{"title":"Efficient Removal of Paraquat Pollutants Using Magnetic Biochar Derived from Corn Husk Waste: A Sustainable Approach for Water Remediation","authors":"Sakonsupa Damdib, Adisak Siyasukh, Bhawaranchat Vanichsetakul, Phamornsiri Phamornpiboon, Chanchana Thanachayanont, Patiparn Punyapalakul, Nattaporn Tonanon","doi":"10.1155/2023/5512881","DOIUrl":null,"url":null,"abstract":"Due to the widespread production of maize, the waste created by this crop has become a serious concern. This study applied the concept of waste circulation to the production of magnetic biochar from corn husk waste to remediate paraquat-contaminated water. Magnetic biochar (MB) was produced by impregnating maize husks with iron and carbonizing the residue in a nitrogen environment. Carbonized MB at the temperature of 850°C (MB-01-850) exhibited a combination of microporous and mesoporous structures ( <math xmlns=\"http://www.w3.org/1998/Math/MathML\" id=\"M1\"> <msub> <mrow> <mi>V</mi> </mrow> <mrow> <mtext>meso</mtext> </mrow> </msub> <mo>=</mo> <mn>0.30</mn> <mtext> </mtext> <mtext>c</mtext> <msup> <mrow> <mtext>m</mtext> </mrow> <mrow> <mn>3</mn> </mrow> </msup> <mo>/</mo> <mtext>g</mtext> </math> , <math xmlns=\"http://www.w3.org/1998/Math/MathML\" id=\"M2\"> <msub> <mrow> <mi>V</mi> </mrow> <mrow> <mtext>micro</mtext> </mrow> </msub> <mo>=</mo> <mn>0.12</mn> <mtext> </mtext> <mtext>c</mtext> <msup> <mrow> <mtext>m</mtext> </mrow> <mrow> <mn>3</mn> </mrow> </msup> <mo>/</mo> <mtext>g</mtext> </math> ), while biochar created only a microporous structure ( <math xmlns=\"http://www.w3.org/1998/Math/MathML\" id=\"M3\"> <msub> <mrow> <mi>V</mi> </mrow> <mrow> <mtext>micro</mtext> </mrow> </msub> <mo>=</mo> <mn>0.11</mn> <mtext> </mtext> <mtext>c</mtext> <msup> <mrow> <mtext>m</mtext> </mrow> <mrow> <mn>3</mn> </mrow> </msup> <mo>/</mo> <mtext>g</mtext> </math> ). According to the findings, Fe(NO3)3 significantly affected the increase in mesopore formation after carbonization. In addition, biochar exhibits excellent magnetic responsiveness. MB-01-850 reached equilibrium within approximately 20 min in synthetic water. Batch adsorption studies showed that MB-01-850 had maximum adsorption capacities ( <math xmlns=\"http://www.w3.org/1998/Math/MathML\" id=\"M4\"> <msub> <mrow> <mi>Q</mi> </mrow> <mrow> <mn>0</mn> </mrow> </msub> </math> ) of 34.97 mg/g and 31.63 mg/g for synthetic and natural water, respectively. The unmodified biochar (without mesopores) had a <math xmlns=\"http://www.w3.org/1998/Math/MathML\" id=\"M5\"> <msub> <mrow> <mi>Q</mi> </mrow> <mrow> <mn>0</mn> </mrow> </msub> </math> of 4.08 mg/g. This indicates that the presence of mesopores improves the effectiveness of paraquat adsorption. Additionally, the adsorption performance of magnetic biochar exhibited no statistically significant variance when tested under natural water conditions. Furthermore, magnetic biochar demonstrates impressive regeneration capacity, allowing it to be regenerated almost entirely for a minimum of four cycles using a sodium hydroxide (NaOH) solution with a concentration equal to or greater than 0.5 M.","PeriodicalId":7315,"journal":{"name":"Adsorption Science & Technology","volume":"96 1","pages":"0"},"PeriodicalIF":2.8000,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Adsorption Science & Technology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1155/2023/5512881","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}
引用次数: 0
Abstract
Due to the widespread production of maize, the waste created by this crop has become a serious concern. This study applied the concept of waste circulation to the production of magnetic biochar from corn husk waste to remediate paraquat-contaminated water. Magnetic biochar (MB) was produced by impregnating maize husks with iron and carbonizing the residue in a nitrogen environment. Carbonized MB at the temperature of 850°C (MB-01-850) exhibited a combination of microporous and mesoporous structures ( , ), while biochar created only a microporous structure ( ). According to the findings, Fe(NO3)3 significantly affected the increase in mesopore formation after carbonization. In addition, biochar exhibits excellent magnetic responsiveness. MB-01-850 reached equilibrium within approximately 20 min in synthetic water. Batch adsorption studies showed that MB-01-850 had maximum adsorption capacities ( ) of 34.97 mg/g and 31.63 mg/g for synthetic and natural water, respectively. The unmodified biochar (without mesopores) had a of 4.08 mg/g. This indicates that the presence of mesopores improves the effectiveness of paraquat adsorption. Additionally, the adsorption performance of magnetic biochar exhibited no statistically significant variance when tested under natural water conditions. Furthermore, magnetic biochar demonstrates impressive regeneration capacity, allowing it to be regenerated almost entirely for a minimum of four cycles using a sodium hydroxide (NaOH) solution with a concentration equal to or greater than 0.5 M.
由于玉米的广泛生产,这种作物产生的浪费已经成为一个严重的问题。本研究将废物循环的概念应用于利用玉米皮废弃物生产磁性生物炭来修复百草枯污染的水体。用铁浸渍玉米壳,在氮环境下炭化剩余物,制备磁性生物炭。850℃下碳化的MB (MB-01-850)表现为微孔和介孔结构的结合(V meso = 0.30 C m 3 / g, V micro = 0.12 C m 3 / g),而生物炭仅形成微孔结构(V micro = 0.11 C m 3 / g)。结果表明,Fe(NO3)3对碳化后中孔形成的增加有显著影响。此外,生物炭表现出优异的磁响应性。MB-01-850在合成水中约20分钟内达到平衡。批量吸附实验表明,MB-01-850对合成水和天然水的最大吸附量(q0)分别为34.97 mg/g和31.63 mg/g。未经修饰的生物炭(不含中孔)的q0为4.08 mg/g。这表明介孔的存在提高了百草枯的吸附效果。此外,在自然水体条件下,磁性生物炭的吸附性能差异无统计学意义。此外,磁性生物炭表现出令人印象深刻的再生能力,使用浓度等于或大于0.5 M的氢氧化钠(NaOH)溶液,它几乎可以完全再生至少四个循环。
期刊介绍:
Adsorption Science & Technology is a peer-reviewed, open access journal devoted to studies of adsorption and desorption phenomena, which publishes original research papers and critical review articles, with occasional special issues relating to particular topics and symposia.