Journal of Environmental Health Science and Engineering ( IF 3.4 ) Pub Date : 2020-09-08 , DOI: 10.1007/s40201-020-00532-6 Indrajeet Kumar 1 , Priya Ranjan 2 , Abdur Rahman Quaff 2
The lower concentration of arsenic in the groundwater is serious health concerns of the people who are continuously taking from their drinking water. In this study, synthetic arsenic-contaminated water was prepared in the laboratory with varying concentrations of arsenic (100 to 1000 μg/L) and treated by nanosize adsorbent (copper oxide nanoparticles (CuO NPs)). The colloidal and powder form of CuO NPs were synthesized in the laboratory by the hydrothermal technique on a large scale and their shape and size were confirmed by XRD, FTIR, FESEM, and HRTEM analysis. It was found 30 ± 2 nm as size and spherical shape. The equilibrium adsorption of As (III) occurred at 90 min of contact time, pH 7.5, and 4 g/L adsorbent dosage. The maximum percent removal of As (III) was reached to 97.8, 94.6, 91.5, and 88.4% at an initial arsenic concentration of 100, 200, 500, and 1000 μg/L, respectively. The adsorption of As (III) followed pseudo-second-order kinetic and Freundlich isotherm model. Moreover, the overall cost of the synthesized CuO NPs (including material, operational, manpower, and transport cost with other overhead charges) was Rs. 281.832 g−1, which is lesser than the market price (Rs. 500.018 g−1). Hence, the optimized adsorption design would help for the efficient removal of As (III) from aqueous medium.
中文翻译:
CuO NPs 作为纳米级吸附剂的成本效益合成和表征,用于合成砷污染水中的 As (III) 修复
地下水中砷的浓度较低,这对不断从饮用水中摄取砷的人们来说是严重的健康问题。在这项研究中,在实验室中制备了合成砷污染水,其中含有不同浓度的砷(100 至 1000 μg/L),并用纳米级吸附剂(氧化铜纳米颗粒 (CuO NPs))进行处理。在实验室中通过水热技术大规模合成了胶体和粉末形式的 CuO NPs,并通过 XRD、FTIR、FESEM 和 HRTEM 分析确认了它们的形状和尺寸。发现大小和球形为 30 ± 2 nm。As (III) 的平衡吸附发生在接触时间为 90 分钟、pH 值为 7.5 和吸附剂剂量为 4 g/L 时。在初始砷浓度为 100 时,As (III) 的最大去除百分比分别达到 97.8、94.6、91.5 和 88.4%,分别为 200、500 和 1000 μg/L。As (III) 的吸附遵循准二级动力学和 Freundlich 等温线模型。此外,合成的 CuO NPs 的总成本(包括材料、操作、人力和运输成本以及其他间接费用)为卢比。281.832 克-1,低于市场价格(500.018 卢比-1卢比)。因此,优化的吸附设计将有助于从水性介质中有效去除 As (III)。