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Dairy farm slurry is an important biomass resource that can be used as a fertilizer and in energy utilization and chemical production. This study aimed to establish an innovative ultrasound-assisted electrochemical oxidation (UAEO) digestion method for the rapid and onsite analysis of the heavy metal (HM) contamination level of dairy slurry. The effects of UAEO operating parameters on digestion efficiency were tested based on Cu and Zn concentrations in a dairy slurry sample. The results showed that Cu and Zn digestion efficiency was (96.8 ± 2.6) and (98.5 ± 2.9)%, respectively, with the optimal UAEO operating parameters (digestion time: 45 min; ultrasonic power: 400 W; NaCl concentration: 10 g/L). The digestion recovery rate experiments were then operated with spiked samples to verify the digestion effect on broad-spectrum HMs. When the digestion time reached 45 min, all digestion recovery rates exceeded 90%. Meanwhile, free chlorine concentration, particle size distribution, and micromorphology were investigated to demonstrate the digestion mechanism. It was found that 414 mg/L free chorine had theoretically enough oxidative ability, and the ultrasound intervention could deal with the blocky undissolved particles attributed to its crushing capacity. The results of particle size distribution showed that the total volume and bulky particle proportion had an obvious decline. The micromorphology demonstrated that the ultrasound intervention fragmented the bulky particles, and electrochemical oxidation made irregular blocky structures form arc edge and cellular structures. The aforementioned results indicated that UAEO was a novel and efficient method. It was fast and convenient. Additionally, it ensured digestion efficiency and thus had a good application prospect.
Chenyu Li; Bin Xue; Shang Wang; Xi Zhang; Chen Zhao; Xiaobo Yang; Run Zhao; Lin Dai; Shengqi Su; Haoqi Xu; Zhiqiang Shen; Zhigang Qiu; Jingfeng Wang. An Innovative Digestion Method: Ultrasound-Assisted Electrochemical Oxidation for the Onsite Extraction of Heavy Metal Elements in Dairy Farm Slurry. Materials 2021, 14, 4562 .
AMA StyleChenyu Li, Bin Xue, Shang Wang, Xi Zhang, Chen Zhao, Xiaobo Yang, Run Zhao, Lin Dai, Shengqi Su, Haoqi Xu, Zhiqiang Shen, Zhigang Qiu, Jingfeng Wang. An Innovative Digestion Method: Ultrasound-Assisted Electrochemical Oxidation for the Onsite Extraction of Heavy Metal Elements in Dairy Farm Slurry. Materials. 2021; 14 (16):4562.
Chicago/Turabian StyleChenyu Li; Bin Xue; Shang Wang; Xi Zhang; Chen Zhao; Xiaobo Yang; Run Zhao; Lin Dai; Shengqi Su; Haoqi Xu; Zhiqiang Shen; Zhigang Qiu; Jingfeng Wang. 2021. "An Innovative Digestion Method: Ultrasound-Assisted Electrochemical Oxidation for the Onsite Extraction of Heavy Metal Elements in Dairy Farm Slurry." Materials 14, no. 16: 4562.
Dichloroacetonitrile (DCAN) is one of the emerging nitrogenous disinfection by-products (DBPs) in drinking water. However, its potential toxicological effects remain poorly understood, especially at a low concentration found in the environment. In the present study, we investigated whether the consumption of low-concentration DCAN through drinking water would produce significant effects in male SD rats, with particular focus on their physiological traits and changes in their gut microbiome and metabolite profiles. After a 4-weeks DCAN intervention, significant changes were observed in the body weight, blood indices, and histology in DCAN-treated (100 μg/L) group. Proteobacteria was relatively less abundant in 20 and 100 μg/L DCAN-treated groups compared with that in the control group at phylum level. At genus level, Parasutterella and Anaerotruncus were significantly less abundant in both 20 and 100 μg/L DCAN-treated groups than that in the control group. Furthermore, the gut microbiota-related metabolites were dramatically perturbed after DCAN consumption. In the 20 and 100 μg/L DCAN-treated groups, there were 48 and 95 altered metabolites, respectively, and were found to be involved in sphingolipid signaling pathway, fatty acid biosynthesis, and cGMP−PKG signaling pathway. In summary, we demonstrated that consumption of low-concentration DCAN through drinking water could impair host health and induce gut microbiota dysbiosis and gut microflora-related metabolic disorders in male SD rats. Our findings highlight the potential toxicity of low-concentration DBPs and provide new insight into potential causal relationship between low concentration DBPs found in the drinking water and the host health.
Bin Xue; Kun Dai; Xi Zhang; Shang Wang; Chenyu Li; Chen Zhao; Xiaobo Yang; Zhuge Xi; Zhigang Qiu; Zhiqiang Shen; Jingfeng Wang. Low-concentration of dichloroacetonitrile (DCAN) in drinking water perturbs the health-associated gut microbiome and metabolic profile in rats. Chemosphere 2020, 258, 127067 .
AMA StyleBin Xue, Kun Dai, Xi Zhang, Shang Wang, Chenyu Li, Chen Zhao, Xiaobo Yang, Zhuge Xi, Zhigang Qiu, Zhiqiang Shen, Jingfeng Wang. Low-concentration of dichloroacetonitrile (DCAN) in drinking water perturbs the health-associated gut microbiome and metabolic profile in rats. Chemosphere. 2020; 258 ():127067.
Chicago/Turabian StyleBin Xue; Kun Dai; Xi Zhang; Shang Wang; Chenyu Li; Chen Zhao; Xiaobo Yang; Zhuge Xi; Zhigang Qiu; Zhiqiang Shen; Jingfeng Wang. 2020. "Low-concentration of dichloroacetonitrile (DCAN) in drinking water perturbs the health-associated gut microbiome and metabolic profile in rats." Chemosphere 258, no. : 127067.
Currently, due to abuse in the use of human antibiotics and the weak regulatory control that the authorities have over sewage discharge and manure management, antibiotic resistance genes (ARGs) have become a new type of environmental pollutant. Three different natural water bodies (Poyang Lake, Haihe River and Qingdao No.1 Bathing Beach seawater) were sampled during the same periods to conduct a longitudinal comparison of distribution. The distribution and expression of 11 ARGs in 20 species were studied, and the correlations between the expression and the distribution of time and space of the ARGs in different water bodies were also analyzed. With the exception of ermA, blaNDM-1 and vanA, which were not detected in seawater, the other ARGs could be detected in all three water bodies. Tetracycline resistance genes (tetC, tetM and tetQ) in the seawater and Haihe River had even reached 100%, and sulfa ARGs (sul1 and sul2) in the seawater and Poyang Lake, as well as sul2 and sul3 in the Haihe River, had also reached 100%. The ARG pollution in Haihe River was much more serious, since 14 and 17 of 20 ARG species were significantly higher compared with seawater and Poyang Lake, respectively. Some ARGs also had a high absolute abundance. The absolute abundance of macrolide resistance genes (ermB) in seawater was as high as 8.61 × 107 copies/L, and the anti-tuberculosis resistant genes (rpoB and katG) in the Haihe River Basin were highly abundant at 1.32 × 106 copies/L and 1.06 × 107 copies/L, respectively. This indicates that ARGs have gradually become more diverse and extensive in natural water bodies. The results of a redundancy analysis (RDA) of the three water bodies showed that although each water body is affected by different factors in space and time, overall, the presence of AGRs is closely related to the production and life of human beings and the migration of animals.
Sicong Su; Chenyu Li; Jiping Yang; Qunying Xu; Zhigang Qiu; Bin Xue; Shang Wang; Chen Zhao; Zhonghai Xiao; Jingfeng Wang; Zhiqiang Shen. Distribution of Antibiotic Resistance Genes in Three Different Natural Water Bodies-A Lake, River and Sea. International Journal of Environmental Research and Public Health 2020, 17, 552 .
AMA StyleSicong Su, Chenyu Li, Jiping Yang, Qunying Xu, Zhigang Qiu, Bin Xue, Shang Wang, Chen Zhao, Zhonghai Xiao, Jingfeng Wang, Zhiqiang Shen. Distribution of Antibiotic Resistance Genes in Three Different Natural Water Bodies-A Lake, River and Sea. International Journal of Environmental Research and Public Health. 2020; 17 (2):552.
Chicago/Turabian StyleSicong Su; Chenyu Li; Jiping Yang; Qunying Xu; Zhigang Qiu; Bin Xue; Shang Wang; Chen Zhao; Zhonghai Xiao; Jingfeng Wang; Zhiqiang Shen. 2020. "Distribution of Antibiotic Resistance Genes in Three Different Natural Water Bodies-A Lake, River and Sea." International Journal of Environmental Research and Public Health 17, no. 2: 552.