Evaluation of the Adsorption Efficiency of Biopolymer Hydrogel Nanocomposite/Nanoclay in Wastewater Dye Removal

IF 0.4 Q4 ENVIRONMENTAL SCIENCES Asian Journal of Water, Environment and Pollution Pub Date : 2024-07-25 DOI:10.3233/ajw240045

Nadher D. Radia, Shaimaa M. Essa, Aseel M. Aljeboree, Mohammed Abed Jawad

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Abstract

A new type of hybrid biopolymer nanocomposite hydrogel was created using sodium alginate and carrageenan combined with N-isopropyl acrylamide and bentonite nanoclay. The hydrogel was synthesised through free radical polymerisation. The purpose was to test its ability to remove the dye crystal violet (CV) from an aqueous solution. The structure and morphology of the synthesised nanocomposite hydrogel were analysed using Fourier transform infrared spectroscopy, scanning electron microscopy, and X-ray diffraction. Key parameters affecting the efficiency of crystal violet removal were explored, including pH, initial dye concentration, contact time, and amount of adsorbent. Optimal values for each parameter were identified. The removal mechanism was highly pH-dependent, with the dye removal rate increasing when more nanoclay was added in an acidic environment. Using an initial dye concentration of 30 mg/L and 0.05 g of the nanocomposite hydrogel, the equilibrium adsorption time was 3 hours. The adsorption matched the Langmuir isotherm model and followed pseudo-second order kinetics. Overall, the nanocomposite hydrogel was an effective adsorbent for eliminating crystal violet dye from water.

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评估生物聚合物水凝胶纳米复合材料/纳米粘土在去除废水染料中的吸附效率

利用海藻酸钠和卡拉胶与 N-异丙基丙烯酰胺和纳米膨润土相结合，制成了一种新型杂化生物聚合物纳米复合水凝胶。这种水凝胶是通过自由基聚合合成的。目的是测试其从水溶液中去除染料结晶紫（CV）的能力。利用傅立叶变换红外光谱、扫描电子显微镜和 X 射线衍射分析了合成的纳米复合水凝胶的结构和形态。研究了影响水晶紫去除效率的关键参数，包括 pH 值、初始染料浓度、接触时间和吸附剂用量。确定了每个参数的最佳值。去除机理高度依赖于 pH 值，在酸性环境中添加更多的纳米黏土，染料去除率就会增加。在初始染料浓度为 30 毫克/升、纳米复合水凝胶的用量为 0.05 克时，平衡吸附时间为 3 小时。吸附符合 Langmuir 等温线模型，并遵循假二阶动力学。总之，纳米复合水凝胶是消除水中结晶紫染料的有效吸附剂。

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来源期刊

Asian Journal of Water, Environment and Pollution ENVIRONMENTAL SCIENCES-

CiteScore

1.00

自引率

20.00%

发文量

期刊介绍： Asia, as a whole region, faces severe stress on water availability, primarily due to high population density. Many regions of the continent face severe problems of water pollution on local as well as regional scale and these have to be tackled with a pan-Asian approach. However, the available literature on the subject is generally based on research done in Europe and North America. Therefore, there is an urgent and strong need for an Asian journal with its focus on the region and wherein the region specific problems are addressed in an intelligent manner. In Asia, besides water, there are several other issues related to environment, such as; global warming and its impact; intense land/use and shifting pattern of agriculture; issues related to fertilizer applications and pesticide residues in soil and water; and solid and liquid waste management particularly in industrial and urban areas. Asia is also a region with intense mining activities whereby serious environmental problems related to land/use, loss of top soil, water pollution and acid mine drainage are faced by various communities. Essentially, Asians are confronted with environmental problems on many fronts. Many pressing issues in the region interlink various aspects of environmental problems faced by population in this densely habited region in the world. Pollution is one such serious issue for many countries since there are many transnational water bodies that spread the pollutants across the entire region. Water, environment and pollution together constitute a three axial problem that all concerned people in the region would like to focus on.