Journal of Environmental Sciences
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2025
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IF 6.3
Chao Zhu,Yiruo Huang,Ze Ding,Zarak Mahmood,Xingang Kong,Hongrui Ma,Xianbao Wang
Coking wastewater, characterized by high biological toxicity, poses significant challenges for traditional biological treatment methods. This study developed a novel in-situ immobilized photocatalytic-algae-bacteria consortia (P-ABC) system using a polyether polyurethane sponge as a carrier, aiming to enhance biological treatment efficiency for actual coking wastewater. Results showed a 16.8 % increase in algal density (up to 1.51 × 10⁵ cells/mL) in the P-ABC system compared to non-coupled controls, with significantly improved microbial metabolic activity, confirming the carrier's exceptional biocompatibility. Compared to standalone algae-bacteria consortia systems, the P-ABC system achieved higher removal efficiencies for chemical oxygen demand (COD Cr , 19.8 %), total organic carbon (TOC, 21.2 %), and total nitrogen (TN, 30.4 %). These findings validate the system's potential for improving stable and efficient treatment of industrial wastewater. Furthermore, this study offers insights into bio-enhanced treatment technologies and provides a reference pathway for integrating advanced oxidation and biological processes.
研究领域:
环境工程
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废水处理
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生物技术
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光催化
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产品关联
DOI
PubMed
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2021
·
IF 3.927
Yifan Liu,Yan Luo,Mingliang Li,Lixia Yang
A novel Bi 2 MoO 6 (BMO) modified g-C 3 N 4 heterostructure composite photocatalyst (g-C 3 N 4 /BMO) was prepared by hydrothermal method . The orthorhombic crystal phase of the material was studied by the X-ray diffraction assay (XRD). The microscopic morphology of the material was investigated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), indicating a heterojunction structure of the composite. The electrons and holes separation was evaluated by photo-luminescence (PL) and photocurrent measurements. The removal rate of O-Nitrophenol was as high as 97.3% over the catalyst with the optimal ratio of 1: 0.09 (BMO:g-C 3 N 4 ) in 180 min. COD removal percentage of actual pharmaceutical wastewater was as high as 71.40%. The active species in the photocatalytic system were studied, indicating superoxide radicals ( · O 2 - ) and holes (h + ) as the main active species.
研究领域:
材料科学
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环境科学
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化学
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产品关联
DOI
高影响因子
Materials
·
2025
·Vol. 18
·期 17
·4163
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IF 3.2
Fei Gao,Peng Xu,Yongqing Zhang,Hui Zhang
To address scaling issues in oilfield water injection, a degradable terpolymer scale inhibitor MA-AA-AMPS (terpolymer)was synthesized via aqueous solution polymerization using maleic anhydride, acrylic acid, and 2-acrylamido-2-methylpropanesulfonic acid as monomers. Characterization confirmed the presence of carboxyl, sulfonic, and amide groups in the copolymer with good thermal stability. Scale inhibition tests showed that at 2% dosage, its scale inhibition efficiency exceeded 80%, remaining above 80% in the pH range of 3–8 and over 50% at 150 °C, with excellent tolerance to high-calcium environments. Biodegradation tests revealed BOD5/COD > 0.3, with a biodegradation rate exceeding 50% in 15 days and reaching 83.4% in 30 days, indicating environmental friendliness. This scale inhibitor effectively solves scaling problems in oilfield water injection systems.
研究领域:
石油工程
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高分子化学
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环境科学
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阻垢技术
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材料科学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2015
·Vol. 6
·期 2
·987-994
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IF 3.84
Zhijun Li,Qi Yang,Yu Zhong,Xiaoming Li,Li Zhou,Xin Li,Guangming Zeng
In this study, Fe(II)-loaded granular activated carbon (GAC) was used as a heterogeneous persulfate catalyst for the pretreatment of mature landfill leachate. The effects of Fe2+ dosage, persulfate concentration and initial pH on the degradation of the organic pollutants in the landfill leachate were investigated. In single factor experiments, the maximum Chemical Oxygen Demand (COD) removal rate reached 66.8, 66.2 and 76.3% at an Fe2+ dosage of 127 mg L−1 (Fe2+/S2O82− = 254 mg mol−1), a persulfate concentration of 0.5 mol L−1 (i.e. S2O82− : 12COD0 = 1.08) and an initial pH of 3, respectively. Obviously, pH played a more important role in the persulfate oxidation treatment than the other two factors. The synthetic experimental results showed that the COD removal rate exceeded 87.8% when the reaction conditions had a controlled Fe2+ dosage of 127 mg L−1, persulfate concentration of 0.5 mol L−1 and initial pH of 3.0, simultaneously. The recycle experiments displayed that the catalytic ability of reused Fe(II)-GAC declined considerably and the COD removal rate dropped by approximately half after reusing three times. But the catalytic ability of the catalyst used could be well recovered after regeneration at 550 °C in a N2 atmosphere. Finally, fluorescence excitation–emission matrix (EEM) spectroscopy preliminarily explained the degradation mechanism of the landfill leachate.
研究领域:
环境工程
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废物管理
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水处理
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DOI
高影响因子
AQUACULTURE
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2023
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IF 4.5
Tingting Ye,Min Li,Yuanbin Lin,Zengjian Su
Aquaculture has expanded significantly in recent years, and the effluent it produces has had a significant negative impact on the environment. The survival and growth rates of aquaculture products may impact by the eutrophication of the water body if the effluent from aquaculture is not handled. In this study, chitosan-based aerogel was used as a carrier to immobilize the degrading bacteria, and the adsorption capacity of the carrier material for methyl blue was 1.30 mg·g −1 . The Caulerpa lentillifera was added to the shrimp tank at the same time as a biofilter , and a composite in-situ treatment system using microbes and macroalgae was built to handle the effluent from the mariculture industry to test the reduction rates of the nutrients from the wastewater. The outcomes demonstrated that the immobilized bacteria used had reduction rates of COD , NH 4 + and NO 2 − in wastewater that were 48.82%, 9.14% and 40.74% greater than those of the free bacteria, respectively. The reduction effect of macroalgae for nutrients in wastewater is also very ideal, in which the reduction rates of TP and TN reach 32.43% and 74.94% respectively. When the immobilized degrading bacteria and macroalgae are combined, the reduction rates of COD, TN and TP in water reach 68.61%, 59.03% and 34.25%. At the same time, the survival rate of shrimp and the biomass of macroalgae have increased to a positive extent, with increases of 12.5% and 140%, respectively. These results demonstrate that the introduction of immobilized degrading bacteria and macroalgae into the shrimp culture system can effectively reduce the accumulation of nutrients in the shrimp culture system and have a positive impact in a variety of ways.
研究领域:
环境科学
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水产养殖
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废水处理
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生物技术
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产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
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2021
·
IF 9.642
Xia He,Zhenyu Guo,Jian Lu,Ping Zhang
Little is known about the effect of carbon-based conductive material (CM) addition on the anaerobic co-digestion of fat, oil and grease (FOG) and waste activated sludge (WAS). In this study, three types of carbon-based CMs (nano-graphite (NG), granular activated carbon (GAC), and carbon cloth (CC)) and nine dosages were evaluated for their influences on co-digestion performance. The best dosage was achieved at 0.2 g/L NG, 10 g/L GAC, and 1 cm × 5 cm CC with 13–22% incremental methane production, 25–55% increased VS removal and 28–32% enhanced COD conversion efficiency compared to the control. The highest total amount of bacteria/archaea was found in CC (1 cm × 5 cm), followed by GAC at 10 g/L and NG at 0.2 g/L, which were all higher than those of the control. Microbial community analysis revealed that direct interspecies electron transfer (DIET)-mediated syntrophic acetate oxidation (SAO) enabling faster acetate conversion might be responsible for the enhancement of methane production.
研究领域:
环境工程
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生物技术
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微生物学
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DOI
PubMed
高影响因子
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
·
2018
·Vol. 187
·期 4
·1488-1501
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IF 1.797
Sun Zhong-liang,Sun Li-qin,Chen Guo-zhong
This work investigated the cultivation of Chlorella vulgaris in a thin-film flat plate photobioreactor under outdoor conditions and using digested piggery wastewater as the culture medium. The algal cells were able to adapt quickly to the wastewater and outdoor conditions. A specific growth rate of 0.12 day −1 was obtained in the exponential growth phase, which was slightly higher than that during indoor cultivation using artificial culture medium. Results showed that Chlorella vulgaris effectively removed TN, TP, and COD by 72.48%, 86.93%, and 85.94%. Due to the difference in culture conditions and phosphorus availability, the biomass from outdoor cultivation contained higher lipid content and more unsaturated fatty acids compared to indoor cultures, while the amino acid composition was unaffected. Results of metallic element assay indicated that the biomass cultured with wastewater conformed to the standards required for animal feed additive production. The overall cost of the biomass production in the thin-film flat plate photobioreactor (32.94 US$/kg) was estimated to be 4.67 times lower than that of indoor cultivation (154.04 US$/kg). Together, these results provide a basis for large-scale outdoor production of microalgae and wastewater bioremediation.
研究领域:
环境工程
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生物技术
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废水处理
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藻类生物技术
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
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IF 13.3
Mengxin Li,Shiyuan Fu,Yutong Han,Jingjing Zheng,Changzhi Wang,Xiangyang Xu,Liang Zhu
Aiming at the issues of high consumption of reagents and energy, and poor removal ability of carbon and phosphorus in the existing process of sewage treatment plants, a novel type of carbon & phosphorus co-trapping magnetic coagulant named as acid-modified magnetically doped biochar (A/M-BC) was prepared for sewage treatment. Results showed that the removal efficiencies of chemical oxygen demand (COD) and total phosphorus (TP) were as high as 64.4 % (±2%) and 93.7 % (±8%), respectively. A series of characterization findings indicated that the A/M-BC had a nanoscale porous structure, a surface laden with magnetic particles, and a diverse array of iron oxides, enabling the formation of phosphate complex groups and exhibiting excellent paramagnetism. The efficient co-trapping of carbon and phosphorus by A/M-BC was mediated via combined coagulation and adsorption. Where into, coagulation includes co-precipitation and bridge of phosphate-iron complexes induced by complex ferric salts and net sweep trapping with magnetic powder. The novel magnetic coagulant A/M-BC had the advantages of a better co-trapping and faster separating for carbon and phosphorus, which has great application potential in reducing carbon emissions in the sewage treatment process.
研究领域:
环境工程
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水处理
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材料科学
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可持续性
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产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
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IF 1.5
Jun Chen,Boding Zhang,Bingxing Wang,Chengxing Cui,Songlin Wang,Jichao Wang,Wenlong Zhang
With high toxicity, carcinogenicity and teratogenicity, quinoline has been threatening human health and ecological environment. Herein, Fe-Co-Ni-P/g-C 3 N 4 particles are developed as electrochemical reactors to form a three-dimensional catalytic particle electrode system (3D-CPE) for efficient removal of quinoline from wastewater by electro-Fenton (EF) oxidation process. with reaction time of 30 min, the particles dosage of 50 g/L, pH of 3, conductivity of 11.5 ms/cm, and current density of 37.04 mA/cm 2 , the chemical oxygen demand (COD) removal rate can up to 90.95%. In addition, electron paramagnetic response (EPR) and radical scavenging tests are performed to determine the hydroxyl radicals of electrochemical processes produced. The degradation products are analyzed by high performance liquid chromatography-mass spectrometry (HPLC-MS). Finally, through theoretical calculation and analysis of degradation products, a reasonable degradation mechanism is proposed.
研究领域:
环境科学
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化学工程
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水处理
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电化学
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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）