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Prof. Junfeng Wang
College of Civil and Transportation Engineering, Shenzhen Umiversity

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Research Keywords & Expertise

0 Marine engineering material concrete
0 concrete anti-corrosion
0 Building repair
0 The scientific research, production, quality management and application of new chemical building materials.
0 Organic paint and mortar

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Journal article
Published: 10 July 2021 in International Biodeterioration & Biodegradation
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The corrosion of concrete materials in urban sewage pipes by microorganisms is a serious issue in wastewater networks around the world. There has been no systematic study conducted on material corrosion by microorganisms, particularly for high-salt environments in coastal cities. This study compared and analysed reactors under different salinities, and the 16S ribosomal ribonucleic acid gene sequence method was used to analyze the bacterial communities associated with concrete corrosion. Redundancy analysis demonstrated that chemical oxygen demand, volatile fatty acids, and sulphate altered the structure and distribution of the microbial community. The predominant bacteria, Proteobacteria, accounted for 41.85% of the seawater group. Among them, the sulphur functional microorganism, Desulfomicrobium, accounted for 4.14%. These bacteria can decompose macromolecular organic matter to provide energy for reproduction. Furthermore, they continue to provide sulphur for the eosinophilic sulphur-oxidising bacteria attached to the surface of the high alkaline concrete sample. The aggregated sulphur-oxidising bacteria produce biological sulphuric acid, leading to corrosion and damage to the concrete structure. Salinity promoted the aggregation of corrosion-inducing bacteria, accelerating the growth of corroding microorganisms on the concrete material of coastal urban sewage pipes.

ACS Style

Jingya Zhou; Shouyi Yin; Qionglin Fu; Qingqing Wang; Qing Huang; Junfeng Wang. Microbial-induced concrete corrosion under high-salt conditions: Microbial community composition and environmental multivariate association analysis. International Biodeterioration & Biodegradation 2021, 164, 105287 .

AMA Style

Jingya Zhou, Shouyi Yin, Qionglin Fu, Qingqing Wang, Qing Huang, Junfeng Wang. Microbial-induced concrete corrosion under high-salt conditions: Microbial community composition and environmental multivariate association analysis. International Biodeterioration & Biodegradation. 2021; 164 ():105287.

Chicago/Turabian Style

Jingya Zhou; Shouyi Yin; Qionglin Fu; Qingqing Wang; Qing Huang; Junfeng Wang. 2021. "Microbial-induced concrete corrosion under high-salt conditions: Microbial community composition and environmental multivariate association analysis." International Biodeterioration & Biodegradation 164, no. : 105287.

Journal article
Published: 04 June 2021 in Molecules
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Dissolved organic matter (DOM) greatly influences the transformation of nutrients and pollutants in the environment. To investigate the effects of pyrolysis temperatures on the composition and evolution of pyroligneous acid (PA)-derived DOM, DOM solutions extracted from a series of PA derived from eucalyptus at five pyrolysis temperature ranges (240–420 °C) were analysed with Fourier transform infrared spectroscopy, gas chromatography–mass spectroscopy, and fluorescence spectroscopy. Results showed that the dissolved organic carbon content sharply increased (p< 0.05) with an increase in pyrolysis temperature. Analysis of the dissolved organic matter composition showed that humic-acid-like substances (71.34–100%) dominated and other fluorescent components (i.e., fulvic-acid-like, soluble microbial by-products, and proteinlike substances) disappeared at high temperatures (>370 °C). The results of two-dimensional correlation spectroscopic analysis suggested that with increasing pyrolysis temperatures, the humic-acid-like substances became more sensitive than other fluorescent components. This study provides valuable information on the characteristic evolution of PA-derived DOM.

ACS Style

Genmao Guo; Qingqing Wang; Qing Huang; Qionglin Fu; Yin Liu; Junfeng Wang; Shan Hu; Ondřej Mašek; Luya Wang; Ju Zhang. Effect of Pyrolysis Temperature on the Characterisation of Dissolved Organic Matter from Pyroligneous Acid. Molecules 2021, 26, 3416 .

AMA Style

Genmao Guo, Qingqing Wang, Qing Huang, Qionglin Fu, Yin Liu, Junfeng Wang, Shan Hu, Ondřej Mašek, Luya Wang, Ju Zhang. Effect of Pyrolysis Temperature on the Characterisation of Dissolved Organic Matter from Pyroligneous Acid. Molecules. 2021; 26 (11):3416.

Chicago/Turabian Style

Genmao Guo; Qingqing Wang; Qing Huang; Qionglin Fu; Yin Liu; Junfeng Wang; Shan Hu; Ondřej Mašek; Luya Wang; Ju Zhang. 2021. "Effect of Pyrolysis Temperature on the Characterisation of Dissolved Organic Matter from Pyroligneous Acid." Molecules 26, no. 11: 3416.

Journal article
Published: 31 March 2021 in Sustainability
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Biowaste materials could be considered a renewable source of fertilizer if methods for recovering P from waste can be developed. Over the last few decades, there has been a high level of interest in using biochar to remove contaminants from aqueous solutions. This study was conducted using a range of salts that are commonly found in biogas slurry (ZnCl2, FeCl3, FeCl2, CuCl2, Na2CO3, and NaHCO3). Experiments with a biogas digester and aqueous solution were conducted at pH nine integration with NH4 +, Mg2+, and PO4 3− molar ratios of 1.0, 1.2, and 1.8, respectively. The chemical analysis was measured to find out the composition of the precipitate, and struvite was employed to remove the aqueous solutions. The study found that the most efficient removal of phosphate and ammonium occurred at pH nine in Tongan sludge urban biochar and rice biochar, respectively. Increasing the concentration of phosphate and ammonium increased the phosphate and ammonium content. Moreover, increasing the biochar temperature and increasing the concentration of phosphate and ammonium increased the efficiency of the removal of ammonium and phosphate. The removal efficiency of ammonium and phosphate increased from 15.0% to 71.0% and 18.0% to 99.0%, respectively, by increasing the dose of respective ions K+, Zn2+, Fe3+, Fe2+, Cu2+, and CO3 2.The elements were increased from 58.0 to 71.0 for HCO3 − with the increasing concentration from 30 mg L−1 to 240 mg L−1.This study concluded that phosphate and ammonium can be recovered from mushroom soil biochar and rice biochar, and phosphate can be effectively recovered via the struvite precipitation method.

ACS Style

Aftab Kubar; Qing Huang; Muhammad Sajjad; Chen Yang; Faqin Lian; Junfeng Wang; Kashif Kubar. The Recovery of Phosphate and Ammonium from Biogas Slurry as Value-Added Fertilizer by Biochar and Struvite Co-Precipitation. Sustainability 2021, 13, 3827 .

AMA Style

Aftab Kubar, Qing Huang, Muhammad Sajjad, Chen Yang, Faqin Lian, Junfeng Wang, Kashif Kubar. The Recovery of Phosphate and Ammonium from Biogas Slurry as Value-Added Fertilizer by Biochar and Struvite Co-Precipitation. Sustainability. 2021; 13 (7):3827.

Chicago/Turabian Style

Aftab Kubar; Qing Huang; Muhammad Sajjad; Chen Yang; Faqin Lian; Junfeng Wang; Kashif Kubar. 2021. "The Recovery of Phosphate and Ammonium from Biogas Slurry as Value-Added Fertilizer by Biochar and Struvite Co-Precipitation." Sustainability 13, no. 7: 3827.

Journal article
Published: 17 November 2020 in Chemosphere
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Plastic mulch film residues (PMFR) accumulated throughout mulching years can result in serious environmental problems, especially in hotter areas with frequent farming (e.g. the tropics). The effects of long-term mulching on the soil-microbe-plant system, however, are largely unknown. As mulching years is positively correlated with PMFR concentrations, we used a controlled pot experiment to investigate the effects of mulching years (20a: The concentration of PMFR is about 2 g kg−1, 60a: About 6 g kg−1) on rice growth, rhizosphere bacterial communities, and soil organic carbon (SOC) under different soil pH conditions. Mulching years reduced rice growth; 20a showed more negative effects than 60a on rice tillers number and biomass. PMFR changed the composition, diversity, and metabolic function of the rhizosphere bacterial communities. The content of SOC decreased as mulching residues increased; total organic carbon (TOC), soil organic matter (SOM), Fn (355), and humification index (HIX) declined by 30.24%, 55.97%, 59.74%, and 70.24%, respectively. Furthermore, significant correlations between bacterial communities and SOC were observed in the soil-microbe-plant system. PMFR showed stronger negative effects on rice growth in acidic soil (pH 4.5); however, in basic soil (pH 8.5), there were stronger variations within the bacterial communities and a more significant decline in SOC than acidic soil (pH 4.5). The results of this study are expected to provide theoretical references for understanding of the effects of PMFR on agroecosystems and preventing and controlling plastic pollution.

ACS Style

Yin Liu; Qing Huang; Wen Hu; Jiemin Qin; Yingrui Zheng; Junfeng Wang; Qingqing Wang; Yuxin Xu; Genmao Guo; Shan Hu; Li Xu. Effects of plastic mulch film residues on soil-microbe-plant systems under different soil pH conditions. Chemosphere 2020, 267, 128901 .

AMA Style

Yin Liu, Qing Huang, Wen Hu, Jiemin Qin, Yingrui Zheng, Junfeng Wang, Qingqing Wang, Yuxin Xu, Genmao Guo, Shan Hu, Li Xu. Effects of plastic mulch film residues on soil-microbe-plant systems under different soil pH conditions. Chemosphere. 2020; 267 ():128901.

Chicago/Turabian Style

Yin Liu; Qing Huang; Wen Hu; Jiemin Qin; Yingrui Zheng; Junfeng Wang; Qingqing Wang; Yuxin Xu; Genmao Guo; Shan Hu; Li Xu. 2020. "Effects of plastic mulch film residues on soil-microbe-plant systems under different soil pH conditions." Chemosphere 267, no. : 128901.

Journal article
Published: 28 August 2020 in Chemosphere
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Heavy metals in soil are harmful to human health via the food chain, but little is known about the mechanism of reducing bioavailability of Cd or Pb to maize (Zea mays L.) by applying complex amendments to soil. A field experiment was conducted at a tropical site in Hainan Province, China, that had been subjected to soil pollution by Cd and Pb from past mining activities. There were ten treatment groups comprising a mixture of biochar, hydroxyapatite (HAP), manure, and plant ash in varying proportions and at three different rates. Compared with untreated soil, all treatments increased pH by 2–3 units in bulk soil or 1–2 units in rhizosphere soil. For all amendments, the concentration of Cd in all parts of maize plants was decreased compared with unamended soil, but this effect was much smaller for Pb. The greatest effect was found with a mixture containing the ratio of HAP:manure:biochar:plant ash as 6:4:2:1 when applied at 20.1 t ha-1. The dominant microbial group in contaminated soil was Proteobacteria. There is evidence that this group can immobilize Cd by mechanisms that include biosorption and bioprecipitation. It was concluded that the mixed amendments containing biochar, HAP, manure, and plant ash can be useful in decreasing Cd uptake by maize. The amendment in this study likely operates through a combination of soil chemical changes and by influencing the soil-microbe-plant interaction.

ACS Style

Qingqing Wang; Qing Huang; Genmao Guo; Jiemin Qin; Junyi Luo; Zhiqiang Zhu; Yi Hong; Yuxin Xu; Shan Hu; Wen Hu; Chen Yang; Junfeng Wang. Reducing bioavailability of heavy metals in contaminated soil and uptake by maize using organic-inorganic mixed fertilizer. Chemosphere 2020, 261, 128122 .

AMA Style

Qingqing Wang, Qing Huang, Genmao Guo, Jiemin Qin, Junyi Luo, Zhiqiang Zhu, Yi Hong, Yuxin Xu, Shan Hu, Wen Hu, Chen Yang, Junfeng Wang. Reducing bioavailability of heavy metals in contaminated soil and uptake by maize using organic-inorganic mixed fertilizer. Chemosphere. 2020; 261 ():128122.

Chicago/Turabian Style

Qingqing Wang; Qing Huang; Genmao Guo; Jiemin Qin; Junyi Luo; Zhiqiang Zhu; Yi Hong; Yuxin Xu; Shan Hu; Wen Hu; Chen Yang; Junfeng Wang. 2020. "Reducing bioavailability of heavy metals in contaminated soil and uptake by maize using organic-inorganic mixed fertilizer." Chemosphere 261, no. : 128122.

Journal article
Published: 20 May 2020 in Construction and Building Materials
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To improve the durability of concrete structures used in offshore sewage treatment plants (STPs), a high-salt resistance concrete (HSRC) prepared by mixing multiple mineral admixtures was developed in this study. The effect of artificial high-salt sewage, simulated “wastewater” on properties of the HSRC was investigated and the mechanism of salt resistance was proposed. The results show that the corrosion resistance coefficient (Kf) of concretes cured in wastewater decreased and their relative chloride permeability coefficient (Pn) increased as the curing age from 7 to 150 d. Moreover, the Kf of the HSRC composed of slag, basalt powder and desulfurized gypsum by 69.4% replacement of cement, was 47.8% higher than that of normal concrete after 150 d of curing, while the Pn of the HSRC was 12.5% lower than that of normal concrete. However, excessive replacement basalt powder in cement probably resulted in negative effects. Furthermore, when cured in wastewater, the Ca(OH)2 and C-S-H gel produced in pastes, which were the concretes with aggregates removed, were consumed by corrosive ions and formed corrosion products consisting of gypsum, syngenite, and thaumasite crystals, etc., which were generated in the HSRC pastes with aggregates removed, were fewer than those of other samples. Further, the porosity of the HSRC pastes in freshwater was smaller than that of other samples, which contributed to pastes’ ability to resist permeation of corrosive ions. The results of this study have practical engineering significance to the safety of concrete structures used in the high salt environments of offshore STPs.

ACS Style

Qionglin Fu; Yuejun Wu; Nannan Zhang; Shan Hu; Fei Yang; Liulei Lu; Junfeng Wang. Durability and mechanism of high-salt resistance concrete exposed to sewage-contaminated seawater. Construction and Building Materials 2020, 257, 119534 .

AMA Style

Qionglin Fu, Yuejun Wu, Nannan Zhang, Shan Hu, Fei Yang, Liulei Lu, Junfeng Wang. Durability and mechanism of high-salt resistance concrete exposed to sewage-contaminated seawater. Construction and Building Materials. 2020; 257 ():119534.

Chicago/Turabian Style

Qionglin Fu; Yuejun Wu; Nannan Zhang; Shan Hu; Fei Yang; Liulei Lu; Junfeng Wang. 2020. "Durability and mechanism of high-salt resistance concrete exposed to sewage-contaminated seawater." Construction and Building Materials 257, no. : 119534.

Articles
Published: 13 May 2020 in European Journal of Environmental and Civil Engineering
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In this article, the mechanical properties and material characterisation of graphite tailings concrete, in which graphite tailings are replaced as sand were investigated. The results showed that the concentration of graphite tailings has influence on the comprehensive performance of concrete. Simultaneously, the graphite tailings have an important improvement on reducing the mesostructure distribution and micro-crack density of cement-based materials. However, high content of graphite tailings can result in the growth on defects and significantly reduces strength properties. How to solve the adverse effect of high content of graphite tailings on reduced mechanical strength of concrete or taking full advantage of this material property and characteristics of graphite tailings is an urgent problem to be solved in the future research for practical engineering applications such as road subgrades, coastal breakwaters and so on.

ACS Style

Hongbo Liu; Jing Xue; Ben Li; Junfeng Wang; Xuetao Lv; Jing Zhang. Effect of graphite tailings as substitute sand on mechanical properties of concrete. European Journal of Environmental and Civil Engineering 2020, 1 -19.

AMA Style

Hongbo Liu, Jing Xue, Ben Li, Junfeng Wang, Xuetao Lv, Jing Zhang. Effect of graphite tailings as substitute sand on mechanical properties of concrete. European Journal of Environmental and Civil Engineering. 2020; ():1-19.

Chicago/Turabian Style

Hongbo Liu; Jing Xue; Ben Li; Junfeng Wang; Xuetao Lv; Jing Zhang. 2020. "Effect of graphite tailings as substitute sand on mechanical properties of concrete." European Journal of Environmental and Civil Engineering , no. : 1-19.