FUEL
·
2024
·
IF 6.7
Chuandong Ma,Wenqi Zhang,Zhisen Li,Junxiang Wang,Qingbiao Wang,Lin Li,Xiaofang You
In this study, high-concentration inorganic salt wastewater containing microplastics (MPs) was used to prepare MPs-coal wastewater slurry (MPs-CWWS). The rheological behavior, stability, and solid content of the slurry were discussed, and the interfacial interaction mechanism between particles was analyzed. Experimental results show that the presence of inorganic salts in the system will cause an increase in viscosity. This is because cations neutralize the negative charges on particle, resulting in a reduction in the electrostatic repulsion between particles. In addition, a large amount of water is adsorbed due to “ionic bonding”, resulting in a reduction in free water content and therefore a decrease in the solid loading of the suspended system. The enhanced stability is attributed to the thickening of the hydrated film. MPs have strong hydrophobicity and are easy to adsorb dispersants due to non-polar effects, which increases the negative charge and steric hindrance effect on the surface. MPs promote the dispersion of particles in the slurry. The extended-DLVO theoretical calculation results show that electrostatic repulsion and steric hindrance effect are the main forces promoting particle dispersion. Electrostatic repulsion plays a key role in promoting particle dispersion. The extended-DLVO theoretical calculations verify that the main reason for the increase in viscosity caused by inorganic salts is the decrease in electrostatic interaction energy. The existence of MPs can reduce the negative effects caused by inorganic salts.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Yue Sun,Yuanyuan Wang,Zheng Peng,Yan Liu
Sulfanilic acid (SA) is an important organic compound with numerous applications in industrial production, while the organic wastewater with high salinity is inevitably generated. In this work, desalination strategy of hypersaline SA wastewater was proposed by using bipolar membrane electrodialysis (BMED), which can realize the separation of SA and NaCl in wastewater and the conversion of NaCl into HCl and NaOH simultaneously. The influences of current density, initial concentrations of acid, base, SA and salt were investigated. The results showed that current efficiency decreased and energy consumption increased with an increase in current density. Higher initial concentrations of acid and base were favor to reduce energy consumption but current efficiency was low. At the current density of 40 mA/cm 2 , the initial acid and base concentrations of 0.10 mol/L, the highest concentrations of HCl and NaOH with initial salt concentration in the simulated feed solution of 80 g/L NaCl was 1.17 mol/L and 1.18 mol/L, respectively. Moreover, the total process cost of BMED process was estimated at $1.68/kg HCl and $1.52/kg NaOH respectively under the optimal experimental conditions. These findings confirmed that BMED may be an alternative and cost-effective strategy for treating high salinity SA wastewater.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
Frontiers of Environmental Science & Engineering
·
2021
·Vol. 16
·期 6
·1-10
·
IF 4.357
Man Quanli,Zhang Peilian,Huang Weiqi,Zhu Qing,He Xiaoling,Wei Dongsheng
A novel salt-tolerant heterotrophic nitrification and aerobic denitrification (HN-AD) bacterium was isolated and identified as Halomonas venusta TJPU05 ( H. venusta TJPU05). The nitrogen removal performance of H. venusta TJPU05 in simulated water (SW) with sole or mixed nitrogen sources and in actual wastewater (AW) with high concentration of salt and nitrogen was investigated. The results showed that 86.12% of NH 4 + -N, 95.68% of NO 3 − -N, 100% of NO 2 − -N and 84.57% of total nitrogen (TN) could be removed from SW with sole nitrogen sources within 24 h at the utmost. H. venusta TJPU05 could maximally remove 84.06% of NH 4 + -N, 92.33% of NO 3 − -N, 92.9% of NO 2 − -N and 77.73% of TN from SW with mixed nitrogen source when the salinity was above 8%. The application of H. venusta TJPU05 in treating AW with high salt and high ammonia nitrogen led to removal efficiencies of 50.96%, 47.28% and 43.19% for NH 4 + -N, NO 3 − -N and TN respectively without any optimization. Furthermore, the activities of nitrogen removal-related enzymes of the strain were also investigated. The successful detection of high level activities of ammonia oxygenase (AMO), hydroxylamine oxidase (HAO), nitrate reductase (NAR) and nitrite reductase (NIR) enzymes under high salinity condition further proved the HN-AD and salt-tolerance capacity of H. venusta TJPU05. These results demonstrated that the H. venusta TJPU05 has great potential in treating high-salinity nitrogenous wastewater.
研究领域:
微生物学
·
环境科学
✓ 已验证
DOI
高影响因子
Bioresource Technology Reports
·
2021
·
IF 0
Mister Adeel,Yubo Xu,Long-Fei Ren,Jiahui Shao,Yiliang He
Extractive membrane bioreactor (EMBR) is a promising technology for phenol saline wastewater treatment . In this work, an electrospun polydimethylsiloxane/polymethyl methacrylate/multi-walled carbon nanotubes (PDMS/PMMA/MWCNTs) membrane was firstly used in EMBR. To address low phenol transmembrane mass transfer issue, effects of wastewater condition (1.3–5.5 L/h circulation rate , 1000–4000 mg/L phenol), biomass addition (without/with pre-acclimated activated sludge) and biofilm formation (50.5–120.7 μm) were investigated. Membrane characterizations confirmed that biofilms on membrane surface gradually developed under increasing phenol concentrations, with simultaneously increased thickness and extracellular polymeric substances (EPS) excretion. Results showed phenol transmembrane mass transfer rates with activated sludge and formed biofilm increased 21.6–31.7% compared to those without activated sludge. Finally, 100% removal of permeated phenol and 99.96% rejection of salt were achieved under wastewater circulation rate of 4.4 L/h with 1000–4000 mg/L phenol and 10 g/L sodium chloride. Relevant findings are of significance in promoting the EMBR application in organic-inorganic composite wastewater treatment.
研究领域:
环境工程
·
膜技术
·
废水处理
·
生物技术
✓ 已验证
DOI
WATER SCIENCE AND TECHNOLOGY
·
2021
·Vol. 83
·期 9
·2160-2168
·
IF 1.915
Feng Kaiqing,Zhang Jiandong,Gao Lili,Tian Qi
Alicyclic amines are widely used in several types of industries, and considerable attention has been devoted to possible environmental pollution by alicyclic amines in hypersaline industrial wastewater. In this study, a new hypersaline tolerant bacterial TYUT067 capable of growing in liquid basal salt medium with cyclohexylamine (CHAM) as the sole carbon source and energy source, was isolated from soil, and discovered with highly efficient CHAM degrading ability. The strain TYUT067 was identified as Paenarthrobacter sp. based on 16S rDNA gene sequence, and its degradation characteristic was examined. The results revealed that the isolated TYUT067 could grow well under pH range of 6.5–10.0, temperature from 20 °C to 30 °C. For degradation of 60 mM of cyclohexylamine, 100% degradation could be finished within 120 h. The TYUT067 could degrade 10 mM CHAM under hypersaline conditions (3–5% NaCl, w/v), revealed the hypersaline tolerance of TYUT067. Different type of amines was also tested with TYUT067, the degradations of >90% were achieved toward several alicyclic amines. The current results suggested that TYUT067 was a potential species could be efficiently used for the degradation of alicyclic amines and might be applicable to a hypersaline wastewater treatment system for the removal of alicyclic amines. A new cyclohexylamine degradation bacterial strain TYUT067 was isolated from soil environment. The isolated TYUT067 is an alkali-tolerant strain and mesophilic microorganisms. The isolated TYUT067 can degrade CHAM under hypersaline environment. The isolated TYUT067 can degrade various alicyclic amines.
研究领域:
环境微生物学
·
环境工程
·
生物降解
·
工业废水处理
·
污染生态学
✓ 已验证
DOI
高影响因子
DESALINATION
·
2025
·
IF 9.8
Youyuan Xu,Yakun Tang,Lang Liu,Yue Zhang,Xiang Bai,Biao Zhang,Zhiguo Jia
Due to lower evaporation enthalpy and controllable water management, the efficiency of 3D hydrogel-based evaporators has attracted significant attention in solar desalination. However, challenges such as the closed pore structure, the strong adhesive force between salt deposition and photothermal material, and the byproducts of high-saline wastewater have limited long-term application in high-saline brine. To address these limitations, a 3D zero liquid discharge evaporator has been innovatively constructed. It is composed of a high porosity 3D CNT/PDA@PVA sponge-like hydrogel in optimal ionic conditions (the Hofmeister effect) and pearl-patterned cotton towels. The assembled evaporator has achieved excellent water evaporation performance of 3.0 kg m −2 h −1 (1.08 kg m −2 h −1 , in the dark) through side area-assistance and environmental energy. The non-contact salt deposition design can avoid direct salt deposition on the surface of the photothermal material. Thus, due to diffusion-convection and Marangoni flow in highly porous material and pearl-patterned cotton towels, the formed zero liquid discharge evaporator has remained a stable water evaporation rate of 2.65 ± 0.1 kg m −2 h −1 and recovered salt (59.16 g m −2 h −1 ) in 10 wt% NaCl solution for over 100 h. Most importantly, replacing the cotton towel with a new one allows the assembled evaporator to continuously operate in a 20 wt% NaCl solution while protecting it from damage. Significantly, the collected water can be directly used for drinking and wheat cultivation. This work offers new insights for designing a 3D-zero liquid discharge evaporator that can operate long-term in high-salinity brine, thereby expanding its practical applications.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Dong Feng,Ao Xia,Yun Huang,Xianqing Zhu,Xun Zhu,Pau-Loke Show,Qiang Liao
Conventional anaerobic digestion (AD) may be inhibited by the accumulation of intermediate metabolites, thereby disrupting the stability of the AD process. The emerging electromethanogenesis system opens up a new opportunity to enhance the efficiency of biogas technology. In this study, the potential mechanism of the combined impact of applied external voltage and hydraulic retention time on continuous propionate digestion was investigated for the first time. The methane yield was increased up to 98.6 %, while the methane content was enhanced up to 48.0 % with an external voltage of 1.0 V, compared with the control. The cyclic voltammetry results suggested that the external voltage facilitated faster growth, stronger resistance to hydraulic shock, and higher electrochemical activity of electroactive biofilms with a thickness of approximately 10 μm. Further analysis via a three-dimensional excitation-emission matrix confirmed the external voltage-boosted EPS secretion comprised of protein-like substances, acting as the electron mediator between Smithella and Methanosaeta .
研究领域:
环境微生物学
·
生物能源技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Jingwen Pan,Baoyu Gao,Yue Gao,Pijun Duan,Kangying Guo,Muhammad Akram,Xing Xu,Qinyan Yue
Organic pollutants decomposition in high-salinity wastewater is still a challenge for environmental restoration due to the inhibitory effects results from the consumption of radicals by anions. Herein, we demonstrated a non-radical oxidation process via the peroxydisulfate (PDS) activation rather than photocatalysis by the Cu 2+ adsorbed adsorbent-based nitrogen doped biochar (Cu@NBC) for efficiently decontaminating polycarbonate plant wastewater (PCW). After the pyrolysis, the Cu 2+ in the waste biosorbent were reduced to Cu 2 O, and the N-doping improved the fixation of Cu and the formation of Cu 2 O. Through both dynamic fitting and characterization analysis, the critical role of Cu 2 O in PDS activation rather than photocatalysis was revealed for the first time. Different from always reported 1 O 2 dominated non-radical process, an electron-transfer mechanism involving surface metastable species was proved to play a key role in the Cu@NBC/PDS system. Benefit from the electron-transfer process, the Cu@NBC/PDS system equipped with high resistance to the anions in high-salinity wastewater. The results indicated that BPA as well as chemical oxygen demand (COD) could be effective removal within 90 min. We further deposited the activator on an ultrafiltration membrane and exhibited a rapid oxidation of BPA as the wastewater passed through the filter, and the composite membrane can effectively inactivate bacteria, which will provide a safety strategy for mitigation of membrane fouling.
研究领域:
环境科学
·
废水处理
✓ 已验证
DOI
高影响因子
CHINESE CHEMICAL LETTERS
·
2025
·
IF 8.9
Xiaoyong Shu,Shizong Wang,Jianlong Wang,Qi Zhou,Yong Liu,Yongxia Sun
High-salinity wastewater, especially reverse osmosis (RO) concentrate, is difficult to treat due to severe microbial inhibition and the presence of refractory organics. Herein, a salinity-tolerant bacterium ( Chryseobacterium sp.) was isolated and applied in combination with ionizing irradiation to develop an efficient coupled process for RO concentrate treatment. The strain metabolically degraded phenol, p-cresol, indole, and benzoic acid, and transcriptomic analysis revealed that salt tolerance was associated with the synthesis of specific salt-tolerant proteins and enzymes ( i.e. , branched-chain amino acid). Although elevated chloride and sulfate concentrations reduced the phenol removal rate, complete degradation was achieved. The coupled process achieved up to 78.3 % COD removal and completely inactivated Chryseobacterium sp. in the effluent, ensuring biosafety. This study provides a promising strategy integrating halotolerant biodegradation and advanced oxidation for efficient treatment of high-salinity wastewater.
研究领域:
环境微生物学
·
水处理工程
·
环境化学
·
分子生态学
·
污染控制
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Yingdong Chen,Rongze Sun,Wentao Yan,Mengyao Wu,Yong Zhou,CongJie Gao
In many important industries, such as the textile printing industry, a large amount of dye/salt wastewater is often discharged, which can destroy the ecological environment of the water body. Membrane technology has a great potential in the treatment of environmental problems caused by dye/salt wastewater. Polyvinyl alcohol (PVA) nanofiltration (NF) membrane has a bright future in dye/salt wastewater treatment , however, works on this are rare. Herein, antibacterial PVA NF membrane incorporated with Cu(OH) 2 nanowires for the dye/salt wastewater treatment is reported. The membrane was prepared via coating the solutions containing PVA, glutaraldehyde and Cu(OH) 2 nanowires on the polyethersulfone ultrafiltration membrane. Cu(OH) 2 nanowires has a diameter of 60 nm and was successfully introduced into the membrane. The introduction of nanowires improved the membrane hydrophilicity and roughness, which is conducive to the improvement of membrane flux. Membrane separation performance for one component solution and dye/salt solution were investigated. The introduction of Cu(OH) 2 increases the flux of the membrane obviously (the highest increase is 178.78% (from 21.49 to 38.42 L·m −2 ·h −1 ·bar −1 , for NaCl solution as the feed). Besides, the membrane doped with nanowires also possessed a high dye/salt selectivity . For one component solution, the dye removal rate was over 97.00% while the salt rejection was low (the lowest was 13.18% (NaCl)). For the dye/salt solution, the dye (Congo Red) rejection kept at a high level (98.91%) and the salt (NaCl) rejection was still low (13.71%), while the flux was also high (37.56 L·m −2 ·h −1 ·bar −1 ). The performance is superior to that of many membranes reported in previous works. Moreover, the Cu(OH) 2 nanowires endowed the membrane with an improved and high antibacterial property. The sterilization rate of Escherichia coli and Staphylococcus aureus reached more than 99.99%.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
DESALINATION
·
2022
·
IF 11.211
Yu-yu Yao,Ting Wang,Li-guang Wu,Hua-li Chen
To improve the flux, anti-fouling and dye separation performance of PES-based membranes, PES mixed-matrix membranes (MMMs) blended with ZIF-8@Ti 3 C 2 T x composites were fabricated via a facile one-pot microemulsion strategy. The introduction of hydrophilic components in the microemulsion into the PES matrix enhanced the pore structures and surface polarity of the resulting MMMs, causing them to exhibit high permeation and anti-fouling performance compared to both neat PES and MMMs with ZIF-8. The optimal membrane flux and anti-fouling performance were found to be 280 L·m −2 ·h −1 and 91 % (bovine serum albumin rejection), respectively, at 3 % microemulsion content. The well-distributed ZIF-8@Ti 3 C 2 T x composites in the MMMs interact with dye molecules, which strengthens the dye retention from high-salinity wastewater. Further, the pore size of the MMMs was positively correlated with the flux but negatively correlated with dye retention. In particular, the M-3 membrane exhibited high flux (140 L·m −2 ·h −1 ) and up to 98 % dye rejection in high-salinity wastewater, but its rejection of salt ions was <5 %. In addition, the dye rejection recovery rate of M-3 after each washing exceeded 93 % over 5 fouling/backwashing cycles. These results strongly suggest that MMMs incorporated with ZIF-8@Ti 3 C 2 T x composites have promising application prospects for removing trace dye pollutants from high-salinity wastewater.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
Membranes
·
2025
·Vol. 15
·期 9
·271
·
IF 3.6
Jie Xu,Jinxin Liu,Mei-Ling Liu,Guangze Nie,Dong Zou
Membrane distillation demonstrates ideal separation performance towards saline water; however, it fails to accomplish the classification and recovery of multiple components from complex saline solutions (i.e., heavy metal ion-laden saline water in process industries). Herein, an adsorption–membrane distillation (MD) coupling process was proposed, as an example of a Pb(II)/NaCl mixed solution, in which the prepared adsorption membrane was firstly employed to adsorb heavy metal ions in the mixed solution and then the brine was concentrated by the MD process to realize water source recovery and utilization. Firstly, an FeOOH@PVDF adsorptive membrane was fabricated to adsorb Pb(II) ions. It was demonstrated that chemical adsorption was identified as the dominant mechanism, and the composite membrane showed excellent selective adsorption for Pb(II). Following this, the omniphobic membrane was then employed to concentrate the Pb(II)-removed saline solution, maintaining a water flux of 16.12 kg·m−2·h−1at a concentration factor of 7.7, demonstrating excellent MD concentration performance. Through this coupled process, the saline wastewater containing heavy metal ions was successfully separated into purified water and concentrated brine without heavy metal ions, providing a novel approach for the treatment and recycling of complex saline wastewater.
研究领域:
环境工程
·
化学工程
·
材料科学
·
水处理技术
·
分离科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）