Article
Engineering, Chemical
Chenghao Wang, Yuanping Cheng, Jingyu Jiang, Liang Wang, Minghao Yi
Summary: Gas adsorption can reduce coal breakage energy and prevent coal and gas outbursts. The increase in adsorption pressure and desorption duration decreases and increases the surface work, respectively. The reduction in surface work is primarily due to gas adsorbed in micropores with a size < 1.5 nm.
Article
Engineering, Environmental
Kanika Saxena, Urmila Brighu
Summary: Isolated studies for the evaluation of coagulation at different dimensions have been discussed. In this work, a comprehensive methodology was described, including dosing approach, mathematical modeling, chemical analysis, image analysis, and various analytical procedures. The results showed that RMSE, HYBRID, and Chi-Square could be successfully used for non-linear analysis, while ARE and MPSD could not be used at low concentrations. Additionally, image processing was used for analysis of floc size and fractal dimension.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Chemistry, Physical
Zulfauzein Nadra, Yizhou Sang, Peter Englezos
Summary: This study investigated the flocculation performance of two cationic starches with different charge densities with kaolin clay through small angle light scattering experiments. The results showed that shear and starch concentration were important factors affecting the floc size for both starches. Additionally, temperature was found to be significant only for the higher charge density cationic starch S880, while the combination effects of NaCl and starch concentration, as well as temperature and starch, were significant for the floc size of the S880 system. The combination effect of shear rate and NaCl was found to be significant for the floc size induced by the low charge density S858.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Multidisciplinary Sciences
Qindong Fan, Xuejian Mei, Chenming Zhang, Hang Wang
Summary: The analysis of urban spatial form is fundamental to urban development. Traditional fractal research often focuses on the urban spatial layout, lacking a visually expressive representation of the specific form, characteristics, and development trends of urban architectural spaces. This study simplifies urban architectural forms and establishes correlations between architectural form and fractal dimension. The case study reveals that Zhengzhou City exhibits obvious fractal characteristics in its architectural layout. The combination of two-dimensional and three-dimensional fractal dimensions helps to comprehensively reveal architectural layout information. This study promotes the visualization of fractal theory and its application to spatial gradients, providing theoretical and data references for optimizing urban spatial form.
Article
Multidisciplinary Sciences
Chuanxin Lou, Jinyu Xu, Tengjiao Wang, Weibo Ren
Summary: This paper investigates the microstructure and pore structure properties of polymer-cement composite joint sealants for pavements, and analyzes the effects of various material types, ratio parameters, and processing conditions. The study finds that measures such as increasing the powder-liquid ratio, blending with certain types of cement or powders, and adding certain agents can reduce the total pore volume and refine the pore structure of the sealants. However, using low-grade cement, blending with styrene-acrylic emulsion, or adding plasticizer will have the opposite effects.
SCIENTIFIC REPORTS
(2021)
Article
Engineering, Chemical
Williams H. Leiva, Eder Piceros, Pedro Robles, Ricardo I. Jeldres
Summary: The study analyzed the impact of shear rate on the structural properties of aggregates obtained during the flocculation of clay-based tailings with an anionic polyacrylamide. The results showed that an increase in shear rate in seawater leads to less compact aggregates with more open structures.
MINERALS ENGINEERING
(2022)
Article
Engineering, Chemical
Wanzhong Yin, Yu Xie, Jin Yao, Ningbo Song, Keqiang Chen, Xueming Yin
Summary: This study investigated the impact of floc morphology on flotation. Two types of flocs with similar particle sizes but different aggregation degrees were prepared by varying the stirring speed. Flotation tests showed that flocs with higher aggregation degrees had better floatability and higher flotation rate constants. Analysis revealed that flocs with higher aggregation degrees had higher fractal dimensions, more circular and compact overall morphology, and a more regular and uniform surface morphology. Additionally, experiments showed that flocs with higher fractal dimensions had increased adsorption of flocculant on the surface and enhanced hydrophobicity. Moreover, flocs with higher fractal dimensions had shorter induction times and larger coverage angles, indicating faster attachment between flocs and bubbles.
Rating: 9/1
MINERALS ENGINEERING
(2023)
Article
Environmental Sciences
Peng Du, Xing Li, Yanling Yang, Xiaoyan Fan, Xiaobo Fang, Zhiwei Zhou
Summary: The study compared the effects of two-stage addition of PACl and Al-2(SO4)(3) on coagulation efficiency and floc properties, optimizing the dose ratio of primary and secondary addition. Results showed that two-stage addition was less sensitive to pH variation and floc breakage improved colloidal particle removal.
ENVIRONMENTAL TECHNOLOGY
(2021)
Article
Environmental Sciences
Haiyang Zhang, Lili Li, Shaozhe Cheng, Cheng Li, Fangzhou Liu, Peizhong Wang, Lianjun Sun, Junbo Huang, Wen Zhang, Xuezhi Zhang
Summary: Co-coagulation flotation (CCF) is a novel flotation technology that is more efficient in algal removal compared to traditional mechanical coagulation flotation (MCF). This study compared the algal removal performance of continuous CCF and MCF using water samples from Lake Dianchi with severe Microcystis aeruginosa blooms. The results showed that CCF saved more than 50% of the coagulant/flocculant dosage compared to MCF while achieving a removal efficiency of over 95%. The flocs formed in CCF were larger, more spherical, and had a higher fractal dimension compared to those in MCF.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Chemical
Zhe Lin, Chengxuan Li, Xuezhi Zhang, Haiyang Zhang
Summary: This study compared a multi-stage velocity gradient fluidized bed flocculator (MGF) with a traditional mechanical stirring flocculator (MSF). The results showed that MGF achieved higher removal efficiency and faster settling performance, reducing sedimentation time. These findings provide a theoretical foundation for the design and practical application of efficient fluidized bed flocculators.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Mathematics, Interdisciplinary Applications
Gui Yang, Zhuanzhuan Chen, Yifei Sun, Yang Jiang
Summary: Particle breakage has a significant impact on the mechanical properties of granular materials. This study investigated the effects of confining pressure, relative density, and initial grading on the particle breakage behavior of granular materials. The results show that particle breakage increases with increasing confining pressure or relative density, but decreases with increasing coefficient of uniformity. The grading curves of the granular materials after triaxial tests can be simulated by a power-law function with fractal dimension. A normalized relation between the particle breakage extent and confining pressure considering relative density and grading index was also found.
FRACTAL AND FRACTIONAL
(2022)
Article
Mathematics, Interdisciplinary Applications
Cheng Chen, Xin Zhang, Yifei Sun, Lei Zhang, Rui Rui, Zhide Wang
Summary: Particle breakage significantly affects the particle size distribution and mechanical behavior of ballast on railways. A simulation using the discrete element method was conducted to analyze the contact orientations and particle breakage from a micromechanical perspective. The results showed that increased confining pressure and axial strain led to higher grain breakage and fractal dimension of the ballast. The analysis also revealed that first-generation breakage accounted for the majority, while subsequent generations decreased in proportion. Additionally, there was a linear correlation between fractal dimension and grain breakage, while a quadratic curve relation was observed between fractal dimension and volumetric strain.
FRACTAL AND FRACTIONAL
(2022)
Article
Engineering, Marine
Lan Lin, Sa Li, Linying Huo, Xin Liu
Summary: This paper systematically investigates the fractal behavior of coral sand in the South China Sea under impact loads. It finds that the gradation curve of coral sand exhibits evident fractal characteristics after fragmentation, and the ultimate fractal dimension is independent of particle size and uniformity coefficient. A relative breakage index based on the relationship between fractal dimensions is proposed.
Article
Geochemistry & Geophysics
Chongchong Han, Yuye Tan, Lishen Chu, Weidong Song, Xin Yu
Summary: This study investigated the effects of flocculant type on the flocculation and settling performance of ultra-fine tailings. Through experimental analysis and microscopic observation, the best flocculant type and dosage parameters were determined for efficient flocculation and sedimentation.
Article
Green & Sustainable Science & Technology
Petros Gkotsis, Manassis Mitrakas, Anastasios Zouboulis
Summary: This study describes a novel and patented process for the on-site synthesis and direct utilization of Polyferric Chloride (PFC) at low Fe concentration dosing, which can potentially replace Polyaluminium Chloride (PAC) for surface water treatment. The effectiveness of PFC was examined in terms of total organic carbon (TOC) removal and residual Fe concentration, and the optimal conditions were identified.
Article
Engineering, Environmental
Lu Elfa Peng, Zhikan Yao, Xin Liu, Baolin Deng, Hao Guo, Chuyang Y. Tang
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2019)
Article
Engineering, Chemical
Weiyi Li, Xin Liu, Zhuo Li, Anthony G. Fane, Baolin Deng
Article
Engineering, Chemical
Zhuo Li, Xin Liu, Gan Chen, Baolin Deng, Weiyi Li
JOURNAL OF MEMBRANE SCIENCE
(2019)
Article
Engineering, Environmental
Yichao Wu, Norazean Zaiden, Xin Liu, Manisha Mukherjee, Bin Cao
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2020)
Article
Engineering, Chemical
Xin Liu, Gan Chen, Guoquan Tu, Zhuo Li, Baolin Deng, Weiyi Li
JOURNAL OF MEMBRANE SCIENCE
(2020)
Article
Chemistry, Multidisciplinary
Shuyu Shi, Xin Liu, Weiyi Li, Zhuo Li, Guoquan Tu, Baolin Deng, Chongxuan Liu
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2020)
Article
Biochemistry & Molecular Biology
Xin Liu, Ge Liu, Weiyi Li, Qinyu Wang, Baolin Deng
Article
Engineering, Chemical
Jie Liu, Yewei Wang, Zhuo Li, Xin Liu, Weiyi Li
Summary: This study investigates the impact of calcium sulfate scaling on membrane distillation (MD) processes through a mathematical model and experimental characterization, uncovering how changes in the geometrical characteristics of the scaling layer affect vapor flux and ultimately improve MD performance.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Environmental
Jie Liu, Zhuo Li, Yewei Wang, Xin Liu, Guoquan Tu, Weiyi Li
Summary: This study used optical coherence tomography (OCT) to investigate calcium sulfate scaling in membrane distillation (MD), revealing that the reduction in evaporation rate is dominated by different mechanisms as crystalline particles grow and deposit on the membrane surface. The striping phenomenon visualized by mapping local growth rates provided evidence for hydrodynamic instability induced by coupled mass and heat transfer in MD.
Article
Biochemistry & Molecular Biology
Jing Wei, Qianhong She, Xin Liu
Summary: This study systematically characterized four typical commercial osmotic membranes and revealed the interrelationship of membrane properties under different conditions, providing a framework for membrane optimization.
Article
Engineering, Chemical
Guoquan Tu, Xin Liu, Zhuo Li, Shengzhe Li, Jie Liu, Weiyi Li
Summary: This study utilized OCT to characterize the gelation process of chitosan dissolved in LiOH/urea aqueous solution, revealing the competition mechanism during gel formation. The research demonstrated that adjusting the concentration of alkali can effectively influence the porous morphology of chitosan membranes.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Editorial Material
Biochemistry & Molecular Biology
Xue Jin, Xin Liu
Article
Engineering, Chemical
Guoquan Tu, Shengzhe Li, Yuxiao Han, Zhuo Li, Jie Liu, Xin Liu, Weiyi Li
Summary: This study compares the effects of acidic and alkaline dissolution mechanisms on the preparation of chitosan membranes. Optical coherence tomography (OCT) is used to analyze the gelation behavior of chitosan and the mechanisms behind particle rejection. The study finds that the morphological evolution of the gelation layer significantly impacts the porous structure of the resulting chitosan membrane, affecting water permeability and particle rejection. The study highlights the importance of understanding the structure-performance relationship and provides valuable insights for improving chitosan membranes.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Environmental
Jie Liu, Yewei Wang, Shengzhe Li, Zhuo Li, Xin Liu, Weiyi Li
Summary: This study aims to analyze the interplay between growing crystals and porous structures in membrane distillation (MD) processes, in order to address the wetting issue. Optical coherence tomography (OCT) was used to measure membrane shift and correlate scaling-induced deformation with stress variation in the crystal-containing layer. Along with stress analysis and conventional approaches, the dependence of scaling-induced wetting on crystallizing species concentration rate at high supersaturation was determined.
Article
Engineering, Chemical
Xin Liu, Dongyu Du, Guoquan Tu, Weiyi Li
JOURNAL OF MEMBRANE SCIENCE
(2020)
Article
Engineering, Environmental
Rong-Gui Zhu, Chang-Gui Pan, Feng-Jiao Peng, Chao-Yang Zhou, Jun-Jie Hu, Kefu Yu
Summary: This comprehensive survey investigated the occurrence, bioaccumulation, and trophic magnification of parabens and their metabolite 4-HB in a marine food web. Results showed that parabens were the predominant pollutants in marine organisms, with significant bioaccumulation from sediments. The estimated trophic magnification factor indicated biomagnification for MeP and trophic dilution for 4-HB. Overall, the risks for humans consuming marine organisms were found to be low.
Article
Engineering, Environmental
Andres F. Torres-Franco, Deborah Leroy-Freitas, Cristina Martinez-Fraile, Elisa Rodriguez, Pedro A. Garcia-Encina, Raul Munoz
Summary: Anaerobic and microalgae-based technologies have emerged as sustainable alternatives for municipal wastewater treatment. However, the presence of viruses in the treated wastewater is a major concern for reuse applications. This study assessed the ability of these technologies to reduce viruses during secondary wastewater treatment. The results showed that all technologies were effective in reducing the concentration of viruses, with microalgae-based treatment exhibiting the highest potential for reducing the disinfection requirements of treated wastewater.
Article
Engineering, Environmental
Young Gwang Kim, Sae Yun Kwon, Spencer J. Washburn, Scott C. Brooks, Ji Won Yoon, Lucien Besnard
Summary: The study uses Hg isotope ratios to identify the sources and exposure pathways of mercury in bivalves, finding that dissolved Hg phases in the water column are the primary source and exposure pathway to bivalves. This provides new insights into using bivalves as bioindicators for sediment quality monitoring.
Article
Engineering, Environmental
Hui Geng, Ying Xu, Rui Liu, Dianhai Yang, Xiaohu Dai
Summary: This study investigates the effect of cation exchange resin (CER) on the sequential recovery of hydrogen and methane from anaerobic digestion (AD) and the corresponding mechanisms. The results show that CER can simultaneously enhance the production of hydrogen and methane by promoting the solubilisation, hydrolysis, and acidification of organic matter. Additionally, CER facilitates effective contact between bacteria and organic particulates and reduces the energy barrier for mass transfer during methane production. The study also reveals changes in the microbial community structure and metagenomics during the AD process.
Article
Engineering, Environmental
Xiaojing Lin, Zhan Jin, Shunfeng Jiang, Zhiquan Wang, Suqing Wu, Ke Bei, Min Zhao, Xiangyong Zheng
Summary: Dehumidification combined with addition of absorbent resin supplement (ARS) was used to achieve rapid evaporation of non-pretreated urine, resulting in high water evaporation efficiency and nutrient recovery.
Article
Engineering, Environmental
Yangli Che, Chaoran Lin, Shen Li, Jiao Liu, Longhai Zhu, Shilei Yu, Nan Wang, Haoshuai Li, Mutai Bao, Yang Zhou, Tonghao Si, Rui Bao
Summary: Hydrodynamic processes play a crucial role in the transmission of sediments, microbial assembly, and organic carbon redistribution in the ocean. Through experiments and analysis, we found that hydrodynamics shape the assembly of microbial communities and control the redistribution of different sourced organic carbon, thereby influencing microbial-mediated biogeochemical transformation.
Article
Engineering, Environmental
Chao Chen, Yu Yang, Nigel J. D. Graham, Zhenyu Li, Xingtao Yang, Zhining Wang, Nadia Farhat, Johannes S. Vrouwenvelder, Li -an Hou
Summary: The fouling of seawater reverse osmosis membranes is a persistent challenge in desalination. This study monitored the operational performance of a desalination plant for 7 years and the fouling development in different areas of membrane modules. The findings showed that operational performance declined over time and fouling mainly occurred at the feed side of the modules, with the highest microbial diversity. Keystone species like Chloroflexi and Planctomycetes played an important role in maintaining community structure and biofilm maturation. Polysaccharides, soluble microbial products, marine humic acid-like substances, and inorganic substances contributed to fouling. Overall, biofouling had a significant impact on membrane fouling after 7 years of operation.
Article
Engineering, Environmental
Dan Li, Jieyi Sun, Yibo Fu, Wentao Hong, Heli Wang, Qian Yang, Junhong Wu, Sen Yang, Jianhui Xu, Yunfei Zhang, Yirong Deng, Yin Zhong, Ping'an Peng
Summary: Sulfidation-oxidation treatment of magnetite (Fe3O4) enhances the production of dark center dot OH, which can efficiently degrade dissolved organic matter (DOM) and accelerate carbon cycling.
Article
Engineering, Environmental
Cheng Yu, Kaijun Wang, Kaiyuan Zhang, Ruiyang Liu, Pingping Zheng
Summary: This study implemented a microaerobic-aerobic configuration in a full-scale municipal wastewater treatment facility and investigated the effects on sludge characteristics, pollutant removal, microbial community, and granulation mechanisms. The results showed successful transition from flocculent-activated sludge to well-defined AGS after two months of operation. The primary pathways for pollutant removal were simultaneous nitrification, denitrification, and phosphorus removal. Moreover, the incorporation of internal separators induced shifts in the flow pattern, which promoted granulation.
Article
Engineering, Environmental
Zhe Zhang, Shaoyang Hu, Guangrong Sun, Wei Wang
Summary: Halogenated aromatic disinfection byproducts (DBPs), such as halogenated phenols, have garnered widespread attention due to their high toxicity and prevalence. This study reports on the analysis, occurrence, and cytotoxicity of a group of emerging halogenated aromatic DBPs, known as halogenated polyhydroxyphenols (HPPs), in drinking water.
Article
Engineering, Environmental
Shengyue Chen, Jinliang Huang, Peng Wang, Xi Tang, Zhenyu Zhang
Summary: Accurate prediction of river water quality is crucial for sustainable water management. This study introduces wavelet analysis and transfer learning techniques to assist LSTM modeling, proposing a newly coupled modeling approach that improves short-term prediction of river water quality.
Article
Engineering, Environmental
Bang Du, Xinmin Zhan, Piet N. L. Lens, Yifeng Zhang, Guangxue Wu
Summary: Efficient anaerobic digestion relies on the cooperation of different microorganisms with different metabolic pathways. This study investigated the effects of different operational modes and the addition of powdered activated carbon (PAC) on ethanol metabolic pathways. The results showed that the SBR mode and the presence of CO2 facilitated ethanol metabolism towards propionate production, while the CFR mode with extended solids retention time enriched Geobacter. Adjusting operational modes and PAC addition can modulate anaerobic ethanol metabolism and enrich Geobacter.
Article
Engineering, Environmental
Wanfa Wang, Si-Liang Li, Jun Zhong, Yuanbi Yi, Fujun Yue, Zenglei Han, Qixin Wu, Ding He, Cong-Qiang Liu
Summary: This study compares the carbon biogeochemical processes in karst and non-karst regions within large thermal stratified river-reservoir systems. The results demonstrate that karst reservoirs have a reduced potential for carbon emissions and highlight the importance of considering geologic settings to improve accuracy in regional and global CO2 emission estimates.
Article
Engineering, Environmental
Chunxia Jiang, Zelong Zhao, Dong Zhu, Xiong Pan, Yuyi Yang
Summary: This study analyzed the occurrence and distribution of antibiotic resistance genes (ARGs) in different environmental media of the Yangtze River using metagenomics. Core resistome dominated by multidrug resistance genes was found in all samples, while rare resistome dominated by various resistance genes was more prevalent in plasmids. Specific bacteria were identified as hosts for both core and rare resistomes, with high clinical concern ARGs found in the rare resistome. Particle-associated environment provided the most ideal conditions for resistome hosts. This study provided insights into the genetic locations of ARGs and the community assembly mechanisms of ARG hosts in freshwater environments.
Article
Engineering, Environmental
Yu Zhang, Yongtao He, Linchun Jia, Lei Xu, Zheng Wang, Yueling He, Ling Xiong, Xumeng Lin, Hong Chen, Gang Xue
Summary: By synergizing organic carbon source, thiosulfate, and zero-valent iron, efficient mixotrophic denitrification of oligotrophic secondary effluent can be achieved. Thiosulfate plays a vital role in promoting TN removal efficiency, while corrosion of Fe0 releases OH- to neutralize H+ from thiosulfate-driven denitrification, creating a suitable environment for denitrification. The coordination of thiosulfate and Fe0 maintains the dominance of Thiobacillus for denitrification.
