Co-Precipitation Synthesis of Clay-Magnetite Nanocomposite for Adsorptive Removal of Synthetic Dye in Wastewater of Benang Bintik Batik

Q3 Chemistry Molekul Pub Date : 2022-07-21 DOI:10.20884/1.jm.2022.17.2.6358
K. Karelius, I. M. Sadiana, A. Fatah, Retno Agnestisia
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引用次数: 2

Abstract

Clay is a natural material that has been widely applied as a low-cost adsorbent for removing various contaminants from wastewater. To improve its characteristics and activity, natural clay from Central Kalimantan was activated by acid and calcination treatments, then synthesized with magnetite (Fe3O4) in nanocomposite by co-precipitation method. The obtained nanocomposite was further characterized by Fourier transform infrared spectroscopy, X-ray diffraction, nitrogen adsorption, vibrating sample magnetometry, and transmission electron microscopy methods. The results showed that co-precipitation method has been successfully produced clay-magnetite nanocomposite from activated clay with specific surface area, saturation magnetization, and particle size were 37.458 m2/g, 24.910 emu/g, and 50 nm, respectively. The obtained natural clay, activated clay, and clay-magnetite nanocomposite were then evaluated for adsorptive removal of naphthol blue black (NBB) synthetic dye from wastewater generated by an industry of Benang Bintik batik in Central Kalimantan using a batch system. The results showed that optimum pH for adsorptive removal process from these adsorbents were 2, while the optimum contact times of natural clay, activated clay, and clay-magnetite nanocomposite were 90, 60, and 60 minutes, respectively. The clay-magnetite nanocomposite also showed a much better removal efficiency (99.58%) than activated clay (86.28%) and natural clay (68.27%). The utilization of clay-magnetite nanocomposite as adsorbent not only can increase its removal efficiency against NBB dye, but also can facilitate the separation of the adsorbent solid phase from wastewater using an external magnetic field after the adsorptive removal process.
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共沉淀法合成粘土-磁铁矿纳米复合材料吸附去除贝宁蜡染废水中的合成染料
粘土是一种天然材料,作为一种低成本的吸附剂,已被广泛应用于去除废水中的各种污染物。为了提高其特性和活性,采用酸和煅烧处理对中加里曼丹天然粘土进行活化,然后用共沉淀法在纳米复合材料中合成了磁铁矿(Fe3O4)。通过傅立叶变换红外光谱、X射线衍射、氮吸附、振动样品磁强计和透射电子显微镜方法对所获得的纳米复合材料进行了进一步表征。结果表明,以活性粘土为原料,采用共沉淀法成功制备了比表面积为37.458m2/g、饱和磁化强度为24.910emu/g、粒径为50nm的粘土-磁铁矿纳米复合材料。然后评估所获得的天然粘土、活性粘土和粘土-磁铁矿纳米复合材料使用间歇系统从中加里曼丹Benang Bintik蜡染工业产生的废水中吸附去除萘酚蓝黑(NBB)合成染料的效果。结果表明,这些吸附剂吸附去除过程的最佳pH为2,而天然粘土、活性粘土和粘土-磁铁矿纳米复合材料的最佳接触时间分别为90、60和60分钟。粘土-磁铁矿纳米复合材料的去除率(99.58%)也远高于活性粘土(86.28%)和天然粘土(68.27%)。利用粘土-磁铁矿复合材料作为吸附剂不仅可以提高其对NBB染料的去除效率,而且可以在吸附去除过程之后利用外部磁场促进吸附剂固相与废水的分离。
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来源期刊
Molekul
Molekul Chemistry-Chemistry (all)
CiteScore
1.30
自引率
0.00%
发文量
31
审稿时长
4 weeks
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