Pb2+ Adsorption, Performance, and Response Surface Optimization of Hydroxyapatite Nanowire Sodium Alginate Aerogel (HSA)

IF 1.4 4区环境科学与生态学 Q4 WATER RESOURCES

Water SA Pub Date : 2025-02-21 DOI:10.3390/w17050631

Weiyuan Cao, Zixuan Yang, Ren Liu, Zilin Zhang, Guokuan Chen, Zilin Zhou, Liwei Xu

{"title":"Pb2+ Adsorption, Performance, and Response Surface Optimization of Hydroxyapatite Nanowire Sodium Alginate Aerogel (HSA)","authors":"Weiyuan Cao, Zixuan Yang, Ren Liu, Zilin Zhang, Guokuan Chen, Zilin Zhou, Liwei Xu","doi":"10.3390/w17050631","DOIUrl":null,"url":null,"abstract":"A novel composite biomass aerogel adsorbent (HSA) was prepared by dual physical and chemical cross-linking using sodium alginate (SA) as an organic biomass template and hydroxyapatite nanowires (HAPNWs) as an inorganic biomass skeleton. The structure of the HSA was characterized by scanning electron microscopy (SEM), X-ray powder diffractometry (XRD), Fourier transformed infrared spectroscopy (FTIR), and stress testing. One-factor experiments were conducted focusing on adsorption conditions at a Pb ion concentration of 300 mg/L, and the adsorption conditions were optimized using the response surface method. The optimal conditions obtained by numerical optimization using Design-Expert 13 were as follows: pH of 7.23, adsorption temperature of 35.42 °C, and adsorption time of 1050.73 min; the optimal adsorption capacity was 278.874 mg/g. To further reveal the adsorption mechanism of HSA, its adsorption model and kinetics were analyzed. Adsorption was most consistent with the Langmuir isothermal adsorption model, while the kinetics were most consistent with the pseudo-secondary kinetic model. R2 reached 0.9986, indicating a mono-molecular layer of adsorption by heat, while the main adsorption mechanism was chemisorption.","PeriodicalId":23623,"journal":{"name":"Water SA","volume":"17 5","pages":"631-631"},"PeriodicalIF":1.4000,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Water SA","FirstCategoryId":"0","ListUrlMain":"https://doi.org/10.3390/w17050631","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"WATER RESOURCES","Score":null,"Total":0}

引用次数: 0

Abstract

A novel composite biomass aerogel adsorbent (HSA) was prepared by dual physical and chemical cross-linking using sodium alginate (SA) as an organic biomass template and hydroxyapatite nanowires (HAPNWs) as an inorganic biomass skeleton. The structure of the HSA was characterized by scanning electron microscopy (SEM), X-ray powder diffractometry (XRD), Fourier transformed infrared spectroscopy (FTIR), and stress testing. One-factor experiments were conducted focusing on adsorption conditions at a Pb ion concentration of 300 mg/L, and the adsorption conditions were optimized using the response surface method. The optimal conditions obtained by numerical optimization using Design-Expert 13 were as follows: pH of 7.23, adsorption temperature of 35.42 °C, and adsorption time of 1050.73 min; the optimal adsorption capacity was 278.874 mg/g. To further reveal the adsorption mechanism of HSA, its adsorption model and kinetics were analyzed. Adsorption was most consistent with the Langmuir isothermal adsorption model, while the kinetics were most consistent with the pseudo-secondary kinetic model. R2 reached 0.9986, indicating a mono-molecular layer of adsorption by heat, while the main adsorption mechanism was chemisorption.

查看原文本刊更多论文

羟基磷灰石纳米线海藻酸钠气凝胶（HSA）对Pb2+的吸附、性能及响应面优化

以海藻酸钠（SA）为有机生物质模板，羟基磷灰石纳米线（HAPNWs）为无机生物质骨架，采用双物理化学交联法制备了新型复合生物质气凝胶吸附剂（HSA）。采用扫描电镜（SEM）、x射线粉末衍射（XRD）、傅里叶变换红外光谱（FTIR）和应力测试对HSA的结构进行了表征。对铅离子浓度为300 mg/L时的吸附条件进行了单因素实验，并利用响应面法对吸附条件进行了优化。利用Design-Expert 13进行数值优化得到的最佳条件为：pH为7.23，吸附温度为35.42℃，吸附时间为1050.73 min；最佳吸附量为278.874 mg/g。为了进一步揭示HSA的吸附机理，对其吸附模型和动力学进行了分析。吸附最符合Langmuir等温吸附模型，动力学最符合拟二次动力学模型。R2达到0.9986，表明存在单分子层热吸附，主要吸附机制为化学吸附。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Water SA 环境科学-水资源

CiteScore

2.80

自引率

6.70%

发文量

审稿时长

18-36 weeks

期刊介绍： WaterSA publishes refereed, original work in all branches of water science, technology and engineering. This includes water resources development; the hydrological cycle; surface hydrology; geohydrology and hydrometeorology; limnology; salinisation; treatment and management of municipal and industrial water and wastewater; treatment and disposal of sewage sludge; environmental pollution control; water quality and treatment; aquaculture in terms of its impact on the water resource; agricultural water science; etc. Water SA is the WRC’s accredited scientific journal which contains original research articles and review articles on all aspects of water science, technology, engineering and policy. Water SA has been in publication since 1975 and includes articles from both local and international authors. The journal is issued quarterly (4 editions per year).