KR19990050112A - How to clean heavy metal contaminated soil - Google Patents
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- KR19990050112A KR19990050112A KR1019970069173A KR19970069173A KR19990050112A KR 19990050112 A KR19990050112 A KR 19990050112A KR 1019970069173 A KR1019970069173 A KR 1019970069173A KR 19970069173 A KR19970069173 A KR 19970069173A KR 19990050112 A KR19990050112 A KR 19990050112A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
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Abstract
중금속 이온을 탈착하는 성질이 우수하고 미생물에 의한 자연적 분해가 가능한 특정 저분자 유기산을 주성분으로 하는 본 발명에 의한 조성물을 오염토양내에 용출제로 투입하여 중금속을 제거하는 본 발명에 의한 중금속 오염토양의 정화방법을 이용하면 광범위한 지역에 걸쳐 중금속을 효율적으로 제거, 회수할 수 있게 된다.Method for purifying heavy metal contaminated soil according to the present invention which removes heavy metals by introducing a composition according to the present invention, which has excellent properties of desorbing heavy metal ions and which is capable of naturally decomposing by microorganisms, as a dissolution agent in contaminated soil. Efficiently remove and recover heavy metals over a wide range of locations.
Description
본 발명은 오염토양의 정화방법에 관한 것으로서, 보다 상세하게는 중금속으로 오염된 토양으로부터 중금속을 제거함으로써 오염토양을 정화하는 방법에 관한 것이다.The present invention relates to a method for purifying contaminated soil, and more particularly, to a method for purifying contaminated soil by removing heavy metal from soil contaminated with heavy metal.
일반적으로 토양에는 자연발생적으로 또는 인위적인 경로를 통해 유입된 중금속이 다소 함유되어 있다. 납, 구리, 카드륨, 아연 및 수은 등을 비롯한 여러 중금속들은 토양내에 적절한 함량이 유지되는 경우 토양으로부터 많은 영양분을 공급받는 식물 등의 다양한 생물체에게 있어서 꼭 필요한 존재이기도 한 반면, 지나치게 과량이 함유되는 경우에는 직,간접적인 경로를 통해 인간에게 매우 위해한 영향을 끼치기도 한다. 산업화가 급속히 진행됨에 따라, 각종 유해물질이 투기 및 유출됨으로써 토양과 지하수를 심각하게 오염시키고 있다. 특히, 공단지역, 도시폐기물 처리지역 및 폐광/탄광 주변지역의 경우, 토양에 함유된 중금속의 농도는 일반적인 지역의 자연상태의 토양에 비해 몇백배 높은 것으로 보고되고 있다. 극도의 산업화가 초래한 토양의 오염은 토양의 자연정화능력의 범위를 넘어서 인류에게 커다란 위해요인으로까지 부상하고 있는 것이 현실이므로 토양에 함유된 중금속을 제거함으로써 오염토양을 정화시키는 문제는 생태계의 적절한 조정이라는 차원을 넘어 인류생존의 문제로까지 인식되고 있다.In general, soils contain some heavy metals, either naturally occurring or through artificial routes. Many heavy metals, including lead, copper, cadmium, zinc and mercury, are essential for a variety of organisms, such as plants that receive a lot of nutrients from the soil if they are maintained in the soil, In some cases, direct and indirect routes have very harmful effects on humans. As industrialization progresses rapidly, various harmful substances are dumped and spilled, which seriously pollutes soil and groundwater. In particular, in industrial areas, urban waste treatment areas, and abandoned mines and coal mines, the concentration of heavy metals in the soil is reported to be several hundred times higher than that of natural soils in the general area. Soil pollution caused by extreme industrialization has emerged as a major hazard to human beings beyond the soil's natural purification capacity. Therefore, the problem of purifying polluted soil by removing heavy metals contained in the soil is the proper It is recognized as a problem of human survival beyond coordination.
사고 혹은 무단투기로 인해 유출된 중금속은 여러 경로를 통해 토양과 반응하게 되며 그 반응의 속도는 토양내의 유기물질, 점토성분 및 수산화물의 양과 성상에 따라 변하게 된다. 종래부터 토양내에 존재하는 중금속을 제거하기 위한 다양한 연구가 있어 왔는데, 그 중에서 이온교환수지 또는 전기분해를 이용한 방법이 그 주류를 이루어왔다. 그러나, 상기 방법들은 순도가 매우 높은 중금속의 처리 및 회수에는 유용한 측면이 없지 않으나, 중금속의 순도가 다소 떨어지거나 중금속이외에 기타 오염물질들이 함께 함유되어 있는 일반적인 토양의 정화방법으로는 그다지 효율적이지 못하다는 결점을 지니고 있었다. 게다가, 광대한 지역에 걸친 중금속 오염토양을 정화시키는 데 있어서 그 시설 투자의 경제성이 확보되지 않는다는 문제점 역시 해결해야될 과제로 남아 있었다.Heavy metals spilled due to accident or unauthorized dumping react with soil through various paths, and the rate of reaction varies depending on the amount and nature of organic matter, clay and hydroxide in the soil. Conventionally, various studies have been made to remove heavy metals present in the soil, and among them, ion exchange resins or electrolysis have been the mainstream. However, these methods do not have useful aspects for the treatment and recovery of heavy metals with high purity, but they are not very effective for general soil purification methods in which the purity of heavy metals is slightly reduced or other contaminants are contained in addition to heavy metals. It was flawed. In addition, the problem that the economic feasibility of investing in the facility in purifying heavy metal contaminated soils over large areas also remained a challenge to be solved.
따라서, 본 발명자들은 중금속이 함유된 토양으로부터 중금속을 제거해내는 방법에 관하여 많은 연구와 실험을 수행한 결과, 중금속 이온을 탈착하는 성질이 우수함은 물론, 토양에 잔존하는 경우에라도, 미생물에 의한 자연분해가 용이하여 토양의 2차적 오염위험이 없는 물질을 용출제로 이용하여 토양으로부터 중금속을 제거해내는 방법을 착안하여 본 발명에 이르게 되었다.Therefore, the present inventors have conducted many studies and experiments on the method of removing heavy metals from soils containing heavy metals, and the decomposing properties of heavy metal ions are excellent, as well as spontaneous decomposition by microorganisms even in the soil. The present invention has been made by devising a method for removing heavy metals from the soil by using a substance that is not easily in danger of secondary contamination of the soil as an eluent.
본 발명이 이루고자 하는 기술적 과제는 중금속을 탈착하는 성질이 우수하고 토양내에 존재하는 미생물에 의해 자연분해가 용이한 특성을 지니는 용출제용 조성물을 제공하는 것이다.The technical problem to be achieved by the present invention is to provide a composition for the eluent having excellent properties of desorbing heavy metals and having a property that is easily decomposed by microorganisms present in the soil.
본 발명이 이루고자 하는 기술적 과제는 상기 용출제용 조성물을 이용하여 다양한 종류 및 순도의 중금속으로 오염된 광범위한 토양으로부터 중금속을 제거하는 방법을 제공하는 것이다.The technical problem to be achieved by the present invention is to provide a method for removing heavy metals from a wide range of soils contaminated with heavy metals of various types and purity by using the composition for the eluent.
도 1은 토양세척법의 일례를 나타낸 공정도이다.1 is a process chart showing an example of the soil washing method.
도 2는 오염토양내로 시트르산을 투입하는 방법을 개략적으로 나타낸 것이다.Figure 2 schematically shows a method of injecting citric acid into the contaminated soil.
도 3은 시트르산의 투입에 따른 유출류의 pH변화를 나타낸 그래프이다.Figure 3 is a graph showing the pH change of the effluent with the addition of citric acid.
도 4는 시트르산의 투입에 따른 납 제거율 변화를 나타낸 그래프이다.4 is a graph showing the change in lead removal rate according to the input of citric acid.
상기 기술적 과제를 달성하기 위하여, 본 발명에서는 시트르산, 아세트산 및 옥살산으로 이루어진 군으로부터 선택된 어느 하나의 저분자 유기산을 주성분으로 하는, 토양내에 투입되어 중금속을 탈착시키는 성질을 지니는 용출제용 조성물이 제공된다.In order to achieve the above technical problem, the present invention provides a composition for the eluent having a property of desorbing heavy metals into the soil, which has a low molecular organic acid selected from the group consisting of citric acid, acetic acid and oxalic acid as a main component.
상기 다른 기술적 과제를 달성하기 위하여, 본 발명에서는 상기 조성물을 용출제로 이용하여 중금속으로 오염된 토양으로부터 중금속을 탈착, 제거하는 것을 특징으로 하는 중금속 오염토양의 정화방법이 제공된다.In order to achieve the above technical problem, the present invention provides a method for purifying heavy metal contaminated soil, characterized in that the heavy metal is desorbed and removed from the soil contaminated with heavy metal using the composition as an eluent.
여기서, 상기 용출제라 함은 추출대상물에 대한 용해성이 우수한 일종의 매질로서, 환경공학 분야의 오염물 처리방법중 이른바 화학적 처리방법에 흔히 이용되는 물질을 가리킨다. 추출대상물은 용출제와 함께 액상으로 분리된 후, 회수공정을 거쳐 재생되는 것이 일반적이다.Here, the eluent is a kind of medium having excellent solubility in an extract, and refers to a material commonly used in chemical treatment methods among pollutants in the environmental engineering field. The extracted object is generally separated into the liquid phase together with the eluent and then regenerated through a recovery process.
본 발명의 바람직한 일실시예에 의하면, 상기 시트르산 등의 저분자 유기산을 주성분으로 하는 용출제용 조성물로는 pH가 5 내지 7이고, 주성분인 시트르산 등의 저분자 유기산의 농도가 10 내지 100mM인 것을 선택한다.According to a preferred embodiment of the present invention, as the composition for the eluent having a low molecular organic acid, such as citric acid as a main component, a pH of 5 to 7, the concentration of a low molecular organic acid, such as citric acid as the main component is selected from 10 to 100mM. .
이하, 본 발명에 의한 중금속 오염토양의 정화방법을 보다 상세히 설명하기로 한다.Hereinafter, the method for purifying heavy metal contaminated soil according to the present invention will be described in detail.
본 발명에 의한 오염토양의 정화방법의 원리는 용출제의 주성분인 저분자 유기산과 토양내에 존재하는 중금속과의 착화합물 형성 메카니즘에 그 기초를 두고 있다. 즉, 본 발명에 의하면 토양내에 이온상태로 존재하는 중금속이 상기 저분자 유기산 이온과 반응하여 착화합물을 형성함으로써 토양으로부터 제거되게 된다. 일반적으로는 투입되는 조성물중 저분자 유기산의 농도가 높을수록 중금속 제거효율이 높아지게 되나, 바람직하기로는 10 내지 100mM 범위의 농도가 적당하다. 왜냐하면, 저분자 유기산의 함유농도가 10mM미만인 경우, 중금속 제거효율을 바람직한 수준으로 유지할 수 없게 되고, 반면에 농도가 100mM을 초과하게 되면 약품비가 과다하게 소요됨과 동시에 자연환경에 악영향을 초래하게 된다는 문제가 있다.The principle of the method for purifying contaminated soil according to the present invention is based on the complex formation mechanism of the low molecular organic acid, which is the main component of the eluent, and the heavy metals present in the soil. That is, according to the present invention, the heavy metal existing in the ionic state in the soil is removed from the soil by forming a complex compound by reacting with the low molecular organic acid ions. In general, the higher the concentration of the low molecular organic acid in the composition to be added, the higher the heavy metal removal efficiency, but preferably a concentration in the range of 10 to 100mM. If the concentration of low-molecular organic acid is less than 10 mM, heavy metal removal efficiency cannot be maintained at a desirable level. On the other hand, if the concentration exceeds 100 mM, the chemical cost is excessively consumed and adversely affects the natural environment. have.
또한, 투입하는 조성물의 pH는 5 내지 7의 범위로 조절하는 것이 바람직한데, 이는 상기 범위의 pH를 지닐때 저분자 유기산 이온과 중금속 이온간의 착화합물 형성반응이 가장 활발하게 일어나기 때문이다. 일반적으로, 토양내에 존재하는 중금속 이온은 저분자 유기산으로부터 해리되거나 토양내 용액에 존재하는 수소이온에 비해 저분자 유기산 이온과의 반응활성이 매우 크다고 알려져 있다. 다시 말하면, 저분자 유기산과 중금속과의 착화합물 형성의 척도가 되는 중금속-저분자 유기산 이온의 안정도 상수값(Stability Constant)이 저분자 유기산 이온-수소이온의 반응상수값보다 크기 때문에 수소이온과 중금속 이온의 양이 비슷한 경우에는 상기 착화합물 형성반응이 활발하게 일어나기 때문이다. 수소이온의 양은 pH로서 나타낼 수 있는데, pH는 pH = -log[H+]로 계산되는 수소이온농도로서, 지나치게 pH가 낮으면 다량의 수소이온이 존재함을 의미한다. pH가 5 내지 7인 범위에서 수소이온의 농도는 중금속 이온의 농도와 비슷하므로, 이 범위에서 중금속과 저분자 유기산 이온과의 착화합물 형성반응은 수소이온과 저분자 유기산 이온간의 반응에 우선하게 되며, 따라서 이 때의 중금속 제거효율은 투입하는 저분자 유기산의 pH에 무관하다고 말할 수 있다.In addition, the pH of the composition to be added is preferably adjusted in the range of 5 to 7, because the complex forming reaction between the low molecular organic acid ions and heavy metal ions occurs most actively when the pH in the above range. In general, heavy metal ions present in the soil are known to have a greater reaction activity with low molecular weight organic acid ions than hydrogen ions dissociated from the low molecular weight organic acids or present in solutions in the soil. In other words, since the stability constant of the heavy metal-low molecular weight organic acid ion, which is a measure of complex compound formation between the low molecular weight organic acid and heavy metal, is larger than the reaction constant value of the low molecular weight organic acid ion-hydrogen ion, the amount of hydrogen ion and heavy metal ion This is because, in similar cases, the complex formation reaction takes place vigorously. The amount of hydrogen ions can be expressed as a pH, pH is a hydrogen ion concentration calculated as pH = -log [H + ], if the pH is too low, a large amount of hydrogen ions are present. Since the concentration of hydrogen ions in the pH range of 5 to 7 is similar to that of heavy metal ions, the complex formation reaction between heavy metals and low molecular weight organic acid ions in this range takes precedence over the reaction between hydrogen ions and low molecular weight organic acid ions. The heavy metal removal efficiency at the time can be said to be independent of the pH of the low molecular weight organic acid.
본 발명에 의한 중금속 오염토양의 정화방법은 이른바 토양세척공정(Soil Washing Process)을 구성하는 하나의 단위공정으로서 실제 적용되게 된다. 토양세척공정에서는 용출제를 이용하여 토양으로부터 중금속을 제거해내는 과정이외에도 다양한 공정의 수행이 수반됨이 일반적이다. 도 1은 중금속 오염토양을 정화하는 토양세척공정의 전형적인 일례를 도시한 것이다. 도 1에서 보는 바와 같이, 굴착된 오염토양은 우선 스크리닝(screening) 또는 크러싱(crushing) 등의 전처리단계(11)를 거친다. 상기 전처리를 통하여 조대입자가 걸러지고, 이어서 본 발명에 의한 혼합 및 용출단계(12)를 수행한다. 용출이 완료된 후에는 거친 입자를 분리(13)하여 이를 세척 및 탈수 등의 후처리단계(14)로 보내어 정화된 토양을 산출(111)한다. 한편, 상기 거친 입자분리단계에서 나온 소립자는 별도로 처리되어 용출제 재생단계(17)를 통해 잉여 시트르산을 회수(19)하는 한편, 중금속이 고농도로 함유된 처리슬러지(110)로 생산된다.The method of purifying heavy metal contaminated soil according to the present invention is actually applied as one unit process constituting a so-called soil washing process. In the soil washing process, in addition to removing heavy metals from the soil by using an eluent, it is generally accompanied by various processes. Figure 1 shows a typical example of a soil washing process for cleaning heavy metal contaminated soil. As shown in FIG. 1, the excavated contaminated soil is first subjected to a pretreatment step 11 such as screening or crushing. The coarse particles are filtered through the pretreatment, followed by the mixing and eluting step 12 according to the present invention. After the elution is completed, the coarse particles are separated (13) and sent to a post-treatment step (14), such as washing and dehydration, to calculate the purified soil (111). On the other hand, the small particles from the coarse particle separation step is processed separately to recover the excess citric acid (19) through the eluent regeneration step 17, while being produced as a treated sludge 110 containing a high concentration of heavy metals.
도 2는 오염토양내로 용출제를 투입하는 방법을 도시한 것이다. 도 2에서 보듯이, 투입방법은 지중주입식(21)과 살포식(22)으로 나뉘는데, 이는 오염지역의 특성에 따라 적당히 선택할 수 있다. 즉,공극률이 큰 토양의 경우에는 살포식이 적당하며, 그 외의 경우에는 지중주입식을 선택하는 것이 일반적이다. 도 2에서 23은 불포화 오염토양 지역을, 24 및 25는 각각 지하수면과 오염지하수를 나타낸다. 용출제는 상기 방법에 의해 지표면속 오염부분에 투입되어 중금속을 착화합물의 형태로 용출시키고, 이는 지하수(25)내로 흘러들어 지하수 회수정(26)을 통해 다시 지상으로 뽑아올려지게 된다. 지상으로 뽑아올려진 착화합물 형태의 중금속은 중금속 회수장치(27)를 통하면서 중금속과 용출제로 분리되게 된다.2 illustrates a method of injecting an eluent into contaminated soil. As shown in Figure 2, the input method is divided into underground injection (21) and spraying formula (22), which can be appropriately selected according to the characteristics of the contaminated area. That is, for soils with large porosity, the spraying method is appropriate, and in other cases, the ground injection type is generally selected. In Fig. 2, 23 represents an unsaturated contaminated soil area, and 24 and 25 represent groundwater and contaminated groundwater, respectively. The eluent is introduced into the contaminated portion of the surface by the above method to elute the heavy metal in the form of a complex compound, which flows into the groundwater 25 and is pulled back to the ground through the groundwater recovery well 26. Heavy metals in the form of complex compounds pulled up to the ground are separated into heavy metals and eluents through the heavy metal recovery device (27).
이하, 실시예 및 비교예를 통하여 본 발명에 의한 중금속 오염토양의 정화방법에 대하여 보다 상세히 설명하기로 한다. 단, 본 발명의 범위가 하기 실시예의 범위로 한정되지 않음은 물론이다.Hereinafter, the method for purifying heavy metal contaminated soil according to the present invention will be described in more detail with reference to Examples and Comparative Examples. However, it goes without saying that the scope of the present invention is not limited to the scope of the following examples.
한편, 본 발명에 의한 중금속 오염토양의 정화방법의 효과를 알아보기 위한 실험으로는 회분식(Batch type) 실험 및 연속식(Continuous type) 실험 모두 가능하다. 어느 경우에나 공히 투입되는 조성물중 저분자 유기산의 농도가 높을수록 중금속 용출에 소요되는 시간이 단축되는 경향을 보인다. 또한, 초기에는 중금속과 저분자 유기산과의 반응이 왕성하게 일어나서 H+이온을 생성하기 때문에 유출류의 pH가 떨어지지만 일정시간의 경과후에는 투입되는 저분자 유기산을 주성분으로 하는 조성물의 초기 pH값에 점진적으로 도달하게 된다. 도 3은 그러한 사실을 뒷받침하는 실제예로서, 투입되는 용출제로 시트르산을 사용한 결과를 나타내고 있다. X축은 공극부피를 나타내는 것으로서 시간의 경과에 따라 증가되는 유입 시트르산의 양을 의미하고, 한편 이에 대응하는 유출류내의 pH는 Y축상에 표시된다. 동그라미, 세모, 네모 및 다이아몬드형 점들은 각각 pH가 6.0, 4.5, 3.7 및 3.3일 때의 데이터를 나타내고 있다.On the other hand, as an experiment to determine the effect of the method for the purification of heavy metal contaminated soil according to the present invention, both batch type experiment and continuous type experiment are possible. In any case, the higher the concentration of the low molecular weight organic acid in the composition added together, the shorter the time required for elution of heavy metals. In addition, since the reaction between heavy metals and low molecular organic acids occurs in the early stages to generate H + ions, the pH of the effluent falls, but after a certain time, the initial pH value of the composition containing the low molecular organic acids introduced as a main component is gradually increased. Will be reached. FIG. 3 shows the results of using citric acid as an eluent added as a practical example supporting such a fact. The X axis represents the pore volume, which means the amount of inlet citric acid that increases over time, while the corresponding pH in the outflow is indicated on the Y axis. Circles, triangles, squares and diamond points represent data when the pH is 6.0, 4.5, 3.7 and 3.3, respectively.
한편, 토양컬럼 반응기를 이용하여 연속식(Continuous type) 실험을 수행하는 경우, 투입유량은 중금속 제거율에 거의 영향을 미치지 않는데, 도 4는 이러한 결과를 입증하고 있다. 즉, 도 4에서 X축은 도 1에서와 같이 공극부피를, 그리고 Y축은 납 제거율을 나타내고 있으며, 그래프상의 동그라미점은 유량이 1.0mL/min일때의 데이터를, 그리고 세모점은 유량이 0.1mL/min일 때의 데이터를 나타내고 있다. 두 개의 그래프가 거의 차이를 보이지 않음을 알 수 있다.On the other hand, when performing a continuous (Continuous type) experiment using a soil column reactor, the input flow rate has little effect on the heavy metal removal rate, Figure 4 demonstrates these results. That is, in FIG. 4, the X axis shows the void volume, and the Y axis shows the lead removal rate, the circle point on the graph shows data when the flow rate is 1.0 mL / min, and the triangle point shows the flow rate 0.1 mL /. The data at min is shown. It can be seen that the two graphs show little difference.
<실시예 1><Example 1>
pH가 5.5이고 농도가 10mM인 시트르산을 25mL 넣은 샘플을 준비하였다. 상기 샘플과 2.5g의 토양샘플을 함께 원심분리기에 넣은 다음, 25℃에서 250rpm의 회전속도로 24시간동안 회전진탕하여 회분식 실험을 수행하였다. 원심분리기로 분리한 상층액에 포함된 중금속 농도를 원자 흡수 측정기(Atomic Absorption Spectrometer)를 이용하여 측정하였다. 오염토양의 초기 중금속 함유량에 대해 제거된 중금속의 양을 백분율로 계산한 중금속 제거율을 표 1에 나타내었다.A sample prepared with 25 mL of citric acid having a pH of 5.5 and a concentration of 10 mM was prepared. The sample and the 2.5g soil sample were put together in a centrifuge and then subjected to a batch experiment by rotating and shaking for 24 hours at a rotational speed of 250 rpm at 25 ° C. The concentration of heavy metals contained in the supernatant separated by centrifugation was measured using an atomic absorption spectrometer. Table 1 shows the heavy metal removal rate calculated as a percentage of the amount of heavy metal removed relative to the initial heavy metal content of the contaminated soil.
<실시예 2 내지 6><Examples 2 to 6>
저분자 유기산의 종류, pH 및 농도를 표 1에서와 같이 변화시키는 것을 제외하고는, 실시예 1과 동일한 방법을 통하여 중금속 제거율을 계산하여 표 1에 나타내었다.Except for changing the type, pH and concentration of the low molecular weight organic acid as shown in Table 1, the heavy metal removal rate was calculated in the same manner as in Example 1 shown in Table 1.
<비교예 1 내지 10><Comparative Examples 1 to 10>
저분자 유기산의 종류, pH 및 농도를 표 1에서와 같이 변화시키는 것을 제외하고는, 실시예 1과 동일한 방법을 통하여 중금속 제거율을 계산하여 표 1에 나타내었다.Except for changing the type, pH and concentration of the low molecular weight organic acid as shown in Table 1, the heavy metal removal rate was calculated in the same manner as in Example 1 shown in Table 1.
상기 표 1에서 보듯이, 용출제의 종류, pH 및 농도를 실시예의 범위내로 조절한 본 발명에 의한 방법을 이용하는 경우, 중금속 제거율이 비교예의 경우에 비해 전반적으로 우수함을 확인할 수 있다.As shown in Table 1, when using the method according to the invention in which the type, pH and concentration of the eluent is adjusted within the range of the embodiment, it can be confirmed that the heavy metal removal rate is generally superior to the case of the comparative example.
중금속 탈착성이 우수한 특정 저분자 유기산을 포함하는 본 발명에 의한 조성물을 용출제로 사용하는 본 발명의 중금속 제거방법을 이용하면 다양한 종류 및 순도의 중금속으로 오염된 광범위한 토양으로부터 중금속을 효율적으로 제거할 수 있음은 물론, 상기 용출제용 조성물이 토양내에 존재하는 미생물에 의해 자연분해가 용이하므로 투입되는 조성물로 인한 2차적 오염을 최소화할 수 있다는 장점도 지닌다.The heavy metal removal method of the present invention using the composition according to the present invention containing a specific low molecular organic acid having excellent heavy metal desorbability as an eluent can efficiently remove heavy metals from a wide range of soils contaminated with heavy metals of various types and purity. Of course, since the composition for the eluent is easily decomposed by the microorganisms present in the soil, it also has the advantage of minimizing secondary contamination due to the composition introduced.
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|---|---|---|---|---|
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| CN103480641A (en) * | 2013-09-25 | 2014-01-01 | 中国农业科学院农田灌溉研究所 | Remediation method for soil contaminated by heavy metal |
| CN103586270A (en) * | 2013-11-08 | 2014-02-19 | 中国科学院红壤生态实验站 | Method for restoring heavy metal contaminated soil |
| CN104012353A (en) * | 2014-05-05 | 2014-09-03 | 湖南禾秀才生物科技有限公司 | Comprehensive fertilization technology for cultivating high-yield and high-quality super hybrid rice and repairing and improving farmlands contaminated by heavy metal |
| KR101548460B1 (en) * | 2014-05-16 | 2015-08-31 | 전북대학교산학협력단 | Soil washing solution composed of reducing and chelating agents and washing method using the same for remediation of arsenic contaminated soil |
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| CN104289504B (en) * | 2014-10-21 | 2016-03-30 | 武汉文科生态环境有限公司 | A comprehensive remediation method for heavy metal polluted soil |
| CN105057325B (en) * | 2015-07-14 | 2017-07-07 | 中国科学院沈阳应用生态研究所 | Heavy metal-polluted soil concentration and reparation suitability characterizing method based on Coordinate Conversion |
| CN105149337B (en) * | 2015-09-30 | 2017-11-21 | 湖南艾布鲁环保科技有限公司 | A kind of method of heavy metal cadmium arable soil reparation |
| CN106345415A (en) * | 2016-09-21 | 2017-01-25 | 安徽瀚景观规划设计院有限公司 | Montmorillonite-based soil conditioner and preparation method thereof |
| CN108213069A (en) * | 2018-01-04 | 2018-06-29 | 中冶华天工程技术有限公司 | Acid heavy metal contaminated soil remediation method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2057217C (en) * | 1990-12-11 | 1999-08-31 | Bruce Edward Holbein | A process for the decontamination of toxic, heavy-metal containing soils |
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1997
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100712657B1 (en) * | 2004-12-31 | 2007-05-02 | 광운대학교 산학협력단 | How to wash heavy metal contaminated soil |
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| KR100269160B1 (en) | 2000-10-16 |
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