A novel and simple chemically modified kenaf fiber functionalized with phosphoric acid was prepared to remove copper (II) ions from waste water water samples. Combination of kenaf fiber and phosphoric acid possess renewable, green and rapid removal for waste waters treatment. In the present study, the green adsorbent was thoroughly characterized with Fourier Transform Infrared Spectroscopy (FTIR), chemical composition analysis (CHNS), Brunauer-Emmett-Teller (BET) and Scanning Electron Microscopy (SEM). Moreover, the maximum adsorption capacity towards copper (II) ions were 57.14 mg/g. The adsorption isotherm follows Langmuir model and fitted with pseudo-second-order kinetics model. The enthalpy, entropy Gibbs free energy values show the adsorption fitted with non-spontaneous and endothermic reaction. The optimal desorption process was determined during the exposure with 1 M of hydrochloric acid (95.41%) followed by sulphuric acid (82.31%) and nitric acid (81.25%). After the 2nd cycle of reusability study, the adsorption capacity slightly dropped suggesting the adsorbent only can be used for once to continue its efficiency. Hence, the K-PA was confirmed to be highly adsorptive material and having promising applications in water purification application by the encounter with real waste water matrices obtained from the electroplating (88.2% removal) and wood treatment industries (61.5% removal).

制备了一种新颖，简单的经磷酸功能化的化学改性洋麻纤维，以去除废水中的铜离子。洋麻纤维和磷酸的结合具有可再生，绿色和快速去除的特点，可用于废水处理。在本研究中，绿色吸附剂已通过傅立叶变换红外光谱（FTIR），化学成分分析（CHNS），Brunauer-Emmett-Teller（BET）和扫描电子显微镜（SEM）进行了全面表征。此外，对铜（II）离子的最大吸附容量为57.14 mg / g。吸附等温线遵循Langmuir模型，并拟合伪二级动力学模型。焓，熵吉布斯自由能值表明吸附具有非自发吸热反应。在暴露于1 M盐酸（95.41％），硫酸（82.31％）和硝酸（81.25％）的过程中，确定了最佳的脱附过程。在第二个可重复使用性研究周期之后，吸附能力略有下降，这表明吸附剂只能使用一次才能继续发挥其效用。因此，通过接触从电镀（去除率达88.2％）和木材处理行业（去除率达61.5％）获得的真实废水基质，证实了K-PA是高吸附性材料，并在水净化应用中具有广阔的应用前景。吸附能力略有下降，表明该吸附剂只能使用一次以保持其效率。因此，通过接触从电镀（去除率达88.2％）和木材处理行业（去除率达61.5％）获得的真实废水基质，证实了K-PA是高吸附性材料，并在水净化应用中具有广阔的应用前景。吸附能力略有下降，表明该吸附剂只能使用一次以保持其效率。因此，通过接触从电镀（去除率达88.2％）和木材处理行业（去除率达61.5％）获得的真实废水基质，证实了K-PA是高吸附性材料，并在水净化应用中具有广阔的应用前景。