This study aims to develop sustainable low-cost chitosan-based beads by a simple dropping method, with instantaneous formation by reticulation with tripolyphosphate anion. The beads were characterized and applied to basic blue 7 (BB7) uptake. The adsorption process was optimized through variation of several parameters in batch experiments such as bead loading, pH, dye concentration and temperature. At a BB7 concentration of 400 mg/L and 60 min, the best BB7 adsorption capacity (1410 mg/g) and partition coefficient (8.22 mg/g/μM) were achieved by chitosan beads, which were quite superior to others described in the literature. The obtained data best fitted to mixed- and pseudo-first order kinetic models and to Redlich-Peterson isothermal model. A fixed-bed column experiment was conducted and the adsorption capacity and partition coefficient at 100% breakthrough were 12.06 mg/g and 0.06 mg/g/μM. The bead storage study indicated that its adsorption capacity was not affected for a two-week period and reached 325 mg/g. Also, the presence of basic brown 4 (BB4) dye did not harm basic blue 7 in the simultaneous adsorption process and a removal capacity of 232 and 259 mg/g was reached for BB4 and BB7 dye, respectively. The presence of NaCl reduced the percentage of BB7 removal from 91% to 73%. The removal mechanism based on XPS, FTIR and BET analyses suggests that hydrogen bonds are the main adsorption mechanism followed by cation-exchange. This study gave rise to encouraging results and chitosan/tripolyphosphate beads proved to be potential adsorbents for industrial effluent treatments.

这项研究旨在通过一种简单的滴落方法开发可持续的，低成本的壳聚糖基微珠，并通过与三聚磷酸根阴离子的网状化而瞬时形成。对珠子进行表征并应用于碱性蓝7（BB7）摄取。通过分批实验中几个参数的变化来优化吸附过程，例如珠负载，pH，染料浓度和温度。在BB7浓度为400 mg / L和60分钟的条件下，壳聚糖微珠获得了最佳的BB7吸附容量（1410 mg / g）和分配系数（8.22 mg / g /μM），这要优于文学。获得的数据最适合混合一阶和伪一阶动力学模型以及Redlich-Peterson等温模型。进行了固定床柱实验，在100％穿透时的吸附容量和分配系数分别为12.06 mg / g和0.06 mg / g /μM。珠子储存研究表明，其吸附容量在两周内没有受到影响，达到325 mg / g。同样，碱性棕4（BB4）染料的存在在同时吸附过程中不会损害碱性蓝7，并且BB4和BB7染料的去除量分别达到232和259 mg / g。NaCl的存在将BB7去除率从91％降低到73％。基于XPS，FTIR和BET分析的去除机理表明，氢键是主要的吸附机理，其次是阳离子交换。该研究产生了令人鼓舞的结果，并且壳聚糖/三聚磷酸酯珠被证明是工业废水处理的潜在吸附剂。