The pollution of water bodies with ciprofloxacin (CF) and other antibiotics has resulted in undesirable characteristics, such as color, odor and microbial resistance in environmental waters. Using agricultural waste as biosorbents for the removal of antibiotics from wastewater is a promising treatment approach. This research was based on the treatment of CF-polluted water by utilizing acid-modified Dialium guineense (tamarind) seed waste (HA-DGS), prepared by hydrochloric acid treatment of Dialium guineense seed (DGS). HA-DGS exhibited a maximum CF uptake of 125 mg/g, which was higher than most adsorbents reported in the literature. The DGS and HA-DGS were characterized by the FTIR, SEM, EDX, TGA and BET analyses. The acid modification was optimized by the application of response surface methodology using central composite design. Batch methodology showed that HA-DGS had higher CF uptake than DGS at variations of pH, temperature, contact time, adsorbent dosage and CF concentration. The Freundlich isotherm with R² > 0.9795 was more applicable to both adsorbents, while DGS conformed to the pseudo-second-order kinetic (R² > 0.9939) and HA-DGS (R² > 0.9085), to the pseudo-first-order kinetics. Thermodynamics showed a physical and exothermic uptake of CF on the adsorbents. HA-DGS exhibited a maximum CF uptake of 125 mg/g, which was higher than most adsorbents reported in the literature. Quantum chemical parameters and condensed Fukui functions revealed efficient interaction between CF molecules and the prepared materials. Over 60% desorption of CF was obtained from the CF-loaded adsorbents using water and HCl solution. The results of this research showed HA-DGS as an efficient, low-cost, waste material that can be optimally valorized in the treatment of wastewater contaminated with CF.

环丙沙星（CF）和其他抗生素对水体的污染已导致不良特性，例如环境水中的颜色，气味和微生物抵抗力。使用农业废弃物作为生物吸附剂从废水中去除抗生素是一种很有前途的处理方法。这项研究是基于利用盐酸处理过的几内亚酸处理过的酸改性的几内亚（罗望子）种籽废料（HA-DGS）处理CF污染的水。种子（DGS）。HA-DGS的最大CF吸收量为125 mg / g，高于文献中报道的大多数吸附剂。通过FTIR，SEM，EDX，TGA和BET分析对DGS和HA-DGS进行表征。通过使用中心复合设计的响应面方法，对酸改性进行了优化。批处理方法表明，在pH，温度，接触时间，吸附剂剂量和CF浓度变化下，HA-DGS的CF吸收量均高于DGS。R ²  > 0.9795的Freundlich等温线更适用于两种吸附剂，而DGS符合拟二级动力学（R ²  > 0.9939）和HA-DGS（R ² > 0.9085），以拟一级动力学。热力学显示，CF对吸附剂的物理吸收和放热吸收。HA-DGS的最大CF吸收量为125 mg / g，高于文献中报道的大多数吸附剂。量子化学参数和缩合的Fukui函数揭示了CF分子与制备的材料之间的有效相互作用。使用水和HCl溶液，从装有CF的吸附剂中可获得超过60％的CF解吸。这项研究的结果表明，HA-DGS是一种高效，低成本的废料，可以在处理CF污染的废水时得到最佳的增值。