Microbial Ecology Laboratory, Department of Environmental Science, School of Life Sciences, Periyar University, Salem, 636011, India.
Waste Management and Remediation Laboratory, Department of Environmental Science, School of Life Sciences, Periyar University, Salem, 636011, India.
Environ Sci Pollut Res Int. 2020 Jun;27(17):20757-20769. doi: 10.1007/s11356-020-08307-0. Epub 2020 Apr 4.
The present study focused on phosphorus adsorption by novel fungal conidiophores biomass in aqueous solution. Fungal Conidiophores biomass was prepared from the fungal strains Aspergillus oryzae (YFK) and Fusarium oxysporum (YVS2). The functional groups and morphology of Conidiophores Biomass (CB) from these strains were characterized by FTIR and SEM. FTIR confirms the presence of alcohol, carboxylic acid, carbon dioxide, cyclic alkene, amine, alkene, fluoro compound, and halo compound groups. Batch mode study was carried out with two CB's such as Aspergillus oryzae CB (ACB) and Fusarium oxysporum CB (FCB) with initial concentration of phosphorus ranging from 20 to 100 mg L. Based on the batch experiments, the adsorption kinetics (pseudo first order and pseudo second order), isotherms (Freundlich and Langmuir models), and thermodynamic (standard entropy, energy, and enthalpy) parameters were calculated. The adsorption kinetics and isotherm studies showed that the adsorption data well fitted with PSO kinetic model. From the isotherm results, it was found that ACB and FCB exhibited highest adsorption capacity 25.64 mg g and 26.32 mg g of phosphorus respectively at the optimal condition of pH (7), time (90 min), dose (250 mg), and room temperature (35 °C). Thermodynamics values were found to be endothermic and spontaneous in nature for phosphorus adsorption. Finally, the results suggested that the ACB and FCB are economically feasible cost-effective adsorbent for removal of phosphorus in wastewater treatment. Graphical abstract.
本研究关注的是新型真菌分生孢子生物质在水溶液中对磷的吸附。真菌分生孢子生物质是由真菌菌株米曲霉（YFK）和尖孢镰刀菌（YVS2）制备的。通过傅里叶变换红外光谱（FTIR）和扫描电子显微镜（SEM）对这些菌株的分生孢子生物质（CB）的官能团和形态进行了表征。FTIR 证实了醇、羧酸、二氧化碳、环烯烃、胺、烯烃、含氟化合物和卤代化合物基团的存在。采用批处理模式，使用两种 CB，即米曲霉 CB（ACB）和尖孢镰刀菌 CB（FCB），进行了初始磷浓度为 20 至 100 mg/L 的实验。基于批实验，计算了吸附动力学（拟一级和拟二级）、等温线（Freundlich 和 Langmuir 模型）和热力学（标准熵、能量和焓）参数。吸附动力学和等温线研究表明，吸附数据与 PSO 动力学模型拟合良好。从等温线结果可以看出，在最佳条件下（pH 值为 7、时间为 90 分钟、剂量为 250 毫克和室温为 35°C），ACB 和 FCB 对磷的吸附容量分别达到 25.64 和 26.32 mg/g。热力学值表明，磷的吸附是吸热和自发的。最后，结果表明，ACB 和 FCB 是经济可行且具有成本效益的废水处理除磷吸附剂。
