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Provenance Analyses of Lower Cretaceous Strata in the Liupanshan Basin: From Paleocurrents Indicators, Conglomerate Clast Compositions, and Zircon U-Pb Geochronology

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Journal of Earth science 2020年第4期31卷 757-771页

作者： Xiaochen Zhao Chiyang Liu Jianqiang Wang Wei Luo Fangpeng Du Li Ma College of Geology and Environment Xi'an University of Science and TechnologyXi'an 710054China State Key Laboratory of Continental Dynamics Department of GeologyNorthwest UniversityXi'an 710069China BGP Inc. China National Petroleum Corporation Southwest Geophysical Research InstituteChengdu 610000China College of Energy Engineering Xi'an University of Science and TechnologyXi'an 710054China

The Liupanshan Basin constitutes a major portion of the northern North-South tectonic belt. The Lower Cretaceous strata in the Liupanshan Basin recorded the tectono-sedimentary evolution processes of this area and are pivotal for understanding the original sedimentary appearance of the Liupanshan Basin. In this work, we present a study of provenance and tectono-sedimentary evolution of the Liupanshan Basin during the Early Cretaceous. Integrated-paleocurrent directions, gravel clast compositions, and detrital zircon U-Pb isotopic analysis of the Lower Cretaceous Sanqiao and Heshangpu formations were applied to determine the provenance. The gravel clast compositions of Sanqiao Formation conglomerates(mainly including magmatic rocks, metamorphic rocks and limestones) display various features in different places, revealing different rock components of source areas. The paleocurrent directions of the Sanqiao and Heshangpu formations suggest that the sediments were transported from the basin margin to the center. Detrital zircons of two samples from the Huoshizhai Section(northwestern Liupanshan Basin) yield a dominant unimodal distribution from 420 to 500 Ma, suggesting a single-sourced provenance. Based on the above analyses, comparing to the magmatic records in the Qilian-Qinling orogenic belt, the detritus of the Sanqiao and Heshangpu formations were mainly from the proximal metamorphic and magmatic rocks of the Qilian-Qinling orogenic belt and the limestones of the archaic uplift. Combined with sedimentary characteristics, we concluded that the Liupanshan Basin experienced multi-stage evolution history:(1) the early rifting extension stage(Sanqiao Period),(2) the middle spanning and depression stage(Heshangpu–Early Naijiahe Period), and(3) the late extinction stage(Late Naijiahe Period). The evolution of Liupanshan Basin is closely related to that of Ordos Basin and it is further associated with tectonic transition of the northern North-South tectonic belt.

关键词： provenance analyses tectono-sedimentary evolution Liupanshan Basin Lower Cretaceous North-South tectonic belt

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Effect of Co-Pyrolysis of Sewage Sludge with Different Plastics on the Nitrogen, Sulfur, and Chlorine Releasing Characteristics and the Heavy Metals Ecological Risk

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SSRN 2023年

作者： Shen, Jia Wu, Yan Lan, Guoxin Xia, Yaping Yan, Bin Li, Yurong Zhang, Yuexin Yu, Yue Fu, Chuan Xu, Anji Zhou, Jie Zhu, Ailing Chen, Dan Chongqing Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir Chongqing Three Gorges University Wan Zhou 404100 China College of Environmental Science and Engineering Beijing Forestry University Beijing100083 China Chongqing GreenKarbon Environmental Protection Technology Co. Ltd. Chongqing400050 China

The high calorific value, low ash content and high volatility of the plastic can neutralize the defects of the single pyrolysis of the sludge, which can improve the quality of the pyrolysis products. However, secondary contaminants may be generated during the co-pyrolysis of sludge and plastics. Plastics contain polluting elements that may also enter SS, so different plastics may affect the release of N, S and Cl as well as the ecological risk of heavy metals. In this study, polypropylene (PP), polyamide 6 (PA6) and polyvinyl chloride (PVC) were added to sludge to analyze the release of N, S and Cl from sludge pyrolysis products by different plastics. And an environmental risk assessment was also carried out for different forms of heavy metals. The results showed that PP, PA6 and PVC increased the total mass losses of sludge by 16.88%, 6.82% and 9.46%, respectively, inhibiting the release of NH3, CH3Cl, H2S and SO2 harmful gases from sludge. PP and PA6 increased the calorific value of pyrolysis oil and release more aliphatic hydrocarbons and alcohols. However, PA6 and PVC will increase the release of HCN and HCl respectively. The presence of plastics made the carbon structure of biochar more stable, especially PP and PA6 can enrich the pore structure and surface properties of biochar. PA6 and PVC reduce the potential ecological risk of biochar. These results will provide new insights into the co-pyrolysis of sludge and plastics. © 2023, The Authors. All rights reserved.

关键词： Polypropylenes

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Enhanced Hpi Removal Ability of Al13 in the Presence of Organic Matters Under Modified Mwcnts’ Assistance

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SSRN 2023年

作者： Qu, Shanshan Zhang, Jin Xiang, Yu Luo, Jie Zhang, Yan Wang, Wenbo Xu, Hui College of Environmental Science and Engineering Dalian Maritime University Liaoning Dalian116026 China College of Chemical Sciences University of the Chinese Academy of Sciences Beijing100049 China College of Resource and Environment Hohai University Jiangsu Nanjing210098 China Guangxi Colleges Universities Key Laboratory of Environmental-friendly Materials and New Technology for Carbon Neutralization Guangxi Key Laboratory of Advanced Structural Materials and Carbon Neutralization School of Materials and Environment Guangxi Minzu University Guangxi Nanning530006 China University of Chinese Academy of Sciences Beijing100049 China

DBPs, which formed in the process of chlorination disinfection of water, has a potential threat to human health. To date, NOM is the precursor of DBPs so that it is important to remove the NOM to reduce the generation of DBPs. In the conventional water treatment process, chlorination disinfection is generally after coagulation treatment. Coagulation is a key process to remove the NOM from water. However, the traditional coagulants have poor removal ability for hydrophilic organic matter. In this study, multi walled carbon nanotubes was modified with Mg, Ca and Fe to produce modified multi walled carbon nanotubes and then reacted with Al13 to produce composite coagulant of Al13-MW, Al13-MgMW, Al13-CaMW and Al13-FeMW respectively. Al13 and composited coagulants were utilized to treat water with bovine serum protein to compare the removal efficiency for HPI. The results showed that the composited coagulant had a relatively high removal efficiency for organic matter, and among them, the effect of Al13-MgMW is best. The DOM removal rates of Al13 and Al13-MgMW at doses of 0.12 mmol/L were 64.8% and 75%, respectively. Meanwhile, Al13-MgMW had an 89.2% removal rate for HPI. The XPS and FTIR of flocs showed that the Al13-MgMW had a significant removal ability for O=C substances such as polysaccharides and proteins. MgMW has a larger specific surface area and pore volume. ESI-TOF-MS results showed the composited coagulants retains the original structure of Al13, and thus preserve and improve the advantages of Al13 © 2023, The Authors. All rights reserved.

关键词： Proteins

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Constructing a Dual-Function Bivo4/Nife-Ldh Composite Photoanode for Enhanced Photoelectrocatalytic Wastewater Treatment and Simultaneous Hydrogen Evolution

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SSRN 2022年

作者： Cong, Sumin Yu, Jiuheng Liu, Baojun Teng, Wei Tang, Yubin Department of Environmental and Chemical Engineering Jiangsu University of Science and Technology Zhenjiang212003 China College of Resource and Environmental Engineering Guizhou University Guizhou Karst Environmental Ecosystems Observation and Research Station Key Laboratory of Karst Georesources and Environment Ministry of Education Guiyang550025 China

BiVO4/NiFe photoelectric electrode was synthesized on Ni foam by simple hydrothermal method and successive ion layer absorption and reaction (SILAR) method. The BiVO4/NiFe electrode was used as photoanode for photoelectrocatalytic (PEC) degradation of pollutants in wastewater with simultaneous cathodic hydrogen production. The photoelectrochemical and catalytic properties of the prepared electrodes were studied by a series of characterization and measurements. The unique Z-scheme BiVO4/NiFe heterojunction has synergistic effect, which can significantly improve the absorption of visible light, accelerate the charge transfer and consequently inhibit the complexation of e-h+ pairs. These characteristics of the heterojunction contribute to the prominent PEC performance of the BiVO4/NiFe electrode. The trapping experiment showed that holes (h+) are the main active substances in the degradation process, and the electrode has good cyclic stability that the degradation efficiency had not decayed significantly after five repeated experiments. In addition, the PEC process was simulated under the actual sunlight to explore the practical application value of the BiVO4/NiFe electrode. The results indicate that the BiVO4/NiFe photoanode displayed favorable degradation and hydrogen evolution efficiency in the real sun light condition. This study provides a basis for the design of highly practical photoelectric electrode and expands the application of PEC technology. © 2022, The Authors. All rights reserved.

关键词： Degradation

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Nanoconfinement Boosts Affinity of Hydrated Zirconium Oxides to Arsenate: Surface Complexation Modeling Study

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SSRN 2023年

作者： Shen, Pengfei Pan, Siyuan Huang, Xianfeng Zhang, Xiaolin State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing210023 China Nanjing University Nanjing210023 China National and Local Joint Engineering Research Center for Ecological Treatment Technology of Urban Water Pollution School of Life and Environmental Science Wenzhou University Wenzhou325035 China

Nanoscale hydrated zirconium oxide (HZO) holds great potential in groundwater purification due to its ability to form inner-sphere coordination with arsenate. Despite being frequently encapsulated in bulky hosts for practical applications in water treatment, the adsorption mechanism of arsenate onto HZO remains scantily explored, especially for in-situ and quantitative analysis of nanoconfinement effects on the surface chemistry of HZO at real solid-liquid interfaces. In this study, we investigated the Zr-As coordination configuration and corresponding intrinsic coordination constants (Kintr) values using surface complexation modeling (SCM), and distinguished the nanoconfinement effects by comparing bare HZO with the HZO nanoparticles (NPs) encapsulated inside the strongly basic anion exchanger D201. Potentiometric titration suggests that the protonated form (≡ZrOH2+) is the dominant surface Zr species, and D201 enhances the protonation degree by reducing electrostatic repulsion to H+. Batch adsorption experiments demonstrate that the nanocomposite (HZO@D201) has a higher adsorption capacity in a wide range of pH (3-10) and ionic strength (0.001-0.1 M NaNO3) than bare HZO. SCM simulations reveal that the coordination configuration of diprotonated monodentate mononuclear (MM-H2) dominates at pH 3-6, while deprotonated bidentate binuclear (BB-H0) dominates at pH>7. For each configuration, the intrinsic coordination constants (Kintr) of HZO@D201 (10−0.66 and 10−16.10, respectively) are significantly higher than those of bare HZO (10−12.24 and 10−44.42, respectively), indicating a superior chemical bonding affinity caused by nanoconfinement. The obtained Kintr values are used to predict arsenate adsorption isotherms in pH 3 and 9, and the results align with the SCM simulation outcomes. © 2023, The Authors. All rights reserved.

关键词： Nanocomposites

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The Characteristics and Potential Risks of Neonicotinoid Residues in Soils of Different Types of Land Use in Hangzhou

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SSRN 2022年

作者： Ying, Zeteng Guo, Bin Zhang, Guomei Sun, Lihua Yang, Xifan Zhang, Quan Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province College of Environment Zhejiang University of Technology Zhejiang Hangzhou310032 China Institute of Environment Resource Soil and Fertilizer Zhejiang Academy of Agricultural Sciences Zhejiang Hangzhou310021 China College of Food Science and Engineering Hangzhou Medical College Zhejiang Hangzhou310013 China

Due to the wide existence of neonicotinoid insecticides (neonics) and their potential impact on ecosystems and human health, they have received special attention in recent years. Soil is not only a sink of neonics but also a source of neonics, so it plays a key role in the ubiquity of neonics in the environment. The purpose of this research was to compare neonics residues in soils of different types of land use and estimate their exposure to different populations via ingestion. A total of 130 soil samples from six different types were collected. The results showed that at least one neonic was analyzed in all samples. The highest average concentration was 3.42 ng/g (clothianidin), followed by 3.39 ng/g (thiamethoxam), 3.06 ng/g (acetamiprid), 2.84 ng/g (imidacloprid), 2.66 ng/g (nitenpyram), 2.43 ng/g (thiacloprid), and 1.89 ng/g (dinotefuran). IMI and ACE were the most commonly found neonics in soil. The neonic levels in different soils varied significantly. The integrated neonic residue in cropland was much higher than that in other types of land. The risk assessment revealed that the average daily dose (ADD) through ingestion contact with soil was acceptable to children and adults. With the increasing evidence that neonics could cause a variety of toxic effects on mammals and humans, ingestion exposure caused by neonics in soil should also receive continuous attention in future studies. © 2022, The Authors. All rights reserved.

关键词： Soils

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Human activities aggravate nitrogen-deposition pollution to inland water over China

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National science Review 2020年第2期7卷 430-440页

作者： Yang Gao Feng Zhou Philippe Ciais Chiyuan Miao Tao Yang Yanlong Jia Xudong Zhou Butterbach-Bahl Klaus Tiantian Yang Guirui Yu Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and Limnology Chinese Academy of Sciences Sino-French Institute for Earth System Science College of Urban and Environmental Sciences Peking University Laboratoire des Sciences du Climat et de l'Environnement CEA CNRS UVSQ State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal University State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Center for Global Change and Water Cycle Hohai University Institute for Meteorology and Climate Research Atmospheric Environmental Research Karlsruhe Institute of Technology Department of Civil and Environmental Engineering University of California

In the past three decades, China has built more than 87 000 dams with a storage capacity of ≈6560 km3and the total surface area of inland water has increased by 6672 km2. Leaching of N from fertilized soils to rivers is the main source of N pollution in China, but the exposure of a growing inland water area to direct atmospheric N deposition and N leaching caused by N deposition on the terrestrial ecosystem, together with increased N deposition and decreased N flow, also tends to raise N concentrations in most inland waters. The contribution of this previously ignored source of N deposition to freshwaters is estimated in this study, as well as mitigation strategies. The results show that the annual amounts of N depositions ranged from 4.9 to 16.6 kg · ha-1· yr-1in the 1990 s to exceeding 20 kg · ha-1· yr-1in the 2010 s over most of regions in China, so the total mass of N(the net contribution of N deposition to the increase in N concentration) for lakes, rivers and reservoirs change from 122.26 Gg N · yr-1in the 1990 s to 237.75 Gg N· yr-1in the 2010 s. It is suggested that reducing the N deposition from various sources, shortening the water-retention time in dams and decreasing the degree of regulation for rivers are three main measures for preventing a continuous increase in the N-deposition pollution to inland water in China.

关键词： N deposition N concentration dam water area human activity

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Nanoconfined Hydrated Zirconium Oxides for Improved Adsorption of Arsenate: Surface Complexation Modeling Study

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SSRN 2023年

Nanoscale hydrated zirconium oxide (HZO) holds great potential in groundwater purification due to its ability to form inner-sphere coordination with arsenate. Despite being frequently encapsulated inside bulky hosts, the adsorption mechanism of arsenate onto HZO, including the intrinsic coordination constants (Kintr) and the effects of nanoconfinement, remains scantily explored. In this study, we investigated the Zr-As coordination configuration and corresponding Kintr values using surface complexation modeling (SCM), and distinguished the nanoconfinement effects by comparing bare HZO with the HZO nanoparticles (NPs) encapsulated inside the strongly basic anion exchanger D201. Both samples share a similar crystalline amorphous structure and surface site density (~6 mmol/g-Zr). Potentiometric titration suggests that the protonated form (≡ZrOH2+) is the dominant surface Zr species, and D201 enhances the protonation degree by reducing electrostatic repulsion to H+. Batch adsorption experiments demonstrate that the nanocomposite (HZO@D201) has a higher adsorption capacity in a wide range of pH (3-10) and ionic strength (0.001-0.1 M NaNO3) than bare HZO. SCM simulations reveal that the coordination configuration of diprotonated monodentate mononuclear (MM-H2) dominates at pH 3-6, while deprotonated bidentate binuclear (BB-H0) dominates at pH>7. For each configuration, the Kintr values of HZO@D201 (10−0.66 and 10−16.10, respectively) are significantly higher than those of bare HZO (10−12.24 and 10−44.42, respectively), indicating a superior chemical bonding affinity caused by nanoconfinement. The obtained Kintr values are used to predict arsenate adsorption isotherms in pH 3 and 9, and the results align with the SCM simulation outcomes, verifying their reliability. © 2023, The Authors. All rights reserved.

关键词： Groundwater

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All-Optical Non-Resonant Photoacoustic Spectroscopy for Multicomponent Gas Detection Based on Aseismic Photoacoustic Cell

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SSRN 2023年

作者： Fu, Lujun Lu, Ping Pan, Yufeng Zhong, Yi Sima, Chaotan Wu, Qiang Zhang, Jiangshan Cui, Lingzhi Liu, Deming National Engineering Research Center for Next Generation Internet Access System School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan430074 China Shenzhen Huazhong University of Science and Technology Research Institute Shenzhen518000 China Wuhan OV Optical Networking Technology Co. Ltd. Wuhan430073 China Faculty of Engineering and Environment Northumbria University Newcastle upon TyneNE1 8ST United Kingdom Department of Electronics and Information Engineering Huazhong University of Science and Technology Wuhan430074 China State Key Laboratory of NBC Protection for Civilian Beijing102205 China

An all-optical non-resonant photoacoustic spectroscopy system for multicomponent gas detection based on a silicon cantilever optical microphone (SCOM) and an aseismic photoacoustic cell is proposed and demonstrated. The SCOM has a high sensitivity of over 96.25 rad/Pa with sensitivity fluctuation less than ±1.56 dB between 5 Hz to 250 Hz. Besides, the minimal detectable pressure (MDP) of the sensor is 0.55 μPa·Hz-1/2 at 200 Hz, which indicates that the fabricated sensor has high sensitivity and low noise level. Six different gases of CO2, CO, CH4, C2H6, C2H4, C2H2 are detected at the frequency of 10 Hz, whose detection limits (1σ) are 20.89 ppb, 309.70 ppb, 498.32 ppb, 70.98 ppb, 384.45 ppb and 139.20 ppb, respectively. The system achieves high sensitivity and low detection limits for trace gas detection. In addition, the system exhibits seismic performance with suppressing vibration noise by 4.5 times, and achieves long-term stable operation. © 2023, The Authors. All rights reserved.

关键词： Photoacoustic spectroscopy

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The Lead Removal Evolution from Hazardous Waste Cathode Ray Tube Funnel Glass Under Enhancement Of Red Mud (Rm) Melting And Synthesizing Value-Added Glass-Ceramics Via Reutilization Of Silicate Resources

SSRN

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SSRN 2022年

作者： Wang, Fengkang Xu, Baoqiang Yang, Bin Shi, Tengteng State Key Laboratory of Complex Nonferrous Metal Resources Clear Utilization Kunming650093 China National Engineering Laboratory for Vacuum Metallurgy Kunming650093 China Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming650093 China School of Metallurgy and Environment Central South University Changsha China

Waste CRT funnel glass (FG) is a typical hazardous waste in electron industry, red mud (RM) is the first waste of alumina production process, they are both resources and hazardous wastes that are extremely difficult to reuse. The technology based on harmless control of FG waste, that RM enhanced removal of Pb from FG via vacuum thermal process and the residual glass removed is utilized as glass-ceramics. The results showed that RM can enhance lead removal from waste CRT funnel glass by the vacuum thermal process. The condition is 1573 K for 80min, only 94.57% Pb is removed for no RM addition, the removal rate of lead reached 98.54% with 30% red mud. A significant mechanismof enhancing delead is investigated by a Fourier transform infrared (FTIR) spectrometer and X-ray photoelectron spectroscopy (XPS), that -Pb-O-Si-O- network structure is broke by the free calcium ions from red mud. Afterward, the valuable glass-ceramics with Tetragonal-KAlSi 2 O 6 and Triclinic-CaSiO 3 crystals is synthesized using the residual glass. Overall results indicated that red mud intensifying removal of lead during vacuum thermal process and synthesizing a value-added glass-ceramics via reutilization of silicate resources from waste cathode ray tube (CRT) funnel glass and red mud. © 2022, The Authors. All rights reserved.

关键词： Cathode ray tubes

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