SCIENCE OF THE TOTAL ENVIRONMENT
·
2023
·
IF 9.8
Kai Yang,Mo-Lian Chen,Dong Zhu
Disinfectants are routinely used in human environments to control and prevent the transmission of microbial disease, and this is particularly true during the current COVID-19 crisis. However, it remains unclear whether the increased disinfectant loadings to wastewater treatment plants facilitate the dissemination of antibiotic resistance genes (ARGs) in sewage sludge microbiomes. Here, we investigated the impacts of benzalkonium chlorides (BACs), widely used disinfectants, on ARGs profiles and microbial community structures in sewage sludge by using high-throughput quantitative PCR and Illumina sequencing. A total of 147 unique ARGs and 39 mobile genetic elements (MGEs) were detected in all sewage sludge samples. Our results show that exposure to BACs disinfectants at environmentally relevant concentrations significantly promotes both the diversity and absolute abundance of ARGs in sludge microbiomes, indicating the co-selection of ARGs by BACs disinfectants. The enrichment of ARGs abundance varied from 2.15-fold to 3.63-fold compared to controls. In addition, BACs exposure significantly alters bacterial and protistan communities, resulting in dysbiosis of the sludge microbiota. The Mantel test and Procrustes analysis confirm that bacterial communities are significantly correlated with ARGs profiles under BACs treatments. The structural equation model explains 83.8 % of the total ARGs variation and further illustrates that the absolute abundance of MGEs exerts greater impacts on the variation of absolute abundance of ARGs than microbial communities under BACs exposure, suggesting BACs may promote antibiotic resistance by enhancing the horizontal gene transfer of ARGs across sludge microbiomes. Collectively, our results provide new insights into the proliferation of antibiotic resistance through disinfectant usage during the pandemic and highlight the necessity to minimize the environmental release of disinfectants into the non-target environment for combating antibiotic resistance.
研究领域:
环境科学
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微生物学
·
公共卫生
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产品关联
DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2023
·
IF 7
Jiawei Li,Jie Jin,Yunao Zhao,Ziwei Zou,Yunchao Wu,Jintao Sun,Jinxia Xia
The renewable utilization of phosphorus (P) in sewage sludge is greatly hindered by its low bioavailability . In this study, the co-hydrothermal treatment (co-HTT) of sewage sludge and biomass was conducted to enhance P bioavailability. The dehydration and decarboxylation of sludge organic matter were promoted by co-HTT as evidenced by FTIR and elemental analysis. XPS and XRD results showed that co-HTT facilitated the formation of Al/Fe phosphates in sludge. The results of Hedley's sequential extraction demonstrated that HTT at low temperatures (≤ 155 °C) enlarged the relative abundance of bioavailable P in the sludge from 72 % to as high as 80 % because of the decomposition of organic P. In contrast, at a high temperature of 185 °C, more bioavailable P was converted into insoluble and residual forms. The addition of rice straw in sludge during HTT resulted in a two-fold increase in exchangeable P content, suggesting that rice straw can effectively improve sludge P bioavailability. Cellulose exhibited less influence on sludge P bioavailability than lignin. After lignin addition, the relative abundance of bioavailable P in the sludge was further increased to 91 %, which could be attributed to the greater enhancement effect of lignin on the decomposition of sludge organic matter. These findings reveal that the co-HTT of sludge and lignin-containing biomass may be an effective strategy for improving sludge P bioavailability.
研究领域:
环境科学
·
废弃物资源化
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DOI
高影响因子
WASTE MANAGEMENT
·
2019
·
IF 5.431
Jun Zhang,Yu Bao,Yu Jiang,Hong-Tao Liu,Bei-Dou Xi,Dun-Qiu Wang
To observe the effect of aeration strategies on the dissipation of fluoroquinolones (FQs) during aerobic composting and explore their dissipation pathways, 60-L composting and 0.5-L incubation experiments were carried out in this study. Three aeration strategies (windrow, static aeration, feedback aeration) were applied to remove two typical FQs (Norfloxacin (NOR) and Ofloxacin (OFL)) during the 60-L composting of sewage sludge with 5 mg kg −1 of FQs added. Then, three 0.5 L-sample groups were taken during the three phases of the 60-L composting matrixes without FQs under static aeration, and were inoculated separately at 35 °C, 55 °C and 40 °C after being added with 5 mg kg −1 of FQs. In each group, incubation was carried out for three treatments (sterilization + no aeration, sterilization + aeration, and no sterilization + aeration). The FQs in the sewage sludge were mainly removed in the mesophilic and thermophilic phases in all the aeration strategies. The removal efficiencies were high for the whole process: 89.6–95.4% for NOR and 87.2–95.4% for OFL. The order of removal efficiency of FQs was static aeration > feedback aeration > windrow. The combination of composting phases facilitated to the rapid dissipation of FQs, which reduced the half-life to about 1/6 to 1/5 of the values in each phase. In the mesophilic and thermophilic compost, biodegradation was the main pathway for the dissipation of FQs followed by irreversible adsorption. Irreversible adsorption and biodegradation provided similar removal efficiencies for the curing compost. The volatilization of FQs was non-negligible in all phases.
研究领域:
环境科学
·
微生物学
✓ 已验证
DOI
PubMed
高影响因子
ENVIRONMENTAL POLLUTION
·
2020
·
IF 6.793
Jiajiang Lin,Chao Xue,Shen Guo,Gary Owens,Zuliang Chen
Worldwide graphene use is rapidly increasing in a variety of industrial applications to such an extent that efflux into the environment seems inevitable where the likely final reservoirs of graphene wastes is likely to be wastewater treatment plants are. Despite this an understanding of how graphene products impact the bioleaching of metals from sludge is still limited. In this study, the effect of reduced graphene oxide synthesized from eucalyptus leaf extracts (EL-rGO) on Zn 2+ and Cu 2+ bioleaching from sludge was investigated. The major new findings were that EL-rGO had a negative effect on Acidithiobacillus ferrooxidans (A. ferrooxidans) growth; since optical density decreased by 0.059 as EL-rGO dose increased from 1 to 50 mg/L, and the bioleaching of Cu 2+ and Zn 2+ decreased by 27.7 and 20.2%, respectively. While at a EL-rGO dose of 1 mg/L A. ferrooxidans grew better, scanning electron microscopy (SEM) confirmed that exposure to EL-rGO caused cell membrane disruption at 50 mg/L. Cytotoxicity tests showed that this was related to an increase in lactate dehydrogenase (LDH) release rate and a decrease in superoxide dismutase (SOD) activity. These new findings provide evidence that green synthesized rGO is toxic to microorganisms and that toxicity increased with rGO dose.
研究领域:
环境科学
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微生物学
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DOI
高影响因子
ENERGY
·
2017
·
IF 4.52
Zhe Zhang,Congmin Liu,Wei Liu,Xu Du,Yong Cui,Jian Gong,Hua Guo,Yulin Deng
The traditional treatment of sludge methods are high energy-consumption and expensive processes. Due to the increasing awareness considering risks for the global environment and human health, appropriate treatments of sewage sludge are urgently expected. A novel flow fuel cell technology was reported herein which could convert sewage sludge to electricity directly with high power output . In this flow fuel cell, chemically stable and completely regenerable polyoxometalates (POMs) were used as both catalysts and charge carriers. Thermal induced charge transfer from sludge organisms to POM was successfully used to power the flow fuel cell. The power density of the cell could achieve as high as 50 mW/cm 2 , which is 100 times higher than the output of microbial sludge fuel cell reported in literature. Catalyst recyclability was investigated and the POMs were demonstrated to be effective to degrade sludge and transfer electrons in the fuel cell system after four rounds.
研究领域:
环境科学
·
生物化学
·
能源技术
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Chao Liu,Ziqian Wang,Sheng Hua,Hao Jiao,Yiliang Chen,Dahu Ding
As an undesirable by-product of the wastewater treatment plants (WWTPs), sewage sludge (SS) caused considerable stress on the normal operation of WWTPs, because of its expensive disposal costs. On the other hand, exploiting resource utilization of the residual SS seems to be an attractive approach to resolve this problem. In this study, SS was thermally converted into biochar catalysts (SBC) under oxygen-limiting conditions. By using peroxymonosulfate (PMS) as the chemical oxidant, norfloxacin (NOR) could be effectively removed and the reaction was significantly accelerated after the addition of SBC. Specifically, over 90% of NOR was eliminated by the SBC 800 /PMS process within 70 min. As evidenced by the comprehensive mechanistic investigations, 1 O 2 as well as electron-transfer regime primarily participated in the NOR degradation process, while radical species played minor roles. More importantly, the endogenous iron substances endowed SBC with magnetic properties, making the efficient separation of SBC from water available. Eventually, the possible intermediates were tentatively identified by liquid chromatography-mass spectrometry and the corresponding degradation pathways were proposed. Overall, this research developed a novel method to achieve the remediation of NOR-contaminated water and elimination of the potential risks of SS simultaneously.
研究领域:
环境科学
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水处理工程
·
材料科学
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产品关联
DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2020
·Vol. 83
·期 3
·739-750
·
IF 1.638
Fan Xiulei,Qian Zheng,Liu Jiaqiang,Geng Nan,Hou Jun,Li Dandan
Application of sewage sludge biochar as an adsorbent for antibiotics treatment has obtained special attention owning to its low cost and surface functionality. Three metal ions were selected to modify sewage sludge biochar through the pyrolysis with the metal loaded method. Fe loaded sewage sludge biochar (BC-Fe), Al loaded sewage sludge biochar (BC-Al) and Mn loaded sewage sludge biochar (BC-Mn) were characterized and used to explore the performance of adsorbing tetracycline (TC), sulfamethoxazole (SMZ) and amoxicillin (AMC). BC-Fe, BC-Al and BC-Mn possessed rougher surfaces, larger specific surface area and better pore structure. Intra-particle diffusion and Langmuir models were more suitable to describe the adsorption process. The maximum adsorption amount of TC, SMZ and AMC could reach 123.35, 99.01 and 109.89 mg/g by BC-Fe. Furthermore, the main mechanism of antibiotics adsorption by metal loaded sewage sludge biochars might be pores filling, Van der Waals forces and H-bonding. The study can not only solve the problems associated with the pollution of antibiotics from wastewater, but also reduced the treatment pressure of sewage sludge effectively. Modification enhanced the microcellular structure and promoted the degree of carbonization. Compared with biochar, metal loaded sewage sludge biochar exhibited better adsorption capacity. Fe ion was demonstrated to be the optimal modified material. Metal loaded sewage sludge biochars avoided the risk of polluting the environment.
研究领域:
环境科学
·
水处理
·
吸附技术
·
废弃物管理
·
生物炭改性
·
污染控制
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DOI
高影响因子
ACS ES&T Engineering
·
2026
·
IF 6.3
Fengbo Yu,Zijie Liu,Jiewen Luo,Chao Liu,Linxia Tang,Shaohong Zhou,Yuan Yuan,Mingshu Li,Jian Ji,Honggen Peng
Abstract Sewage sludge from wastewater treatment plants is increasing significantly, and its sustainable and green recycling remains a challenge. Herein, we develop a rapid Joule heating method for seconds upcycling sewage sludge into a reductive Fe/carbon composite. Reductive Fe produced by carbothermic reduction reactions effectively activated peroxydisulfate for producing SO4•– and •OH. Meanwhile, ultrahigh temperatures and electrostripping effects contributed to the formation of a graphene-like structure, which can strengthen organic pollutant adsorption and electron transfer during persulfate-based advanced oxidation processes for organic pollutant removal. Sludge-derived material possesses excellent degradation efficiency toward organic pollutants over a wide pH range and in common environmental anions, indicating great adaptability for practical wastewater treatment. Importantly, we developed a continuous Joule heating system using a Programmable Logic Controller with robotic arms for scale-up production from practical sludge. The results showed that the sludge-derived material has a great organic pollutant removal efficiency for industrial pharmaceutical wastewater, showing great application potential through the “treating waste with waste” route. Obviously, instantaneous Joule heating has been regarded as a next-generation promising candidate for sustainable and green recycling of sewage sludge and water purification.
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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2020
·Vol. 27
·期 18
·22806-22817
·
IF 3.056
Li Jie,Yu Guangwei,Pan Lanjia,Li Chunxing,You Futian,Wang Yin
Antibiotics residues in aqueous environment and sewage sludge accumulation have become serious environmental issues. The aim of this study is to investigate the potential of ciprofloxacin (CIP) removal by sludge-based biochar prepared from co-pyrolysis of sewage sludge and bamboo waste (BW). The stability and environmental risk of heavy metals (HMs) in the biochar were further investigated to evaluate potential risks for biochar utilization. Results showed that BW was an outstanding additive to prepare co-pyrolyzed biochar from sludge. A higher CIP removal rate (95%) of BW-sludge biochar (SBC) was obtained under initial CIP concentration of 10 mg/L, and its maximum adsorption capacity was 62.48 mg/g which was calculated from the Langmuir model. The pseudo-second-order and Freundlich model also well fit the CIP adsorption process, indicating a chemical and multilayer adsorption of CIP on a heterogeneous surface of biochar. Adsorption mechanism analysis indicated that the diverse functional groups and Fe species in biochar probably were the dominant factors in the adsorption of CIP. The π-π interaction, H–bond, ion exchange, and Fe-complexation might be the main interactions between the functional species and CIP molecules. Besides, HMs, especially the Cr, Cd, and As, were well immobilized in SBC compared with pure sludge biochar. This work suggested that sludge-based biochar, especially the co-pyrolyzed SBC, could be a potential adsorbent for CIP removal from aqueous solutions.
研究领域:
环境科学
·
废水处理
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产品关联
DOI
PubMed
高影响因子
WATER RESEARCH
·
2019
·
IF 7.913
Xiaowei Li,Lubei Chen,Yanyan Ji,Man Li,Bin Dong,Guangren Qian,John Zhou,Xiaohu Dai
Sewage sludge is a primary pathway for microplastics (MPs) entering into terrestrial ecosystems . However, a standardized method to analyze MP in sludge is lacking due to its high organic matter. This study investigated the extraction efficiency of six MPs in five solid matrices, i.e. sewage sludge, cattle manure, soil, sediment and silicon dioxide. Results show lower extraction efficiency of 87.2% for MPs in sludge compared with that in other matrices, especially polyethylene terephthalate (PET) (only 27.8%). The possible reason was that the presence of extracellular polymeric substances within the sludge hinders the MPs to float. Therefore, five protocols, i.e. hydrogen peroxide (H 2 O 2 ), Fenton , nitric acid (HNO 3 ), hydrochloric acid (HCl) and sodium hydroxide (NaOH) were used to pretreat the sludge and optimize the MP extraction. The sludge pretreated by H 2 O 2 , Fenton and 1 M of acids had higher MP extraction efficiency than the raw sludge due to higher extraction of the PET. The MP extraction efficiency in the sludge first increased, and subsequently decreased with the soluble chemical oxygen demand (SCOD) content, implying that moderate dissolution of sludge organic matter is beneficial to the MP extraction. Quantitative analysis of the changes in the MP physicochemical characteristics after the pretreatments indicated that polyamide (PA) and PET are not resistant to acid and alkali treatment, respectively. Principal component analysis shows that the effect of pretreatments on the MPs follows a decreasing sequence: alkali > high concentration of acids > low concentration of acids > H 2 O 2 and Fenton. Additionally, the susceptibility of the MPs to the pretreatments follows a decreasing sequence: PET, PA and polymethyl methacrylate (PMMA) > polystyrene (PS) > polyethylene (PE) and polypropylene (PP). The findings supply novel insights into the effect of chemical pretreatments on MP extraction in sewage sludge.
研究领域:
环境科学
·
污染生态学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2015
·
IF 3.313
Ying Su,Wei Zhu,Miao Gong,Haiyun Zhou,Yujie Fan,Basil Amuzu-Sefordzi
The interaction between lignin and proteins was investigated to improve understanding of supercritical water gasification (SCWG) of sewage sludge from water treatment. Phenol and alanine were used as model compounds, and mixed in proportions from 0 to 100%. The mixtures were gasified at 400 °C and 22–26 MPa in a batch reactor with a residence time of 30 min. SCWG of the mixtures enhanced total gas, H 2 , and CO 2 yields compared with weighted average values. The maximum increase of H 2 yield was at 60 wt% alanine, and the H 2 yield was about twice the weighted average value. Co-gasification of the compounds in supercritical water facilitated the removal of total organic carbon and total nitrogen from the aqueous phase , and the generation of oil phase products, mainly phenol compounds and organic compounds containing nitrogen. The increase of gas and oil phase products may be caused by phenol promoting the decomposition of alanine, while alanine promotes the condensation of phenol.
研究领域:
环境科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
Sustainability
·
2022
·Vol. 14
·期 14
·8690
·
IF 3.889
Yuan Liu,Jie Jin,Jiawei Li,Ziwei Zou,Renchan Lei,Jintao Sun,Jinxia Xia
Sustainable phosphorus (P) recovery from sewage sludge is crucial to reconciling the simultaneous shortage and excess of P. In this study, magnetic biochar (MBC) was synthesized and innovatively applied to enhance P recovery as vivianite. The effects of anaerobic digestion (AD) time, hydrothermal (HT) pretreatment temperature and MBC dose on vivianite formation were investigated using batch experiments and a modified sequential P extraction protocol. The P fractionation results showed that the concentration of pure vivianite-bound P (Fe(II)-P) reached a maximum on the 10th day of AD treatment, and then declined sharply due to vivianite oxidation and P limitation. HT pretreatment operated at relatively high temperatures (135 and 185 °C) reduced vivianite formation; this negative effect of HT pretreatment was partially compensated by MBC supplementation. The proportion of Fe(II)-P in the solid phase of sludge was substantially raised up to 57.1% from 8.3~17.4% with an increasing dose of MBC from 0 to 12.5 g/L, indicating that MBC had a markedly enhanced effect on vivianite formation; this could be attributed to the MBC-improved Fe(II) production, as evidenced by the elevated proportion of Fe(II) in Fe2p XPS spectra and the increased ratio of Fe(II)-P to oxidized vivianite-bound P (Fe(III)-P) in the sludge after MBC supplementation. MBC addition also decreased the proportion of water-extractable P by sorption and promoted organic P decomposition, which further facilitated vivianite production. These findings reveal a new strategy for enhancing P recovery from HT-pretreated AD sludge.Keywords:vivianite;sewage sludge;P recovery;biochar;HT-AD
研究领域:
环境科学
·
废物管理
·
资源回收
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）