In this study, the biosorption and desorption of Cu(II), Co(II), and Zn(II) ions on biomass of the green alga Cladophora sericea was examined to highlight the potential use of this biomass in the manufacture of feed additives. The selection of Cu(II), Co(II), and Zn(II) ions for the experimental studies was done considering their importance for living organisms. Biosorption of metal ions on algal biomass was performed in batch systems, at different initial metal ion concentration and contact time, at pH 5.5, 8 g L⁻¹ biomass dosage and room temperature (21 ± 1 °C). The isotherm and kinetic parameters obtained by modelling the experimental data were used to evaluate the efficiency of biosorption processes. The high values of maximum biosorption capacities (21.18 mg Cu(II) g⁻¹; 14.18 mg Co(II) g⁻¹; and 33.78 mg Zn(II) g⁻¹) and low contact time (around 15 min) indicate the possible use of this biomass as metal ion carrier in the manufacture of feed additives. Desorption of retained metal ions from loaded algae biomass was also examined, as a function of contact time. For similarity with gastric juice, 10 mL of HCl (1 mM) was used as desorption agent. The experimental data indicate that the metal ion desorption takes place gradually in time, but the desorption efficiency did not exceed 51% for all studied metal ions, after 24 h of contact time. The low efficiency of desorption processes is undesirable in the manufacturing of feed additives, and to minimize this disadvantage, the addition of activated carbon (AC) is proposed in this study. Simple mixing of loaded algae biomass with AC in a mass ratio of 1:1 determines the increase of desorption efficiency for all studied metal ions and opens new possibilities for the use of enriched algae biomass in the manufacture of feed additives.

在这项研究中，研究了Cu（II），Co（II）和Zn（II）离子在绿藻绢丝藻生物量上的生物吸附和解吸，以突出这种生物量在饲料添加剂生产中的潜在用途。考虑到它们对生物体的重要性，在进行实验研究时选择了Cu（II），Co（II）和Zn（II）离子。在不同的初始金属离子浓度和接触时间，pH 5.5、8 g L ^-1生物质剂量和室温（21±1°C）下，分批系统对藻类生物质上的金属离子进行生物吸附。通过模拟实验数据获得的等温线和动力学参数用于评估生物吸附过程的效率。最大的最大生物吸附容量（21.18 mg Cu（II）g^-1 ; 14.18 mg Co（II）g ^-1；和33.78 mg Zn（II）g ^-1）和较短的接触时间（约15分钟）表明该生物质可以用作饲料添加剂生产中的金属离子载体。还根据接触时间对残留金属离子从负载藻类生物质中的解吸进行了检测。为了与胃液相似，使用10 mL HCl（1 mM）作为解吸剂。实验数据表明，在接触24小时后，金属离子的解吸随时间逐渐发生，但对于所有研究的金属离子，解吸效率均未超过51％。解吸过程的低效率在饲料添加剂的生产中是不希望的，并且为了最小化该缺点，本研究提出了添加活性炭（AC）的方法。以1的质量比将负载的藻类生物质与AC进行简单混合