双孢蘑菇和废蘑菇堆肥对Cu(II)和Ni(II)去除效果的比较分析。

IF 3.4 4区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES
Nisha Sharma, Ankita
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引用次数: 0

摘要

目前,利用农业废弃物作为生物吸附剂去除重金属的趋势越来越大,因为它们效率高,经济可靠。本研究以双孢蘑菇(Agaricus bisporus mushroom, ABM)及其废弃蘑菇堆肥(SMC)样品作为生物吸附剂,研究并比较了它们对水溶液中Cu(II)和Ni(II)离子的去除效果。Cu (II)和Ni(II)的最佳吸附条件为pH为5,生物吸附剂用量为0.5 g/ 10 mL,接触时间为6 h,初始浓度分别为17和30µg/mL。拟二级动力学模型和Freundlich等温线模型(Cu(II)和Ni(II)分别为(R2 > 0.959和(R2 > 0.985))最能描述生物吸附数据。热力学分析揭示了生物吸附过程的自发和吸热性质。通过SEM, EDX和FTIR分析来确定金属的吸收量和负责金属生物吸附的官能团的存在。FESEM分析证实了表面形貌;EDX证实吸附后存在Cu(II)和Ni(II)峰;FTIR研究证实生物质中存在羟基、羧基、胺、磷酸盐和酰胺官能团。结果表明,SMC对Cu(II)的吸附效率为93.88%,对Ni(II)的吸附效率为88.5%,而ABM对Cu(II)的吸附效率为91.43%,对Ni(II)的吸附效率为86.63%,顺序为Cu(II) bb0 Ni(II),两者都是去除水中重金属的可行选择。此外,这两种生物吸附剂都表现出显著的再生和可循环性,高达8次吸附-解吸循环,对两种金属都有明显的吸附作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Comparative analysis of Cu(II) and Ni(II) removal using Agaricus bisporus mushroom and spent mushroom compost as biosorbents.

The use of agricultural waste products as biosorbents for the removal of heavy metals is inclining nowadays, as they are highly efficient and economically reliable. In the present study, Agaricus bisporus mushroom (ABM) and its spent mushroom compost (SMC) samples are used as biosorbents to find and compare their efficiency for the removal of Cu(II) and Ni(II) ions from aqueous solutions. The optimal conditions for maximum biosorption were obtained at pH 5, 0.5 g biosorbent dosage per 10 mL, 6 h of contact time, and initial concentration of 17 and 30 µg/mL for Cu (II) and Ni(II). Pseudo second order kinetic model, with (R2 > 0.999) for both the metals and Freundlich isotherm model with (R2 > 0.959) for Cu(II) and (R2 > 0.985) for Ni(II) best described the biosorption data. Thermodynamic analysis revealed the spontaneous and endothermic nature of the biosorption process. The SEM, EDX, and FTIR analysis were conducted to determine the metal uptake and presence of functional groups responsible for biosorption of metals. FESEM analyses has confirmed the surface morphology; the presence of Cu(II) and Ni(II) peaks after adsorption were confirmed by EDX; and the FTIR study confirmed the presence of hydroxyl, carboxyl, amine, phosphate, and amide functional groups in the biomass. The results demonstrated that SMC exhibited greater biosorption efficiency [93.88% for Cu(II) and 88.5% for Ni(II)] than ABM [91.43% for Cu(II) and 86.63% for Ni(II)], in order Cu(II) > Ni(II), making both viable options for the removal of heavy metals from aqueous medium. Furthermore, both the biosorbents have shown remarkable regeneration and recyclability up to eight adsorption-desorption cycles with appreciable adsorption for both the metals.

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来源期刊
International Journal of Phytoremediation
International Journal of Phytoremediation 环境科学-环境科学
CiteScore
7.60
自引率
5.40%
发文量
145
审稿时长
3.4 months
期刊介绍: The International Journal of Phytoremediation (IJP) is the first journal devoted to the publication of laboratory and field research describing the use of plant systems to solve environmental problems by enabling the remediation of soil, water, and air quality and by restoring ecosystem services in managed landscapes. Traditional phytoremediation has largely focused on soil and groundwater clean-up of hazardous contaminants. Phytotechnology expands this umbrella to include many of the natural resource management challenges we face in cities, on farms, and other landscapes more integrated with daily public activities. Wetlands that treat wastewater, rain gardens that treat stormwater, poplar tree plantings that contain pollutants, urban tree canopies that treat air pollution, and specialized plants that treat decommissioned mine sites are just a few examples of phytotechnologies.
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