Desalination and Water Treatment
·
2015
·
IF 1.173
Ziyun Bao
In southern China, the increasing nutrient loading coupled with year-round warm weather in water sources promotes the growth of cyanobacteria, which can produce cyanotoxins, especially the potent liver toxins called microcystins (MCs). In order to purify raw water in a cost-efficient and environmentally friendly way, an ecological floating bed (EFB) experiment had been conducted to verify the viability. The removal efficiencies of total microcystin-LR (TMC-LR) averaged 42.4, 48.5, 43.0, and 36.3% at flow rates of 0.5, 2.0, 4.0, and 10.0 cm/s, respectively. Different flow rates had no significant effect on microcystin-LR (MC-LR) absorption by plant, and the uptake in Oenanthe javanica was root over leafage. The protozoa and metazoan were different in amounts observed in the rhizosphere from EFB at different flow rates. Investigations of the potential for biodegradation of MC-LR had been carried out through well-controlled microcosm using EFB sediment as inocula. MC-LR could be degraded aerobically from 2 mg/L to below the detection limit at 25°C in 5 d with a lag phase of 2 d by EFB sediment at flow rate of 2.0 cm/s. Taking the hydraulic and treatment efficiencies into consideration, the flow rate of 2.0 cm/s was recommended for site selection. And these findings suggested that the flow rate affected the zooplankton grazing and bacteria degradation more than plant absorption of MCs. In addition, it was observed that TMC-LR removal efficiency showed positive linear correlation with the removal efficiencies of total phosphorus, chemical oxygen demand, and chlorophyll-a, respectively.
研究领域:
环境科学
·
水处理工程
·
生态学
✓ 已验证
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2020
·
IF 6.551
Wenting Lin,Zhishan Huang,Shiyu Gao,Zhifeng Luo,Wenxuan An,Ping Li,Senwen Ping,Yuan Ren
Wastewater-based epidemiology (WBE) is considered as an effective tool for monitoring drug consumption, which is often obtained by back-calculation using the influent concentration and other parameters of wastewater treatment plants . Lack of information on the transformation of drugs in municipal wastewater and sewers may lead to inaccurate consumption estimation. Fourteen prescription drugs in four major categories of diseases (cardiovascular, diabetes, depression, and asthma) were selected to study their adsorption and biodegradation in wastewater and biofilm sewers under different temperatures, pH and biofilms conditions. The result demonstrated that the decay percentage of drugs in wastewater is increased with temperature. Within 72 h, eleven of these 14 drugs, such as metformin, metoprolol, bezafibrate, etc., have decay percentages below 20% in wastewater, which are considered as stable drugs; and the decay percentages of the other three, monluster, paroxetine, and sertraline, are greater than 20%, which are the most unstable drugs. In lab-scale aerobic and anaerobic sewers, the decay percentages of metformin, glipizide, metoprolol, gemfibrozil, and atorvastatin are less than 20% within 24 h. The decay percentages of venlafaxine, citalopram, fluoxetine, salmeterol, and salbutamol within 24 h are 20%–60% and paroxetine and sertraline are close to or even exceed 80% within 6 h. Biodegradation of drugs in sewers with aerobic or anaerobic biofilms is higher than that in wastewater systems without biofilms. The results showed that when the per capita consumption of drugs is estimated by using the WBE method, the stability of drugs in wastewater and different types of sewers will significantly affect their residual concentrations.
研究领域:
环境科学
·
药理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Zhigao Zhu,Wei Wang,Qianyun Zhang,Xuemei Chen
The primary problem with membrane distillation (MD) for concentrating hypersaline wastewaters is its severe membrane scaling induced by increasing salt concentration of wastewater. Herein, we developed a superhydrophobic and welded-pore polyimide fibrous membranes (SH-welded PI FM) combined with optimizing feed/permeate flow velocity to alleviate membrane scaling and improve membrane water flux simultaneously. The experiments reveal that the SH-welded PI FM functionalized with welding pores avoids membrane pore deformation induced by increasing flow velocity and superhydrophobicity reduces the overall adhesive interaction between crystal and membrane surface to against membrane scaling. Comparative experiments and simulation results reveal that increasing flow velocity is also beneficial for vapor transmission by partially overcoming membrane temperature and concentration polarization and alleviating membrane scaling by producing asymmetrical disturbation on membrane two surfaces. However, the progressive increase will aggravate membrane scaling because of the excessive disturbance of flow velocity to fibers enlarging membrane pores. Therefore, designing welded-pore and superhydrophobic fibrous membrane combined with optimizing flow velocity is extraordinarily effective in simultaneously improving membrane water flux and mitigating membrane scaling for concentrating hypersaline wastewaters. These findings are significant to break the trade-off of membrane water flux and scaling for MD to concentrate hypersaline wastewaters for practical application in industries.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2019
·Vol. 26
·期 23
·23593-23602
·
IF 2.914
Zhang Xiaohan,Huang Riheng,Li Ping,Ren Yuan,Gao Jianfa,Mueller Jochen F.,Thai Phong K
Wastewater-based epidemiology (WBE) has been widely used as a complementary method for estimating consumption of illicit drugs in the population. Temporal drug consumption estimates derived from WBE can provide important information for law enforcement and public health authorities in understanding changes in supply and demand of illicit drugs, but currently lacking in China. In this study, influent wastewater samples from a municipal sewage treatment plant in Guangzhou, China were collected for 8 weeks to investigate the temporal change in consumption of six illicit drugs in the catchment. The results indicated that methamphetamine and ketamine were the dominant illicit drugs in Guangzhou with the per capita use of 14.7–470.7 mg/day/1000 people and 64.9–673.7 mg/day/1000 people, respectively. No distinct weekly patterns were observed for illicit drug consumption in Guangzhou, indicating that drug users are likely to be regular ones. Further assessment about the impact of public holidays on the consumption behavior of drugs showed little impact for ketamine ( p = 0.689), but higher consumptions of methamphetamine ( p = 0.003) and cocaine ( p = 0.027) were observed during public holidays than the control period. The considerable decrease in drug consumption observed in October 2017 compared with January and May 2017 was possibly the consequence of law enforcement action.
研究领域:
公共卫生
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS ES&T Engineering
·
2021
·
IF 0
Shenyu Lan,Chuan Yu,Enya Wu,Mingshan Zhu,Dionysios D. Dionysiou
Ambient water motions presented in urban drainage systems is a rich source of renewable mechanical energy. Harvesting this energy to trigger the generation of reactive oxygen species (ROS) for water purification is a desirable yet underexplored solution. Herein, the water flow from a spiral reactor to simulate pipeline drainage was utilized to provide mechanical energy to power itself to initiate the piezo-response of molybdenum disulfide (MoS2) that was added into water flowing in the reactor. The piezocatalytic degradation efficiency of benzothiazole by MoS2 reached 94.8% after 24 cycles (ca. 144 s), which was 8.8 and 4.9 times higher than that of quiescent solution of MoS2 and non-piezoelectric commercial MoS2, respectively. Furthermore, the water flow-driven system can be extended to degrade different kinds of organic contaminants, including benzotriazole and various antibiotics (enrofloxacin, ciprofloxacin, metronidazole, etc.). All target pollutants were degraded with electric energy per order EEO in the range of 0.0161 to 0.0616 kW h/m3. In this process, the running water from the spiral reactor drove MoS2 to generate piezoelectric charges, which in turn reacted with dissolved oxygen and water to generate ROS including the hydroxyl radical, superoxide anion, and singlet oxygen to decompose the target pollutants. The system retained piezo-degradation efficiencies (>80%) in different aqueous matrices including rainwater, saline water, and pharmaceutical sewage and could be reused four times maintaining a good performance (>90%). This investigation provides a facile self-powered piezocatalytic process by harnessing ambient energy from the water flow of simulated water drainage to purify wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
WATER RESEARCH
·
2025
·
IF 12.4
Xinhui Xia,Huizhi Mu,Yujia Du,Shuocheng Shao,Yaqun Li,Dan Li,Qingliang Zhao,Liangliang Wei
Understanding the in-sewer stability of chemical biomarkers is crucial for effective wastewater-based epidemiology (WBE) studying. Sewer conditions, including environmental and biological factors, significantly influence biomarker transformations. This study investigated the stability of chloroxylenol (PCMX) under different levels of pH, temperature, shear force, and ventilation status, and then clarified the fate and behavior of PCMX in gravity sewers (GS). Results indicated the stability of PCMX obviously increased with higher pH and shear force, and lower temperature in both well- and partially-ventilated GS reactors. In poorly-ventilated GS reactors, the highest degradation rates occurred under normal conditions (pH = 7.0, T = 20 °C, shear = 1.15 N/m 2 ). Biological activity (MPR>SPR) and dissolved oxygen (DO) primarily drove PCMX transformation, with minimal effects from pH, temperature, and shear force. A positive correlation existed between PCMX transformation and DO, and a negative correlation existed between PCMX transformation and biological activity. Mass balance analysis indicated that adsorption and bioaccumulation dominated PCMX transformation in GS, while biotransformation occurred with the increasing of DO and prolongation of HRT. Additionally, the suitability of PCMX as a WBE biomarker under different GS conditions was assessed. PCMX was viable as a biomarker in partially-ventilated GS under pH 8 or shears force of 0.48 N/m 2 conditions, and in poorly-ventilated GS under pH 6 or shears force of 0.48 N/m 2 conditions. This study enhances understanding of factors affecting PCMX stability and supports its application as a WBE biomarker in community health assessments.
研究领域:
环境科学
·
公共卫生
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-12
·
IF 14.7
Zang Jinxin,Jiang Lufang,Wang Yingying,Chen Yue,Fu Chaowei,Kasprzyk-Hordern Barbara,Wang Na,Jiang Qingwu,Lambert Helen
Coronavirus Disease 2019 (COVID-19) emerged in December 2019, prompting the implementation of a “zero-COVID” policy in Mainland China. The easing of this policy in December 2022 led to a surge in COVID cases, which was believed to significantly increase antibiotic usage, potentially due to antibiotic misuse or increased coinfections. Our study aimed to compare antibiotic consumption and patterns before and after this policy adjustment. We utilised wastewater-based epidemiology (WBE) to analyse antibiotic levels in samples collected from five wastewater treatment plants in Eastern China during January and February of 2021 and 2023. 27 antibiotics were quantified using ultra-high performance liquid chromatography coupled with triple quadrupole tandem mass spectrometry (UPLC-MS/MS) and analysed via WBE, with the resulting estimates compared with catchment-specific prescription data. 23 antibiotics were detected in wastewater samples, with a substantial increase in usage in 2023 (ranging from 531% to 3734%), consistent with prescription data. Here, we show a significant rise in antibiotic consumption during the COVID-19 surge and this underscores the need for further investigation into the impacts of inappropriate antibiotic use in China.
研究领域:
公共卫生
·
流行病学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
WATER RESEARCH
·
2022
·
IF 13.4
Xue-Ting Shao,Pei-Yao Zhang,Si-Yu Liu,Jian-Guo Lin,Dong-Qin Tan,De-Gao Wang
Sildenafil (SIL) is widely used to treat erectile dysfunction. Information on its consumption and the factors influencing its use is limited in China. In this study, we sampled composite influent wastewater samples from 33 Chinese cities and analyzed SIL using liquid chromatography-tandem mass spectrometry. SIL consumption was estimated using wastewater-based epidemiology (WBE) and ranged from 10.6 mg/d/1000 people to 132 mg/d/1000 people, with a mean of 53 mg/d/1000 people. Prescription sales (3570 kg) accounted for 13.3% of the estimated SIL use (26842 kg) in 2018, thereby implying that SIL illicit use was greater than prescription use in China. Some regional differences were observed in SIL use, which was significantly higher in North China than South China ( p < 0.05), thereby reflecting that the prevalence of SIL was affected by differences in lifestyle and socioeconomic factors. We found significant positive correlations between SIL use and consumption of allopurinol, hydrochlorothiazide, nicotine, and alcohol, thereby suggesting that the prevalence of SIL was associated with the prevalence of gout, hypertension, smoking, and drinking. Moreover, age structures, internet use, and marriage rates were positively correlated with SIL use, whereas the unemployment rate was negatively correlated with SIL use. Our study demonstrates that WBE is valuable for medical research to investigate licit and illicit drug use and to assess the underlying associations of different chemical uses.
研究领域:
公共卫生
·
药物分析
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
RESOURCES CONSERVATION AND RECYCLING
·
2020
·
IF 8.086
Zhe Huang,Mi Lin,Ruijun Qiu,Jie Zhu,Jujun Ruan,Rongliang Qiu
With the rapid growth of lithium ion batteries (LIBs) market, large Numbers of LIBs are nearing the end of their life cycle. At the same time, large number of magnetic energy metals (MEMs) demand is difficult to meet. It is an urgent demand to recover micro magnetic particles from spent LIBs . However, the aggregates formed by micro particles make it difficult to be separated by mechanical technologies. Existing mechanical separating technologies are limited by strict particle size of larger than 0.075 mm. Chemical technologies can recover micro metallic particles without considering particle size but take the risks of environmental pollution . We developed a technology of ultrasonic dispersion and waterflow-magnetic separation to recover micro magnetic particles from mixed micro particles aggregates. By analyzing the relationship between aggregation energy and size of aggregates, the key factors to destroy the aggregation of micro particles were determined. The optimal parameters of ultrasonic dispersion were obtained by experiments. Under the condition of 20 min ultrasonic time, 200 W ultrasonic power, the maximum recovery rate of cobalt particles was 99.63% ± 0.62% and the purity of cobalt particles was 93.15% ± 0.56%. Combining with the trajectory of particles in waterflow-magnetic separation, key parameters influencing recovery effect were determined. This study provided a new technology for the separation of micro MEMs particles and aggregates.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 30
·2203666
·
IF 19.924
Jingyu Chen,Yonghui Li,Yongzheng Zhang,Dongdong Ye,Chuxin Lei,Kai Wu,Qiang Fu
The electrokinetic effect allows harvesting renewable energy directly from moisture, sweat, and rainwater, which is one of the promising techniques for self-powered electronics. However, current fibrous hygroelectric nanogenerators still suffer from either an intermittent energy harvesting mode or a limited electricity supply. Herein, learning from the transpiration process in plants, a conductive and hydrophilic cellulose/carbon nanotubes fiber is reported, in which continuous and efficient water flow can be driven by the macromolecular chain channel and spontaneous evaporation. In combination with the electrokinetic mechanism, just a single self-powered fiber is found to produce a constant and tremendous open-circuit voltage of 160.4 mV and a considerable power density up to 0.4 mW cm −3 . This record-high output performance with the feature of continuity and durability is about one order of magnitude higher than that of most conventional fibrous hygroelectric nanogenerators. Eventually, 108 fibers in series or parallel are woven into flexible fabrics, yielding the maximum power supply of 1.2 V with only 10 min charging time, capable of powering an electronic calculator. This work fabricates a knittable and designable self-powering fiber with excellent aesthetics and comfort for practical application, offering a novel concept and an effective approach toward clean energy usage.
研究领域:
材料科学
·
能源技术
·
生物仿生学
✓ 已验证
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2021
·
IF 7.963
Hangbiao Jin,Dan Yang,Yunbin Hao,Jinyang Zhang,Pengfei Wu,Weiping Liu,Meirong Zhao
The abuse of psychoactive substances has been increasing dramatically over the last few years, which is becoming a concern for human health and social stability. How to accurately estimate psychoactive substances' total consumption in certain areas is the key to manage such substances. In order to control psychoactive substances, 8 psychoactive substances' consumption within 12 wastewater treatment plants (WWTPs) service areas in a certain city of Guangxi, China was investigated in 2019. Firstly, a solid-phase extraction-liquid chromatography-tandem mass spectrometry method was used to determine the influent concentrations. Morphine (MOR), 3, 4-methylenedioxymethamphetamine (MDMA), methamphetamine (METH), ketamine (KET), and norketamine (NK) were detected, with the concentrations ranging from less than method detection limit (NK, MDMA) to 170.91 (METH) ng/L. Then, the back-estimation of consumption was conducted according to the objective and near real-time wastewater-based epidemiology (WBE). The results demonstrate that KET, MOR, and METH are the most abused psychoactive substances, with the mean consumption of 682.42, 167.81, and 44.56 mg/day/1000 inh, respectively. The psychoactive substance residues of WWTPs influent were analyzed to estimate such substances' consumption in specific areas, so as to provide support for risk prevention and control.
研究领域:
环境科学
·
公共卫生
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jingxue Wang,Yanting Liang,Zichen Wang,Bingjie Huo,Chao Liu,Xiaxia Chen,Hongwei Xu,Dongmei Li,Zhaoyou Zhu,Yinglong Wang,Fanqing Meng
Using water flow energy in the environment for water treatment is a feasible solution to alleviate energy shortages and environmental pollution. This work prepared a Cu 2 O@MoS 2 /PVDF modified pipeline with superior piezoelectric properties for norfloxacin (NOR) degradation. The piezoelectric coefficient d 33 of Cu 2 O@MoS 2 /PVDF increased by 27.7 % compared with PVDF. The piezoelectric current response test demonstrated that Cu 2 O@MoS 2 /PVDF had a higher current response than PVDF. FTIR showed that the presence of Cu 2 O@MoS 2 significantly increased the piezoelectric β -phase content of PVDF. The Cu 2 O@MoS 2 /PVDF pipeline exhibited the best degradation efficiency of 99.3 % within 40 min when the flow rate reached 1.389 L min −1 . O 2 – and OH have been shown to play an important role in NOR degradation and the possible degradation mechanism and pathways of NOR were proposed. This work provides a promising method for the efficient and green treatment of organic pollutants in water by using water flow energy and has practical application significance.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）