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Enhanced adsorption of Pb(II) by phosphorus-modified chicken manure and Chinese medicine residue co-pyrolysis biochar
Microscopy Research and Technique ( IF 2.0 ) Pub Date : 2022-07-23 , DOI: 10.1002/jemt.24210 Xi Chen 1 , Xiaoxuan Zhu 1 , Guangjian Fan 1 , Xu Wang 1 , Haibo Li 1 , Hui Li 2 , Xinyang Xu 1
Microscopy Research and Technique ( IF 2.0 ) Pub Date : 2022-07-23 , DOI: 10.1002/jemt.24210 Xi Chen 1 , Xiaoxuan Zhu 1 , Guangjian Fan 1 , Xu Wang 1 , Haibo Li 1 , Hui Li 2 , Xinyang Xu 1
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The pollution of lead (Pb (II)) to water resources is becoming more and more serious. It is always a difficult problem to find efficient and low-cost adsorbents. Chicken manure (CM) and Chinese medicine residue (CMR) were modified with potassium dihydrogen phosphate (KH2PO4) and pyrolyzed to obtain a modified material (PBC) for the treatment of Pb(II) in an aqueous solution. A variety of characterization analysis results could prove that KH2PO4 was successfully introduced to PBC. By adjusting the initial pH, the zeta potential of PBC varies from −3.2 to −43.1 mV, it could be seen that PBC had excellent applicability in the broad range pH value (1.0–6.0). Experimental and model results showed that R2 of the pseudo-first order kinetic model and the pseudo-second order kinetic model are greater than 0.99, indicating that that physical and chemical adsorption played a significant role in Pb(II) removal by PBC. An adsorption isotherm analysis showed that the adsorption capacity n in this study is greater than 1, confirming that PBC has a good adsorption effect on Pb (II). R2 of the Langmuir model of PBC is 0.981, and its maximum adsorption capacity of Pb(II) could reach 599.4 mg/g. Environmentally friendly PBC could be used as an effective adsorbent to remove Pb(II) from aqueous systems.
中文翻译：
磷改性鸡粪与中药渣共热解生物炭增强对Pb(II)的吸附
铅(Pb(II))对水资源的污染日益严重。寻找高效、低成本的吸附剂一直是一个难题。用磷酸二氢钾（KH 2 PO 4）对鸡粪（CM）和中药残渣（CMR）进行改性并热解，得到用于处理Pb（II）水溶液的改性材料（PBC）。多种表征分析结果可以证明KH 2 PO 4成功引入PBC。通过调节初始pH，PBC的zeta电位在-3.2到-43.1 mV之间变化，可以看出PBC在较宽的pH值范围（1.0-6.0）具有优异的适用性。实验和模型结果表明，R 2准一级动力学模型和准二级动力学模型的系数均大于 0.99，表明物理和化学吸附在 PBC 去除 Pb(II) 中起重要作用。吸附等温线分析表明，本研究中的吸附容量n大于1，证实了PBC对Pb(II)具有良好的吸附作用。PBC的Langmuir模型的R 2为0.981，其对Pb(II)的最大吸附量可达599.4 mg/g。环保的 PBC 可用作去除水系统中 Pb(II) 的有效吸附剂。
更新日期：2022-07-23
中文翻译：
磷改性鸡粪与中药渣共热解生物炭增强对Pb(II)的吸附
铅(Pb(II))对水资源的污染日益严重。寻找高效、低成本的吸附剂一直是一个难题。用磷酸二氢钾（KH 2 PO 4）对鸡粪（CM）和中药残渣（CMR）进行改性并热解，得到用于处理Pb（II）水溶液的改性材料（PBC）。多种表征分析结果可以证明KH 2 PO 4成功引入PBC。通过调节初始pH，PBC的zeta电位在-3.2到-43.1 mV之间变化，可以看出PBC在较宽的pH值范围（1.0-6.0）具有优异的适用性。实验和模型结果表明，R 2准一级动力学模型和准二级动力学模型的系数均大于 0.99，表明物理和化学吸附在 PBC 去除 Pb(II) 中起重要作用。吸附等温线分析表明，本研究中的吸附容量n大于1，证实了PBC对Pb(II)具有良好的吸附作用。PBC的Langmuir模型的R 2为0.981，其对Pb(II)的最大吸附量可达599.4 mg/g。环保的 PBC 可用作去除水系统中 Pb(II) 的有效吸附剂。
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