WATER SOLUTION POLISHING OF NITRATE USING POTASSIUM PERMANGANATE MODIFIED ZEOLITE: PARAMETRIC EXPERIMENTS, KINETICS AND EQUILIBRIUM ANALYSIS

IF 1.2 4区环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES

Global Nest Journal Pub Date : 2016-01-01 DOI:10.30955/gnj.001833

A. Alinejad, A. Mohseni-Bandpei, M. Ghaderpoori

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引用次数: 34

Abstract

In the present study, adsorption potential of potassium permanganate (Hypermangan) modified zeolite was investigated for the removal of nitrate from synthetic wastewater. Effects of the most significant parameters (pH, adsorbent dose, nitrate concentration and contact time) were initially evaluated based on the percentage of nitrate removed from the water solutions. Over 90 % removal of 150 mg l nitrate was achieved at an optimum pH of 5, adsorbent dose of 2g l after a 60 min contact time. The chemical and morphological characterizations of Hypermangan modified zeolite (HMZ) were carried out by using scanning electron microscopy (SEM), fourier transform infrared (FT-IR), x-ray diffraction (XRD) and x-ray fluorescence (XRF) analysis methods. Kinetic evaluation indicated that the nitrate adsorption onto HMZ followed the pseudofirst-order model. The equilibrium data assessment illustrated the removal of nitrate by HMZ follows a Langmuir model which attains the maximum adsorption capacity 6.7 mg g.The mean free energy of adsorption was 0.15 kJ mol, which indicates the adsorption of nitrate onto HMZ, occurs through a physical mechanism.

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高锰酸钾改性沸石对硝酸盐水溶液抛光:参数实验、动力学及平衡分析

研究了高锰酸钾改性沸石对合成废水中硝酸盐的吸附性能。最重要的参数(pH、吸附剂剂量、硝酸盐浓度和接触时间)的影响是根据从水溶液中去除硝酸盐的百分比初步评估的。在最佳pH为5，吸附剂剂量为2g l的条件下，接触时间60 min后，150mg l的硝酸盐去除率达到90%以上。采用扫描电镜(SEM)、傅里叶变换红外(FT-IR)、x射线衍射(XRD)和x射线荧光(XRF)等分析方法对氢氧化钠改性沸石(HMZ)进行了化学和形态表征。动力学评价表明，硝酸盐在HMZ上的吸附符合准一级模型。平衡数据评估表明，HMZ对硝酸盐的去除符合Langmuir模型，最大吸附量为6.7 mg g，平均吸附自由能为0.15 kJ mol，表明硝酸盐在HMZ上的吸附是通过物理机制进行的。

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来源期刊

Global Nest Journal 环境科学-环境科学

CiteScore

1.50

自引率

9.10%

发文量

100

审稿时长

>12 weeks

期刊介绍： Global Network of Environmental Science and Technology Journal (Global NEST Journal) is a scientific source of information for professionals in a wide range of environmental disciplines. The Journal is published both in print and online. Global NEST Journal constitutes an international effort of scientists, technologists, engineers and other interested groups involved in all scientific and technological aspects of the environment, as well, as in application techniques aiming at the development of sustainable solutions. Its main target is to support and assist the dissemination of information regarding the most contemporary methods for improving quality of life through the development and application of technologies and policies friendly to the environment