{"title":"二氧化硅涂层氧化锌纳米复合材料的生物制造与表征:修复受六价铬污染废水的可持续方法","authors":"Divya Bhushan, Renuka Gupta","doi":"10.1007/s11270-024-07182-6","DOIUrl":null,"url":null,"abstract":"<div><p>Present research investigates synthesis of silica-coated zinc oxide nanocomposite (Si-ZnO NC) from plant material and its application in remediation of Cr(VI) from water systems. The synthesized nanocomposite was assessed using XRD, FTIR, SEM-EDAX, and BET analysis. Si-ZnO NC possessed a mean pore diameter and volume, 27.964 nm and 0.1895 cm<sup>3</sup>g<sup>-1</sup><sub>,</sub> respectively and a specific surface area of 27.113 m<sup>2</sup>g<sup>-1</sup>. The nanocomposite had roughly spherical particles in agglomerated form as per SEM analysis. Effects of pH, metal concentration, adsorbent dose, temperature and time on Cr(VI) removal were investigated in batch mode experiments. The adsorption conditions including pH 2, metal concentration 10 mg/L, nanocomposite dose 0.4 g/L with a contact time 60 min at 25 ± 2 <sup>o</sup> C temperature showed 92% Cr(VI) removal. Langmuir isotherm model (R<sup>2</sup> = 0.9978) and pseudo-second-order model (R<sup>2</sup> = 0.9998) proposed a decent explanation for Cr(VI) adsorption rate. The process was found spontaneous and endothermic. Adsorption mechanism involved electrostatic interaction, redox reactions and adsorption coupled reduction. The regeneration ability of Si-ZnO NC was 86% Cr(VI) after three reusability cycles with 0.1M NaOH desorbing reagent as compared to 15% ammonia water. Si-ZnO NC proved to be sustainable and eco-accommodating due to its low-cost raw substance value, efficient adsorption efficiency and regeneration ability.</p><h3>Graphical Abstract</h3>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":null,"pages":null},"PeriodicalIF":3.8000,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Biofabrication and Characterization of Silica-coated Zinc Oxide Nanocomposite: A Sustainable Approach in Remediation of Cr(VI) Contaminated Wastewater\",\"authors\":\"Divya Bhushan, Renuka Gupta\",\"doi\":\"10.1007/s11270-024-07182-6\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Present research investigates synthesis of silica-coated zinc oxide nanocomposite (Si-ZnO NC) from plant material and its application in remediation of Cr(VI) from water systems. The synthesized nanocomposite was assessed using XRD, FTIR, SEM-EDAX, and BET analysis. Si-ZnO NC possessed a mean pore diameter and volume, 27.964 nm and 0.1895 cm<sup>3</sup>g<sup>-1</sup><sub>,</sub> respectively and a specific surface area of 27.113 m<sup>2</sup>g<sup>-1</sup>. The nanocomposite had roughly spherical particles in agglomerated form as per SEM analysis. Effects of pH, metal concentration, adsorbent dose, temperature and time on Cr(VI) removal were investigated in batch mode experiments. The adsorption conditions including pH 2, metal concentration 10 mg/L, nanocomposite dose 0.4 g/L with a contact time 60 min at 25 ± 2 <sup>o</sup> C temperature showed 92% Cr(VI) removal. Langmuir isotherm model (R<sup>2</sup> = 0.9978) and pseudo-second-order model (R<sup>2</sup> = 0.9998) proposed a decent explanation for Cr(VI) adsorption rate. The process was found spontaneous and endothermic. Adsorption mechanism involved electrostatic interaction, redox reactions and adsorption coupled reduction. The regeneration ability of Si-ZnO NC was 86% Cr(VI) after three reusability cycles with 0.1M NaOH desorbing reagent as compared to 15% ammonia water. Si-ZnO NC proved to be sustainable and eco-accommodating due to its low-cost raw substance value, efficient adsorption efficiency and regeneration ability.</p><h3>Graphical Abstract</h3>\\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":808,\"journal\":{\"name\":\"Water, Air, & Soil Pollution\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.8000,\"publicationDate\":\"2024-05-27\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Water, Air, & Soil Pollution\",\"FirstCategoryId\":\"6\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s11270-024-07182-6\",\"RegionNum\":4,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENVIRONMENTAL SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Water, Air, & Soil Pollution","FirstCategoryId":"6","ListUrlMain":"https://link.springer.com/article/10.1007/s11270-024-07182-6","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
Biofabrication and Characterization of Silica-coated Zinc Oxide Nanocomposite: A Sustainable Approach in Remediation of Cr(VI) Contaminated Wastewater
Present research investigates synthesis of silica-coated zinc oxide nanocomposite (Si-ZnO NC) from plant material and its application in remediation of Cr(VI) from water systems. The synthesized nanocomposite was assessed using XRD, FTIR, SEM-EDAX, and BET analysis. Si-ZnO NC possessed a mean pore diameter and volume, 27.964 nm and 0.1895 cm3g-1, respectively and a specific surface area of 27.113 m2g-1. The nanocomposite had roughly spherical particles in agglomerated form as per SEM analysis. Effects of pH, metal concentration, adsorbent dose, temperature and time on Cr(VI) removal were investigated in batch mode experiments. The adsorption conditions including pH 2, metal concentration 10 mg/L, nanocomposite dose 0.4 g/L with a contact time 60 min at 25 ± 2 o C temperature showed 92% Cr(VI) removal. Langmuir isotherm model (R2 = 0.9978) and pseudo-second-order model (R2 = 0.9998) proposed a decent explanation for Cr(VI) adsorption rate. The process was found spontaneous and endothermic. Adsorption mechanism involved electrostatic interaction, redox reactions and adsorption coupled reduction. The regeneration ability of Si-ZnO NC was 86% Cr(VI) after three reusability cycles with 0.1M NaOH desorbing reagent as compared to 15% ammonia water. Si-ZnO NC proved to be sustainable and eco-accommodating due to its low-cost raw substance value, efficient adsorption efficiency and regeneration ability.
期刊介绍:
Water, Air, & Soil Pollution is an international, interdisciplinary journal on all aspects of pollution and solutions to pollution in the biosphere. This includes chemical, physical and biological processes affecting flora, fauna, water, air and soil in relation to environmental pollution. Because of its scope, the subject areas are diverse and include all aspects of pollution sources, transport, deposition, accumulation, acid precipitation, atmospheric pollution, metals, aquatic pollution including marine pollution and ground water, waste water, pesticides, soil pollution, sewage, sediment pollution, forestry pollution, effects of pollutants on humans, vegetation, fish, aquatic species, micro-organisms, and animals, environmental and molecular toxicology applied to pollution research, biosensors, global and climate change, ecological implications of pollution and pollution models. Water, Air, & Soil Pollution also publishes manuscripts on novel methods used in the study of environmental pollutants, environmental toxicology, environmental biology, novel environmental engineering related to pollution, biodiversity as influenced by pollution, novel environmental biotechnology as applied to pollution (e.g. bioremediation), environmental modelling and biorestoration of polluted environments.
Articles should not be submitted that are of local interest only and do not advance international knowledge in environmental pollution and solutions to pollution. Articles that simply replicate known knowledge or techniques while researching a local pollution problem will normally be rejected without review. Submitted articles must have up-to-date references, employ the correct experimental replication and statistical analysis, where needed and contain a significant contribution to new knowledge. The publishing and editorial team sincerely appreciate your cooperation.
Water, Air, & Soil Pollution publishes research papers; review articles; mini-reviews; and book reviews.