Adsorption of Ni2+ on malic acid modified activated carbon from Phragmites australis

IF 1 4区综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES

Scienceasia Pub Date : 2022-01-01 DOI:10.2306/scienceasia1513-1874.2022.077

Dongmei He, Jian Zhang, Z. Shang, Chenglu Zhang

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Abstract

: To tackle the issue of environmental pollution caused by heavy metal ions, a novel malic acid modiﬁed activated carbon (denoted as MA-AC) from (the plant) Phragmites australis has been successfully prepared with high Ni 2 + adsorption capacity (38.36 mg / g). The physical and chemical characteristics of MA-AC were evaluated by N 2 adsorption / desorption, Scanning Electron Microscope (SEM), Fourier Transform Infrared (FTIR), and X-ray Photoelectron Spectroscopy (XPS). The results indicated that the MA-AC has more microporous structures and more oxygen bearing functional groups than the unmodiﬁed AC (denoted as AC). The Ni 2 + adsorption behaviors of the adsorbents were investigated by batch experiments, which indicated that the MA-AC showed 38% higher Ni 2 + adsorption capacity than the unmodiﬁed AC. The adsorption isotherms and the kinetics of the absorbents agreed well with the Langmuir model and the pseudo-second-order model. The Ni 2 + adsorption mechanisms of MA-AC were investigated by FTIR and XPS analyses. The results from the analyses indicated that the enhanced surface adsorption of Ni 2 + on MA-AC are attributed to the chemistry between the Ni 2 + and the oxygen-containing functional groups on the surface.

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苹果酸改性芦苇活性炭对Ni2+的吸附研究

为解决重金属离子对环境的污染问题，以芦苇为原料制备了一种新型苹果酸改性活性炭(MA-AC)，该活性炭具有较高的Ni 2 +吸附量(38.36 mg / g)，并通过n2吸附/解吸、扫描电镜(SEM)、傅立叶变换红外(FTIR)和x射线光电子能谱(XPS)对其物理化学特性进行了评价。结果表明，与未改性的AC相比，MA-AC具有更多的微孔结构和更多的含氧官能团。通过批量实验研究了吸附剂对Ni 2 +的吸附行为，结果表明，MA-AC对Ni 2 +的吸附量比未改性AC高38%，吸附等温线和吸附动力学符合Langmuir模型和拟二阶模型。通过FTIR和XPS分析探讨了MA-AC对Ni 2 +的吸附机理。分析结果表明，MA-AC表面对Ni 2 +的吸附增强是由于Ni 2 +与表面含氧官能团之间的化学反应。

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来源期刊

Scienceasia MULTIDISCIPLINARY SCIENCES-

CiteScore

1.70

自引率

33.30%

发文量

102

审稿时长

1 months

期刊介绍： ScienceAsia is a multidisciplinary journal publishing papers of high quality bimonthly, in printed and electronic versions, by the Science Society of Thailand under Royal Patronage and the National Research Council of Thailand. The journal publishes original research papers that provide novel findings and important contribution to broad area in science and mathematics. Areas covered include Biological Sciences and Biotechnology, Chemistry and Material Sciences, Environmental and Applied Sciences, and Mathematics and Physical Sciences. Manuscripts may report scientifically useful data, observations or model predictions, and/or provide a new scientific concept or a new explanation of published results. Submissions of materials of current scientific interest are highly welcome, provided that there is sufficient scientific merit. The journal will not accept manuscripts which have been published or are being considered for publication elsewhere, nor should manuscripts being considered by ScienceAsia be submitted to other journals. Submitted manuscripts must conform to the guidelines given in the Instructions for Authors