Kulkarni Rajeswari M, Vidya Shetty K, Srinikethan G
Department of Chemical Engineering, Ramaiah Institute of Technology, Bangalore, India E-mail:
Department of Chemical Engineering, National Institute of Technology, Surathkal, Karnataka, India.
Water Sci Technol. 2019 Mar;79(5):888-894. doi: 10.2166/wst.2019.090.
In the current study, utilization of industrial waste brewery sludge for the biosorption of nickel (II) and cadmium (II) has been explored. The suitable conditions for the effective removal of Ni (II) and Cd (II) from aqueous solutions were examined. The kinetic evaluation showed that the biosorption process using the sludge followed pseudo-second order kinetics. In the presence of a metal co-ion, competitive and preferential biosorption was observed. The Langmuir model and Freundlich model were able to describe the sorption equilibrium for biosorption of Ni (II) and Cd (II) ions in single and dual metal systems. The effects of co-ion concentrations onto mono-component isotherm parameters (Langmuir and Freundlich) were studied and the inhibitory effect of co-ion concentration was observed. The effective reusability of biomass was assessed by three cycles of sorption-desorption. The sludge, owing to its high biosorption intensity and large availability from the local supply, is a better biosorbent for the treatment of Ni (II) and Cd (II) contaminated water.
在当前研究中，已探索利用工业废弃物啤酒厂污泥对镍（II）和镉（II）进行生物吸附。研究了从水溶液中有效去除镍（II）和镉（II）的适宜条件。动力学评估表明，使用该污泥的生物吸附过程遵循准二级动力学。在存在金属共存离子的情况下，观察到了竞争性和优先生物吸附现象。朗缪尔模型和弗伦德里希模型能够描述单金属和双金属体系中镍（II）和镉（II）离子生物吸附的吸附平衡。研究了共存离子浓度对单组分等温线参数（朗缪尔和弗伦德里希）的影响，并观察到了共存离子浓度的抑制作用。通过三个吸附-解吸循环评估了生物质的有效可重复使用性。由于该污泥具有较高的生物吸附强度且本地供应量大，它是处理受镍（II）和镉（II）污染水的较好生物吸附剂。
