Green grape marc biosorbents preparation for mercury removal in aqueous media

IF 1 4区 工程技术 Q4 CHEMISTRY, APPLIED
S. Del, Alvaro Maggio, Lucia Mergola
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引用次数: 0

Abstract

In this study, grape marc waste from Negroamaro (a South of Italy vine variety) winery production, were used for the preparation of biosorbents for Hg(II) removal in aqueous media. A green approach was used to develop a proper biosorbent through two different grape marc washing procedures. In particular, the common chloridric acid and the greener citric acid, were evaluated. Comparing the adsorption results, the biosorbent prepared using citric acid as washing agent (GM-CA) gave similar results to the biosorbent washed with HCl (GM-HCl) with a maximum adsorption capacity of 36.39 mg g-1. Isothermal studies revealed a heterogeneous physical adsorption of Hg(II) on the biosorbents. Moreover, FTIR analysis of the grape marc-based biosorbent without and with Hg(II), confirmed ionic interactions in the biosorbent that fit with a pseudo-second order kinetic model. No significant adsorption on the biosorbent was observed when two other heavy metals, copper(II) and nickel(II), previously studied for similar sorbents, were considered. Finally, reusability of GM-CA biosorbent was also demonstrated over three cycles. Thus, the green preparation approach used in this work can be considered suitable for development of grape marc-based biosorbents.
水介质中除汞用绿葡萄马克生物吸附剂的制备
在这项研究中,利用内格罗马罗(意大利南部葡萄品种)酿酒厂生产的葡萄渣制备生物吸附剂,用于去除水介质中的汞(II)。通过两种不同的葡萄标记清洗程序,采用绿色方法开发合适的生物吸附剂。特别对普通氯酸和绿色柠檬酸进行了评价。结果表明,以柠檬酸为洗涤剂制备的生物吸附剂(GM-CA)与以盐酸洗涤的生物吸附剂(GM-HCl)的吸附效果相近,最大吸附量为36.39 mg g-1。等温研究表明,汞(II)在生物吸附剂上具有非均匀的物理吸附。此外,FTIR分析了葡萄标记物生物吸附剂中不含Hg(II)和含Hg(II)的离子相互作用,证实了生物吸附剂中的离子相互作用符合准二级动力学模型。当考虑其他两种重金属,铜(II)和镍(II)时,没有观察到生物吸附剂对类似吸附剂的显著吸附。最后,GM-CA生物吸附剂的可重复使用性也在三个循环中得到了验证。因此,本研究中采用的绿色制备方法可被认为适合于葡萄标记物基生物吸附剂的开发。
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来源期刊
Chemical Industry & Chemical Engineering Quarterly
Chemical Industry & Chemical Engineering Quarterly CHEMISTRY, APPLIED-ENGINEERING, CHEMICAL
CiteScore
2.10
自引率
0.00%
发文量
24
审稿时长
3.3 months
期刊介绍: The Journal invites contributions to the following two main areas: • Applied Chemistry dealing with the application of basic chemical sciences to industry • Chemical Engineering dealing with the chemical and biochemical conversion of raw materials into different products as well as the design and operation of plants and equipment. The Journal welcomes contributions focused on: Chemical and Biochemical Engineering [...] Process Systems Engineering[...] Environmental Chemical and Process Engineering[...] Materials Synthesis and Processing[...] Food and Bioproducts Processing[...] Process Technology[...]
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