CAJ | 학술논문

以大沽河下游海水人侵砂质含水层为研究对象,采集地下淡水、海水和含水介质样品,并测定其组成和性质.通过渗流装置模拟咸淡水驱替过程,测定驱替过程中含水介质的渗透性参数和主要离子的变化规律,并尝试用数值模拟方法定量研究水敏感性影响下的多组分离子交换过程.研究结果表明,海水驱替淡水情况下.Na~+能将砂土吸附的ca~(2+)、Mg~(2+)、K~+交换出来,Na~+-Ca~(2+)、Na~+-K~+交换速度很快,而Na~+-Mg~(2+)交换反应持续时间较长;在淡水驱替海水的过程中,溶液中的Ca~(2+)、Mg~(2+)将介质吸附的Na~+、K~+交换出来,但Ca~(2+)-Na~+交换起主导作用.含水介质的动力学参数和突破曲线的拐点变化均进一步验证了咸淡过渡带的水敏感性现象,多组分离子的交换行为导致了水敏感现象的发生.
이대고하하유해수인침사질함수층위연구대상,채집지하담수、해수화함수개질양품,병측정기조성화성질.통과삼류장치모의함담수구체과정,측정구체과정중함수개질적삼투성삼수화주요리자적변화규률,병상시용수치모의방법정량연구수민감성영향하적다조분리자교환과정.연구결과표명,해수구체담수정황하.Na~+능장사토흡부적ca~(2+)、Mg~(2+)、K~+교환출래,Na~+-Ca~(2+)、Na~+-K~+교환속도흔쾌,이Na~+-Mg~(2+)교환반응지속시간교장;재담수구체해수적과정중,용액중적Ca~(2+)、Mg~(2+)장개질흡부적Na~+、K~+교환출래,단Ca~(2+)-Na~+교환기주도작용.함수개질적동역학삼수화돌파곡선적괴점변화균진일보험증료함담과도대적수민감성현상,다조분리자적교환행위도치료수민감현상적발생.
With the sandy aquifer lying in the seawater intrusion area of the Dagu River in Qingdao as the study object, the authors collected groundwater, seawater and the media to evaluate their composition and properties. Through seepage simulation of the process of seawater and fresh-water, the authors determined the regularity of the permeability and the main ions in the course of seawater and fresh-water displacement. Numerical simulation was also employed to study water sensitivity under the influence of ion exchange. The results indicate that, in the process of seawater displacing freshwater, ion exchanges of Na~+-Ca~(2+), Na~+-Mg~(2+) and Na~+-K~+ take place, with the ion exchange speed of Na~+-Ca~(2+) and Na~+-K~+ fairly quick but that of Na~+-Mg~(2+) relatively slow. During the course of freshwater displacing seawater, Ca~(2+) and Mg~(2+) in solution can replace Na~+ and K~+ in the media, with Ca~(2+)- Na~+ playing the dominant role. The kinetic parameters and the turning point of the breakthrough curve verify the water sensitivity phenomenon in the seawater and fresh-water transitional zone, Multi-component ion exchange leads to the phenomenon of water sensitivity.