收稿日期: 2024-03-17
网络出版日期: 2024-11-27
基金资助
公路交通环境保护技术交通运输行业重点实验室开放课题资助项目(2020-8805)
Study on sulfate activation performance of electrolytic manganese residue in hydrated lime-slag system
Received date: 2024-03-17
Online published: 2024-11-27
电解锰渣(EMR)作为一种工业固体废弃物,含有大量重金属、氨氮及硫酸盐,对环境与人体健康造成巨大危害。为解决这一问题,利用EMR富含硫酸盐的特点,将其作为硫酸盐激发剂,研究了EMR对熟石灰-矿渣体系硫酸盐激发效果、水化机理、微观结构与污染物固化机理的影响。抗压强度、XRD及SEM-EDS测试研究表明,EMR对熟石灰-矿渣体系的激发效果较好,其最佳配比为:质量分数为50%的EMR、质量分数为46%的矿渣、质量分数为4%熟石灰,3、7、28 d抗压强度分别为15.55、27.44、44.52 MPa,相比未加EMR的熟石灰-矿渣体系,3、7、28 d抗压强度分别提升了1.65、1.80、1.97倍。在EMR激发下,熟石灰-矿渣体系的水化产物包括AFt(钙矾石)、C-(A)-S-H(水化硅铝酸钙),并且这些水化产物之间相互交织形成致密网络结构;而熟石灰-矿渣体系的主要水化产物是C-(A)-S-H,且其界面区域缝隙较大。EMR-熟石灰-矿渣体系水化过程中释放的OH-及形成的水化产物AFt、AFM(单硫型水化硫铝酸钙)、C-(A)-S-H能够对EMR中的重金属、氨氮进行离子置换、吸附、封裹与沉淀,最终使该体系浸出毒性满足《污水综合排放标准》(GB 8978—1996)的排放标准。
倪栋 , 唐亮 , 何兆益 , 王健 , 裴姗姗 , 夏磊 . 电解锰渣对熟石灰-矿渣体系硫酸盐激发性能研究[J]. 无机盐工业, 2024 , 56(11) : 151 -157 . DOI: 10.19964/j.issn.1006-4990.2024-0153
Electrolytic manganese residue(EMR),as an industrial solid waste,contains a large amount of heavy metals,ammonia nitrogen,and sulfates,posing great harm to the environment and human health.To address this issue,this study utilized the sulfate rich nature of EMR as a sulfate activator to investigate the sulfate activation effect,hydration mechanism,microstructure,and pollutant solidification mechanism of EMR in the hydrated lime-slag system.The results from compressive strength,XRD,and SEM-EDS testing showed that EMR had a positive effect on the sulfate activation of the limestone-slag system,with the optimal ratio of 50% EMR,46% slag,and 4% quicklime.The compressive strengths at 3 d,7 d,and 28 d were 15.55,27.44 and 44.52 MPa,respectively,which were 1.65,1.80 and 1.97 times higher compared to the limestone-slag system without EMR at the corresponding ages.Under EMR activation,the hydration products of the hydrated lime-slag system were AFt(ettringite) and C-(A)-S-H (calcium silicate hydrate),interwoven to form a dense network structure.Whereas the main hydration products of the hydrated lime-slag system were C-(A)-S-H with larger pores in the transition interface zone.The released OH- and the formation of hydrated products including AFt,AFM and C-(A)-S-H and
in the EMR-hydrated lime-slag system facilitated ion exchange,adsorption,encapsulation,and precipitation of heavy metals and ammonia nitrogen in EMR,ultimately meeting the leaching toxicity requirements of GB 8978—1996 emission standards.
| 1 | 何德军,舒建成,陈梦君,等.电解锰渣建材资源化研究现状与展望[J].化工进展,2020,39(10):4227-4237. |
| HE Dejun, SHU Jiancheng, CHEN Mengjun,et al.Current status and future prospects of electrolytic manganese residue reused as building materials[J].Chemical Industry and Engineering Progress,2020,39(10):4227-4237. | |
| 2 | 梁宇廷,孟棒棒,林晔,等.多种固废协同处理电解锰渣固锰除氨的最优配比及效果分析[J].环境工程学报,2023,17(7):2342-2351. |
| LIANG Yuting, MENG Bangbang, LIN Ye,et al.Optimal ratio and effect analysis of solidified manganese and ammonia removal from electrolytic manganese residue treated with various solid wastes[J].Chinese Journal of Environmental Engineering,2023,17(7):2342-2351. | |
| 3 | 杨晓红,薛希仕,张露露,等.电解锰渣盐酸浸取钙的动力学研究[J].无机盐工业,2021,53(1):82-86. |
| YANG Xiaohong, XUE Xishi, ZHANG Lulu,et al.Kinetics study of calcium leaching from electrolytic manganese residue by hydrochloric acid[J].Inorganic Chemicals Industry,2021,53(1):82-86. | |
| 4 | 董馨予,王海峰,贺跃,等.电解锰渣的浸出毒性分析及无害化处理[J].无机盐工业,2023,55(5):85-90. |
| DONG Xinyu, WANG Haifeng, HE Yue,et al.Exleaching toxicity analysis and harmless treatment of electrolytic manganese resid-ue[J].Inorganic Chemicals Industry,2023,55(5):85-90. | |
| 5 | 吴霜,王家伟,刘利,等.电解锰渣综合利用评述[J].无机盐工业,2016,48(4):22-25. |
| WU Shuang, WANG Jiawei, LIU Li,et al.Review on comprehensive utilization of electrolytic manganese slag[J].Inorganic Chemicals Industry,2016,48(4):22-25. | |
| 6 | 黄真江,赵瑜,侯俊宇,等.电解锰渣对混凝土抗压强度及孔结构的影响[J].混凝土与水泥制品,2023(10):100-102. |
| HUANG Zhenjiang, ZHAO Yu, HOU Junyu,et al.Effect of electrolytic manganese slag on compressive strength and pore structure of concrete[J].China Concrete and Cement Products,2023(10):100-102. | |
| 7 | 韩林沛.电解锰渣基缓释肥的制备及其性能研究[D].绵阳:西南科技大学,2023. |
| HAN Linpei.Preparation and properties of electrolytic manganese slag-based slow-release fertilizer[D].Mianyang:Southwest University of Science and Technology,2023. | |
| 8 | HE Dejun, SHU Jiancheng, WANG Rong,et al.A critical review on approaches for electrolytic manganese residue treatment and disposal technology:Reduction,pretreatment,and reuse[J].Journal of Hazardous Materials,2021,418:126235. |
| 9 | 母维宏,和森,周新涛,等.铜渣/电解锰渣基磷酸盐胶凝材料的制备及其形成机理探讨[J].化学工程,2020,48(10):23-28,51. |
| MU Weihong, HE Sen, ZHOU Xintao,et al.Preparation and mechanism of copper slag/electrolytic manganese residue-based phosphate cementitious materials[J].Chemical Engineering(China),2020,48(10):23-28,51. | |
| 10 | 张歆,刘方,朱健,等.基于电解锰渣-磷石膏复合胶凝材料的制备与表征[J].硅酸盐通报,2021,40(5):1610-1619. |
| ZHANG Xin, LIU Fang, ZHU Jian,et al.Preparation and characterization of composite cementitious material based on electrolytic manganese residue-phosphogypsum[J].Bulletin of the Chinese Ceramic Society,2021,40(5):1610-1619. | |
| 11 | 王亚光.粉煤灰/电解锰渣地质聚合物材料的制备及其性能研究[D].银川:北方民族大学,2018. |
| WANG Yaguang.Preparation and properties of fly ash/electrolytic manganese slag geopolymer material[D].Yinchuan:Beifang University of Nationalities,2018. | |
| 12 | TANG Liang, HE Zhaoyi, PEI Shanshan,et al.Hydration characteristics and pollutant solidification mechanism of full solid waste electrolytic manganese residue super sulfate cement[J].Journal of Building Engineering,2024,84:108563. |
| 13 | 周宏研,陈平,赵艳荣,等.电解锰渣对热焖钢渣活性的硫酸盐激发[J].无机盐工业,2019,51(5):66-69. |
| ZHOU Hongyan, CHEN Ping, ZHAO Yanrong,et al.Sulfate activation of electrolytic manganese residue on heat-stewed steel slag activity[J].Inorganic Chemicals Industry,2019,51(5):66- 69. | |
| 14 | 王智,郭清春,蒋小花,等.电解锰渣对粉煤灰火山灰活性的硫酸盐激发[J].非金属矿,2011,34(4):5-8. |
| WANG Zhi, GUO Qingchun, JIANG Xiaohua,et al.Sulphate activating of electrolytic manganese residue to fly ash[J].Non-Metallic Mines,2011,34(4):5-8. | |
| 15 | XU Yingtang, LIU Xiaoming, ZHANG Yuliang,et al.Investigation on sulfate activation of electrolytic manganese residue on early activity of blast furnace slag in cement-based cementitious material[J].Construction and Building Materials,2019,229:116831. |
| 16 | RAHMAN M M, BASSUONI M T.Thaumasite sulfate attack on concrete:Mechanisms,influential factors and mitigation[J].Construction and Building Materials,2014,73:652-662. |
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