Review
Environmental Sciences
Yunmeng Pang, Jianlong Wang
Summary: This paper discusses the issue of nitrate pollution in water and wastewater, as well as the use of various electron donors for biological denitrification. Depending on the types of electron donors, denitrification can be classified into heterotrophic and autotrophic denitrification.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Aylin Ebru Yenilmez, Selin Ertul, Tulay Yilmaz, Deniz Ucar, Francesco Di Capua, Erkan Sahinkaya
Summary: In this study, the simultaneous removal of PNP and NO3- was investigated under autotrophic and heterotrophic denitrifying conditions. The results showed that autotrophic denitrification with elemental sulfur can efficiently eliminate both PNP and NO3-, even at high concentrations. ORP was identified as a possible control parameter to modulate PNP removal efficiency. Additionally, the autotrophic column showed better resiliency compared to the heterotrophic one.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Ruihua Li, Mengsha Guan, Wei Wang
Summary: This study demonstrates that pyrrhotite can effectively remove arsenite and nitrate from groundwater, with the PAD technology providing a simple and cost-effective way for remediation. The PSLAD biofilter achieved good removal efficiency under a hydraulic retention time of 6 hours, showing the potential for practical application in addressing co-contaminated groundwater.
Article
Environmental Sciences
Xianxin Luo, Chengyi Peng, Penghui Shao, Aiping Tang, Anping Huang, Qi Wu, Longhui Sun, Liming Yang, Hui Shi, Xubiao Luo
Summary: The IHAD-MnO process developed in this study shows potential for high nitrate removal efficiency and manganese oxidation efficiency in organic-limited polluted water. It provides a highly efficient and cost-effective solution for sustainable water treatment technologies with less carbon consumption and greenhouse gas emission.
ENVIRONMENTAL RESEARCH
(2021)
Article
Multidisciplinary Sciences
Zhenguo Chen, Minlan Lou, Peizhen Fang, Dunquan Xiao, Wenting Zhu, Hongwei Chen, Wei Qian
Summary: This study investigates the structure and function of sulfur autotrophic denitrification microbial communities using sodium thiosulfate and elemental sulfur as electron donors. The results show that the nitrate removal rate and bacterial community structure are better in the sodium thiosulfate group compared to the elemental sulfur group. This research provides an experimental basis for improving the start-up time and operating cost of sulfur autotrophic denitrification systems and offers new prospects for further mechanistic analysis.
SCIENTIFIC REPORTS
(2023)
Article
Environmental Sciences
Na Li, Yong Li, Ruitao Lou, Hong Xu, Laraib Saeed
Summary: This study analyzed the effects of Fe(II) and organic carbon on nitrate reduction processes in lake sediments. The results showed that Fe(II) greatly promoted nitrate reduction at high temperatures, while the reduction rate decreased at low temperatures. The presence of organic carbon in sediments also influenced the nitrate reduction processes. Overall, the combination of Fe(II) and organic carbon played a significant role in nitrate reduction and nitrogen removal in lake systems.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Environmental Sciences
Ozlem Demir, Ayse Dilek Atasoy, Bedia Calis, Yakup Cakmak, Francesco Di Capua, Erkan Sahinkaya, Deniz Ucar
Summary: Nitrate contamination of groundwater is a global health concern. Autotrophic denitrification using biogenic sulfur as a substrate has emerged as a sustainable and efficient method for treating contaminated groundwater. However, the effects of moderate temperature and biomass concentration on the performance and fouling of the system were not previously investigated. The study found that optimal biomass levels can limit membrane fouling but also affect denitrification efficiency. The temperature decrease significantly reduced denitrification efficiency, which could be partly recovered through bioaugmentation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Yunyi Zha, Rui Wan, Mengqi Wu, Ping Ye, Liangtao Ye, Xiaoxiao Li, Haifeng Yang, Jingyang Luo
Summary: To address the shortage of carbon source in sewage, inorganic electron donors containing sulfur were added to the traditional heterotrophic denitrification process. However, the effects of these extraneous inorganic electron donors on heterotrophic denitrification were largely unknown. This study discovered a hormesis-like effect of ferrous sulfide (FeS, an inorganic electron donor) on Paracoccus denitrificans, where the removal efficiency of total nitrogen increased with low dosage of FeS but decreased with high dosage. The study also revealed that the influence of FeS on glucose utilization and bacterial growth exhibited a hormesis-like effect.
Article
Environmental Sciences
Shuangshuang Yao, Lei Liu, Shiyang Zhang, Xinhua Tang
Summary: A heterotrophic and autotrophic denitrification system was developed for groundwater nitrate removal. The system combined solid-phase heterotrophic denitrification and electrochemical hydrogen autotrophic denitrification, using polycaprolactone as a carbon source to enhance nitrate removal performance. The study investigated the denitrification performance, microbial community structure, and nitrogen metabolism. The results showed that the system achieved a high nitrate removal rate, promoted complete denitrification, and reduced nitrite accumulation. Key denitrifying bacteria were identified, and electrical stimulation was found to increase their abundance. The study demonstrated the potential of the developed system for groundwater nitrate removal.
Article
Agricultural Engineering
Xiao Huang, Chongsen Duan, Jianghua Yu, Wenyi Dong
Summary: The research found that the transformation process can effectively reduce nitrate nitrogen discharge concentration, but there may be nitrite nitrogen accumulation in the initial stages. Three dominant denitrification genera were identified, with heterotrophic denitrification showing more complex microbial interspecific interactions.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Zhao Li, Fadong Li, Qiuying Zhang, Jianqi Wang, Peifang Leng, Chao Tian, Xiaoyan Li
Summary: This study focused on evaluating the accumulation of NO3- and N2O in groundwater and its indirect emission factor under different land use types in Dexing, revealing that agricultural activities significantly affect the temporal and spatial variation of N2O in groundwater. Through comprehensive evaluation of anion conditions and N2O in groundwater, this study can help estimate indirect N2O emissions and constrain the global nitrogen budget.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
Yu Zhang, Yongtao He, Linchun Jia, Lei Xu, Zheng Wang, Yueling He, Ling Xiong, Xumeng Lin, Hong Chen, Gang Xue
Summary: By synergizing organic carbon source, thiosulfate, and zero-valent iron, efficient mixotrophic denitrification of oligotrophic secondary effluent can be achieved. Thiosulfate plays a vital role in promoting TN removal efficiency, while corrosion of Fe0 releases OH- to neutralize H+ from thiosulfate-driven denitrification, creating a suitable environment for denitrification. The coordination of thiosulfate and Fe0 maintains the dominance of Thiobacillus for denitrification.
Article
Agricultural Engineering
Shaohong Zheng, Xiangyin Liu, Xiangjing Yang, Hongen Zhou, Jin Fang, Siyuan Gong, Junfeng Yang, Jiannv Chen, Tiansheng Lu, Ming Zeng, Yujie Qin
Summary: By changing the molar ratio of influent C/N/S, this study explored the denitrification performance and microbial community in mixotrophic denitrification systems. The results showed that the joint action of several genera, including Thauera, Pacacoccus, Fusibacter Pseudoxanthomonas, Thiobacillus, Sulfurovum, and Sulfurimonas, contributed to efficient denitrification. The relative abundances of Thauera, Thiobacillus, and Sulfurimonas increased after the addition of S2-, indicating a potential mechanism for improving denitrification performance in mixotrophic systems.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Ruihua Li, Yongwei Zhang, Mengsha Guan
Summary: Pyrite autotrophic denitrification (PAD) is a promising method for nitrate removal, but the results of previous studies have been contradictory and the mechanism is unclear. This study investigated the mineral properties of two types of natural pyrite, their PAD performances, and microbial community shift in column reactors. The study found that the mineral property of pyrite caused the contradictory result of PAD, with the main crystal plane exposed and the chemical state of surficial sulfur and iron considered decisive parameters for PAD.
Article
Environmental Sciences
Shu-Sen Wang, Hao-Yi Cheng, Hao Zhang, Shi-Gang Su, Yi-Lu Sun, Hong-Cheng Wang, Jing-Long Han, Ai-Jie Wang, Awoke Guadie
Summary: By comparing sulfur autotrophic denitrification (SAD) and heterotrophic denitrification (HD) filters under identical conditions, this study found that while the start-up time of SAD filter is longer, it outperforms HD filter in terms of performance and cost, showcasing potential application prospects.
ENVIRONMENTAL RESEARCH
(2021)
Article
Chemistry, Physical
Shaobing Ge, Wangchang Geng, Xiaowei He, Jiawei Zhao, Bo Zhou, Libing Duan, Yaoguo Wu, Qiuyu Zhang
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2018)
Article
Environmental Sciences
Bo Zhou, Yaoguo Wu, Jiangwei Chan, Sichang Wang, Sihai Hu
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
(2019)
Article
Biodiversity Conservation
Bo Zhou, Yaoguo Wu, Jiangwei Chan, Sichang Wang, Zixia Qiao, Sihai Hu
HUMAN AND ECOLOGICAL RISK ASSESSMENT
(2019)
Article
Environmental Sciences
Bo Zhou, Yaoguo Wu, Zehong Zhang, Sichang Wang, Jiangwei Chan, Sihai Hu
ENVIRONMENTAL EARTH SCIENCES
(2019)
Article
Engineering, Environmental
Jin Qian, Mingkuan Zhang, Ran Jing, Linqin Bai, Bo Zhou, Mingjun Zhao, Xiangjun Pei, Li Wei, Guang-Hao Chen
Article
Environmental Sciences
Zixia Qiao, Yaoguo Wu, Jin Qian, Sihai Hu, Jiangwei Chan, Xiaoyan Liu, Ran Sun, Wendong Wang, Bo Zhou
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2020)
Article
Construction & Building Technology
Xiaxia Li, Bo Zhou, Liming Shen, Zhihui Wu
Summary: A study found that selecting suitable mattress materials can increase the interface temperature between the human body and mattress, thereby improving sleep quality. In colder climates, people tend to prefer a warm thermal sensation. More attention should be paid to thermal insulation of body extremities.
INDOOR AND BUILT ENVIRONMENT
(2021)
Article
Environmental Sciences
Bo Zhou, Zehong Zhang, Sichang Wang, Yaoguo Wu, Sihai Hu, Ran Sun
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
(2020)
Article
Environmental Sciences
Lin Fan, Bo Zhou, Sheng Zhang, Sihai Hu, Xiaohui Mi, Ran Sun, Yaoguo Wu
Summary: Mg-Al layered double oxides (LDOs) show high efficiency in adsorption removal of low-concentration Cr(VI), with adsorption effectiveness influenced by pH and anion competition. Experimental data fits well with pseudo-second-order and Freundlich models.
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
(2021)
Article
Environmental Sciences
Zehong Zhang, Le Wang, Bo Zhou, Sichang Wang, Lin Fan, Sihai Hu, Yaoguo Wu
Summary: The study demonstrated that synthetic schwertmannite has excellent adsorption capability for low-concentration fluoride, with optimal performance under specific conditions. The adsorption process is mainly dominated by chemical adsorption, facilitated by surface complexation and anion exchange reactions.
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
(2021)
Article
Environmental Sciences
Cong Lu, Bo Yang, Xing Cui, Sichang Wang, Chengtun Qu, Weiwei Zhang, Bo Zhou
Summary: This study focused on the white secondary mineral precipitate formed in acid mine drainage (AMD) at Jinduicheng Mine in China, characterizing it as an amorphous crystal with the main elements O, Al, S, F, OH-, and SO42-. The geochemical simulation using the PHREEQC software confirmed the white precipitate as basaluminite, which exhibits self-purification capacity in AMD by reducing ion content and enriching certain elements. The results contribute to a better understanding of secondary minerals and their environmental responses, with implications for environmental protection and sustainable development in mining areas.
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
(2021)