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| 1 | Characteristics of leaching of heavy metals from low-sulfur coal gangue under different conditions显示文摘Coal gangue is the main pollution source of mining areas.When coal gangue is stacked and recycled,the heavy metal elements contained in it are released by natural weathering and leaching,which causes damage to the surrounding ecological environment.In this study,the leaching and precipitation characteristics of heavy metals in low-sulfur coal gangue under different environmental conditions were simulated by indoor dynamic leaching experiments,which provided a theoretical basis for environmental restoration of the mining area.The conclusions are as follows:higher heavy metal content in low-sulfur coal gangue is associated with greater,leaching of heavy metals;acidic conditions promote the release of heavy metals in low-sulfur coal gangue;and more precipitation is associated with better release of heavy metals from the low-sulfur coal gangue. | Chang Li Liugen Zheng Chunlu Jiang Xing Chen Shuaishuai Ding | 2021 | International Journal of Coal Science & Technology2021，8，4： | 6 |
| 2 | Chemical grout diffusion in porous rock based on response of geoelectric feld显示文摘Porous rock chemical grouting simulation test was conducted using established large scale physical model.Chemical grout diffusing rule in porous media with different permeability was studied by monitoring the spontaneous potential and exciting current response during grouting.The results show that chemical grout spread evenly in all directions and diffusion areas are approximately concentric circles in the cross section of homogeneous transverse isotropic pore medium,the grout spread flling range can be quantitatively decrypted by the diffusion radius.The average diffusion speed and radius increase approximately as the square root with the permeability coeffcient in different permeability media under the same conditions.Calculation results using Maag cylindrical diffusion equation show that the calculated value of diffusion radius is in good agreement with the test value under different grouting pressures and permeability conditions. | Jiang Chunlu Jiang Zhenquan Liu Shengdong Sun Qiang Yang Cai | 2013 | International Journal of Mining Science and Technology2013，23，5： | 1 |
| 3 | Dielectric properties of edible fungi powder related to radio-frequency and microwave drying显示文摘Edible fungi are rich in nutrition,but they are susceptible to spoilage,and often prolonged by drying.RF and microwave energy drying have the advantages of short drying time,high energy efficiency and good process control.However,to develop an effective dielectric drying method,it is important to understand dielectric properties,the major factor characterizing the interaction between the electromagnetic energy and the food.At present,there is a lack of research on dielectric properties of edible fungi.In this study,a vector network analyzer and an open-ended coaxial-line probe were employed to measure the dielectric parameters.The dielectric parameters were observed at different temperatures(25–85°C)for edible fungi powder with moisture content ranging from 5 to 30%wet basis over a frequency range of 1–3000 MHz.The relationship between the dielectric properties and frequency,temperature,and moisture content were obtained via regression analysis.Further,the dielectric penetration depth was calculated,and the effects of frequency,moisture content,and temperature on the penetration depth were also analyzed.The results showed that the dielectric properties of edible fungi powder increased with an increase in moisture content and temperature,while they decreased with increasing frequency.At high moisture content and temperature,the increase in dielectric properties was slightly larger than that at low moisture content and temperature.The dielectric properties changed more evidently at lower radio frequencies than at higher radio frequencies.The penetration depth decreased with an increase in temperature,moisture content,and frequency.It can be concluded that a large penetration depth at radio frequencies below 100 MHz could be used to dry edible fungi on a large scale,whereas microwave energy could be employed for drying edible fungi on a small scale. | Siying Qi Jiping Han Camel Lagnika Ning Jiang Chunlu Qian Chunquan Liu Dajing Li Yang Tao Zhifang Yu Libin Wang Zhongyuan Zhang Chunju Liu Yadong Xiao Min Zhang | 2021 | Food Production, Processing and Nutrition2021，3，1： | 0 |
| 4 | Organ-preserving surgery and classic surgery for pancreatic solid pseudopapillary neoplasms:a multicenter analysis from Central and Western China显示文摘Background:Pancreatic solid pseudopapillary neoplasms(SPNs)are low-grade malignant tumors of the pancreas.Organ-pre-serving surgery is being increasingly performed for these tumors,although there is little evidence to support its use.This retro-spective multicenter study aimed to determine the clinicopathologic characteristics of pancreatic SPNs in Central and Western China and to determine the efficacy of organ-preserving surgery.Methods:The clinicopathologic,treatment and follow-up data of 227 pancreatic SPN patients treated between July 2003 and December 2016 at 5 tertiary care centers were retrospectively reviewed.Results:Among the 227 patients(38 males,189 females;mean age 33.30±12.70 years),only 72(31.7%)had symptoms.The mean tumor size was 55.08±29.56 mm.Adjacent organ/lymphovascular invasion was present in 16(7.1%)patients and distant metastasis in 3(1.3%)patients;no patient had spread to distant lymph nodes.Surgery included organ-preserving surgery in 108(47.6%)patients,classic surgery in 115(50.7%)patients,and palliative surgery in 4(1.8%)patients.Tumor recurrence was seen in 8(3.6%)patients.Cox regression analysis showed positive surgical margin(P<.01)and metastasis(P=.03)to be independent predictors of recurrence.Tumor characteristics were comparable between patients receiving organ-preserving surgery and classic surgery.The risk of recurrence was also similar in both groups(P=.72).Conclusions:Organ-preserving surgery appears to be an effective procedure for the treatment of pancreatic SPNs.Resection surgery should aim for negative surgical margins. | Chunlu Tan Zhiqing Yang Jiang Li Fengming Ji Shanmiao Gou | 2023 | Journal of Pancreatology2023，6，2： | 0 |
| 5 | Transformation of minerals at the boundary of magma-coal contact zone:case study from Wolonghu Coal Mine, Huaibei Coalfield, China显示文摘Mesozoic and Cenozoic magma activity in the Wolong Lake mining area of Huaibei is frequent,and the degree of magma intrusion into coal seams remarkable.On the one hand,magma intrusion affects the utilization of coal resources;on the other hand,the macro and trace elements in coal are redistributed to form new mineral types.This study uses the Wolong Lake magma intrusion coal seam as a research object.The mineral paragenesis for igneous rock,coke,and thermally-altered coal in an igneous intrusion zone is studied using SEM,XRD,and Raman spectroscopy.During igneous intrusion,the temperature and pressure of igneous rock metamorphose ambient low-rank coal to high-rank coal and coke.The response mechanism of minerals and trace elements to magmatic intrusion is discussed.The results are:①SEM analysis shows that ankerite and pyrite are formed from magma intrusion.Both minerals are strongly developed in the magma-coal contact zone,and less well developed in thermally-altered coal.②XRD analysis shows that igneous intrusion strongly influences the types and content of minerals in coke and thermally-altered coal.In addition to the increase amounts of ankerite and pyrite,chlorite,serpentine,and muscovite,and other secondary minerals,are generated following igneous intrusion.③Raman analysis suggests that thermally-altered coal possesses the characteristics of both pyrite and coke.Coke from the magma-coal boundary zone possesses the typical characteristics of pyrite.Igneous rock contains a mineral similar to pyrite,confirmed by both having similar Raman peaks.The scattering intensity of Ag indicates that the formation pressure of pyrite increases from thermally-altered coal via the boundary between the coke zone and the igneous rock. | Xing Chen Liugen Zheng Yalin Jiang Chunlu Jiang | 2021 | International Journal of Coal Science & Technology2021，8，1： | 0 |
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