Molecular characteristics of the refractory organic matter in the anaerobic and aerobic digestates of sewage sludge

Li, Xiaowei; Mei, Qingqing; Yan, Xiaofang; Dong, Bin; Dai, Xiaohu; Yu, Liangliang; Wang, Yibo; Ding, Guangwei; Fang, Yu; Zhou, John L.

doi:10.1039/c8ra05009k

Cited by 10 publications

(5 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 3b shows the high-resolution C1s spectra of HA and PHA. The binding energy peaks centered at 283.04, 283.82, 286.00, and 287.50 eV for HA and at 283.01, 283.76, 286.00, and 287.48 eV for PHA are assignable to C-C, C-H, C-O, and C=O, respectively (see Supplementary Table S3 online) [27][28][29][30] . Compared with HA, the relative amount of C-C in PHA decreased by 18.5%, while C-H increased by 29.6%, which indicated that the relative proportion of protonated C was higher than that of HA.…”

Section: Resultsmentioning

confidence: 99%

Combining humic acid with phosphate fertilizer affects humic acid structure and its stimulating efficacy on the growth and nutrient uptake of maize seedlings

Jing

Zhang

Yuan

et al. 2020

Sci Rep

View full text Add to dashboard Cite

This paper analyzed the compositional and structural changes of humic acid (HA) after combined with phosphate fertilizer (PHA), and investigated its effects on the growth of maize seedlings with four humic acid concentrations. The results showed that the atomic ratios of O/C and (O + N)/N of PHA were significantly lower than those of HA, which indicated that PHA had poor hydrophilicity compared with HA. The spectra of FTIR and NMR results suggested that the relative content of carboxyl group in PHA was higher than that in HA. X-ray photoelectron spectroscopy technology showed that the relative amount of C–C in PHA was lower than that in HA, while C–H was the opposite. The above changes were attributed to the crack of HA structure during the preparation of humic acid enhanced phosphate fertilizer, which was verified by the results from the determination of gel permeation chromatography that there were more low molecular weight components in PHA than that in HA. However, compared with HA, PHA showed a worse effect in promoting growth and the uptake of nitrogen, phosphorus and potassium by maize seedlings. This worse effect might be attributed to the poor hydrophilicity and unsuitable addition amount of PHA.

show abstract

Section: Resultsmentioning

confidence: 99%

Combining humic acid with phosphate fertilizer affects humic acid structure and its stimulating efficacy on the growth and nutrient uptake of maize seedlings

Jing

Zhang

Yuan

et al. 2020

Sci Rep

View full text Add to dashboard Cite

show abstract

“…The chemical composition of both feedstocks agree with a study that analyzed the chemical characteristics of sewage sludge and anaerobic digestate. 41 Physicochemical characteristics of SS and digestate are shown on Table 1.…”

Section: Methodsmentioning

confidence: 99%

Enhancing energy recovery of wastewater treatment plants through hydrothermal liquefaction

Cabrera

Barria

Camu

et al. 2023

Environ. Sci.: Water Res. Technol.

View full text Add to dashboard Cite

show abstract

“…Therefore, it is necessary to control the source of antibiotics, such as hospitals, pharmaceutical factories, etc. Common methods for the treatment of antibiotics include hydrogen peroxide oxidation, ozone oxidation, and electrochemical technology; however, there is no method to ensure the stable degradation of all antibiotics [39]. Therefore, the development of a method for online monitoring of the concentration of antibiotics described in this paper can help an advanced treatment system to adjust ozone aeration or drug dosage in time according to the monitoring results to achieve automatic control.…”

Section: Data Preprocessingmentioning

confidence: 99%

Detection Limits of Antibiotics in Wastewater by Real-Time UV–VIS Spectrometry at Different Optical Path Length

Wang

Yang

et al. 2022

Processes

View full text Add to dashboard Cite

Real-time monitoring of antibiotics in hospital and pharmaceutical wastewater using ultraviolet–visible (UV–Vis) spectroscopy is considered a promising method. Although gas chromatography–mass spectrometry (GC–MS) and other methods can detect antibiotics with quite low limits of detection (LOD), they possess various limitations. UV–Vis spectroscopy combined with chemometric methods is a promising choice for monitoring antibiotics. In this study, two immersed in situ UV–Vis sensors were used to explore the relationship between absorption spectra and antibiotics and study the influence of the optical path length on the LOD. The LODs of sensor 2 using a 10 cm optical path is up to 300 times lower than that of sensor 1 using a 0.5 mm optical path. Moreover, multiple antibiotics in the wastewater were investigated in real-time manner. The absorption spectra of 70 groups of wastewater samples containing different concentrations of tetracycline, ofloxacin, and chloramphenicol were measured. The results indicate that the nine wavelengths selected by interval partial least squares (iPLS) after the second derivative pretreatment have better predictability for ofloxacin and the six wavelengths selected by competitive adaptive reweighted sampling (CARS) after the first derivative. The multi-fold cross-validation results indicate that the model has a good predictive ability.

show abstract

Molecular characteristics of the refractory organic matter in the anaerobic and aerobic digestates of sewage sludge

Abstract: The chemical characteristics of the refractory organic matter in anaerobic and aerobic digestates are hardly known although they are significant for further improving the degradation of organic matter during sludge digestion.

Cited by 10 publications

References 51 publications

Combining humic acid with phosphate fertilizer affects humic acid structure and its stimulating efficacy on the growth and nutrient uptake of maize seedlings

Combining humic acid with phosphate fertilizer affects humic acid structure and its stimulating efficacy on the growth and nutrient uptake of maize seedlings

Enhancing energy recovery of wastewater treatment plants through hydrothermal liquefaction

Detection Limits of Antibiotics in Wastewater by Real-Time UV–VIS Spectrometry at Different Optical Path Length

Contact Info

Product

Resources

About