Silk Fibroin/Soursop Seed Bio-Adsorbent for Crystal Violet and Copper Metal Ion Removal

IF 0.9 Q3 ENGINEERING, MULTIDISCIPLINARY

Journal of Engineering and Technological Sciences Pub Date : 2022-09-16 DOI:10.5614/j.eng.technol.sci.2022.54.5.14

L. Ernawati, R. Wahyuono, A. Halim, N. Widiastuti, Audi Sabrina, Kurnia Handayani

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引用次数: 0

Abstract

Groundwater highly contaminated with organic substances and heavy metal ions in the Kariangau Industrial Area, Balikpapan, East Kalimantan is indicated by the comparatively high COD. Therefore, the technology for treating wastewater to remove various toxins before releasing it into the environment needs to be advanced. Here, we present a green synthetic method of a composite adsorbent (SF/SS) using soursop seeds and silkworm cocoons. SEM, FTIR, and BET were used to analyze the physicochemical characteristics of the adsorbent. Mechanistic investigation of the SF/SS adsorbent performance for the removal of Cu2+ metal ions and crystal violet (CV) was conducted, while taking into account variables affecting adsorption properties. The Freundlich and Langmuir isotherm adsorption models were used to fit the adsorption equilibrium, while pseudo-first and second-order models were used to assess the adsorption kinetics. The mesoporous SF/SS adsorbent exhibited the highest adsorption capacities of 78.6 and 69.2 mg‧g-1, respectively. The pseudo-first model showed the best fit for CV removal with a kinetic rate of 0.0634 min-1, while the Freundlich model exhibited the best fitting for both of CV and Cu2+ removal. The results showed that SF/SS can be applied as an efficient adsorbent for both of heavy metal and organic dye removal.

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丝素/苏籽生物吸附剂去除结晶紫和铜离子

东加里曼丹巴里克帕潘Kariangau工业区的地下水被有机物和重金属离子高度污染，COD相对较高。因此，处理废水以在将其释放到环境中之前去除各种毒素的技术需要进步。在这里，我们提出了一种以酸腐种子和蚕茧为原料的复合吸附剂（SF/SS）的绿色合成方法。利用扫描电镜、红外光谱和BET分析了吸附剂的理化性质。考虑到影响吸附性能的变量，对SF/SS吸附剂去除Cu2+金属离子和结晶紫（CV）的性能进行了机理研究。Freundlich和Langmuir等温线吸附模型用于拟合吸附平衡，而伪一阶和二阶模型用于评估吸附动力学。中孔SF/SS吸附剂的吸附量最高，分别为78.6和69.2 mg·g-1。伪第一模型对CV去除表现出最佳拟合，动力学速率为0.0634min-1，而Freundlich模型对CV和Cu2+的去除表现出最优拟合。结果表明，SF／SS是一种有效的重金属和有机染料吸附剂。

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来源期刊

Journal of Engineering and Technological Sciences ENGINEERING, MULTIDISCIPLINARY-

CiteScore

2.30

自引率

11.10%

发文量

审稿时长

24 weeks

期刊介绍： Journal of Engineering and Technological Sciences welcomes full research articles in the area of Engineering Sciences from the following subject areas: Aerospace Engineering, Biotechnology, Chemical Engineering, Civil Engineering, Electrical Engineering, Engineering Physics, Environmental Engineering, Industrial Engineering, Information Engineering, Mechanical Engineering, Material Science and Engineering, Manufacturing Processes, Microelectronics, Mining Engineering, Petroleum Engineering, and other application of physical, biological, chemical and mathematical sciences in engineering. Authors are invited to submit articles that have not been published previously and are not under consideration elsewhere.