Cargando…
In Situ Synthesis of Carbon Nanotube–Steel Slag Composite for Pb(II) and Cu(II) Removal from Aqueous Solution
Methods and materials that effectively remove heavy metals, such as lead and copper, from wastewater are urgently needed. In this study, steel slag, a low-cost byproduct of steel manufacturing, was utilized as a substrate material for carbon nanotube (CNT) growth by chemical vapor deposition (CVD) t...
Autores principales: | , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9000475/ https://www.ncbi.nlm.nih.gov/pubmed/35407318 http://dx.doi.org/10.3390/nano12071199 |
_version_ | 1784685444614586368 |
---|---|
author | Yang, Pengfei Li, Fangxian Wang, Beihan Niu, Yanfei Wei, Jiangxiong Yu, Qijun |
author_facet | Yang, Pengfei Li, Fangxian Wang, Beihan Niu, Yanfei Wei, Jiangxiong Yu, Qijun |
author_sort | Yang, Pengfei |
collection | PubMed |
description | Methods and materials that effectively remove heavy metals, such as lead and copper, from wastewater are urgently needed. In this study, steel slag, a low-cost byproduct of steel manufacturing, was utilized as a substrate material for carbon nanotube (CNT) growth by chemical vapor deposition (CVD) to produce a new kind of efficient and low-cost absorbent without any pretreatment. The synthesis parameters of the developed CNT–steel slag composite (SS@CNTs) were optimized, and its adsorption capacities for Pb(II) and Cu(II) were evaluated. The results showed that the optimal growth time, synthesis temperature and acetylene flow rate were 45 min, 600 °C and 200 sccm (standard cubic centimeter per minute), respectively. The SS@CNTs composite had a high adsorption capacity with a maximum removal amount of 427.26 mg·g(−1) for Pb(II) and 132.79 mg·g(−1) for Cu(II). The adsorption proceeded rapidly during the first 15 min of adsorption and reached equilibrium at approximately 90 min. The adsorption processes were in accordance with the isotherms of the Langmuir model and the pseudo-second-order model, while the adsorption thermodynamics results indicated that the removal for both metals was an endothermic and spontaneous process. This study showed that compared with other adsorbent materials, the SS@CNTs composite is an efficient and low-cost adsorbent for heavy metals such as lead and copper. |
format | Online Article Text |
id | pubmed-9000475 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-90004752022-04-12 In Situ Synthesis of Carbon Nanotube–Steel Slag Composite for Pb(II) and Cu(II) Removal from Aqueous Solution Yang, Pengfei Li, Fangxian Wang, Beihan Niu, Yanfei Wei, Jiangxiong Yu, Qijun Nanomaterials (Basel) Article Methods and materials that effectively remove heavy metals, such as lead and copper, from wastewater are urgently needed. In this study, steel slag, a low-cost byproduct of steel manufacturing, was utilized as a substrate material for carbon nanotube (CNT) growth by chemical vapor deposition (CVD) to produce a new kind of efficient and low-cost absorbent without any pretreatment. The synthesis parameters of the developed CNT–steel slag composite (SS@CNTs) were optimized, and its adsorption capacities for Pb(II) and Cu(II) were evaluated. The results showed that the optimal growth time, synthesis temperature and acetylene flow rate were 45 min, 600 °C and 200 sccm (standard cubic centimeter per minute), respectively. The SS@CNTs composite had a high adsorption capacity with a maximum removal amount of 427.26 mg·g(−1) for Pb(II) and 132.79 mg·g(−1) for Cu(II). The adsorption proceeded rapidly during the first 15 min of adsorption and reached equilibrium at approximately 90 min. The adsorption processes were in accordance with the isotherms of the Langmuir model and the pseudo-second-order model, while the adsorption thermodynamics results indicated that the removal for both metals was an endothermic and spontaneous process. This study showed that compared with other adsorbent materials, the SS@CNTs composite is an efficient and low-cost adsorbent for heavy metals such as lead and copper. MDPI 2022-04-03 /pmc/articles/PMC9000475/ /pubmed/35407318 http://dx.doi.org/10.3390/nano12071199 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Yang, Pengfei Li, Fangxian Wang, Beihan Niu, Yanfei Wei, Jiangxiong Yu, Qijun In Situ Synthesis of Carbon Nanotube–Steel Slag Composite for Pb(II) and Cu(II) Removal from Aqueous Solution |
title | In Situ Synthesis of Carbon Nanotube–Steel Slag Composite for Pb(II) and Cu(II) Removal from Aqueous Solution |
title_full | In Situ Synthesis of Carbon Nanotube–Steel Slag Composite for Pb(II) and Cu(II) Removal from Aqueous Solution |
title_fullStr | In Situ Synthesis of Carbon Nanotube–Steel Slag Composite for Pb(II) and Cu(II) Removal from Aqueous Solution |
title_full_unstemmed | In Situ Synthesis of Carbon Nanotube–Steel Slag Composite for Pb(II) and Cu(II) Removal from Aqueous Solution |
title_short | In Situ Synthesis of Carbon Nanotube–Steel Slag Composite for Pb(II) and Cu(II) Removal from Aqueous Solution |
title_sort | in situ synthesis of carbon nanotube–steel slag composite for pb(ii) and cu(ii) removal from aqueous solution |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9000475/ https://www.ncbi.nlm.nih.gov/pubmed/35407318 http://dx.doi.org/10.3390/nano12071199 |
work_keys_str_mv | AT yangpengfei insitusynthesisofcarbonnanotubesteelslagcompositeforpbiiandcuiiremovalfromaqueoussolution AT lifangxian insitusynthesisofcarbonnanotubesteelslagcompositeforpbiiandcuiiremovalfromaqueoussolution AT wangbeihan insitusynthesisofcarbonnanotubesteelslagcompositeforpbiiandcuiiremovalfromaqueoussolution AT niuyanfei insitusynthesisofcarbonnanotubesteelslagcompositeforpbiiandcuiiremovalfromaqueoussolution AT weijiangxiong insitusynthesisofcarbonnanotubesteelslagcompositeforpbiiandcuiiremovalfromaqueoussolution AT yuqijun insitusynthesisofcarbonnanotubesteelslagcompositeforpbiiandcuiiremovalfromaqueoussolution |