生物炭辅助湿法球磨锰渣增效吸附Sb(Ⅴ)
Synergistic adsorption of Sb(Ⅴ)using wet ball milling of manganese slag supported by biochar
陆红雨 1程红光 2Gratien Twagirayezu 1房鑫 1黄鉎岚 3邓林波 1吉波3
作者信息
- 1. 中国科学院地球化学研究所,环境地球化学国家重点实验室,贵州 贵阳 550081;中国科学院大学,北京 100049
- 2. 中国科学院地球化学研究所,环境地球化学国家重点实验室,贵州 贵阳 550081
- 3. 中国科学院地球化学研究所,环境地球化学国家重点实验室,贵州 贵阳 550081;长江大学资源与环境学院,湖北 武汉 430100
- 折叠
摘要
为提高废弃物锰渣Sb(Ⅴ)吸附效能,推动锰渣资源化利用,将生物炭和锰渣1:1混合辅助湿法球磨技术制备了球磨炭基锰渣复合材料(QBM),并结合材料理化性质、浸出毒性和Sb(Ⅴ)吸附性能进行探讨.结果表明,在固液比(材料:去离子水)1:6,转速150r/min室温持续8h湿法球磨下,复合材料pH值、电导率、阳离子交换容量和粒径各降低了9.7%、64%、15%、71%,同时Zeta电位更负,由-15mV降至-21mV(P<0.05).同时,湿法球磨将锰渣中锰离子和氨氮的浸出分别由415mg/L和82mg/L降至《污水综合排放标准》(GB 8978-1996)一级标准2mg/L和15mg/L以下,提高了复合材料安全性.此外,球磨将复合材料Sb(Ⅴ)去除率从 32%提升至 81%(P<0.05),增强了复合材料吸附性能.最后,本研究揭示了湿法球磨通过改善材料理化性质提高Sb(Ⅴ)吸附性能和安全性的影响规律,显示出生物炭辅助湿法球磨锰渣增效吸附Sb(Ⅴ)在治理环境锑污染领域的应用潜力,为资源化利用锰渣和缓解锰渣堆存带来的环境污染问题提供了理论支撑.
Abstract
This study used wet ball milling to synthesize ball-milled biochar-based manganese slag composites(QBM)with a 1:1ratio of biochar to manganese slag.The goal was to improve the adsorption efficiency of Sb(Ⅴ)and the resource utilization of waste manganese slag.Herein,physicochemical properties,leaching toxicity,and Sb(Ⅴ)adsorption properties of the composite materials were discussed.The composite materials exhibited a reduction of 9.7%,63.9%,15.2%,and 70.9%in pH value,conductivity,cation exchange capacity,and particle size,respectively,after being wet ball milled at room temperature for 8hours with a solid-liquid ratio of 1:6 and a rotation speed of 150r/min.Zeta potential significantly increased(P<0.05)between-15 and-21mV.Ball milling effectively reduced the leaching of manganese ions and ammonium nitrogen in the manganese slag from 415mg/L to 2mg/L and 82mg/L to 15mg/L,respectively,which is the levels below the standard"Integrated Wastewater Discharge Standard"(GB8978-1996).Moreover,the Sb(Ⅴ)removal rate significantly increased from 31.86%to 80.98%(P<0.05).Wet ball milling improved Sb(Ⅴ)adsorption efficiency and safety by enhancing the physicochemical properties of materials.This study suggests that biochar-assisted wet ball milling of manganese slag can effectively mitigate Sb(Ⅴ)antimony pollution in the environment.This provides the idea that manganese slag can be used as a resource to reduce environmental pollution.
关键词
生物炭/锰渣/湿法球磨/浸出/吸附/锑Key words
biochar/manganese slag/wet ball milling/leaching/adsorption/antimony引用本文复制引用
基金项目
国家重点研发计划(2020YFC1807700)
出版年
2024
NETL
NSTL
万方数据