Efficient fluoride removal from aqueous solution by sorption using natural adsorbent - eugenia jambolana: Equilibrium isotherm analysis and influence of anions

IF 1.3 4区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY

Main Group Chemistry Pub Date : 2023-06-14 DOI:10.3233/mgc-220074

J. Sumathi, B. Benedict, B. Jebasingh, L. Sheela

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引用次数: 0

Abstract

Commercial industries which employ metallurgical extraction, cement manufacturing and fuel cells expulse heavy volumes of fluoride-containing wastewater into the natural environment posing grave threats to public health. In the current study, a locally available plant known as Jamun (Eugenia Jambolana), was used as an adsorbent for fluoride removal from aqueous solutions. Physico-chemical experiments were conducted to reveal the size and surface distribution of natural fluoride adsorption on the adsorbent surface using SEM, XRD, and FT- IR. Effects of different parameters such as solution pH, adsorbent dosage (m), co-ions contact time (t), fluoride concentration, and flow rates were investigated. Additionally, the adsorption efficiency of competing ions like Cl-, NO-3, SO2-4, PO3-4, Ca2+, and Mg2+ and their physiological effects were studied under different solution concentrations ranging from 20 – 200 mg / L at pH 6.90±0.10 for 1 hour. Results showed that the adsorption equilibrium and kinetic data were matched with the isotherm Langmuir model (R2 = 0.98) and Freundlich model (R2 = 0.97). Also, we could conclude that the adsorption process of fluoride using the natural adsorbent resu bivalve shells was an endothermic reaction and resulted in a spontaneous adsorption process. Adsorption kinetic models revealed a swift adsorption rate with minimum and maximum fluoride concentrations as 100 mg / L and 500 mg / L with contact time (t) = 60 minutes at adsorbent dosage (m) = 1 g / L.

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利用天然吸附剂-生龙花吸附有效去除水溶液中的氟化物:平衡等温线分析和阴离子的影响

采用冶金开采、水泥制造和燃料电池的商业工业将大量含氟废水排入自然环境，对公众健康构成严重威胁。在目前的研究中，使用一种当地可获得的植物Jamun (Jambolana Eugenia)作为吸附剂，从水溶液中去除氟化物。利用扫描电镜(SEM)、x射线衍射(XRD)和红外光谱(FT- IR)对天然氟在吸附剂表面的吸附大小和表面分布进行了理化实验。考察了溶液pH、吸附剂用量(m)、共离子接触时间(t)、氟化物浓度和流速等参数对吸附性能的影响。此外，在pH为6.90±0.10、溶液浓度为20 ~ 200 mg / L的条件下，研究了Cl-、NO-3、SO2-4、PO3-4、Ca2+、Mg2+等竞争离子的吸附效率及其生理效应。结果表明，吸附平衡和动力学数据符合等温Langmuir模型(R2 = 0.98)和Freundlich模型(R2 = 0.97)。天然吸附剂双壳壳对氟的吸附过程为吸热反应，为自发吸附过程。吸附动力学模型表明，在吸附剂用量(m) = 1 g / L时，最小氟浓度为100 mg / L，最大氟浓度为500 mg / L，接触时间(t) = 60 min，吸附速率快。

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来源期刊

Main Group Chemistry 化学-化学综合

CiteScore

2.00

自引率

26.70%

发文量

审稿时长

>12 weeks

期刊介绍： Main Group Chemistry is intended to be a primary resource for all chemistry, engineering, biological, and materials researchers in both academia and in industry with an interest in the elements from the groups 1, 2, 12–18, lanthanides and actinides. The journal is committed to maintaining a high standard for its publications. This will be ensured by a rigorous peer-review process with most articles being reviewed by at least one editorial board member. Additionally, all manuscripts will be proofread and corrected by a dedicated copy editor located at the University of Kentucky.