Abstract

This research evaluated the adsorption of celestine blue (CB) onto a novel Solanum tuberosum waste-magnetite nanocomposite (Mt@STB), prepared by an ecofriendly impregnation of magnetite (Mt) nanoparticles onto Solanum tuberosum waste (STB). The adsorbents characterization revealed that Mt@STB had a surface area (18.92 m²/g), pHpzc (7.55), porous morphology as well as suitable functional groups for efficient sequestration of CB onto the composite. The SEM, XRD, and EDX showed successful incorporation of 31.21 nm average size Mt nanoparticles on Mt@STB. Faster kinetics of CB sequestration from the wastewater was obtained for Mt@STB (100 min) compared to STB (140 min). Among four isotherm models, the Langmuir exhibited the best fit with R² > 0.9971 and sum square errors (SSE) < 0.0151. The pristine STB and Mt@STB composite showed maximum monolayer CEB uptake of 7.61 and 9.02 mg/g, as well as optimum removal of 73.8 and 84.7%, respectively. The pseudo-second-order model was more suitable in the kinetic description, while thermodynamics revealed a physical, spontaneous, and endothermic CB uptake. Besides, the efficacy of the composite for CB was confirmed from efficient regeneration over three adsorption/desorption cycles, which specified the viability of Mt@STB as a sustainable material for the decontamination of CB polluted water.

NOVELTY STATEMENT The adsorption of dyes from wastewaters has been widely studied due to the harmful effects on the ecosystem. However, research on the removal of celestine blue (CB) dye is rare despite its wide use in the nuclear and textile industries. Until date, there is no report on the adsorption of CB on biomaterial via biosorption. Therefore, the biosorption behavior of CB is presently unknown. Hence, this study reports the biosorption of CB onto a biosorbent (Solanum tuberosum peel [STB]) in an attempt to understand its biosorption behavior. Besides, the impregnation of magnetite (Mt) nanoparticles has been reported to enhance the uptake of most adsorbents for dye. To the best of our knowledge, such magnetic nanoparticle impregnation of STB has not been reported. We, therefore, synthesized a novel biowaste-magnetite composite (Mt@STB) and evaluated its potentials for the uptake as well as its reuse for CB biosorption.

抽象的

这项研究评估了通过将磁铁矿（Mt）纳米粒子生态环保地浸渍到马铃薯tube废（STB）上而制备的新型新型马铃薯waste废磁铁矿纳米复合材料（Mt @ STB）对天青蓝（CB）的吸附。吸附剂的表征表明，Mt @ STB具有表面积（18.92 m ² / g），pHpzc（7.55），多孔形态以及合适的官能团，可将CB有效地螯合到复合材料上。SEM，XRD和EDX显示在Mt @ STB上成功掺入了平均粒径为31.21 nm的Mt纳米颗粒。与STB（140分钟）相比，Mt @ STB（100分钟）从废水中螯合CB的动力学更快。在四种等温模型中，Langmuir表现出与R最匹配² > 0.9971，平方和误差（SSE）<0.0151。原始的STB和Mt @ STB复合材料显示最大单层CEB吸收为7.61和9.02 mg / g，最佳去除率分别为73.8和84.7％。拟二级模型更适合动力学描述，而热力学显示出物理，自发和吸热的CB吸收。此外，复合材料对CB的功效在三个吸附/解吸循环中得到了有效的再生，这证实了Mt @ STB作为CB污水净化的可持续材料的可行性。

创新声明由于对生态系统的有害影响，人们已广泛研究了废水中染料的吸附。然而，尽管其在核工业和纺织工业中的广泛应用，但很少有关于去除天青蓝（CB）染料的研究。迄今为止，还没有关于通过生物吸附将CB吸附在生物材料上的报道。因此，目前尚不清楚CB的生物吸附行为。因此，本研究报告了CB在生物吸附剂（马铃薯）上的生物吸附。试图了解其生物吸附行为。此外，据报道，磁铁矿（Mt）纳米颗粒的浸渍可增强大多数染料吸附剂的吸收。据我们所知，尚未报道STB的磁性纳米粒子浸渍。因此，我们合成了一种新型的生物废物-磁铁矿复合材料（Mt @ STB），并评估了其吸收潜力以及可用于CB生物吸附的再利用。