Synthesis of a Green Adsorbent Surface Gels: Development of Ratio Preparation of Polymer SA/Bentonite Bead, and its Industrial Applications for Removal of Aqueous Pollutants

IF 0.4 Q4 ENVIRONMENTAL SCIENCES

Asian Journal of Water, Environment and Pollution Pub Date : 2024-02-06 DOI:10.3233/ajw240006

Zaied A. Mossa, Faris Hamood Mohammed, Aseel M. Aljeboree, A. Alkaim

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引用次数: 0

Abstract

In this research, polymer gels sodium alginate/bentonite clay adsorbent beads (SA/Ben) were prepared via encapsulating natural bentonite (Bn) in sodium alginate (SA). The ratio of Polymer Gels SA/Bn was used during preparation bead to yield beads (1/1 w/w), SA-Bn2 (1/2 w/w), and SA-Bn3 (1/3 w/w), respectively. These adsorbents were characterized via different characterisation FESEM, TEM, XRD and EDX to give high confidence of the prepared surface. The adsorption of Clonazepam drug (CLZ) from aqueous solution on the SA/Bn beads was investigated as a function of different factors, including the initial concentration of CLZ, the weight of SA/Bn beads gel, pH solution, temperature of solution and equilibrium time. Adsorption models of Langmuir and Freundlich isotherms were applied and were found to be well described via the isotherm of Freundlich model. The results showed that among the three types of prepared surfaces SA/Bn beads, SA-Bn1 presented the greatest CLZ adsorption capacity. Thermodynamic parameters were calculated including change free of Gibbs energy (ΔG), change entropy (ΔS), and change enthalpy. The change enthalpy of CLZ drug adsorption was found to be positive for the SA/Bn bead and the reaction of adsorption spontaneous and exothermic. After the adsorption proses the SA/Bn beads can easily be regenerated via water and re-used within four cycles.

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绿色吸附剂表面凝胶的合成：开发聚合物 SA/膨润土珠的配比制备及其在去除水污染物中的工业应用

本研究通过将天然膨润土（Bn）封装在海藻酸钠（SA）中，制备了聚合物凝胶海藻酸钠/膨润土粘土吸附珠（SA/Ben）。在制备珠子时，聚合物凝胶 SA/Bn 的比例分别为 1/1 w/w）、SA-Bn2（1/2 w/w）和 SA-Bn3（1/3 w/w）。这些吸附剂通过不同的表征方法如 FESEM、TEM、XRD 和 EDX 进行了表征，使制备的表面具有很高的可信度。研究了水溶液中氯硝西泮药物（CLZ）在 SA/Bn 珠子上的吸附量与不同因素的关系，包括 CLZ 的初始浓度、SA/Bn 珠子凝胶的重量、溶液的 pH 值、溶液的温度和平衡时间。应用 Langmuir 和 Freundlich 等温线吸附模型，发现 Freundlich 等温线模型能很好地描述吸附过程。结果表明，在制备的三种表面 SA/Bn 珠中，SA-Bn1 对 CLZ 的吸附能力最强。热力学参数包括自由吉布斯能变化（ΔG）、熵变化（ΔS）和焓变化。结果发现，SA/Bn 珠子吸附 CLZ 药物的变焓为正，吸附反应为自发放热反应。吸附反应结束后，SA/Bn 珠可以很容易地通过水再生，并在四个周期内重复使用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.