a Department of Nuclear Physics , Joint Institute for Nuclear Research , Dubna , Russia.
b Department of Nuclear Physics , Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering , Bucharest - Magurele , Romania.
Int J Phytoremediation. 2018 Jul 29;20(9):901-908. doi: 10.1080/15226514.2018.1448358.
The biosorption of zinc from model solution as well as wastewater by Arthrospira (Spirulina) platensis biomass was studied. Adsorption capacity of the biosorbent was investigated as a function of contact time between adsorbent and zinc, the initial metals and sorbent concentration, pH value, and temperature. The ability of Arthrospira biomass for zinc biosorption exhibited a maximum at the pH range 4-8. Equilibrium data fitted well with the Langmuir model as well as the Freundlich model with maximum adsorption capacity of 7.1 mg/g. The pseudo second-order model was found to correlate well with the experimental data. Different thermodynamic parameters, ΔG°, ΔH° and ΔS° were evaluated and it has been found that the sorption was feasible, spontaneous, and endothermic in nature. The process of zinc removal from industrial effluent was studied at different time of sorbat-sorbent interaction and different sorbent dosage. Maximum zinc removal (83%) was obtained at sorbent concentration 60 g/L during 1-h experiment. The results indicate that Arthrospira platensis biomass could be effectively used for zinc removal from industrial effluents.
研究了节旋藻（螺旋藻）生物质从模型溶液和废水中吸附锌的情况。考察了吸附剂与锌、初始金属和吸附剂浓度、pH 值和温度之间的接触时间对吸附剂吸附容量的影响。节旋藻生物质对锌的吸附能力在 pH 值为 4-8 的范围内达到最大值。平衡数据与 Langmuir 模型以及 Freundlich 模型拟合良好，最大吸附容量为 7.1mg/g。发现准二级模型与实验数据很好地相关。评估了不同的热力学参数ΔG°、ΔH°和ΔS°，发现吸附是可行的、自发的和吸热的。研究了在不同的吸附剂-吸附剂相互作用时间和不同的吸附剂剂量下从工业废水中去除锌的过程。在 1 小时的实验中，当吸附剂浓度为 60g/L 时，锌的去除率达到最大值（83%）。结果表明，节旋藻生物质可有效用于从工业废水中去除锌。
