| 有机酸培养时间和种类对煤矸石碎屑组成及速效养分的影响 |
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| 引用本文： | 余健,王鑫鑫,房莉,汪梦甜,卞正富,周光,解进飞,张经纬.有机酸培养时间和种类对煤矸石碎屑组成及速效养分的影响[J].农业工程学报,2020,36(2):228-235. |
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| 作者姓名： | 余健 王鑫鑫 房莉 汪梦甜 卞正富 周光 解进飞 张经纬 |
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| 作者单位： | 安徽师范大学地理与旅游学院,江淮流域地表过程与区域响应安徽省重点实验室,芜湖 241003;安徽师范大学地理与旅游学院,江淮流域地表过程与区域响应安徽省重点实验室,芜湖 241003;资源环境与地理信息工程安徽省工程技术研究中心,芜湖 241003;中国矿业大学环境与测绘学院,徐州,221116 |
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| 基金项目： | 国家自然科学基金项目（41101529；31670615）；安徽高校自然科学研究项目（KJ2019A0508；KJ2017A308）；安徽师范大学博士启动基金项目（2016XJJ107）；安徽师范大学研究生科研创新与实践项目（2019KYCX053） |
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| 摘 要： | 为研究有机酸添加后煤矸石碎屑组成及其速效养分变化,以淮南潘集矿区为研究区域,选取矿区内多处煤矸石山上大块煤矸石人工破碎后作为供试材料,向其中添加10 mmol/L低分子量有机酸和腐殖酸水溶液,恒温培养120 d,在不同培养阶段取出部分样品测定煤矸石碎屑颗粒组成、EC、pH和速效养分等指标。结果表明,有机酸的添加总体上促进了煤矸石碎屑颗粒的细化。其中,黏粒平均增幅达81.90%,极细砂增幅在42%以上,粉粒和极粗砂粒含量平均下降幅度分别为21.05%、62.34%。有机酸添加有助于煤矸石碎屑颗粒基质结构向好的方向发展,并且以柠檬酸和腐殖酸效果最好。培养后的各处理pH值、电导率、速效养分对有机酸种类和培养时间的响应存在显著差异。有机酸添加后,酒石酸、草酸和腐殖酸处理pH均上升较大,平均pH值分别为7.69、7.75和7.71,显著大于对照处理(P<0.05),达到微碱性水平。除苹果酸处理外,其他处理的pH随培养时间的变化表现“N”型特征。电导率的变化与pH值变化正好相反,以苹果酸处理上升最大,比培养前增幅达146.78%;有机酸添加极大促进了煤矸石碎屑碱解氮(AN)和速效磷(AP)的释放,前者以苹果酸效果较好(释放量最大为CK的1.56倍和培养前的13.03倍),后者以柠檬酸效果较好(释放量最大为培养前的2.56倍和CK的3.39倍)。随着培养时间延长,碱解氮和速效磷释放量均逐渐增加;水分浸润和有机酸溶液添加均在前期表现一定抑制煤矸石碎屑颗粒速效钾(AK)释放的作用,后期逐渐表现一定促进释放的作用,但各有机酸处理之间差异不显著。有机酸对煤矸石山生态修复肯有一定积极作用。
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| 关 键 词： | 煤矿 修复 有机酸 煤矸石 腐殖酸 理化性质 淮南矿区 |
| 收稿时间： | 2019/7/2 0:00:00 |
| 修稿时间： | 2019/11/28 0:00:00 |
Impact of organic acids cultivation time and types on composition of debris and available nutrient in coal gangue |
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| Yu Jian,Wang Xinxin,Fang Li,Wang Mengtian,Bian Zhengfu,Zhou Guang,Xie Jinfei and Zhang Jingwei.Impact of organic acids cultivation time and types on composition of debris and available nutrient in coal gangue[J].Transactions of the Chinese Society of Agricultural Engineering,2020,36(2):228-235. |
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| Authors: | Yu Jian Wang Xinxin Fang Li Wang Mengtian Bian Zhengfu Zhou Guang Xie Jinfei and Zhang Jingwei |
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| Institution: | 1.School of Geography and Tourism, Anhui Normal University, Key Laboratory of Earth Surface Processes and Regional Response in the Yangtze-Huaihe River Basin, Wuhu 241003, China;,1.School of Geography and Tourism, Anhui Normal University, Key Laboratory of Earth Surface Processes and Regional Response in the Yangtze-Huaihe River Basin, Wuhu 241003, China;,1.School of Geography and Tourism, Anhui Normal University, Key Laboratory of Earth Surface Processes and Regional Response in the Yangtze-Huaihe River Basin, Wuhu 241003, China;3. Engineering Technology Research Center of Resource Environment and GIS, Wuhu 241003, China,1.School of Geography and Tourism, Anhui Normal University, Key Laboratory of Earth Surface Processes and Regional Response in the Yangtze-Huaihe River Basin, Wuhu 241003, China; 3. Engineering Technology Research Center of Resource Environment and GIS, Wuhu 241003, China,2.School of Environment Science and Spatial Informatics, China University of Ming and Technology, Xuzhou 221116, China;,1.School of Geography and Tourism, Anhui Normal University, Key Laboratory of Earth Surface Processes and Regional Response in the Yangtze-Huaihe River Basin, Wuhu 241003, China;,1.School of Geography and Tourism, Anhui Normal University, Key Laboratory of Earth Surface Processes and Regional Response in the Yangtze-Huaihe River Basin, Wuhu 241003, China; and 1.School of Geography and Tourism, Anhui Normal University, Key Laboratory of Earth Surface Processes and Regional Response in the Yangtze-Huaihe River Basin, Wuhu 241003, China; |
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| Abstract: | Organic acids are ubiquitous in litters and rhizosphere in terrestrial ecosystem,and low molecular weight organic acids and humic acids are two common acids among them.They play a significant role in soil genesis,soil fertility and soil decontamination.However,the efficacy of organic acids in restoring vegetation in coal gangue is poorly understood.We took the coal gangue at Panji coal mining in Huainan city as an example.Low molecular weight organic acids and humic acid solution each at concentration of 10 mmol/L were added into the coal gangue in a 120-day incubation.The change in physical and chemical properties of the gangue was measured periodically.The results showed that the organic acids,especially malic acid and humic acid,promoted refinement of the gangue mineral particles and particle agglomerations,and helped improving aggregation of the mineral particles in the gangue.The incubation increased the clay particles by an average 81.9%and reduced the proportion of silt and very coarse sands by an average 21.05%and 62.34%,respectively.Many coarse sands were broken down to silt and clay which in turn formed aggregates.The pH,electrical conductivity(EC)and bioavailable nutrients in the coal gangue debris responded differently to the organic acids and incubation time.The pH of the studied gangue was 6.72 prior to incubation,and amending it with tartaric acid,oxalic acid and humic acid increased the pH to 7.69,7.75 and 7.71 respectively.The pH changed with time in all the treatments;in the malic acid treatment,it changed in an"N"shape.In all treatments,EC changed with time in an opposite direction to the change in pH.The EC of the gangue was 416.67μs/cm prior to the incubation;the incubation increased the EC in CK and the treatments with malic acid and citric but reduced it in other treatments.Specifically,incubating with malic acid increased the EC by 146.78%,the highest among all treatments.Incubation with organic acids promoted the release of alkali-hydro nitrogen(AN)and available phosphorus(AP)from the mineral particles,while incubation with malic acid improved the release of AN more than others.In contrast,the citric was most effective in releasing AP.In all treatments,prolonging the incubation enhanced the release of alkali nitrogen and available phosphorus.Water infiltration and addition of the organic acids inhibited the release of available potassium(AK)from the mineral particles in the early stage,but promoted the release of the potassium.However,there was no significant difference between the organic acids.The results presented in this paper shed insight into the efficacy of different organic acids in remediating coal gangue. |
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| Keywords: | coal mines remediation organic acid coal gangue humic acid physicochemical property Huainan mine |
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