Li Tianpeng, Sun Tingting, Liu Caiyi, Lin Li, Chen Zhan, Zhang Junfeng
College of City and Architecture Engineering, Zaozhuang University, Zaozhuang, 277160, Shandong, China.
State Key Laboratory of Crane Technology, Yanshan University, Qinhuangdao, 066000, Hebei, China.
Sci Rep. 2025 Mar 22;15(1):9983. doi: 10.1038/s41598-025-94780-x.
To address environmental challenges such as eutrophication caused by excessive phosphorus discharge and low resource utilization of solid waste, this study investigates the factors influencing the physical properties of ceramsite from solid waste (SW-ceramsite) through sintering method, and its adsorption performance. The results shown that under the optimal conditions of additive dosage 9 g/100 g mixture, sintering temperature 1100 °C, heating rate 10 °C/min, and holding time 5 min, the values of breaking and wear rates and void fraction were 0.35% and 69.6%, respectively. Grey relation analysis indicated that the additive dosage was the most influential factor, followed by sintering temperature and heating rate, with holding time being the least impact. The equilibrium adsorption capacity (q) of SW-ceramsite for phosphorus was 1.85 mg/g. The adsorption process was better described by the Freundlich adsorption isotherm, as well as by the pseudo-first-order and pseudo-second-order kinetic models, and was characterized as non-spontaneous and exothermic. After nine regeneration cycles, The q of SW-ceramsite decreased by only 0.185 mg/g, with a regeneration loss rate was just 4.988%, suggesting good reusability. The findings suggest that the SW-ceramsite holds promise for treatment of phosphorus-containing wastewater.
为应对磷排放过量导致的富营养化以及固体废物资源利用率低等环境挑战，本研究通过烧结法研究了影响固体废物陶粒（SW-陶粒）物理性能的因素及其吸附性能。结果表明，在添加剂用量9 g/100 g混合物、烧结温度1100℃、升温速率10℃/min、保温时间5 min的最佳条件下，破碎率、磨损率和孔隙率分别为0.35%和69.6%。灰色关联分析表明，添加剂用量是最具影响的因素，其次是烧结温度和升温速率，保温时间影响最小。SW-陶粒对磷的平衡吸附量（q）为1.85 mg/g。Freundlich吸附等温线以及准一级和准二级动力学模型能更好地描述吸附过程，其特征为非自发和放热。经过9次再生循环后，SW-陶粒的q仅下降了0.185 mg/g，再生损失率仅为4.988%，表明其具有良好的可重复使用性。研究结果表明，SW-陶粒在含磷废水处理方面具有应用前景。
