CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xiong Ke,Tuo Wei,Gengrui Wei,Acong Chen,Xiaoqian Cheng,Zemin Li,Zhi Qin,Zijun Pang,Jiamin Pan,Yao Chen,Cong Wei,Xianghong Guan,Xuguang He,Guanglei Qiu,Haizhen Wu,Chaohai Wei
The wastewater from coke making is characterized by high toxicity, high concentration of pollutants and complex composition. Therefore, it is difficult to treat using conventional methods such as advanced oxidation and ion exchange processes. In this study, a zero-discharge integrated process (ZDIP) composed of pre-physicochemical – oxic – hydrolytic & denitrification – oxic – post-physicochemical (A/O/H/O/A) biological, pre-processing, membrane and end-processing units was created to treat coking wastewater. The results showed that most of the chemical oxygen demand, sulfide, cyanide and NH 4 + -N in the coking wastewater were removed in A/O/H/O/A biochemical unit. Hardness, F − and turbidity were further eliminated in the pre-processing unit, while more than 98 % of the effluent was reused in the membrane unit. Finally, zero discharge treatment of residual liquid and sludge was realized in the end-processing unit. The operating cost was about 2.49 USD/m 3 and the carbon emissions 9.17 kg CO 2 -eq/m 3 of influent for the entire ZDIP. Theoretically, the ZDIP based on hierarchical cycle drive, which is applicable to handling complex wastewaters, cutting carbon emissions and recycling water, can be taken as an effective wastewater treatment process in the next decade.
研究领域:
环境工程
·
废水处理
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Jiawei Wang,Yajie Ding,Zhiyang Huang,Shenghua Zhou,Jianqiang Wang,Fu Liu
Concurrent oil and water recovery from emulsions has attracted significant attention for the zero-discharge treatment of oily wastewater. Coalescence demulsification mechanism offers promising recovery of both oil and water phases, ultimately realizing zero-discharge of oily wastewater. However, fouling caused by oil and other contaminants is still one of the toughest challenges for coalescence demulsification membranes. This work reports a heterogeneous wettable nanofibrous membrane with welded nanofibers, which enables durable oil-water separation and concurrent oil and water recovery. The welded heterogeneous wettable channels ensure robust separation and recovery stability through a feedback loop of capture-aggregation-release of oil phase. Under continuous flow-through separation, oil and water recovery reached up to 67.5% and 99.6%, respectively with purities close to 99.9%. This study provides new insights into oil-water recovery from emulsions via coalescence demulsification and advances the potential practical applications of this approach in the zero-discharge treatment of oily wastewater.
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
Journal of Cleaner Production
·
2024
·
IF 9.7
Xiong Ke,Huiling He,Zhi Qin,Tuo Wei,Acong Chen,Qing Wang,Guanglei Qiu,Chaohai Wei
Zero-discharge industrial wastewater treatment is an inevitable goal that enterprises seek for the green and sustainable development. However, the generation and treatment of mixed salt present an enormous challenge. This study, taking the practical case of coking wastewater treatment, analyzes the influencing factors of salt and proposes a load salt reduction strategy. The results show that chemical oxygen demand (COD) is the main factor for the change in salt content. When the influent COD of coking wastewater is 3863.93 ± 466.61 mg/L, the relationship between salt reduction (y) and the COD change rate (x) in the treatment process follows the ExpGro1 natural exponential function: y = −2.2378 × exp (-x/17.0839) + 2.2570, with a fitting degree of 0.9938. In the case where the economic and environmental benefits of this strategy are positive (with a maximum COD reduction of 0.5796 kg/m 3 ), every 1.0 kg/m 3 reduction in COD will result in a reduction of 2.5002 ± 0.2980 mS/cm·m 3 in salinity, 3.7391 ± 0.9245 CNY/m 3 in operating costs, and 1.4989 ± 0.6509 kg CO 2 /m 3 in carbon emissions. Moreover, this study proves that the adsorption - oxic/hydrolytic & heterotrophic denitrification/oxic (A-OHO) process can effectively reduce the load salt. Other salt reduction strategies (technology salt reduction and cycle salt reduction) and the concept of strategic cooperative operation are also further explored.
研究领域:
环境科学
·
污水处理
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DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2021
·
IF 4.311
Yong Suo,Yongsheng Ren
The influence of representative typical pollutants in the zero-discharge process of coal chemical high-salty wastewater on the fouling behavior of nanofiltration membranes was studied. In this study, a commercially available NF90 nanofiltration membrane was selected, with three inorganic salts, cyclohexanol (C 6 H 12 O) and APAM as the main target foulants. Various membrane samples were characterized by Contact angle, AFM and SEM-EDS, and the membrane fouling behavior was quantitatively evaluated by analyzing the influence of the interaction between different components in the feed solution on the membrane flux and interface thermodynamics. The results show that the deposition of fouling is closely related to the interface free energy (ΔG). The AB interfacial energy significantly affects membrane fouling. Membrane fouling is mainly dominated by residual APAM, followed by inorganic salts and cyclohexanol. The interaction between organic and inorganic fouling is the core factor that exacerbates membrane fouling. The interaction between APAM and inorganic salt ions mainly accelerates membrane fouling through charge shielding and complexation. Cyclohexanol accelerates membrane fouling mainly by reducing the solubility of inorganic salts and absorbing on the surface of the fouling layer. The competition and synergy between hydrophilic APAM and hydrophobic cyclohexanol are also the factors that aggravate membrane fouling.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xinfei Fan,Xiaoyu Liu,Xingzu Zhang,Yanbin Xin,Yuanlu Xu,Hongli Ge,Yanming Liu
Solar driven interfacial evaporation (SDIE) is an emerging technique to address the global freshwater crisis, but its application is beset by the co-exist organics in water. Herein, a novel SDIE integrated with heterogeneous electro-Fenton (he-EF) system was proposed to achieve a near zero-discharge of organics with simultaneously enhanced vaporization in a continuous siphon mode. The coupled he-EF not only prevented the enrichment of volatile organic compounds in the distilled water, but also avoided the production of the organics-concentrated water, resulting in no phenol residues detected in both distilled and outlet water. Meanwhile, the Joule heating from electrochemical reaction was applied as a supplementary heat source to accelerate steam generation, ensuring an evaporation rate of 1.2 times of that for bare SDIE. Besides, the he-EF assisted SDIE also presented an excellent environmental tolerance to pH 3 ∼ 9 and stability during evaporating phenol-added natural water in 5 cycles. This work is believed to open an avenue to develop high-performance synergic SIDE to achieve near zero discharge of organics for potential in-depth water treatment.
研究领域:
环境科学
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水资源管理
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Sustainable Materials and Technologies
·
2024
·
IF 8.6
Yu Shao,Jiawei Li,Dongming Qi
The conventional reactive dyeing of cotton fabrics creates a large amount of difficult-to-treat wastewater because of a low dye uptake and fixation and uses a large amount of dye-promoting electrolytes. In this research, cationic polyacrylate-encapsulated pigment-colored hybrid latex nanoparticles (PPNs) with three primary colors were synthesized by surfactant-free reversible addition–fragmentation chain transfer (RAFT) emulsion polymerization and then applied for the salt-free, near zero-discharge, and dyebath-recyclable cold pad dyeing of cotton fabrics with less water and energy consumption. The effect of the composition structure of PPNs on their color properties was systemically investigated, and the pad-dyed fabrics were compared with conventional salt-free dyeing samples. The results demonstrated that the PNNs pad-dyed cotton fabrics achieved satisfactory wet rubbing fastness (level 4), color strength , leveling property, hand feel, and air breathability. The color regulation and matching of the pad-dyed fabrics could be designed by adjusting the contents of three primary color PPNs due to their nanosize and intercompatibility, thus making it possible to rapidly manufacture colors. Furthermore, the PPNs dyebath proved to be recyclable for circular pad dyeing of cotton fabrics, remarkably reducing the wastewater discharge. Calculations showed that the comprehensive water, energy, and cost of 1 kg cotton fabrics could be reduced by about 88.9%, 58.5%, and 51.7%, respectively, compared with conventional pad dyeing with reactive dyes. This innovative salt-free and dyebath-recyclable circular cold pad dyeing technology not only significantly reduces pollution generated and wastewater discharged, but also uses less water and energy, providing a valuable reference for environment-friendly near zero-discharge and sustainable pad dyeing methods for textiles.
研究领域:
纺织工程
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环境科学
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材料科学
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产品关联
DOI
高影响因子
Journal of Environmental Sciences
·
2023
·
IF 6.9
Meirong Wu,Wei Sun,Xiangsong Meng,Jianhua Kang,Yue Yang
Mineral processing wastewater (MPW) with large discharge and high toxicity affects environmental safety, and the realizing zero discharge of MPW is of great significance for reducing environmental pollution, saving water resources, and promoting the sustainable development of the mining industry. In this study, we reported natural marmatite (NM) as a low-cost and efficient photocatalyst for the treatment of MPW to help zero wastewater discharge. The photocatalytic activity of NM was evaluated by the removal of total organic carbon (TOC) from MPW under visible-light illumination, and the optimal degradation conditions were discussed. Results showed that superoxide free radicals ( · O 2 − ) were the dominant active species responsible for organic pollutants degradation, and 74.25% TOC removal was obtained after 120 min reaction under the optimum treatment conditions. Meanwhile, the wastewater treated by NM photocatalysis can be reused in the flotation system without adverse impact on the product index. Based on these findings, a model of zero wastewater discharge for flotation with the help of photocatalytic treatment was established, it indicated that the water of the whole system can be balanced without affecting the ore dressing index, which showed that visible light-driven photocatalyst has a promising application prospect in the treatment and recycling of industrial wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Yijun Chen,Meina Cheng,Yundong Wang,Long Jin,Juanhong Li,Hailiang Yang,Sanjian Ma,Guoliang Dai,Zixia Lin,Xin Liu
Both the iron sludge and usage of H 2 O 2 restrict the promotion of the Fenton reaction. Herein, we proposed a hydrogen-accelerated oxygen reduction Fenton reaction system named MHORF-UiO-66(Zr) to try to solve the two problems under normal temperature and pressure. The active hydrogen, which is derived from H 2 catalyzed by the composite of Pd/UiO-66(Zr), could accelerate the reduction of Fe(III) and promote the electron transfer of two-electron oxygen reduction reaction to realize the self-generation of H 2 O 2 . And 45.9 mM of H 2 O 2 could be detected. As expected, 91 % of trimethoprim (TMP) could be degraded within 30 min in this system in the condition of 25 μM Fe(II), H 2 30 mL·min −1 , and Pd/UiO-66(Zr) 2g·L −1 , which was 2.94 times that of the control Fenton system. Based on these results, the feasibility of fundamentally achieving zero emission of iron sludge was successfully verified. It was confirmed that both the hydroxyl radical and singlet oxygen played the dominant roles during the reaction process through the analysis of electron spin resonance spectroscopy. After six reaction cycles, the removal efficiency of TMP could be maintained at least 94 %. It found that both the properties and morphology of this composite could remain based on the systematic characterization.
研究领域:
环境科学
·
化学工程
·
催化材料
✓ 已验证
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Puxiang Yan,Haiyong Wang,Yuhe Liao,Pengyao Sun,Chenguang Wang
Catalytic valorization of biomass into chemicals and fuels plays a key role in order to achieve net-zero greenhouse gas emissions. Herein, a series of hierarchical ZSM-5 zeolites were synthesized by the post-treatment method to transform furfural alcohol (FAL) to levulinic acid (LA). ZSM-5 obtained from tandem alkaline treatment (0.2 M NaOH) and acid washing (0.1 M HCl), denoted as ZSM-5-OH 0.2 -H, exhibited the highest activity, affording 76.2% LA yield in 9:1 acetone–water mixed solvents at 393 K for 0.5 h. The enhanced adsorption capacity and acid accessibility of FAL on zeolite mediated by the introduction of mesopores, as well as the reduced secondary reactions of the generated LA due to few Al atoms in straight and sinusoidal channels (as confirmed by UV–vis diffuse reflectance), were responsible for the outstanding catalytic performance of ZSM-5-OH 0.2 -H. The structure–activity relationship revealed that regulating the porous structure and Al distribution of ZSM-5 was an effective strategy to enhance its hydrolytic performance of FAL to LA. Moreover, ZSM-5-OH 0.2 -H could be reused for three reaction cycles without significant loss in catalytic activity.
研究领域:
化学工程
·
催化
·
生物质转化
·
可持续化学
✓ 已验证
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2023
·
IF 5.9
Xiangfei Zhao,Xuchun Guo,Yanbin Wang,Qiong Su,Hongling Wang,Zhaoxia Li,Shaofeng Pang
In this paper, a high adhesion and zero aldehyde starch-based adhesive was reported to replace the traditional urea-formaldehyde adhesive. The adhesive was prepared by polycondensation reaction of the aldehyde group of the oxidized starch and the amino group of urea. Then, konjac glucomannan (KGM), milk protein (MP) and Glycidyl methacrylate (GMA) were combined to modify the prepared adhesive. Thus, the issues of free formaldehyde emission of urea-formaldehyde adhesive and poor water resistance and adhesion of starch adhesive were fundamentally solved. Through a series of study of process conditions and tests, the adhesive had excellent comprehensive performance with the viscosity of 2200 mPa·s, the water resistance time of 50.0 d, the dry shear strength of 3.20 MPa and the wet shear strength of 1.81 MPa when the total mass of modifier was 17.7 (wt% U-OSt). The morphology, molecular structure, crystalline structure, elemental analysis, thermal conversion behaviours of the adhesive were characterized by Scanning electron microscopy (SEM), Fourier transform-infrared spectroscopy (FT-IR), Solid-state nuclear magnetic resonance (NMR), X-ray diffffraction (XRD), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA).
研究领域:
材料科学
·
化学工程
·
生物材料
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2025
·
IF 3.3
Xiaoyue Wang,Rajapriya Andavar,Jiahong Xie,Wenli Liu,Yanzhi Sun,Yongmei Chen,Yang Tang,Pingyu Wan,Junqing Pan
Advanced, efficient, and eco-friendly technologies are essential for the safe recycling of spent lead-acid batteries for minimizing their environmental impact by mitigating toxic wastes and promoting resource sustainability by recovering valuable lead. Herein, we proposed a simple, zero-emission electrochemical strategy to recover metallic lead via the direct electrolysis of lead-acid batteries. MnxOy@RuO2 with a layered structure of stacked nanosheets was prepared via facile hydrothermal and annealing methods. MnxOy@RuO2 exhibited low overpotentials of 175 mV and 248 mV at a current density of 10 mA cm−2 in 0.5 mol L−1 H2SO4 and Pb(MSA)2, respectively, showcasing its excellent OER activity. Notably, the catalyst exhibited excellent stability for over 10 hours. The MnxOy@RuO2 catalyst during constant current electrolysis required an overpotential of only 375.6 mV at 25 mA cm−2 to function, greatly reducing the precipitation of PbO2. MnxOy@RuO2 facilitated high-efficiency oxygen evolution reaction using the lead MSA electrolyte, suppressing the PbO2 formation and reducing the anode overpotential, making it an ideal anode material for energy-efficient lead recovery.
研究领域:
电化学
·
材料科学
·
环境科学
·
能源技术
·
可持续资源回收
✓ 已验证
产品关联
DOI
PubMed
高影响因子
GREEN CHEMISTRY
·
2018
·Vol. 20
·期 20
·4710-4718
·
IF 8.586
Mingming Zhou,Chaolin Li,Haijian Luo,Jingwen Wang,Xue Sun
A laboratory scale closed-loop cycle system for the complete regeneration of sodium persulfate/sulfuric acid etching solution (SPS) has been developed by anode oxidation of sulfate paired to cathode reduction of copper. A current-efficient (110%), zero-chemical dosage and zero-emission strategy for complete regeneration of SPS and recovery of copper was achieved. The micro-etching rate of the recycled SPS has no significant difference compared with that of the fresh SPS. On average, the cost of etching in this recycling system is decreased by 100%, compared with that in the current printed circuit boards used in industries. The full utilization of spent SPS realizes waste to wealth conversion in the true sense. The developed recycling system is a techno-economically feasible, environmentally friendly, sustainable, clean and green process for the reuse of SPS and recovery of valuable metal Cu through electrooxidation of sulfate paired to electroreduction of copper.
研究领域:
电化学
·
环境工程
·
材料科学
·
废物管理
✓ 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）