Pub Date : 2017-01-01DOI: 10.12783/ISSN.1544-8053/14/1/29
Jiguang Huang, Lijuan Zhou Hui Miao Ye Cui, Li Feng
S-metolachlor is a promising alternative to metolachlor. However, the extensive use of S-metolachlor as herbicide in vegetable fields in China has caused concerns about its environmental fate. Here we investigated the effects of temperature, relative humidity (RH) and PH on the degradation rate of S-metolachlor in vegetable soil. The degradation rates of S-metolachlor increased with increasing temperatures and RH and either acidic or basic PH facilitates S-metolachlor degradation. The degradation of S-metolachlor under these conditions followed the first-order kinetics resulting in the half-lives (T-1/2) ranging from 12.18 d to 70.71 d at 5–35°C, and 27.28 d to 53.72 d at RH 30–90%; and 29.62–19.69 d at pH 6–8. Stronger response of soil enzymes including catalase, dehydrogenase, urease and cellulase to S-metolachlor was detected in soil with high organic matter. PLFA profiles showed that, totally, the microbe populations including actinomycetes, fungi and bacteria increased gradually in the first 14 days after the treatment and decreased from 14d to 28d after the treatment. All the S-metolachlor treatments caused the increase of aerobe and anaerobe. High S-metolachlor concentration, 13.9 mg/kg, could cause significant variation at the first 2 weeks, stimulating growth of the entire soil microbial community. These findings might have practical implications for the fate of S-metolachlor residue in vegetable fields. Environmental factors, especially temperature, relative humidity and pH should be considered in combination with the appropriate application dose of S-metolachlor for achieving satisfactory weed-control efficacy, reducing runoff, and minimizing effects on environmental quality.
{"title":"Degradation of S-metolachlor and its Effects on Soil Enzymes and Microbial Communities in Vegetable Field Soil","authors":"Jiguang Huang, Lijuan Zhou Hui Miao Ye Cui, Li Feng","doi":"10.12783/ISSN.1544-8053/14/1/29","DOIUrl":"https://doi.org/10.12783/ISSN.1544-8053/14/1/29","url":null,"abstract":"S-metolachlor is a promising alternative to metolachlor. However, the extensive use of S-metolachlor as herbicide in vegetable fields in China has caused concerns about its environmental fate. Here we investigated the effects of temperature, relative humidity (RH) and PH on the degradation rate of S-metolachlor in vegetable soil. The degradation rates of S-metolachlor increased with increasing temperatures and RH and either acidic or basic PH facilitates S-metolachlor degradation. The degradation of S-metolachlor under these conditions followed the first-order kinetics resulting in the half-lives (T-1/2) ranging from 12.18 d to 70.71 d at 5–35°C, and 27.28 d to 53.72 d at RH 30–90%; and 29.62–19.69 d at pH 6–8. Stronger response of soil enzymes including catalase, dehydrogenase, urease and cellulase to S-metolachlor was detected in soil with high organic matter. PLFA profiles showed that, totally, the microbe populations including actinomycetes, fungi and bacteria increased gradually in the first 14 days after the treatment and decreased from 14d to 28d after the treatment. All the S-metolachlor treatments caused the increase of aerobe and anaerobe. High S-metolachlor concentration, 13.9 mg/kg, could cause significant variation at the first 2 weeks, stimulating growth of the entire soil microbial community. These findings might have practical implications for the fate of S-metolachlor residue in vegetable fields. Environmental factors, especially temperature, relative humidity and pH should be considered in combination with the appropriate application dose of S-metolachlor for achieving satisfactory weed-control efficacy, reducing runoff, and minimizing effects on environmental quality.","PeriodicalId":17101,"journal":{"name":"Journal of Residuals Science & Technology","volume":"158 1","pages":"245-254"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82771097","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}
Pub Date : 2017-01-01DOI: 10.12783/ISSN.1544-8053/14/1/31
Quan Wu, L. Jing, Quansen Wu
Mining subsidence, mine solid waste emissions caused by the direct cause of ecological environment deterioration in mining area, effective control and reduce the surface subsidence and reasonable control and utilization of mine wastes, and realize green mining is a fundamental way to reduce the damage of the ecological environment in mining area. To solve this problem, using FLAC3D three dimensional numerical simulation method, the above four factors were changed to simulate the surface movement and deformation, and the influence of the above four factors on the maximum surface subsidence was discussed. By using the orthogonal experiment, the importance of the four factors is queued, and the correlation degree ranking of the maximum subsidence value is obtained. The influence degree of the factors on the maximum surface subsidence is: the filling ratio, the thickness of the key stratum, the strength of the filling body and the thickness of the loose layer. In this paper, the content of the "three under" pressure coal mining area of production practice to provide basic data, can improve the recovery rate of coal resources, reduce the cost of filling, the maximum economic benefits. Has important practical significance to protect the ground structure, reduce the ecological damage, and realize the sustainable development of coal mine.
{"title":"Analysis on Influence Factors of Mining Subsidence in Backfilling under Thick Loose Layer","authors":"Quan Wu, L. Jing, Quansen Wu","doi":"10.12783/ISSN.1544-8053/14/1/31","DOIUrl":"https://doi.org/10.12783/ISSN.1544-8053/14/1/31","url":null,"abstract":"Mining subsidence, mine solid waste emissions caused by the direct cause of ecological environment deterioration in mining area, effective control and reduce the surface subsidence and reasonable control and utilization of mine wastes, and realize green mining is a fundamental way to reduce the damage of the ecological environment in mining area. To solve this problem, using FLAC3D three dimensional numerical simulation method, the above four factors were changed to simulate the surface movement and deformation, and the influence of the above four factors on the maximum surface subsidence was discussed. By using the orthogonal experiment, the importance of the four factors is queued, and the correlation degree ranking of the maximum subsidence value is obtained. The influence degree of the factors on the maximum surface subsidence is: the filling ratio, the thickness of the key stratum, the strength of the filling body and the thickness of the loose layer. In this paper, the content of the \"three under\" pressure coal mining area of production practice to provide basic data, can improve the recovery rate of coal resources, reduce the cost of filling, the maximum economic benefits. Has important practical significance to protect the ground structure, reduce the ecological damage, and realize the sustainable development of coal mine.","PeriodicalId":17101,"journal":{"name":"Journal of Residuals Science & Technology","volume":"6 1","pages":"271-280"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85964780","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}
Pub Date : 2017-01-01DOI: 10.12783/issn.1544-8053/14/1/25
X. She, Guang-Wang Qing-guo Xue Jung-Wook Cho, Jingping Wan
The rotary hearth furnace iron nugget process is a new technology with a huge potential to efficiently utilize high phosphorus hematite. In this paper, the influences of the basicity and additives on the phosphorus content and distribution in the iron nuggets and the slag were investigated. At first CaCO3 was added to the pellets and then Na2CO3 and CaF2 were also added in the experiments. The experimental results showed that the increase in the basicity and the addition of Na2CO3 and CaF2 were shown to be effective to inhibit the apatite reduction in high phosphorus iron ores and to reduce the phosphorus content in the nuggets. When the pellets containing 4% Na2CO3 and 4% CaF2 with the basicity at 1.4 were reduced at the temperature of 1400°C for 12 min, the phosphorus content in the iron nuggets was only 0.4% and the dephosphorization rate reached 81.2%.
{"title":"Dephosphorization in the Reduction and Melting Separation of High Phosphorus Hematite Carbon Bearing Pellets","authors":"X. She, Guang-Wang Qing-guo Xue Jung-Wook Cho, Jingping Wan","doi":"10.12783/issn.1544-8053/14/1/25","DOIUrl":"https://doi.org/10.12783/issn.1544-8053/14/1/25","url":null,"abstract":"The rotary hearth furnace iron nugget process is a new technology with a huge potential to efficiently utilize high phosphorus hematite. In this paper, the influences of the basicity and additives on the phosphorus content and distribution in the iron nuggets and the slag were investigated. At first CaCO3 was added to the pellets and then Na2CO3 and CaF2 were also added in the experiments. The experimental results showed that the increase in the basicity and the addition of Na2CO3 and CaF2 were shown to be effective to inhibit the apatite reduction in high phosphorus iron ores and to reduce the phosphorus content in the nuggets. When the pellets containing 4% Na2CO3 and 4% CaF2 with the basicity at 1.4 were reduced at the temperature of 1400°C for 12 min, the phosphorus content in the iron nuggets was only 0.4% and the dephosphorization rate reached 81.2%.","PeriodicalId":17101,"journal":{"name":"Journal of Residuals Science & Technology","volume":"30 1","pages":"201-209"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82191010","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}
Pub Date : 2017-01-01DOI: 10.12783/ISSN.1544-8053/14/S1/10
Zhang Hongen, Shijia Ling, W. Qingyuan
This paper aims to investigate the influence of curing condition on compressive strength of low-calcium fly ash-based geopolymer concrete (FAGC) by preparing six mixtures. The results also show that the specimens cured at room temperature for one day and then cured at high temperature will be helpful to obtain materials with higher strength than that of directly cured specimens at high temperature. Additionally, cured at room temperature for one day and then cured at high temperature would weaken the adverse effect of wet curing on the growth of compressive strength.
{"title":"Influence of Curing Condition on Compressive Strength of Low-calcium Fly Ash-based Geopolymer Concrete","authors":"Zhang Hongen, Shijia Ling, W. Qingyuan","doi":"10.12783/ISSN.1544-8053/14/S1/10","DOIUrl":"https://doi.org/10.12783/ISSN.1544-8053/14/S1/10","url":null,"abstract":"This paper aims to investigate the influence of curing condition on compressive strength of low-calcium fly ash-based geopolymer concrete (FAGC) by preparing six mixtures. The results also show that the specimens cured at room temperature for one day and then cured at high temperature will be helpful to obtain materials with higher strength than that of directly cured specimens at high temperature. Additionally, cured at room temperature for one day and then cured at high temperature would weaken the adverse effect of wet curing on the growth of compressive strength.","PeriodicalId":17101,"journal":{"name":"Journal of Residuals Science & Technology","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76893338","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}
Pub Date : 2017-01-01DOI: 10.12783/ISSN.1544-8053/14/1/45
Hu Yongbin, Qiu Qiang Xu Wei Gao Huiqin She Rui Niu Chenyu, Tu Shuxin
In this study, through the leaching of iron oxidizing bacteria with natural manganese ore, by the using of X-ray fluorescence, the X-ray diffraction analysis, and scanning electron microscopy testing technology to characterize the prepared eroded manganese ore, which also gives a further research on the removal performance and mechanism of the eroded manganese ore on the arsenic. The results of the experiment showed that the saturated adsorption capacity of eroded manganese ore on the As(III) and As(V) were 18.52 mg/g and 19.23 mg/g respectively. The Langmuir adsorption model adsorption gives a good description on the removal of arsenic by the eroded manganese ore. The removal rate of arsenic is positively correlated with temperature, when the pH value is near neutral, the best removal performance of eroded manganese ore on the arsenic can be achieved, and the coexisting cation (Ca2+, Mg2+) can promote the removal rate of arsenic. With the characterization experiment, it shows that the main components (Mn, Si, Fe, Al) of manganese ore did not change before and after immersion, but the content of MnO decreased by 11.62%, Fe2O3 increased by 13.38%, the content of hydroxyl increase, porosity increased by 31.81%, porosity ratio increased 0.472.
{"title":"Study on the Removal Performance of Natural Manganese Ore and Iron-Oxidizing Bacteria on the Arsenic","authors":"Hu Yongbin, Qiu Qiang Xu Wei Gao Huiqin She Rui Niu Chenyu, Tu Shuxin","doi":"10.12783/ISSN.1544-8053/14/1/45","DOIUrl":"https://doi.org/10.12783/ISSN.1544-8053/14/1/45","url":null,"abstract":"In this study, through the leaching of iron oxidizing bacteria with natural manganese ore, by the using of X-ray fluorescence, the X-ray diffraction analysis, and scanning electron microscopy testing technology to characterize the prepared eroded manganese ore, which also gives a further research on the removal performance and mechanism of the eroded manganese ore on the arsenic. The results of the experiment showed that the saturated adsorption capacity of eroded manganese ore on the As(III) and As(V) were 18.52 mg/g and 19.23 mg/g respectively. The Langmuir adsorption model adsorption gives a good description on the removal of arsenic by the eroded manganese ore. The removal rate of arsenic is positively correlated with temperature, when the pH value is near neutral, the best removal performance of eroded manganese ore on the arsenic can be achieved, and the coexisting cation (Ca2+, Mg2+) can promote the removal rate of arsenic. With the characterization experiment, it shows that the main components (Mn, Si, Fe, Al) of manganese ore did not change before and after immersion, but the content of MnO decreased by 11.62%, Fe2O3 increased by 13.38%, the content of hydroxyl increase, porosity increased by 31.81%, porosity ratio increased 0.472.","PeriodicalId":17101,"journal":{"name":"Journal of Residuals Science & Technology","volume":"146 1","pages":"379-386"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77709397","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}
Pub Date : 2017-01-01DOI: 10.12783/ISSN.1544-8053/14/1/10
Renda Yao, Mengyu Yu Yi Liu Hong Yang, H. Shi
A fully automatic miniature fermenter was operated to enrich ammoniaoxidizing bacteria (AOB) using the activated sludge obtained from the A2/O process in a wastewater treatment plant (WWTP) as the seed sludge. The results revealed that the AOB community can be enriched by a continuous ammonia feeding mode for intermittent operation, resulting in the appropriate regulation of free ammonia (FA) and free nitrous acid (FNA) levels. The maximum ammonia oxidation rate was over 170 mg/ (L·h) and nitrite accumulation ratio over 80%. High-throughput sequencing showed that Nitrosomonas belonging to AOB, were highly enriched after 27 days, having increased from 0.24% to 53.03%.
{"title":"Enrichment of Ammonia-Oxidizing Bacteria and Microbial Diversity Analysis by High-Throughput Sequencing","authors":"Renda Yao, Mengyu Yu Yi Liu Hong Yang, H. Shi","doi":"10.12783/ISSN.1544-8053/14/1/10","DOIUrl":"https://doi.org/10.12783/ISSN.1544-8053/14/1/10","url":null,"abstract":"A fully automatic miniature fermenter was operated to enrich ammoniaoxidizing bacteria (AOB) using the activated sludge obtained from the A2/O process in a wastewater treatment plant (WWTP) as the seed sludge. The results revealed that the AOB community can be enriched by a continuous ammonia feeding mode for intermittent operation, resulting in the appropriate regulation of free ammonia (FA) and free nitrous acid (FNA) levels. The maximum ammonia oxidation rate was over 170 mg/ (L·h) and nitrite accumulation ratio over 80%. High-throughput sequencing showed that Nitrosomonas belonging to AOB, were highly enriched after 27 days, having increased from 0.24% to 53.03%.","PeriodicalId":17101,"journal":{"name":"Journal of Residuals Science & Technology","volume":"7 1","pages":"77-84"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89008839","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}
Pub Date : 2017-01-01DOI: 10.12783/issn.1544-8053/14/S1/22
Zhe Qin, W. Fu, Xuxin Chen
The open pit locating in Cangshang was closed in 2005 because the reusing of pumping water resulted in the cyclic change of slope water level. In order to study the influence of water level fluctuation on mechanics parameters of the slope rocks, two kinds of typical rocks are selected to have the uniaxial compression tests of different saturation-dehydration circulation. The damage evolution law of rock mechanics parameters under water-rock interaction is found, whose results show that the mechanical properties of rock are weakened obviously by the water-rock interaction. In addition, the stronger the water-rock interaction becomes, the more obvious the weakening phenomenon is. Due to the different sensitivity to various parameters of water-rock interaction, the extent of elastic modulus decrease is the largest and uniaxial anti-compressive strength takes the second place while Poisson's ratio is essentially constant. Moreover, the uniaxial compressive strength and modulus of elasticity present exponential distribution with times of saturation-dehydration circulation. With the increase of the saturationdehydration times, the damage value increases accordingly while the increment tends to zero. Generally, the rock mechanical properties are hardly affected by water-rock interaction in the latter period; there are differences among the damage degree of various qualities of rocks, the better the quality, the smaller the damage, and the less the times reaching 95% limit damage value.
{"title":"Study on Damage Evolution Law of Rock Mechanics Parameters Under Water-Rock Interaction","authors":"Zhe Qin, W. Fu, Xuxin Chen","doi":"10.12783/issn.1544-8053/14/S1/22","DOIUrl":"https://doi.org/10.12783/issn.1544-8053/14/S1/22","url":null,"abstract":"The open pit locating in Cangshang was closed in 2005 because the reusing of pumping water resulted in the cyclic change of slope water level. In order to study the influence of water level fluctuation on mechanics parameters of the slope rocks, two kinds of typical rocks are selected to have the uniaxial compression tests of different saturation-dehydration circulation. The damage evolution law of rock mechanics parameters under water-rock interaction is found, whose results show that the mechanical properties of rock are weakened obviously by the water-rock interaction. In addition, the stronger the water-rock interaction becomes, the more obvious the weakening phenomenon is. Due to the different sensitivity to various parameters of water-rock interaction, the extent of elastic modulus decrease is the largest and uniaxial anti-compressive strength takes the second place while Poisson's ratio is essentially constant. Moreover, the uniaxial compressive strength and modulus of elasticity present exponential distribution with times of saturation-dehydration circulation. With the increase of the saturationdehydration times, the damage value increases accordingly while the increment tends to zero. Generally, the rock mechanical properties are hardly affected by water-rock interaction in the latter period; there are differences among the damage degree of various qualities of rocks, the better the quality, the smaller the damage, and the less the times reaching 95% limit damage value.","PeriodicalId":17101,"journal":{"name":"Journal of Residuals Science & Technology","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86269413","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}
Pub Date : 2017-01-01DOI: 10.12783/ISSN.1544-8053/14/1/27
S. Liang, Ke Ding, Peng Ji
Analysis of chemical compositions of fine particle matters (PM2.5) in contaminated atmospheres has increasingly become a great concern of both scientific and technological importance because the contaminant concentrations of PM2.5 are playing an important role in affecting PM2.5-induced adverse effects on environment and human health. In this paper, ultrasound-assisted extraction coupled with ICP-MS was developed for a simultaneous quantification of 12 toxic elements (Be, Al, Cr, Mn, Ni, As, Se, Sb, Tl, Pb, Hg and Cd) in PM2.5 samples. The proposed method was validated with several parameters, namely linearity of calibration, precision and accuracy, limit of detection (LOD) and limit of quantification (LOQ). The accuracy of the proposed method was validated with recovery tests of different samples spiked with corresponding elements at known concentrations (5, 10 and 20 μg/L) and the average percent recovery varied in the range of 87.3–101.3%. The results showed that this method was a multi-element technique featuring high precision and accuracy as well as low LOD. This proposed method was applied to a simultaneous determination of the 12 target elements in atmospheric fine particles collected from a heavily polluted urban residential area in China, and showed that the particles were rich in Al, Pb and Mn, followed by As, Sb, Cr, Cd, Se and Ni. The main advantages of the ultrasound-assisted extraction process were fast sample treatment and low consumption of reagents in the extraction process.
{"title":"Validation and Application of Ultrasound-assisted Extraction Coupled with ICP-MS for Determination of Toxic Metals in Fine Particles","authors":"S. Liang, Ke Ding, Peng Ji","doi":"10.12783/ISSN.1544-8053/14/1/27","DOIUrl":"https://doi.org/10.12783/ISSN.1544-8053/14/1/27","url":null,"abstract":"Analysis of chemical compositions of fine particle matters (PM2.5) in contaminated atmospheres has increasingly become a great concern of both scientific and technological importance because the contaminant concentrations of PM2.5 are playing an important role in affecting PM2.5-induced adverse effects on environment and human health. In this paper, ultrasound-assisted extraction coupled with ICP-MS was developed for a simultaneous quantification of 12 toxic elements (Be, Al, Cr, Mn, Ni, As, Se, Sb, Tl, Pb, Hg and Cd) in PM2.5 samples. The proposed method was validated with several parameters, namely linearity of calibration, precision and accuracy, limit of detection (LOD) and limit of quantification (LOQ). The accuracy of the proposed method was validated with recovery tests of different samples spiked with corresponding elements at known concentrations (5, 10 and 20 μg/L) and the average percent recovery varied in the range of 87.3–101.3%. The results showed that this method was a multi-element technique featuring high precision and accuracy as well as low LOD. This proposed method was applied to a simultaneous determination of the 12 target elements in atmospheric fine particles collected from a heavily polluted urban residential area in China, and showed that the particles were rich in Al, Pb and Mn, followed by As, Sb, Cr, Cd, Se and Ni. The main advantages of the ultrasound-assisted extraction process were fast sample treatment and low consumption of reagents in the extraction process.","PeriodicalId":17101,"journal":{"name":"Journal of Residuals Science & Technology","volume":"19 1","pages":"227-233"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79054534","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}
Pub Date : 2017-01-01DOI: 10.12783/ISSN.1544-8053/14/1/4
Yanchao Bai
The mudflats along the East Coast of China can be important alternative sources for arable lands if amended by large amount of organic fertilizers. Rich in organic matter and other nutrients, dairy manure has been considered as the economic choice for an initial fertility driver. Therefore, the goal of this study was to evaluate the impact of dairy manure amendment (DMA) as an initial fertility driver at application rates of 0, 30, 75, 150, and 300 t ha–1 on soil physicochemical properties, biomass and growth of ryegrass (Lolium perenne L.) grown in mudflat soil. The results showed that the DMA decreased soil bulk density in comparison to the unamended soil. The organic matter (OM) content in mudflat soil increased with increasing DMA rates. The salinity of mudflat soil decreased with increasing DMA rates, and the salinity at 30, 75, 150 and 300 t ha–1 DMA rates, corresponded to decreases of 26.1%, 35.8%, 37.8% and 45.4%, compared to 8.63 g kg–1 in the unamended soil. Electric conductivity (EC) of mudflat soil decreased with increasing DMA rate, while cation exchange capacity (CEC) increased duo to DMA. The contents of total N, total P, alkaline N, and available P in mudflat soil increased with increasing DMA rates. The increment of green herbage yield of ryegrass at 210 DAS at 30, 75, 150, and 300 t ha–1 DMA rates were 257.7%, 303.5%, 414.8%, and 516.6%, compared to the unamended soil (p < 0.05). Soil total Cu and Zn increased while total Mn, Ni, and Cr remained unchanged in response to DMA due to the high Cu and Zn content in the dairy manure. However, The DMA increased most of available metals except for Ni. In summary, land application of dairy manure as initial fertility driver could be an effective and safe way to amend mudflat soil, due to the rapid development of soil initial fertility, which enhanced green manure ryegrass (Lolium perenne L.) growth.
中国东部沿海泥滩如果大量施用有机肥，可以成为重要的替代耕地资源。由于富含有机物和其他营养物质，奶牛粪便被认为是最初的生育驱动因素的经济选择。因此，本研究的目的是评价乳粪肥改良剂(DMA)作为初始肥力驱动剂，在0、30、75、150和300 t hm - 1施用量下对生长在泥滩土壤中的黑麦草(Lolium perenne L.)土壤理化性质、生物量和生长的影响。结果表明，与未加改性的土壤相比，加改性后的土壤容重明显降低。泥滩土壤有机质(OM)含量随DMA速率的增加而增加。随着DMA速率的增加，泥滩土壤的盐度呈下降趋势，在DMA速率为30、75、150和300 t ha-1时，泥滩土壤的盐度分别比未处理的8.63 g kg-1降低了26.1%、35.8%、37.8%和45.4%。泥滩土壤电导率(EC)随DMA速率的增加而降低，阳离子交换容量(CEC)随DMA速率的增加而增加。泥滩土壤全氮、全磷、碱氮和速效磷含量随DMA速率的增加而增加。210 DAS条件下黑麦草在30、75、150和300 t ha-1 DMA速率下的绿草产量比未改良土壤分别增加了257.7%、303.5%、414.8%和516.6% (p < 0.05)。由于牛粪中Cu和Zn含量较高，土壤总Cu和Zn增加，而总Mn、Ni和Cr保持不变。然而，DMA增加了除Ni以外的大部分可用金属。综上所述，由于土壤初始肥力的快速发展，促进了绿肥黑麦草(Lolium perenne L.)的生长，乳粪肥作为初始肥力驱动剂的土地施用可能是一种有效且安全的泥滩土壤改良方式。
{"title":"Evaluating Dairy Manure as Initial Fertility Driver for Mudflat Soil Amendment","authors":"Yanchao Bai","doi":"10.12783/ISSN.1544-8053/14/1/4","DOIUrl":"https://doi.org/10.12783/ISSN.1544-8053/14/1/4","url":null,"abstract":"The mudflats along the East Coast of China can be important alternative sources for arable lands if amended by large amount of organic fertilizers. Rich in organic matter and other nutrients, dairy manure has been considered as the economic choice for an initial fertility driver. Therefore, the goal of this study was to evaluate the impact of dairy manure amendment (DMA) as an initial fertility driver at application rates of 0, 30, 75, 150, and 300 t ha–1 on soil physicochemical properties, biomass and growth of ryegrass (Lolium perenne L.) grown in mudflat soil. The results showed that the DMA decreased soil bulk density in comparison to the unamended soil. The organic matter (OM) content in mudflat soil increased with increasing DMA rates. The salinity of mudflat soil decreased with increasing DMA rates, and the salinity at 30, 75, 150 and 300 t ha–1 DMA rates, corresponded to decreases of 26.1%, 35.8%, 37.8% and 45.4%, compared to 8.63 g kg–1 in the unamended soil. Electric conductivity (EC) of mudflat soil decreased with increasing DMA rate, while cation exchange capacity (CEC) increased duo to DMA. The contents of total N, total P, alkaline N, and available P in mudflat soil increased with increasing DMA rates. The increment of green herbage yield of ryegrass at 210 DAS at 30, 75, 150, and 300 t ha–1 DMA rates were 257.7%, 303.5%, 414.8%, and 516.6%, compared to the unamended soil (p < 0.05). Soil total Cu and Zn increased while total Mn, Ni, and Cr remained unchanged in response to DMA due to the high Cu and Zn content in the dairy manure. However, The DMA increased most of available metals except for Ni. In summary, land application of dairy manure as initial fertility driver could be an effective and safe way to amend mudflat soil, due to the rapid development of soil initial fertility, which enhanced green manure ryegrass (Lolium perenne L.) growth.","PeriodicalId":17101,"journal":{"name":"Journal of Residuals Science & Technology","volume":"20 1","pages":"27-34"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79108127","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}
Pub Date : 2017-01-01DOI: 10.12783/ISSN.1544-8053/14/1/24
Weitao Liu, Xiangxi Meng, Hui Zhang
Hydraulic fracturing technology is an effective means of changing the structure of coal and rock, which is a key issue in solving the technical problem of coal mine. The technology can not only change the structure of the coal and rock mass, reduce the pressure on the hard roof, reduce the concentration of coal dust, protect the working environment, increase the natural ignition cycle, and avoid fire accidents, but can also prevent any residual material from polluting the groundwater and soil during excavation. In this paper, the effects of the water injection parameters and fracture inclination angle on hydraulic fracturing are firstly studied by numerical simulation, before hydraulic fracturing on the hard roof is subjected to a field test. The results show that the cracking effect is obvious, the hard roof pressure and coal dust concentration are reduced.
{"title":"Hydraulic Fracturing Technology and Environmental Protection","authors":"Weitao Liu, Xiangxi Meng, Hui Zhang","doi":"10.12783/ISSN.1544-8053/14/1/24","DOIUrl":"https://doi.org/10.12783/ISSN.1544-8053/14/1/24","url":null,"abstract":"Hydraulic fracturing technology is an effective means of changing the structure of coal and rock, which is a key issue in solving the technical problem of coal mine. The technology can not only change the structure of the coal and rock mass, reduce the pressure on the hard roof, reduce the concentration of coal dust, protect the working environment, increase the natural ignition cycle, and avoid fire accidents, but can also prevent any residual material from polluting the groundwater and soil during excavation. In this paper, the effects of the water injection parameters and fracture inclination angle on hydraulic fracturing are firstly studied by numerical simulation, before hydraulic fracturing on the hard roof is subjected to a field test. The results show that the cracking effect is obvious, the hard roof pressure and coal dust concentration are reduced.","PeriodicalId":17101,"journal":{"name":"Journal of Residuals Science & Technology","volume":"7 1","pages":"193-199"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83377572","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：