nZVI/AC: Optimization of Batch and Fix Bed Conditions Toxics active carbon-supported nano-zero-valent iron(nZVI/AC) Antimonate(Sb(V)) adsorption modeling mechanism |
| title | Removal of Antimony(V) from Drinking Water Using nZVI/AC: Optimization of Batch and Fix Bed Conditions |
| title_full | Removal of Antimony(V) from Drinking Water Using nZVI/AC: Optimization of Batch and Fix Bed Conditions |
| title_fullStr | Removal of Antimony(V) from Drinking Water Using nZVI/AC: Optimization of Batch and Fix Bed Conditions |
| title_full_unstemmed | Removal of Antimony(V) from Drinking Water Using nZVI/AC: Optimization of Batch and Fix Bed Conditions |
| title_short | Removal of Antimony(V) from Drinking Water Using nZVI/AC: Optimization of Batch and Fix Bed Conditions |
| title_sort | removal of antimony v from drinking water using nzvi ac optimization of batch and fix bed conditions |
| topic | active carbon-supported nano-zero-valent iron(nZVI/AC) Antimonate(Sb(V)) adsorption modeling mechanism |
| url | https://www.mdpi.com/2305-6304/9/10/266 |
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