Abstract

Antibiotics in water bodies are emerging as an alarming new pollutant because of its persistent and recombinant nature. In recent period of human lifestyle, pharmaceutical products play a vital role in many perspectives. Due to this unpredictable usage of products, the unreacted components release into waterbodies in trace quantities. Eventhough these trace quantities initiate a crisis of developing resistant antibacterial strains which pose health risks to humans and animals. This work reports the batch adsorption of a fluoroquinolone, a fourth-generation antibiotic compound by a biosorbent made by acid-treated tamarind shells. The shells were treated with zinc chloride and hydrochloric acid. The characterization of biosorbent was performed by Fourier transform infrared spectroscopy and field emission scanning electron microscopy. The optimized adsorption parameters of time, pH and temperature were 30 minutes, 6 and 60 °C. The adsorbent can be reused up to seven times with negligible loss in its adsorption capacity. Adsorption followed by Langmuir, Freundlich and Tempkin model where used to determine the correlation coefficient. Pseudo first-order, second-order and intra-particle kinetic model were used to fit the experimental data. The results are best described by pseudo second-order denoting chemisorption and Freundlich isotherm model describing multilayer adsorption.

• Novelty Statement

• The proposed work is to investigate about improved tamarind shell as biomass used in the removal unreacted PPCP components that have been released into aquatic environment.

• The novelty of this paper lies in that it puts forward a better resource utilization method for treating PPCP component wastewater, and studies the method theoretically from the perspective of mechanism and proves its feasibility.

• Identifying the maximum adsorption of antibiotic component from wastewater under different conditions and finding the optimum range.

• In addition to the existing literatures, this study has compared the adsorption efficiency of raw and treated adsorbent material prepared using Tamarind shell.

摘要

水体中的抗生素因其持久性和重组性而成为一种令人担忧的新污染物。在人类生活方式的最近时期，药品在许多方面都发挥着至关重要的作用。由于产品的这种不可预测的使用，未反应的成分会以微量释放到水体中。尽管这些痕量引发了开发耐药性抗菌菌株的危机，这对人类和动物的健康构成威胁。这项工作报告了由酸处理的罗望子壳制成的生物吸附剂对第四代抗生素化合物氟喹诺酮的批量吸附。壳用氯化锌和盐酸处理。通过傅里叶变换红外光谱和场发射扫描电子显微镜对生物吸附剂进行表征。时间、pH 和温度的优化吸附参数分别为 30 分钟、6 和 60 ℃。吸附剂最多可重复使用七次，而吸附容量的损失可以忽略不计。吸附之后是 Langmuir、Freundlich 和 Tempkin 模型，用于确定相关系数。使用伪一级、二级和粒子内动力学模型来拟合实验数据。结果最好用伪二阶表示化学吸附和描述多层吸附的 Freundlich 等温线模型来描述。使用二级和粒子内动力学模型来拟合实验数据。结果最好用伪二阶表示化学吸附和描述多层吸附的 Freundlich 等温线模型来描述。使用二级和粒子内动力学模型来拟合实验数据。结果最好用伪二阶表示化学吸附和描述多层吸附的 Freundlich 等温线模型来描述。

• 新颖性声明

• 拟议的工作是研究改进的罗望子壳作为生物质用于去除已释放到水生环境中的未反应的 PPCP 成分。

• 本文的新颖之处在于提出了一种较好的资源化利用方法处理PPCP组分废水，并从机理的角度对该方法进行了理论研究并证明了其可行性。

• 确定不同条件下废水中抗生素成分的最大吸附量并找到最佳范围。

• 除现有文献外，本研究还比较了使用罗望子壳制备的原料和处理过的吸附材料的吸附效率。