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首页> 外文期刊>Environmental research >Removal of arsenic from aqueous solution by novel iron and iron-zirconium modified activated carbon derived from chemical carbonization of Tectona grandis sawdust: Isotherm, kinetic, thermodynamic and breakthrough curve modelling
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Removal of arsenic from aqueous solution by novel iron and iron-zirconium modified activated carbon derived from chemical carbonization of Tectona grandis sawdust: Isotherm, kinetic, thermodynamic and breakthrough curve modelling

机译：通过新型钢铁和铁锆改性活性炭从水溶液中除去砷来除去碳化纳的化学碳化：等温，动力学，热力学和突破曲线建模

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摘要

The aim of the present study was: development of activated carbon modified with iron (Fe@AC) and modified with iron and zirconium (Fe-Zr@AC) from the Tectona grandis sawdust (TGS) waste biomass and its potential applicability for the removal of As (Ⅲ) from contaminated water by batch and column mode. The biomass waste was pre-treated with ferric chloride (FeCl_3) and the mixture of FeCl_3 and zirconium oxide (ZrO_2) and then py-rolyzed at 500 °C for 2 h. The properties of both bioadsorbents were comprehensively characterized by using Scanning electron microscopy (SEM), Energy dispersive X-ray (EDX), Fourier transform infra-red spectroscopy CFTIR), X-ray diffraction (XRD), Particle Size analysis (PSA), point of zero charge (pH_(ZPC)), Brunauer-Emmett-Teller (BET) to prove successful impregnation of the Fe and Zr on the surface of AC of TGS. FTIR analysis clearly indicates the Fe and Fe-Zr complexation on biosorbents surface and biosorption of As (Ⅲ). The results revealed that maximum As (Ⅲ) removal was achieved 86.35% by Fe-Zr@AC (3 g/L dose, pH-7.0, temperature-25 °C and concentration 0.5 mg/L). However, maximum removal of As (Ⅲ) was attained -75% by Fe@AC (with dose-4g/ L, pH-7.0, temperature-25 °C and concentration 0.5 mg/L) at the initial concentration of 0.5 mg/L of As (Ⅲ). Fe-Zr@AC exhibits higher efficiency with q_(max) value 1.206 mg/g than Fe@AC with the q_(max) value 0.679 mg/g for the removal of As(Ⅲ). While in the column study, Fe-Zr@AC exhibited 98.8% removal at flow rate of 5 mL/ min and bed height of 5 cm. Biosorption Isotherm and Kinetics were fitted good with Langmuir isotherm (R2 > 0.99) and followed pseudo-second-order (R2 > 0.99). The regeneration study indicates that the prepared biosorbents efficiently recycled up to five cycles. Therefore, Fe@AC and Fe-Zr@AC derived from TGS has been showed to be novel, effective, and economical biosorbent. The collective benefits of easy development, good affinity towards As (Ⅲ), good separability, reusability, and inexpensive of magnetized Fe@AC and Fe-Zr@AC make it a novel biosorbent. The application of Fe-Zr@AC for the removal of As (Ⅲ) from the water was very efficient its concentration in the solution after treatment was found below the 10 μg/L as per the guideline WHO.
机译：本研究的目的是：用铁（Fe @ AC）改性活性炭的开发，并从Tectona Grandis Sawdust（TGS）废物生物量和其潜在适用性的钢铁和锆（Fe-Zr @ Ac）进行修饰通过批量和柱模式从污染水的污染水。将生物质废物用氯化铁（FECL_3）预处理和FECL_3和氧化锆（ZrO_2）的混合物，然后在500℃下溶液2小时。通过使用扫描电子显微镜（SEM），能量分散X射线（EDX），傅里叶变换红外光谱CFTIR），X射线衍射（XRD），粒度分析（PSA），傅立叶变换X射线（SEM），零充电（PH_（ZPC）），Brunauer-Emmett-Teller（BET）证明在TGS的AC表面上成功浸渍Fe和Zr。 FTIR分析清楚地表明Fe和Fe-Zr络合在生物吸水剂表面和Bio吸收的（Ⅲ）上。结果表明，通过Fe-Zr / AC（3g / L剂量，pH-7.0，温度-25℃和浓度为0.5mg / L），实现了最大AS（Ⅲ）去除86.35％。然而，在初始浓度为0.5mg / l（Ⅲ）。 FE-ZR @ AC的效率较高，Q_（最大值）值1.206 mg / g比Fe @ AC，Q_（最大）值为0.679 mg / g，用于去除（Ⅲ）。在柱研究中，Fe-Zr @ AC在5ml / min的流速下呈现98.8％，床高5厘米。生物吸附等温线和动力学良好，Langmuir等温线（R2> 0.99）良好，并跟踪伪二阶（R2> 0.99）。再生研究表明，制备的生物吸水剂有效地再循环多达五个循环。因此，已经显示出来自TGS的Fe @ AC和Fe-ZR @ AC是新颖，有效和经济的生物吸附剂。易开发的集体益处，对（Ⅲ）的良好亲和力，良好的可分离性，可重用性和廉价的磁化Fe @ AC和Fe-Zr @ AC使其成为一种新的生物吸附剂。 Fe-Zr @ AC从水中除去（Ⅲ）的施用非常有效地在溶液中浓度在溶液中溶液，如原则在10μg/ L以下。

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  • 来源
    《Environmental research》 |2021年第9期|111431.1-111431.15|共15页
  • 作者

    Naincy Sahu; Jiwan Singh; Janardhan Reddy Koduru;

  • 作者单位

    Laboratory of Environmental Nanotechnology and Bioremediation Department of Environmental Science Babasaheb Bhirnrao Ambedkar University Lucknow 226025 India;

    Laboratory of Environmental Nanotechnology and Bioremediation Department of Environmental Science Babasaheb Bhirnrao Ambedkar University Lucknow 226025 India;

    Department of Environmental Engineering Kwangwoon University Seoul 139-701 Republic of Korea;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Arsenic removal; Tectona grandis sawdust; Batch study; Biosorption isotherm; Kinetic; Column study;

    机译：灭绝砷;TECTONA GRANDIS SAWDUST;批量学习;生物吸附等温线;动力学;专栏研究;

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