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Performance evaluation of solidification of Cr3+ or Ni2+ in industrial wastewater with Sorrel's cement
Wu, Chengyou1; Zhang, Huifang2; Yu, Hongfa1,3
2017-03-01
Source PublicationDESALINATION AND WATER TREATMENT
Volume68Pages:361-368
SubtypeArticle
AbstractSorrel's cement has been investigated as a means of solidifying Cr3+ or Ni2+ in wastewater. The setting time, compressive strength, water resistance, and leaching toxicity of solidified products of Sorrel's cement with Cr3+ or Ni2+ have been studied comprehensively to assess the applicability of Sorrel's cement in industrial wastewater treatment. Analysis of solidified products of Sorrel's cement with Cr3+ or Ni2+ was conducted by XRD, TG, FTIR, and SEM. Results demonstrate that the solidification of Cr3+ or Ni2+ inhibits the hydration process of Sorrel's cement. Results also indicate the inhibition of 5Mg(OH)(2)center dot MgCl2 center dot 5H(2)O (5 phase) formation, which is the main strength phase in Sorrel's cement, subsequently leading to the reduction of compressive strength of Sorrel's cement from 136 MPa to 67 MPa; the reduced compressive strength still far exceeds the standard value of 7 MPa. Additionally, the water resistance of cement solidified products also meets the requirements specified in the related standard. The leaching toxicity of Cr3+ or Ni2+ from solidified products of Sorrel's cement was also evaluated. The highest observed leaching concentration from solidified products reached 0.110 mg/L and 0.311 mg/L for Cr3+ and Ni2+, respectively, indicating that Sorrel's cement solidified products with Cr3+ or Ni2+ exhibits an acceptably low leaching toxicity.
KeywordSorrel's Cement Solidification Cr3++ Ni2++ Leaching Toxicity Compressive Strength Water Resistance
WOS HeadingsScience & Technology ; Technology ; Physical Sciences
WOS KeywordMAGNESIUM OXYCHLORIDE CEMENT ; HEAVY-METALS ; FLY-ASH ; STRENGTH ; SOILS ; ZN
Indexed BySCI
Language英语
WOS Research AreaEngineering ; Water Resources
WOS SubjectEngineering, Chemical ; Water Resources
WOS IDWOS:000403569900040
Citation statistics
Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/6227
Collection青海盐湖研究所知识仓储
盐湖资源综合利用工程技术中心
Affiliation1.Qinghai Univ, Sch Civil Engn, Xining 810016, Peoples R China
2.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China
3.Nanjing Univ Aeronaut & Astronaut, Dept Civil Engn, Nanjing 210016, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Wu, Chengyou,Zhang, Huifang,Yu, Hongfa. Performance evaluation of solidification of Cr3+ or Ni2+ in industrial wastewater with Sorrel's cement[J]. DESALINATION AND WATER TREATMENT,2017,68:361-368.
APA Wu, Chengyou,Zhang, Huifang,&Yu, Hongfa.(2017).Performance evaluation of solidification of Cr3+ or Ni2+ in industrial wastewater with Sorrel's cement.DESALINATION AND WATER TREATMENT,68,361-368.
MLA Wu, Chengyou,et al."Performance evaluation of solidification of Cr3+ or Ni2+ in industrial wastewater with Sorrel's cement".DESALINATION AND WATER TREATMENT 68(2017):361-368.
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