Since dolochar is a sponge iron industry waste with limited reuse options, it is important to develop useful applications for this waste stream. Here, the adsorption efficiency of dolochar for copper (Cu) was evaluated under a varying parameters including adsorbent dose, contact time, initial concentration, pH, stirring rate and temperature, via batch analysis. Complete Cu removal (100%) with a maximum uptake capacity of 30 mg g⁻¹ was observed under optimised conditions of 60 mg L⁻¹ initial concentration, pH 5, 15 min contact time, 2 g L⁻¹ adsorbent dose and 120-rpm agitation. The adsorption of Cu by dolochar best fitted the Langmuir adsorption model indicating monolayer adsorption of Cu. Kinetics data obeyed a pseudo-second-order reaction with a moderate fit to the intraparticle diffusion model. Thermodynamic studies indicated that the adsorption of Cu by dolochar was an exothermic and spontaneous reaction. The feasibility of using dolochar for Cu-contaminated wastewater remediation was also assessed by treating a Cu industry wastewater sample with dolochar. Cu removal efficiency of 99.4% was observed from wastewater under optimised conditions, highlighting a new useful application for the use of dolochar.

由于dolochar是海绵铁行业的废物，回用选项有限，因此重要的是开发适用于该废物流的应用程序。在此，通过批量分析，在包括吸附剂剂量，接触时间，初始浓度，pH，搅拌速率和温度在内的各种参数下评估了白炭对铜（Cu）的吸附效率。在60 mg L ^-1初始浓度，pH 5、15分钟接触时间，2 g L ^-1的最佳条件下，观察到最大吸收量为30 mg g ^-1的铜的完全去除（100％）吸附剂剂量和120-rpm搅拌。dolochar对Cu的吸附最符合Langmuir吸附模型，表明Cu是单层吸附。动力学数据服从伪二级反应，适度适合粒子内扩散模型。热力学研究表明，白云石对铜的吸附是放热和自发反应。通过用白云石处理铜工业废水样品，也评估了使用白云石进行铜污染的废水修复的可行性。在优化的条件下，废水中的铜去除效率为99.4％，这突出显示了一种用于白云石的新有用应用。