Division of Computational Mathematics and Engineering, Institute for Computational Science, Ton Duc Thang University, Ho Chi Minh City, Vietnam; Faculty of Environment & Labour Safety, Ton Duc Thang University, Ho Chi Minh City, Vietnam.
Center for Advanced Chemistry, Institute of Research and Development, Duy Tan University, Da Nang, Vietnam.
J Environ Manage. 2019 Dec 1;251:109556. doi: 10.1016/j.jenvman.2019.109556. Epub 2019 Sep 18.
In this study, chicken manure biochar (CBC) was prepared and applied as adsorbent for the removal of phenolic pollutants including phenol (Ph) and 2,4-Dinitrophenol (DNP) from wastewaters. The feasibility analysis was focused on the adsorption effects of various factors, such as initial concentration, adsorbent dosage and reaction time. The results showed that BC could efficiently remove the Ph and DNP within 90 min of reaction time. Increasing of CBC dosage up to 0.3 g results in the maximum removal efficiency of Ph and DNP and lowers initial concentration which is beneficial for the adsorption of phenolic compounds. The second-order kinetic model and the Langmuir isotherm provided the best correlation with the adsorption data. Based on the Langmuir isotherm, maximum adsorption capacities (q) of Ph and DNP were found at 106.2 and 148.1 mg g, respectively. The obtained q values for CB were higher than those reported in literature on the adsorption of Ph and DNP using different biochar. Analyzing the regeneration characteristics, BC displayed high reusability with less than 20% loss in adsorption capacities of Ph and DNP, even after five repeated cycles. Investigation of the adsorption equilibrium under various conditions suggested several possible interaction mechanisms, including hydrogen bonding, electrostatic interaction and π- π bonding, which were attributed to the binding affinity of the adsorbent-adsorbate interaction. In the field application, the CBC showed an excellent removal efficiencies of Ph and DNP from industrial wastewaters (around 80% phenolic pollutants were removed). These findings support the potential use of CBC as effective adsorbent for treatment of wastewater containing Ph and DNP.
在这项研究中，鸡粪生物炭 (CBC) 被制备并用作吸附剂，用于从废水中去除酚类污染物，包括苯酚 (Ph) 和 2,4-二硝基苯酚 (DNP)。可行性分析主要集中在各种因素的吸附效果上，如初始浓度、吸附剂用量和反应时间。结果表明，BC 可以在 90 分钟的反应时间内有效地去除 Ph 和 DNP。增加 CBC 用量至 0.3 g 可获得 Ph 和 DNP 的最大去除效率，并降低初始浓度，这有利于酚类化合物的吸附。二阶动力学模型和 Langmuir 等温线与吸附数据的相关性最好。根据 Langmuir 等温线，Ph 和 DNP 的最大吸附容量 (q) 分别为 106.2 和 148.1 mg/g。与文献中报道的使用不同生物炭对 Ph 和 DNP 的吸附相比，CB 的 q 值更高。分析再生特性，BC 表现出较高的可重复使用性，即使经过五次重复循环，Ph 和 DNP 的吸附容量损失也不到 20%。在各种条件下对吸附平衡的研究表明，几种可能的相互作用机制，包括氢键、静电相互作用和π-π键合，归因于吸附剂-吸附质相互作用的结合亲和力。在现场应用中，CBC 对工业废水中的 Ph 和 DNP 表现出优异的去除效率（约 80%的酚类污染物被去除）。这些发现支持将 CBC 用作处理含 Ph 和 DNP 的废水的有效吸附剂的潜力。
