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Enhanced copper removal by magnesium modified biochar derived from Alternanthera philoxeroides
Environmental Research ( IF 7.7 ) Pub Date : 2024-03-19 , DOI: 10.1016/j.envres.2024.118652 Yingping Zhou 1 , Xiaoyu Wang 1 , Yu Yang 1 , Lijuan Jiang 1 , Xiaolin Wang 1 , Yuqiong Tang 1 , Lin Xiao 1
Environmental Research ( IF 7.7 ) Pub Date : 2024-03-19 , DOI: 10.1016/j.envres.2024.118652 Yingping Zhou 1 , Xiaoyu Wang 1 , Yu Yang 1 , Lijuan Jiang 1 , Xiaolin Wang 1 , Yuqiong Tang 1 , Lin Xiao 1
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Adsorption processes are being widely used by various researchers for the removal of heavy metals from waste streams and biochar has been frequently used as an adsorbent. In this study, a MgO-loaded biochar derived from (MAPB) was synthesized for the removal of Cu(II). Compared with other biochar absorbents, MAPB showed a relatively slow adsorption kinetics, but an effective removal of Cu(II) with a maximum sorption capacity of 1, 238 mg/g. The adsorption mechanism of Cu(II) by MAPB was mainly controlled by chemical precipitation as Cu(OH)NO, complexation and ion replacement. Fixed bed column with MAPB packed in same dosage (1, 000 mg) and different bed depth (1.3, 2.6 and 3.9 cm) showed that the increased of bed depth by mixing MAPB with quartz sand could increase the removal of Cu(II). The fitted breakthrough (BT) models showed that mixing MAPB with support media could reduce the mass transfer rate, increase the dynamic adsorption capacity and BT time. Therefore, MAPB adsorbent act as a highly efficient long-term adsorbent for Cu(II) contaminated water treatment may have great ecological and environmental significance.
中文翻译：
源自空心莲子草的镁改性生物炭增强铜去除效果
吸附过程被各种研究人员广泛用于从废物流中去除重金属，并且生物炭经常被用作吸附剂。在这项研究中，合成了一种源自 (MAPB) 的负载 MgO 的生物炭，用于去除 Cu(II)。与其他生物炭吸附剂相比，MAPB 显示出相对较慢的吸附动力学，但能有效去除 Cu(II)，最大吸附容量为 1, 238 mg/g。 MAPB对Cu(II)的吸附机理主要受Cu(OH)NO化学沉淀、络合和离子置换控制。相同剂量（1, 000 mg）和不同床深（1.3、2.6和3.9 cm）装填MAPB的固定床柱表明，MAPB与石英砂混合增加床深可以增加Cu(II)的去除。拟合突破（BT）模型表明，将MAPB与支撑介质混合可以降低传质速率，增加动态吸附容量和BT时间。因此，MAPB吸附剂作为一种高效长期吸附剂用于Cu(II)污染水处理可能具有重大的生态和环境意义。
更新日期：2024-03-19
中文翻译：
源自空心莲子草的镁改性生物炭增强铜去除效果
吸附过程被各种研究人员广泛用于从废物流中去除重金属，并且生物炭经常被用作吸附剂。在这项研究中，合成了一种源自 (MAPB) 的负载 MgO 的生物炭，用于去除 Cu(II)。与其他生物炭吸附剂相比，MAPB 显示出相对较慢的吸附动力学，但能有效去除 Cu(II)，最大吸附容量为 1, 238 mg/g。 MAPB对Cu(II)的吸附机理主要受Cu(OH)NO化学沉淀、络合和离子置换控制。相同剂量（1, 000 mg）和不同床深（1.3、2.6和3.9 cm）装填MAPB的固定床柱表明，MAPB与石英砂混合增加床深可以增加Cu(II)的去除。拟合突破（BT）模型表明，将MAPB与支撑介质混合可以降低传质速率，增加动态吸附容量和BT时间。因此，MAPB吸附剂作为一种高效长期吸附剂用于Cu(II)污染水处理可能具有重大的生态和环境意义。
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