Influence of Operating Environments on Adsorptive Removal of Lead (Pb (II)) Using Banana Pseudostem Fiber: Isotherms and Kinetic Study

ABSTRACT

Natural fiber as adsorbents is an emerging trend in effluent treatments as the fibers are environmental friendly, abundantly available and superior to polymeric-based materials. In this study, fiber extracted from the banana pseudostem was tested as an adsorbent. The lead (Pb (II)) removal was assessed with various parameters, namely, pH, agitation speed, adsorbent dosage and contact time. Removal efficiency was found maximum in alkaline conditions (pH 10) with a contact time of 140 min. Its efficiency was further optimized for adsorbent dosage and agitation speed. Between the isothermic model and Temkin isotherm model predicted the conditions better by providing the highest respective coefficient of determination (R^{2 –} 0.9942). Similarly, the kinetics for adsorption was fitted well with pseudo-second-order kinetic model. Banana pseudostem fiber (BPF) could be a promising source and low-cost adsorbent to remove toxic heavy metals in industrial effluents.

GRAPHICAL ABSTRACT

摘要

天然纤维作为吸附剂是污水处理的一个新趋势, 因为天然纤维对环境友好、资源丰富、优于高分子材料. 本研究以香蕉假茎纤维为吸附剂. 考察了pH值、搅拌速度、吸附剂用量、接触时间等参数对Pb(II)的去除效果. 在pH值为10的碱性条件下、吸附时间为140min、 去除率最高. 进一步优化了吸附剂用量和搅拌速度. 在等温模型和Temkin等温线模型之间、通过提供最高的决定系数 (R2-0.9942) 来更好地预测条件. 同样、吸附动力学符合拟二级动力学模型. 香蕉假茎纤维(BPF)是一种很有前途的低成本吸附剂.

KEYWORDS:

• Pseudostem fiber
• effluent
• lead
• heavy metal
• kinetics
• environment

关键词:

• 假茎纤维
• 污水
• 领导
• 重金属
• 动力学
• 环境

Additional information

Funding

This work was supported by the Department of Biotechnology, Ministry of Science and Technology, Government of India [Grant: DBT- NER/AGRI/33/2016 (Group 6)].