Performance of sulfur/steel slag composite matrix in removing nitrate from surface water with low-carbon content
The accumulation of nitrogen pollutants can easily lead to eutrophication of water bodies, and NO3--N is one of the main nitrogen pollutants. A composite matrix of steel slag and elemental sulfur was used for sulfur autotrophic denitrification. SEM was used to observe the surface morphology and micr...
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Editorial Office of Industrial Water Treatment
2025-01-01
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| Series: | Gongye shui chuli |
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| Online Access: | https://www.iwt.cn/CN/10.19965/j.cnki.iwt.2023-1149 |
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| author | PENG Xianchun ZHENG Lili LU Haoran WANG Zhefeng ZHU Zheng LIANG Wenyan |
| author_facet | PENG Xianchun ZHENG Lili LU Haoran WANG Zhefeng ZHU Zheng LIANG Wenyan |
| author_sort | PENG Xianchun |
| collection | DOAJ |
| description | The accumulation of nitrogen pollutants can easily lead to eutrophication of water bodies, and NO3--N is one of the main nitrogen pollutants. A composite matrix of steel slag and elemental sulfur was used for sulfur autotrophic denitrification. SEM was used to observe the surface morphology and microbial adhesion growth on steel slag before and after use. XRD was used to compare the alkalinity difference between steel slag and limestone. Anaerobic bottle batch experiments were conducted to compare the denitrification performance of sulfur/steel slag and sulfur/limestone systems. The effects of mass ratio and dosage on the denitrification performance of sulfur/steel slag systems were explored, and the microbial community structure characteristics before and after sulfur autotrophic denitrification were analyzed. The results showed that steel slag contained abundant alkaline substances such as Ca(OH)2, CaCO3, CaO, MgO, Ca2SiO4, Ca3SiO5, and RO phase. The sulfur/steel slag system had stronger denitrification performance compared to the sulfur/limestone system. When the mass ratio of sulfur/steel slag was 1∶1 and dosages were 20 g, the denitrification effect of the system was the best, and the TN removal rate reached 92.5% on the 10th day, which was higher than 87.4% of the sulfur/limestone system. When the dosage of sulfur and steel slag exceeded 20 g, the system had no significant effect on improving the removal of TN and NO3--N. The analysis of microbial community structure showed that the microorganisms responsible for denitrification belonged to Proteobacteria and Bacteroidota. Compared with the sulfur/limestone system, the microbial diversity in the sulfur/steel slag system was more abundant and the microorganisms were more stable. |
| format | Article |
| id | doaj-art-31a74b361f574a71af305321b830bfd4 |
| institution | Kabale University |
| issn | 1005-829X |
| language | zho |
| publishDate | 2025-01-01 |
| publisher | Editorial Office of Industrial Water Treatment |
| record_format | Article |
| series | Gongye shui chuli |
| spelling | doaj-art-31a74b361f574a71af305321b830bfd42025-01-24T07:59:03ZzhoEditorial Office of Industrial Water TreatmentGongye shui chuli1005-829X2025-01-01451414810.19965/j.cnki.iwt.2023-11491005-829X（2025）01-0041-08Performance of sulfur/steel slag composite matrix in removing nitrate from surface water with low-carbon contentPENG Xianchun0ZHENG Lili1LU Haoran2WANG Zhefeng3ZHU Zheng4LIANG Wenyan5Beijing Key Laboratory of Water Pollution Source Control Technology, College of Environmental Science and Engineering, Beijing Forestry University, Beijing100083, ChinaChenghe Ruizheng Risk Management Consulting Co., Ltd., Beijing100041, ChinaBeijing Key Laboratory of Water Pollution Source Control Technology, College of Environmental Science and Engineering, Beijing Forestry University, Beijing100083, ChinaBeijing Key Laboratory of Water Pollution Source Control Technology, College of Environmental Science and Engineering, Beijing Forestry University, Beijing100083, ChinaBeijing Key Laboratory of Water Pollution Source Control Technology, College of Environmental Science and Engineering, Beijing Forestry University, Beijing100083, ChinaBeijing Key Laboratory of Water Pollution Source Control Technology, College of Environmental Science and Engineering, Beijing Forestry University, Beijing100083, ChinaThe accumulation of nitrogen pollutants can easily lead to eutrophication of water bodies, and NO3--N is one of the main nitrogen pollutants. A composite matrix of steel slag and elemental sulfur was used for sulfur autotrophic denitrification. SEM was used to observe the surface morphology and microbial adhesion growth on steel slag before and after use. XRD was used to compare the alkalinity difference between steel slag and limestone. Anaerobic bottle batch experiments were conducted to compare the denitrification performance of sulfur/steel slag and sulfur/limestone systems. The effects of mass ratio and dosage on the denitrification performance of sulfur/steel slag systems were explored, and the microbial community structure characteristics before and after sulfur autotrophic denitrification were analyzed. The results showed that steel slag contained abundant alkaline substances such as Ca(OH)2, CaCO3, CaO, MgO, Ca2SiO4, Ca3SiO5, and RO phase. The sulfur/steel slag system had stronger denitrification performance compared to the sulfur/limestone system. When the mass ratio of sulfur/steel slag was 1∶1 and dosages were 20 g, the denitrification effect of the system was the best, and the TN removal rate reached 92.5% on the 10th day, which was higher than 87.4% of the sulfur/limestone system. When the dosage of sulfur and steel slag exceeded 20 g, the system had no significant effect on improving the removal of TN and NO3--N. The analysis of microbial community structure showed that the microorganisms responsible for denitrification belonged to Proteobacteria and Bacteroidota. Compared with the sulfur/limestone system, the microbial diversity in the sulfur/steel slag system was more abundant and the microorganisms were more stable.https://www.iwt.cn/CN/10.19965/j.cnki.iwt.2023-1149sulfur autotrophic denitrificationsteel slagnitrate nitrogenmicrobial communities |
| spellingShingle | PENG Xianchun ZHENG Lili LU Haoran WANG Zhefeng ZHU Zheng LIANG Wenyan Performance of sulfur/steel slag composite matrix in removing nitrate from surface water with low-carbon content Gongye shui chuli sulfur autotrophic denitrification steel slag nitrate nitrogen microbial communities |
| title | Performance of sulfur/steel slag composite matrix in removing nitrate from surface water with low-carbon content |
| title_full | Performance of sulfur/steel slag composite matrix in removing nitrate from surface water with low-carbon content |
| title_fullStr | Performance of sulfur/steel slag composite matrix in removing nitrate from surface water with low-carbon content |
| title_full_unstemmed | Performance of sulfur/steel slag composite matrix in removing nitrate from surface water with low-carbon content |
| title_short | Performance of sulfur/steel slag composite matrix in removing nitrate from surface water with low-carbon content |
| title_sort | performance of sulfur steel slag composite matrix in removing nitrate from surface water with low carbon content |
| topic | sulfur autotrophic denitrification steel slag nitrate nitrogen microbial communities |
| url | https://www.iwt.cn/CN/10.19965/j.cnki.iwt.2023-1149 |
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