为揭示冻融循环对土壤物理性质及抗冲性的影响,以内蒙古坡耕地风沙土为研究对象,控制冻融循环次数(0~10次)和土壤质量含水量(6%,9%,12%)2个因素,在室内模拟野外冻融循环和径流冲刷过程,定量分析冻融循环对土壤含水量、容重、孔隙度及土壤抗冲性的影响规律。结果表明:(1)土壤含水量随冻融循环次数增加呈缓慢增加的趋势,增加幅度为0.51%~0.87%,且高含水量土壤增幅比低含水量土壤大;(2)随冻融循环次数的增加,土壤容重和孔隙度分别呈缓慢减小和增大趋势,且变化幅度逐渐降低,最后达到基本稳定的状态 ...
肖俊波, 张乐涛
doaj
[Research progress in application of metal-organic framework-derived materials to sample pretreatment]. [PDF]
Zhang W +5 more
europepmc +1 more source
[Recent advance of new sample preparation materials in the analysis and detection of environmental pollutants]. [PDF]
Feng J +8 more
europepmc +1 more source
[Applications of microfluidic paper-based chips in environmental analysis and detection]. [PDF]
Zhang Y +10 more
europepmc +1 more source
以黄土高原丘陵沟壑区李家堡乡的荒草地、文冠果林地、沙棘林地和柠条灌丛为研究对象,采用野外采样与室内分析相结合的方法,研究了4种植被类型土壤的物理特征及其渗透特征。结果表明:随土层深度的增加,土壤容重大体呈增加趋势,而土壤各孔隙度和通气度呈下降趋势。4种植被类型中荒草地的土壤容重最大,孔隙度及通气度最小,而柠条灌丛的土壤容重最小,孔隙度及通气度最大。土壤水分物理特征值为柠条灌丛最大,文冠果林和沙棘林次之,荒草地最小;柠条灌丛0—40 cm土层土壤最大持水量、毛管持水量、最小持水量、最大蓄水量 ...
吴江琪, 马维伟, 李广, 陈国鹏
doaj
[Analysis of parabens in environmental water samples by covalent organic framework-based magnetic solid-phase extraction-high performance liquid chromatography]. [PDF]
Bao Y, Zhai Y, Ning T, Chen P, Zhu S.
europepmc +1 more source
以江西省鹰潭市的典型旱地、稻田和林地为研究对象,采用野外亮蓝染色示踪试验结合室内图像处理的方法,量化了各样地土壤剖面染色特征参数,明确了水流类型的剖面分布规律,并揭示了土壤理化性质对水流特征的影响机制。结果表明:染色面积比(SAR)随着土层深度的增加急剧降低,0-60 cm土层的平均SAR表现为稻田(28.16%)高于旱地(21.95%)和林地(18.64%),SAR差异主要体现在5-25 cm土层;染色路径数(SPN)随着土层深度的增加先增加后减小,整个剖面的平均SPN为稻田最多(20条),旱地其次 ...
张海林 +7 more
doaj
[Advances in solid-phase extraction for bisphenols in environmental samples]. [PDF]
Liu H, Jin J, Guo C, Chen J, Hu C.
europepmc +1 more source
[Fabrication of nanomaterials incorporated polymeric monoliths and application in sample pretreatment]. [PDF]
Li Z, Li N, Zhao T, Zhang Z, Wang M.
europepmc +1 more source
[Determination of organophosphorus pesticides based on graphene oxide aerogel solid phase extraction column]. [PDF]
Hou X, Yu H, Zhu F, Li Z, Yang Q.
europepmc +1 more source

