Huan jing ke xue= Huanjing kexue最新文献

{"title":"[Advances and Prospect of Sampling Techniques and Analytical Methods for Trace Elements in the Ocean: Progress of Trace Element Platform Construction in Xiamen University].","authors":"Yong-Ming Huang,&nbsp;Kuan-Bo Zhou,&nbsp;Yao-Jin Chen,&nbsp;Nan Zhang,&nbsp;Jun-Bo Yang,&nbsp;Min-Han Dai,&nbsp;Zhi-Mian Cao,&nbsp;Yi-Hua Cai","doi":"10.13227/j.hjkx.202206071","DOIUrl":"https://doi.org/10.13227/j.hjkx.202206071","url":null,"abstract":"<p><p>Trace elements, which are important chemical components in the ocean, generally refer to those chemical elements with concentrations below 10 μmol·kg^-1in seawater. Some trace elements, such as Fe and Zn, serve as essential micronutrients for marine organisms, which regulate marine primary productivity and are closely related to the biogeochemical cycle of carbon and nitrogen and therefore affect the global environment and climate change. In contrast, some elements, such as Pb, are anthropogenic pollutants largely released by human activities. In addition, some trace elements and their isotopes can be used as tracers for oceanographic processes and proxies for paleoceanography. However, the high saline matrix and extremely low trace element concentrations in seawater, as well as the contamination from research vessels, sampling equipment, and the surrounding environment during the process of sample collection, pretreatment, and analysis, have restricted researchers from obtaining reliable trace element data in the ocean for a long period of time. Nevertheless, high quality samples and accurate data are prerequisites for investigating the biogeochemical and environmental behavior of marine trace elements. This paper reviews the development of sampling techniques and analytical methods for trace elements in seawater, introduces the research history and platform construction activities in Xiamen University in this field, summarizes the advantages and disadvantages of various sampling and analytical techniques and methods, and presents the perspectives on future developments in the research on trace elements in the ocean.</p>","PeriodicalId":172067,"journal":{"name":"Huan jing ke xue= Huanjing kexue","volume":"43 11","pages":"4858-4868"},"PeriodicalIF":0.0,"publicationDate":"2022-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40707848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Biodegradation of Polyethylene Microplastic: A Review].","authors":"Yuan-Rong Luo,&nbsp;Yi-Qian Qian,&nbsp;Ya-Nan Qi","doi":"10.13227/j.hjkx.202206017","DOIUrl":"https://doi.org/10.13227/j.hjkx.202206017","url":null,"abstract":"<p><p>Over the recent decades, global plastic production has grown dramatically due to the huge demands of consumption. As a consequence, large amounts of plastic waste have accumulated in the environment and will be cleaved into microplastics. Due to the low bioavailability, the microplastics will exist in the environment persistently and cause massive environmental stress. Plastic pollution is currently one of the biggest environmental concerns. Recent studies have shown the possibility to obtain degrading microorganisms of microplastics from the natural environment. Some microorganisms can break down microplastics into water and carbon dioxide. This paper reviewed the current research on biodegradation of polyethylene (PE), which is the most abundant microplastic type in the environment, and discussed the quantification methods of the degradation effect. Given that current biodegradation efficiency is relatively limited, further research is required.</p>","PeriodicalId":172067,"journal":{"name":"Huan jing ke xue= Huanjing kexue","volume":"43 11","pages":"4869-4875"},"PeriodicalIF":0.0,"publicationDate":"2022-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40707849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Environmental Process, Effects and Risks of Emerging Contaminants in the Estuary-Coastal Environment].","authors":"Xin-Hong Wang,&nbsp;Xiao-Xuan Yu,&nbsp;Si-Quan Wang,&nbsp;Xiao-Han Yin,&nbsp;Wei-Xu Qian,&nbsp;Xiao-Ping Lin,&nbsp;Yue Wu,&nbsp;Chang Liu","doi":"10.13227/j.hjkx.202205354","DOIUrl":"https://doi.org/10.13227/j.hjkx.202205354","url":null,"abstract":"<p><p>Human activities and global climate change have contributed substantially to the input of land-sourced pollutants into the aquatic environment, especially for emerging or newly identified contaminants, such as microplastics, emerging persistent organic pollutants, pharmaceuticals, and personal care products. The prevalence and toxicity of these emerging pollutants has raised continued concern for the health and safety of the public worldwide. A review of sources, distribution, interfacial transport processes of microplastics, per-and polyfluorinated compounds, antibiotics, and endocrine-disrupting chemicals and factors that influence their environmental behavior in the estuary-coastal environment have been included. The adverse ecological effects and health risks of these emerging contaminants to humans were also reviewed. Lastly, the direction of future research was provided regarding the environmental behavior of multiple emerging pollutants in the coastal environment and the health risks resulting from their interactions, supporting the prevention and control of marine pollution and the healthy development of the marine economy.</p>","PeriodicalId":172067,"journal":{"name":"Huan jing ke xue= Huanjing kexue","volume":"43 11","pages":"4810-4821"},"PeriodicalIF":0.0,"publicationDate":"2022-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40707901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Difference in PM_2.5 Pollution and Transport Characteristics Between Urban and Suburban Areas].","authors":"Peng Qi,&nbsp;Ying Zhou,&nbsp;Shui-Yuan Cheng,&nbsp;Wei-Chao Bai","doi":"10.13227/j.hjkx.202201227","DOIUrl":"https://doi.org/10.13227/j.hjkx.202201227","url":null,"abstract":"<p><p>Based on multi-source observation data, such as lidar ceilometer, aircraft AMDAR, and conventional sites, combined with numerical simulation (CAMx-PSAT), this study took the typical cities of the Beijing-Tianjin-Hebei region-Beijing (BJ) urban area and suburbs (Miyun) and Shijiazhuang (SJZ) urban area and suburbs (Pingshan) as the case study areas. The differences in boundary layer height between urban areas and suburbs (ΔPBLH), surface PM_2.5 mass concentration (ΔSurf_PM_2.5), vertical PM_2.5 mass concentration (ΔVert_PM_2.5), and transmission flux intensity and height distribution characteristics were analyzed. The results showed:due to factors such as anthropogenic heat sources, short-wave radiation, and thermal turbulence, the annual average planetary boundary layer height in urban areas was 8%-29% higher than that in the suburbs, and in different seasons, the monthly average planetary boundary layer height in urban areas was 2% (April in SJZ)-47% (July in BJ) higher than that in the suburbs. Due to the combined effects of anthropogenic emissions, inversions, and atmospheric turbulence, the annual average<i>ρ</i>(PM_2.5) in urban areas between 0-1260 m was higher than that in suburbs by 0.1 (SJZ)-29.7 (BJ) μg·m^-3 and decreased with the increase in height. The annual average total net flux intensity in urban areas was much greater than that in suburbs, with outflows in urban areas and inflows in suburbs; due to the urban low pressure and the suburban high pressure, suburban thermal circulation was formed. The annual average total net flux intensity in BJ (44.77 t·d^-1) was greater than that in SJZ (34.44 t·d^-1). Affected by wind speed and PM_2.5 mass concentration, between 0-1260 m, the fluxes in urban areas and suburbs and surrounding areas showed an obvious trend of increasing net flux intensity with the increase in height above the ground. Furthermore, the transmission exchange between urban areas and suburbs and surrounding areas in January and April had the most obvious impact on the environment. The intensity of the maximum net flux in the lower urban areas and the suburbs in different seasons was significantly different, and the difference between the two was 2.23-4.48 times; however, the height characteristic difference in the intensity of the maximum net flux was small, mainly located at 611-1260 m.</p>","PeriodicalId":172067,"journal":{"name":"Huan jing ke xue= Huanjing kexue","volume":"43 11","pages":"5018-5029"},"PeriodicalIF":0.0,"publicationDate":"2022-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40722527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Effects of Land-use Conversion on Soil Nitrification and NO & N₂O Emissions in Tropical China Under Different Moisture Conditions].","authors":"Rui-Jie Tang,&nbsp;Yu-Jie Hu,&nbsp;Cai-Yue Zhao,&nbsp;Yan Zhao,&nbsp;Xin-Sheng Yuan,&nbsp;Shui-Rong Tang,&nbsp;Yan-Zheng Wu,&nbsp;Lei Meng","doi":"10.13227/j.hjkx.202112302","DOIUrl":"https://doi.org/10.13227/j.hjkx.202112302","url":null,"abstract":"<p><p>Rain and heat conditions are abundant in tropical areas, and rubber and tea are widely planted in this region; the nitrification process produces nitrate content, which is not conducive to the maintenance of nitrogen nutrients, and has negative environmental effects (nitrogen oxide emissions). The characteristics of soil nitrification rate and nitrogen oxide emission under different land use patterns remain unclear. An incubation experiment was conducted under the 5 a (T5) and 15 a (T15) tea plantation soils and the nearby typical rubber plantation (XJ) soils in Baisha county of Hainan province under two moisture contents (50% WFPS-L and 80% WFPS-H) for 71 d at 25℃. The results showed that:① after the rubber plantation was converted to a tea plantation, the net nitrification and soil NO and N₂O emissions were significantly reduced under high moisture content. The overall trend was in the order of XJH>T15H>T5H, and the values of soil net nitrification and NO and N₂O emissions were as high as 4.2 mg·(kg·d)^-1, 1.4 mg·kg^-1, and 14.3 mg·kg^-1 in the XJH treatment, respectively. Under the low moisture content, soil NO emissions in tea field soil were significantly reduced relative to those in rubber plantation soil, N₂O emissions had no significant difference among different treatments, and net nitrification had no significant difference between the XJ and T15 treatments. There was a significant positive correlation between NO emissions and net nitrification rate (<i>P</i><0.01). ② The net nitrification of XJH was higher than that of XJL, but the net nitrification values under different moisture contents in tea field soil was in contrast to that in rubber plantation soil. The NO emissions of XJ and T15 under different moisture contents were consistent with the trend of net nitrification, and the high nitrification promoted NO emissions, whereas NO emissions of T5 were not significantly affected by moisture content. The high moisture content treatment significantly promoted N₂O emissions relative to those under the low moisture content treatment. The results showed that SOM, TN, pH, and moisture content were the key factors affecting soil net nitrification rate, NO, and N₂O emissions. The conversion of the rubber plantation to a tea plantation significantly reduced the net nitrification rate and negative impact on the environment under high moisture content.</p>","PeriodicalId":172067,"journal":{"name":"Huan jing ke xue= Huanjing kexue","volume":"43 11","pages":"5159-5168"},"PeriodicalIF":0.0,"publicationDate":"2022-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40486197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Mercury Speciation, Distribution, and Potential Sources in Surface Waters of the Yangtze and Yellow River Source Basins of Tibetan Plateau During Wet Season].","authors":"Nan-Tao Liu,&nbsp;Fei Wu,&nbsp;Wei Yuan,&nbsp;Xun Wang,&nbsp;Ding-Yong Wang","doi":"10.13227/j.hjkx.202201143","DOIUrl":"https://doi.org/10.13227/j.hjkx.202201143","url":null,"abstract":"<p><p>To understand the mercury (Hg) biogeochemical cycle in alpine regions under global warming, it is critical to identify the distribution and sources of Hg in aquatic ecosystems of the Tibet Plateau. The spatial distribution pattern and potential sources of Hg species including total mercury (THg), particulate mercury (PHg), and dissolved mercury (DHg) were investigated in surface waters of the Yangtze and Yellow River source basins during the wet season. The results showed that average <i>ρ</i>(DHg) in surface water of the Yangtze and Yellow River source basins were comparable[(2.96±1.26) ng·L^-1 and (2.47±0.83) ng·L^-1, respectively], whereas the average <i>ρ</i>(THg)[(10.69±11.14) ng·L^-1] and <i>ρ</i>(PHg)[(8.46±11.41) ng·L^-1] in the source basin of the Yangtze River were significantly higher than that in surface water of the Yellow River source basin[(3.37±2.03) ng·L^-1 and (1.13±1.02) ng·L^-1, respectively]. It is worth noting that the ecological risk of Hg in the study area was limited because of low Hg concentration and methylation level. In addition, the correlation analysis illustrated that the THg was mainly concentrated by PHg in the source basin of the Yangtze River. Specifically, the concentration variations in Hg were mainly affected by the input of glacier meltwater, soil erosion, and precipitation. By contrast, the main species of Hg in the source basin of the Yellow River was DHg, the distribution pattern of which was mainly controlled by DOC. Spatially, a significant negative correlation was found between <i>ρ</i>(PHg) and longitude in the source basin of the Yangtze River (<i>R</i>²=0.46, <i>P</i><0.01). The spatial distribution differences of river slope and soil erosion intensity were identified as the key factors leading to the decreasing trend of <i>ρ</i>(PHg) and <i>ρ</i>(THg) along the river flow in the source basin of the Yangtze River. The results of the PMF model further demonstrated that in the surface waters of the source regions of the Yangtze and Yellow Rivers, 51.4% of Hg derived from long-distance atmospheric deposition, 38.8% from erosion of soil rock or sediment via stream flow, and 9.7% from soil runoff or seepage input.</p>","PeriodicalId":172067,"journal":{"name":"Huan jing ke xue= Huanjing kexue","volume":"43 11","pages":"5064-5072"},"PeriodicalIF":0.0,"publicationDate":"2022-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40496980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Carbon Dioxide Mitigation Co-effect Analysis of Structural Adjustment Measures in the \"2+26\" Cities in the Jing-Jin-Ji Region and Its Surroundings].","authors":"Tian-Qi Yang,&nbsp;Hong-Chang Wang,&nbsp;Chen Zhang,&nbsp;Jin-Wei Zhu,&nbsp;Yu-Tao Cui,&nbsp;Yu-Ling Tan,&nbsp;Yun Shu","doi":"10.13227/j.hjkx.202111234","DOIUrl":"https://doi.org/10.13227/j.hjkx.202111234","url":null,"abstract":"<p><p>The Three-Year Action Plan for Winning the Blue Sky Defense Battle states that structural adjustments of industrial, energy, transportation, and land use are important to significantly reduce CO₂ and air pollutant emissions. This co-effect is evident but has not been quantified at the city-cluster level. This study developed an emission inventory for the \"2+26\" cities of the Jing-Jin-Ji region and its surroundings and quantitatively analyzed the impacts of measures in the Three-Year Action Plan for Winning the Blue Sky Defense Battle on the emissions of CO₂ and major air pollutants using Greenhouse Gas and Air Pollution Interactions and Synergies in the \"2+26\" cities model (GAINS-JJJ). The results showed that in the \"2+26\" cities, the emission reductions in CO₂, primary PM_2.5, SO₂, NO_<i>x</i>, and NH₃ under policy scenario 2020 were 29.1 Mt (equivalent to 2% of the emissions in 2017), 203.8 (21%), 281.8 (27%), 485.5 (17%), and 34.3 kt (3%), respectively, relative to 2017. In terms of the cities or sectors, the higher the pollutant emissions, the higher the reduction achieved. The CO₂ mitigation co-effect results showed that industrial adjustment measures, such as eliminating backward production capacity, upgrades on industrial boilers, and phasing out small and polluting factories, contributed the most to the co-effect of CO₂ emission reduction, whereas NO_<i>x</i> presented the highest co-effects, with CO₂ among the different air pollutants.</p>","PeriodicalId":172067,"journal":{"name":"Huan jing ke xue= Huanjing kexue","volume":"43 11","pages":"5315-5325"},"PeriodicalIF":0.0,"publicationDate":"2022-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40512796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Adsorption of Phosphate and Heavy Metals by Lanthanum Modified Zeolite and Its Performance in Sediment Inactivation].","authors":"Zhe Wang,&nbsp;Jun Zhu,&nbsp;Wen Li,&nbsp;De-Xin Yan,&nbsp;Wen Dong,&nbsp;Yu-Ling Liu,&nbsp;Jia-Ke Li","doi":"10.13227/j.hjkx.202202022","DOIUrl":"https://doi.org/10.13227/j.hjkx.202202022","url":null,"abstract":"<p><p>Due to the large scale of mining and smelting activities, considerable amounts of heavy metals are discharged into the environment and accumulate in the sediment of rivers and lakes. The combined pollution of heavy metals and the intrinsic phosphorus in sediment calls for novel remediation technologies. In this study, lanthanum-modified zeolite (LMZ) was employed as an inactivation agent for the immobilization of phosphorus, zinc, and lead in sediments. The adsorption capacities as well as the inactivation performance of LMZ for P, Zn, and Pb were investigated, and the adsorption mechanisms were explored via desorption experiments, X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). The results indicated that the adsorption maximums of LMZ for P, Zn, and Pb were 53.76, 27.70, and 123.45 mg·g^-1, respectively. Pre-adsorption of Zn and Pb had a negligible effect on the P adsorption by LMZ, whereas the adsorption of Zn and Pb were inhibited significantly by the pre-adsorption. P, Zn, and Pb in the sediment were transformed to more stable or less bioavailable forms by dosing 0.83% and 1.66% weight percentages of LMZ. It was found that P, Zn, and Pb were adsorbed through the formation of inner-sphere complexes. Further, desorption experiments and XRD patterns suggested that electrostatic attraction and surface precipitation also contributed to the adsorption of Zn and Pb, respectively.</p>","PeriodicalId":172067,"journal":{"name":"Huan jing ke xue= Huanjing kexue","volume":"43 11","pages":"5106-5114"},"PeriodicalIF":0.0,"publicationDate":"2022-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40485755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Pollution Characteristics and Ecological Risk Assessment of Antibiotics in Vegetable Field in Kaizhou, Chongqing].","authors":"Lin-Fa Fang,&nbsp;Ping-Ping Ye,&nbsp;Biao Fang,&nbsp;Xiao-Xia Fan,&nbsp;Kun-Peng Gao,&nbsp;Shi-Yang Li,&nbsp;Xin-Ping Chen,&nbsp;Ran Xiao","doi":"10.13227/j.hjkx.202201221","DOIUrl":"https://doi.org/10.13227/j.hjkx.202201221","url":null,"abstract":"<p><p>The accumulation of antibiotics in farmland and its ecological risk have become a research hotspot at home and abroad. The objective of this study was to investigate the occurrence and accumulation of antibiotics and their potential environmental and ecological risks in vegetable fields in Kaizhou district of Chongqing country. The occurrence characteristics of antibiotics including tetracyclines, sulfonamides, quinolones, macrolides, and chloramphenicols were detected using experimental analysis. The results showed that there was an accumulation of antibiotics in the vegetable soil, and 18 antibiotics in five categories were detected (0-42.88 μg·kg^-1), mainly for tetracyclines and quinolones. The detection rate of quinolone antibiotics was the highest (15.38%-100%), especially for norfloxacin and ofloxacin (100%), whereas the tetracyclines presented the highest concentration (0-42.88 μg·kg^-1). The amount of total antibiotics in the vegetable soil was 1.64-233.11 μg·kg^-1, whereas different vegetable soils showed the following trend:water spinach soil (89.73 μg·kg^-1)>cabbage soil (32.53 μg·kg^-1)>pepper soil (32.16 μg·kg^-1)>tomato soil (32.13 μg·kg^-1)>cucumber soil (26.46 μg·kg^-1)>grassland (7.32 μg·kg^-1). The correlation results showed that there was a significantly positive correlation between total antibiotic residues and organic fertilizer application (<i>P</i><0.05) but a significantly negative correlation with soil pH (<i>P</i><0.05). Quinolones and sulfonamides were negatively correlated with soil water content (<i>P</i><0.05), whereas quinolones positively correlated with soil available phosphorus and organic matter content (<i>P</i><0.05). The potential eco-environmental risk assessment results showed that tetracyclines and quinolones in vegetable soil in Kaizhou district had certain ecological risks, of which 62%-92% and 62%-100% of soil samples with quinolones had potential toxicity to soil animals and microorganisms.</p>","PeriodicalId":172067,"journal":{"name":"Huan jing ke xue= Huanjing kexue","volume":"43 11","pages":"5244-5252"},"PeriodicalIF":0.0,"publicationDate":"2022-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40487597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Estimating Methane Fugitive Emissions from Oil and Natural Gas Systems in China].","authors":"Chun-Ci Chen,&nbsp;Yong-Long Lü,&nbsp;Gui-Zhen He","doi":"10.13227/j.hjkx.202204176","DOIUrl":"https://doi.org/10.13227/j.hjkx.202204176","url":null,"abstract":"<p><p>To achieve its carbon peaking and carbon neutrality objectives, China is committed to promoting a decarbonized energy transition, which has strengthened the shift from coal to oil and gas resources. As a result, methane (CH₄) fugitive emissions from China's oil and gas systems are of increasing concern. Fugitive emissions include equipment leaks, venting, and flaring and involve exploration, production, transportation, storage, and distribution of oil and gas resources. However, there is no uniform accounting method for methane fugitive emissions from oil and gas systems, and fugitive emissions have not been included in the national greenhouse gas inventory statistics. Using the relevant methods, methane fugitive emissions from China's oil and gas systems were estimated for the period from 1980-2020. The results showed that CH₄ fugitive emissions from oil and gas systems increased rapidly with the growth of production and consumption of oil and gas resources, from less than 0.6 million tons in 1980 to more than 2.6 million tons in 2020. CH₄ fugitive emissions from oil and gas systems reached approximately 0.6 million tons and 2.0 million tons, which were 1.38 and 16.6 times larger than those in 1980, respectively. Fugitive emissions from oil and gas systems originated primarily from gas production, oil production, gas transportation, and storage, accounting for 41%, 20%, 18%, and 13% of total emissions, respectively. Gas pipelines were the main fugitive facilities. The emission intensity of unconventional oil and gas resource exploration was higher compared to conventional resource exploration. This study improved the CH₄ fugitive emission inventory, which could provide solid scientific data for CH₄ reduction.</p>","PeriodicalId":172067,"journal":{"name":"Huan jing ke xue= Huanjing kexue","volume":"43 11","pages":"4905-4913"},"PeriodicalIF":0.0,"publicationDate":"2022-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40707852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}