Guoping Wang

Northeast Institute of Geography and Agroecology

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Chuanyu Gao

Northeast Institute of Geography and Agroecology

Jinxin Cong

Chinese Academy of Sciences

Xiaofei Yu

Northeast Normal University

Dongxue Han

Northeast Institute of Geography and Agroecology

Xianguo Lü

Northeast Institute of Geography and Agroecology

Kunshan Bao

South China Normal University

Hanxiang Liu

Zhejiang Normal University

Zhenqing Zhang

Tianjin Normal University

Qianxin Lin

Louisiana State University

Wei Xing

Wuhan Botanical Garden

Cooperative Institutions

Chinese Academy of Sciences

118

University of Chinese Academy of Sciences

Northeast Institute of Geography and Agroecology

Chinese Academy of Agricultural Sciences

Cotton Research Institute

Zhengzhou University

University of Exeter

State Key Laboratory of Cotton Biology

Jilin University

University of Leeds

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Determination of the Mode of Occurrence of As, Cr, and Hg in Three Chinese Coal Samples by Sequential Acid Leaching

Energy Sources Part A Recovery Utilization and Environmental Effects (2007)

Bo Wang Wenjun Li Guoping Wang H. Chen B. Li

Abstract Sequential acid leaching was used to leach minerals and the trace elements they contain. One-step leaching uses concentrated nitric acid as solvent, while three-step leaching uses 5M hydrochloric acid, concentrated hydrofluoric acid, and concentrated hydrochloric acid as solvents. The sequential acid leaching by three-and one-step leach was also examined. The results showed that one-step leaching could leach over 80% of arsenic from coal samples, and also could leach mercury to a certain degree. During one-step leaching, little chromium is removed, but it is available to leach by three-step leaching; and during the sequential acid leaching by three- and one-step leaching, almost 98% of ash is leached. The result of acid leaching could also give detailed information on mode of occurrence of As, Cr, and Hg, which could be classified into: silicate association, pyrite association, organic association, and carbonates and sulfates association. Over half of chromium in the three coals is associated with organic matters and the rest is associated with silicates. The mode of occurrence of arsenic and mercury is mainly associated with different mineral matters depending on the coal samples studied. Keywords: acid leachingcoalmineralsmode of occurrencetrace elements Acknowledgments Financial support of this work by Natural Science Foundation of China (No. 90210001) is gratefully acknowledged, and the authors also thank Ms. Dongyan Liu for the ICP-AES analyses. Notes a a By difference.

Nitric acid

Hydrochloric acid

Mercury

Hydrofluoric acid

10.1080/15567030701290884

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Citations (4)

Significance of different n-alkane biomarker distributions in four same-age peat sequences around the edges of a small maar lake in China

The Science of The Total Environment (2022)

Yan Zhang Chuanyu Gao Shaoqing Zhang Ping Yang Philip A. Meyers

Maar

Deposition

10.1016/j.scitotenv.2022.154137

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Citations (2)

Dynamic behaviour of YAG transparent ceramic under ramp wave and shock compression loading up to 20 GPa

Shock Waves (2023)

Kuo Bao Xianfeng Zhang Guoping Wang Jiajun Deng Tao Chong

Dynamic range compression

Transparent ceramics

10.1007/s00193-023-01152-3

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Assessing Spatio-Temporal Variability of Soil Phosphorus in Different Cotton-Based Cropping Systems Using Geo-Statistics

Journal of soil science and plant nutrition (2023)

Teng Li Xiong Shiwu Wang Zhanbao Xiaofei Li Yingchun Han

Cropping system

Interception

Soil test

10.1007/s42729-023-01241-3

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Citations (0)

Recent atmospheric metal deposition in peatlands of northeast China: A review

The Science of The Total Environment (2018)

Steve Pratte Kunshan Bao Ji Shen Lydia Mackenzie Anna‐Marie Klamt

Ombrotrophic

Deposition

10.1016/j.scitotenv.2018.01.183

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Citations (47)

Characterizing trace and major elemental distribution in late Holocene in Sanjiang Plain, Northeast China: Paleoenvironmental implications

Quaternary International (2014)

Chuanyu Gao Kunshan Bao Qianxin Lin Haiyang Zhao Zhenqing Zhang

Trace element

Sanjiang Plain

10.1016/j.quaint.2014.01.022

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Citations (20)

Field Simulation the Effects of Global Warming on the Freeze-Thaw Process of the Freshwater Marsh in the Sanjiang Plain, Northeast China

Xiaofei Yu Guoping Wang

The freeze-thaw process in the marsh of the Sanjiang Plain, Northeast China was observed. The effects of the simulated global warming on the ice and snow thaw process and the influences of land-use/cover change on the freeze-thaw process of the freshwater mash soils were investigated. The effects of the water depth on the thaw of the soils beneath the water was also studied. In order to simulate global warming effects, ice and snow were covered by plastic films. The ice thaw process observation showed that the thickness of ice covered by film (FC) decreased by 35.29% more than that of the uncovered (UC). The surface snow temperature difference between FC and UC was not significant (t = 0.836, p = 0.408). The relationship between the temperature of a thawed soil layer (T) and the distance from the layer to the frozen borderline (D) follows the trend of the Logistic model (D = 6.30 - 4.57/1 + (T/10.59) ^18.45 , R ² = 0.95) which can indicate that land-use/cover change has great effects on the freeze-thaw process in wetland. The results indicate that the global warming assumed in the future would seriously influence the freeze-thaw process of the freshwater mash and land-use/cover change have been greatly influencing the process, as well. On here, we only reported the first year's results and the field simulation will be still going on.

Sanjiang Plain

10.1109/icbbe.2008.594

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Citations (1)

Considering the Adaptive Cycle and Resilience of the Ecosystem to Define Reference Conditions for Wetland Restoration

Earth s Future (2022)

Hanxiang Liu Chuanyu Gao Guoping Wang

Abstract Ecosystem resilience to pressures expanding and contracting within the adaptive cycle as slow variables change. However, little is known about their role in defining reference conditions for wetland restoration. Here, we applied paleoecological data of two wetlands that have been degraded (Honghe, riparian peatland) and disappeared (Shenjiadian, valley peatland) to evaluate ecosystem resilience to anthropogenic pressures as the phases of the adaptive cycle progress. The slow variables of plants and diatoms gradually began to change from moisture to dry loving species under severe disturbances in the late 1970s. Then regime shift took place around 1990 CE (Current Era) based on a sequential T‐test analysis and F statistics on the slow variables. A drop in water level caused by human activities rather than climate moisture led to regime shifts in Honghe and Shenjiadian wetlands. Therefore, the ecosystem were in the conservation phase before the late 1970s, and were in the reorganization phase after 1990 CE. The ecosystems had high resilience and a stable state at the early conservation phase, and its characteristics can be used as reference conditions for wetland restoration. The reference water level was 11–13 cm and the NH 4 ‐N ranged from 0.8 to 1.2 mg/L. The dominant vegetation was Drepanocladus aduncus and the dominant diatom was Pinnularia brevicostata . The referred enrich factors of nitrogen, phosphorus, and heavy metals were under 4.45, 2.12, and 1.11, respectively. Considering both adaptive cycle and resilience to define reference conditions can provide insight into the future restoration and management of wetland ecosystems worldwide.

Regime shift

Resilience

10.1029/2021ef002419

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Citations (5)

Biogenic nitric oxide emission from saline sodic soils in a semiarid region, northeastern China: A laboratory study

Journal of Geophysical Research Atmospheres (2008)

Junbao Yu F. X. Meixner Weidong Sun Zhengwei Liang Chen Yuan

It is well‐known that nitric oxide (NO) is an important component in nitrogen biogeochemical cycling produced through biological process of nitrification and denitrification in soils, but the production and the consumption processes of NO in sodic saline soil are less understood. Through a series of laboratory experiments focusing on NO biogenic emissions from four kinds of saline sodic soils of different land use in western Songnen Plain northestern China, we found that the optimum soil moisture for the maximum NO production and emission were 14.0%, 9.0%, 9.5%, and 18% water‐filled pore space (WFPS) for soil samples from natural pasture, man‐made pasture, paddy field of saline sodic soil mixed sandy soil, and paddy field of pure saline sodic soil, respectively. For a given moisture, NO fluxes increased exponentially with soil temperature at any given soil moisture. The optimum soil moisture for the maximum NO emission for a certain soil type, however, was constant and independent of soil temperature. The NO consumption processes for different land uses were similar in all studied saline sodic soils since the difference of NO consumption rate constant in these soils was small (ranged from 1.07 × 10 −6 to 7.45 × 10 −6 m 3 kg −1 s −1 ). The NO emission potential for paddy field soils was about 1.2–2‐fold higher than pasture soils. On the basis of laboratory results and field monitoring data of soil water content and soil temperature, the average NO fluxes from these saline sodic soils in the region were estimated to be 1.3–4.9 ng m −2 s −1 for an entire plant growth period. NO fluxes for pastures mainly occurred in the dry season and were about threefold higher than that for paddy fields, which was strongly influenced by field management.

Sodic soil

10.1029/2007jg000576

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Citations (24)

Response of soil constituents to freeze–thaw cycles in wetland soil solution

Soil Biology and Biochemistry (2011)

Xiaofei Yu Yuanchun Zou Ming Jiang Xianguo Lü Guoping Wang

Carex

Cycling

Soil carbon

Soil horizon

10.1016/j.soilbio.2011.03.002

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Citations (67)