copper removal from synthetic wastewater

Heavy metals are among the most toxic substances to the

environment. A lot of technique is developed to treat heavy metals including adsorption. The objective of the present work is to investigate the possibility of removing copper from aqueous solution under various operating conditions and to find the highest possible removal by using magnetic nanoparticles Fe2O3. The method is fast, simple, cheap, effective and safe for treatment of copper polluted waters. The range of the studied parameters are: pH 3-9, adsorbent dose (iron oxide nanoparticles10-70 mg), contact time (CT) 5-60 min, magnetic field strength (MFS) 1.5-5.5, and initial metal concentration(C0) 2-8 mg/L. Batch experiments were conducted using jar test apparatus in order to obtain the best conditions for Cu+2 removal.
The results indicated that the highest removal efficiency for copper is 82.35% under the following operating conditions: pH 5, CT 20 min, Dose 50 mg, MFS 3 T, and Cu+2 2 mg/l. It is found that the Langmuir adsorption model fairly fit the experimental data. The removal efficiency increases with the increase of adsorbent dose, the contact time, magnetic field strength while it decreases with the increase of initial Cu+2 concentration. It is found that the adsorption capacity increases with the increase of cu initial concentration and contact time while it decreases with the increase of adsorbent dose.

重金属作为环境中最具毒性的物质之一，其处理技术的研究备受重视，吸附法便是其中之一。本研究旨在探讨在多种操作条件下从水溶液中去除铜的可能性，并利用Fe2O3磁性纳米颗粒实现铜的最高去除率。该方法操作迅速、简便、成本低廉、高效且安全，适用于处理受铜污染的水体。研究参数范围包括：pH值3-9，吸附剂剂量（氧化铁纳米颗粒10-70 mg），接触时间（CT）5-60分钟，磁场强度（MFS）1.5-5.5特斯拉，以及初始金属浓度（C0）2-8 mg/L。通过使用烧杯试验装置进行批次实验，以获得Cu+2去除的最佳条件。实验结果表明，在以下操作条件下，铜的去除效率最高可达82.35%：pH值5，接触时间20分钟，剂量50 mg，磁场强度3特斯拉，以及Cu+2初始浓度2 mg/L。研究发现，Langmuir吸附模型与实验数据拟合良好。去除效率随吸附剂剂量、接触时间和磁场强度的增加而提高，而随初始Cu+2浓度的增加而降低。此外，吸附容量随初始铜浓度和接触时间的增加而提高，而随吸附剂剂量的增加而降低。