Removal of antibiotics from aqueous solutions: insights of competitive adsorption onto Ni-impregnated biochar of spent coffee grounds

IF 5.7 3区环境科学与生态学 Q1 WATER RESOURCES

Applied Water Science Pub Date : 2024-08-29 DOI:10.1007/s13201-024-02238-8

Ahmed S. El-Shafie, Rehab Mahmoud, Insharah Ahsan, Helmi Hamdi, Mohamed F. Shibl, Marwa El-Azazy

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Abstract

Antibiotics are among the most widely used pharmaceutically active compounds. Possessing the capability to adversely impact the ecological system, existence of antibiotics in the environment is an escalating concern. With the purpose of removing two widely used antibiotics efficiently from aqueous solutions, the competency of two biochar (BC)-based sorbents derived from spent coffee (SC) grounds was investigated. Both pristine (SCBC) and nickel (II) oxide-impregnated (Ni-SCBC) biochars were utilized as sustainable and cost-effective sorbents to remove daunorubicin (DAYN) and tigecycline (TIGY) from single synthetic aqueous solutions and binary combinations. Batch adsorption experiments were controlled implementing Box–Behnken design. The removal efficiency of Ni-SCBC was superior compared to SCBC (TIGY: 67.06%, DAYN: 94.30%). Results of characterizations showed that impregnation with NiO changed the degree of crystallization with a remarkable increase in the surface area from 49.23 m²/g in SCBC to 86.06 m²/g in Ni-SCBC. Adsorption of DAYN and TIGY (single solutions) conformed well to Freundlich, and Langmuir isotherms, respectively. A maximum adsorption capacity (q_max) of 136.62 mg/g (DAYN) and 73.15 mg/g (TIGY) was reported in single solutions, compared to 23.50 mg/g (DAYN) and 58.42 mg/g (TIGY) in binary mixture. Adsorption kinetics onto Ni-SCBC fitted well with the pseudo-second-order (PSO) and Elovich models. Acquired results demonstrated that SCBC and Ni-SCBC are promising adsorbents for remedying antibiotics.

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去除水溶液中的抗生素：废咖啡渣在镍浸渍生物炭上的竞争性吸附研究

抗生素是应用最广泛的药物活性化合物之一。抗生素具有对生态系统产生不利影响的能力，其在环境中的存在日益引起人们的关注。为了从水溶液中有效地去除两种广泛使用的抗生素，我们研究了从废咖啡渣（SC）中提取的两种基于生物炭（BC）的吸附剂的能力。原始生物炭（SCBC）和镍（II）氧化物浸渍生物炭（Ni-SCBC）都被用作可持续的、具有成本效益的吸附剂，用于从单一合成水溶液和二元组合溶液中去除daunorubicin（DAYN）和tigecycline（TIGY）。批量吸附实验采用盒-贝肯设计（Box-Behnken design）进行控制。与 SCBC 相比，Ni-SCBC 的去除率更高（TIGY：67.06%，DAYN：94.30%）。表征结果表明，NiO 的浸渍改变了结晶程度，表面积从 SCBC 的 49.23 m2/g 显著增加到 Ni-SCBC 的 86.06 m2/g。DAYN 和 TIGY（单溶液）的吸附分别符合 Freundlich 和 Langmuir 等温线。单溶液的最大吸附容量（qmax）为 136.62 毫克/克（DAYN）和 73.15 毫克/克（TIGY），而二元混合物的最大吸附容量（qmax）为 23.50 毫克/克（DAYN）和 58.42 毫克/克（TIGY）。Ni-SCBC 上的吸附动力学与伪二阶（PSO）和 Elovich 模型十分吻合。获得的结果表明，SCBC 和 Ni-SCBC 是很有前途的抗生素补救吸附剂。

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