25-04-2019 дата публикации
Номер: US20190120741A1
Автор:
Chen Fan,
CUI Shuangchao,
Guo Lili,
Li Shupeng,
Liu Peng,
Liu Yan,
Niu Qiang,
Song Xiaowei,
YANG Yuewei,
YIN Pengcheng,
Zhang Xiaobin,
ZHANG Yue
Принадлежит:
A method for determining the diffusion radius of in-situ injection and remediation of contaminated soil and groundwater. According to the triangle method, the hole spacing is perpendicular to the groundwater flow direction, the row spacing is along the groundwater flow direction, and the flow diffusion in the groundwater during the effective time of the remediation agent reaction is considered. Under high pressure rotary injection, the remediation agent and a certain proportion of bromide ions are simultaneously injected into the aquifer as a tracer. The diffusion of the agent is determined by observing the phenomenon of slurry-returning and slurry-channeling of adjacent injection points. After the completion of the injection, the groundwater is quickly sampled in fixed depth, the tracer concentration is quickly detected on site, and the concentration of bromide ions in the groundwater is compared with the background value. Comprehensive determination determines the optimal diffusion radius. 1. A method for determining the diffusion radius of in-situ injection and remediation of contaminated soil and groundwater , characterized in that ,step one: distributing and guided-boring: [{'br': None, 'i': L=', 'R, 'sub': '0', '1.73\u2003\u2003(1)'}, {'br': None, 'i': B=', 'R', '+B, 'sub': 0', '1, '1.50\u2003\u2003(2)'}, {'br': None, 'i': 'v=KI', '(3)'}, {'br': None, 'i': B', '=vt, 'sub': '1', '(4)'}], 'the in-situ injection holes distribution parameters satisfies the following formula{'sub': 0', '1, 'wherein L—the optimal holes spacing of the in-situ injection points, perpendicular to the groundwater flow direction; B—the optimal row spacing of in-situ injection points, along the groundwater flow direction; R—effective diffusion radius of the agent in the aquifer under high pressure injection conditions, unit: m; K—permeability coefficient of aquifer, unit: m/d; I—hydraulic gradient of groundwater; v—flow rate of groundwater, unit: m/d; t—effective reaction time of the agent ...
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