| 66 | 0 | 5 |
| 下载次数 | 被引频次 | 阅读次数 |
污泥焚烧灰中磷含量较高，加以提取回收能有效缓解磷的供需矛盾。研究了用硝酸从污泥焚烧灰中浸出磷，考察了硝酸浓度、浸出温度、浸出时间、液固体积质量比对磷浸出率的影响，并确定了磷浸出的限制性环节，建立了动力学方程。结果表明：在硝酸浓度1 mol/L、浸出温度298 K、浸出时间60 min、搅拌速度500 r/min、液固体积质量比40 mL/1 g条件下，磷浸出率达91.36%;内部扩散控制是磷浸出过程的限制环节，浸出反应活化能为2.11 kJ/mol。该法磷提取效率较高，是一种从污泥焚烧灰中回收磷的高效、可行技术，能为缓解磷资源供需矛盾提供一种重要的技术途径。
Abstract：The phosphorus content in sludge incineration ash is relatively high. Extracting and recovering it can effectively alleviate the contradiction between the supply and demand of phosphorus. Leaching of phosphorus from sludge incineration ash with nitric acid was studied.The effects of nitric acid concentration, leaching temperature, leaching time and the ratio of liquid volume to solid mass on the leaching rate of phosphorus were investigated.The restrictive links of phosphorus leaching were determined and the kinetic equation was established.The results show that under the conditions of nitric acid concentration of 1 mol/L,temperature of 298 K,leaching time of 60 min, stirring speed of 500 r/min, and liquid volume to solid mass ratio of 40 mL/1 g, the leaching rate of phosphorus reaches 91.36%.Internal diffusion control is the limiting link in the phosphorus leaching process, and the activation energy of the leaching reaction is 2.11 kJ/mol.The method has a relatively high phosphorus extraction efficiency. It is an efficient and feasible technology for recovering phosphorus from sludge incineration ash and can provide an important technical approach to alleviate the contradiction between supply and demand of phosphorus resources.
[1] LUYCKX L,CANEGHEM J V.Recovery of phosphorus from sewage sludge ash:influence of chemical addition prior to incineration on ash mineralogy and related phosphorus and heavy metal extraction[J].Journal of Environmental Chemical Engineering,2022,10(4).DOI:10.1016/j.seppur.2024.131314.
[2] 胡敏.我国磷化工产业发展现状及趋势[J].生态产业科学与磷氟工程，2025,40(1):1-7.HU Min.China′s phosphorus chemical industry development status and trends[J].Eco-industry Science & Phosphorus Fluorine Engineering,2025,40(1):1-7.
[3] 王向阳.剩余污泥焚烧灰分与盐卤协同资源化研究[D].北京：北京建筑大学，2024.
[4] 林治宏，唐婧.湿化学法从污泥焚烧灰中回收磷研究进展[J].辽宁化工，2024,53(7):1038-1044.LIN Zhihong,TANG Jing.Research progress in phosphorus recovery from sludge incineration ash using wet chemical method[J].Liaoning Chemical Industry,2024,53(7):1038-1044.
[5] 方佑东，赵帅兵，苏畅，等.钢渣溶出过程中浸出液pH值变化规律研究[J].矿业科学学报，2023,8(4):512-518.FANG Youdong,ZHAO Shuaibing,SU Chang,et al.Variation of pH value of leaching solution during steel slag dissolution[J].Journal of Mining Science and Technology,2023,8(4):512-518.
[6] HU S G,MA S Q,LI C,et al.Selective recovery of phosphorus from the leachate of incinerated sewage sludge ash using the Zr-modified acid-leaching residue as adsorbent for two-fold resource utilization[J].Chemical Engineering Journal,2023,477.DOI:10.1016/j.cej.2023.147174.
[7] YUAN Q,DUAN Y T,FAN L,et al.Efficient adsorption and mechanistic analysis of phosphorus in acid leaching solution of incinerated sewage sludge ash by zirconium-modified reed biochar[J].Separation and Purification Technology,2025,359(2).DOI:10.1016/j.seppur.2024.130535.
[8] WALDMüLLER W,HERDZIK S,GADERER M.Combined filtration and oxalic acid leaching for recovering phosphorus from hydrothermally carbonized sewage sludge[J].Journal of Environmental Chemical Engineering,2021,9(1).DOI:10.1016/j.jece.2020.104800.
[9] YANG Z H,DU C M,YUAN R Y,et al.Selective leaching and recovery of phosphorus from incinerated sewage sludge ash with CaO addition[J].Waste Management,2025,193:143-154.
[10] PETZET S,PEPLINSKI B,CORNEL P.On wet chemical phosphorus recovery from sewage sludge ash by acidic or alkaline leaching and an optimized combination of both[J].Water Research,2012,46(12):3769-3780.
[11] 杨怡君，何品晶，吕凡，等.污泥焚烧灰磷回收制备蓝铁矿[J].中国科学：化学，2022,52(7):1101-1111.YANG Yijun,HE Pinjing,LYU Fan,et al.Recovery of phosphorus from incinerated sewage sludge ash and preparation of vivianite[J].SCIENTIA SINICA Chimica,2022,52(7):1101-1111.
[12] 曾晓会.鸟粪石法回收剩余污泥释磷液及污泥焚烧灰酸浸液中磷的研究[D].武汉：华中科技大学，2018.
[13] FRANZ M.Phosphate fertilizer from sewage sludge ash (SSA)[J].Waste Management,2008,28(10):1809-1818.
[14] LIANG S,CHEN H M,ZENG X H,et al.A comparison between sulfuric acid and oxalic acid leaching with subsequent purification and precipitation for phosphorus recovery from sewage sludge incineration ash[J].Water Research,2019,159:242-251.
[15] BISWAS B K,INOUE K,HARADA H,et al.Leaching of phosphorus from incinerated sewage sludge ash by means of acid extraction followed by adsorption on orange waste gel[J].Journal of Environmental Sciences,2009,21(12):1753-1760.
[16] 胡少刚，张婧，杨武霖.基于湿化学技术从污泥焚烧灰中回收磷的研究进展[J].能源环境保护，2023,37(5):86-98.HU Shaogang,ZHANG Jing,YANG Wulin.Research progress on phosphorus recovery from incinerated sewagesludge ash based on wet-chemical techniques[J].Energy Environmental Protection,2023,37(5):86-98.
[17] 陈慧方，吴建，吕宁宁，等.钢渣中磷在盐酸中的浸出动力学研究[J].金属材料与冶金工程，2022,50(5):44-49.CHEN Huifan,WU Jian,LYU Ningning,et al.Study on kinetics of dephosphorization process of steel slag[J].Metal Materials and Metallurgy Engineering,2022,50(5):44-49.
[18] VO T P,ZHANG R C,RINTALA J,et al.Effect of thermochemical treatment of sewage sludge on its phosphorus leaching efficiency:insights into leaching behavior and mechanism[J].Waste Management,2024,190:24-34.
[19] 蒋盼.反应萃取分离对映体动力学及其传质特性研究[D].湘潭：湘潭大学，2017.
[20] 金会心，李军旗，吴复忠.含稀土磷矿酸解动力学及稀土浸出机理[J].北京科技大学学报，2011,33(9):1071-1078.JIN Huixin,LI Junqi,WU Fuzhong.Acidolysis kinetics and RE leaching mechanisms of RE-bearing phosphorite ores[J].Journal of University of Science and Technology Beijing,2011,33(9):1071-1078.
基本信息:
DOI：10.13355/j.cnki.sfyj.2025.05.011
中图分类号:X703
引用信息:
[1]程木易,王家凤,方佑东等.用硝酸浸出污泥焚烧灰中磷的动力学研究[J].湿法冶金,2025,44(05):660-665.DOI:10.13355/j.cnki.sfyj.2025.05.011.
基金信息:
国家自然科学基金资助项目(52074004)