폐금속광산 산성토양에서 폐석회/굴패각을 이용한 토양중화제 처리가 소나무 묘목 및 초본 생육에 미치는 영향

정문호,지원현 한국자원공학회 2021 한국자원공학회지 Vol.58 No.6

The objective of this study was to select a proper mixing ratio of soil neutralizer (waste-lime and oyster mix) by assessing treatment effect on the root collar diameter (RCD) growth of Pinus densiflora seedlings, the inflow of herbaceous vegetation from the forest edge, and soil characteristics in the acid soil of abandoned metal mines to increase carbon uptake. The mixing ratios of the soil neutralizer were 0.6%, 1.0%, 1.2%, and 1.6% in comparison with the soil weight. All soil neutralizer treatments promoted RCD growth and survival of P. densiflora seedlings and the inflow of herbaceous vegetation from the forest edge. In addition, soil pH was improved by the soil neutralizer treatment. Treatment with 1.6% soil neutralizer resulted in increased RCD growth of P. densiflora seedlings, total population of herbaceous plants from around the forest, TOC, and total N. In this study, the mixing ratio showed a positive correlation with RCD growth and survival of P. densiflora seedlings, the inflow of herbaceous vegetation, soil pH, and TOC. The results of this study indicated that treatment with soil neutralizer at a ratio of 1.6% is applicable for rehabilitation in this abandoned metal mine considering the growth of P. densiflora seedlings and herbaceous vegetation, soil chemical characteristics, and economic feasibility. However, it is necessary to conduct field experiments to select a proper mixing ratio of soil neutralizers to apply in other abandoned metal mines. 본 연구는 폐금속광산 산성토양에서 탄소흡수량 증가를 위해 폐석회와 굴패각을 혼합한 토양중화제가 소나무 묘목 근원경 생장과 주변 산림으로부터의 초본 유입 및 토양특성에 미치는 영향을 평가하여 토양중화제의 적정 혼합비율을 선정하기 위해 수행되었다. 토양중화제 혼합비율은 토양중량대비 0.6%, 1.0%, 1.2%, 1.6%였다. 모든 중화제 처리구의 혼합비율에서 소나무 묘목의 근원경 생장과 초본 유입이 촉진되었다. 또한, 토양 pH가 중화제 처리에 따라 개선되었다. 1.6% 처리구가 소나무 묘목 근원경 생장량과 주변 산림에서 유입된 초본의 총개체수, 토양내 TOC와 총질소 함량이 다른 처리구에 비해 높았다. 본 연구에서 중화제 혼합비율은 소나무 묘목의 근원경 생장량과 생존률, 주변 산림으로부터 초본 유입과 토양 pH, TOC 함량과 정의 상관관계를 보였다. 이러한 결과로 폐금속광산에서 소나무 묘목과 초본 생육, 토양 화학적 특성, 중화제 비율에 따른 경제성 등을 고려할 때, 본 연구 대상지인 폐금속광산에서 산림복구를 위해 1.6% 처리가 적합하다. 하지만 다른 폐금속광산에 토양 중화제를 적용하기 위해서는 현장실험을 통해 적정 중화제 혼합비율을 선정해야 한다.

폐광산지역 토양 식생복원 과정 내 토양특성 및 미생물 군집 변화 분석

박민정,윤민호,남인현,Park, Min-Jeong,Yoon, Min-Ho,Nam, In-Hyun 한국지하수토양환경학회 2015 지하수토양환경 Vol.20 No.3

Mine soil contamination by high levels of metal ions that prevents the successful vegetation poses a serious problem. In the study presented here, we used the microbial biocatalyst of urease producing bacterium Sporosarcina pasteurii or plant extract based BioNeutro-GEM (BNG) agent. The ability of the biocatalysts to bioremediate contaminated soil from abandoned mine was examined by solid-state composting vegetation under field conditions. Treatment of mine soil with the 2 biocatalysts for 5 months resulted in pH increase and electric conductivity reduction compared to untreated control. Further analyses revealed that the microbial catalysts also promoted the root and shoot growth to the untreated control during the vegetation treatments. After the Sporosarcina pasteurii or plant extract based BNG treatment, the microbial community change was monitored by culture-independent pyrosequencing. These results demonstrate that the microbial biocatalysts could potentially be used in the soil bioremediation from mine-impacted area.

산청군 고령토 광산 복원지와 인접 소나무 임분의 토양양분 저장량 및 잎 양분 농도 비교

김경태,김춘식 한국산림과학회 2022 한국산림과학회지 Vol.111 No.2

We performed this study to determine the foliar nutrient concentration and the nutrient stocks of restoration areas and adjacent Pinus densiflora S. et. Z. (red pine) stands in opencast kaolinite mines in Sancheong-gun, Gyeongsangnam-do, southern Korea. We chose six sites to determine foliage nutrient concentrations and the nutrient stocks of soils (0-10 cm depth). The dominant vegetation planted in restoration areas comprised Quercus acutissima Carruth., P. koraiensis S. et. Z., Festuca arundinacea Schreb., and Lespedeza cuneata G. Don. Invading vegetation in the restoration areas comprised Alnus incana (L.) Medik., Robinia pseudoacacia L., and Lespedeza spp., among others. The carbon and nitrogen stocks at 10 cm soil depth were significantly higher in the red pine stands than those in the restoration areas, whereas those of phosphorus, potassium, and magnesium were not significantly different between the two areas. However, calcium stocks were significantly higher in the restoration areas than in the red pine stands. Nitrogen concentration in foliage was higher in L. cuneata (20.28 mg N g-1) than that in F. arundinacea (5.67 mg N g-1), whereas potassium concentration was twice as high in F. arundinacea (18.8 mg K g-1) as that in L. cuneata (9.07 mg K g-1). Foliar nitrogen concentrations in invasive vegetation such as A. incana, R. pseudoacacia, and Lespedeza spp. were twice or four times higher than those of Q. acutissima and P. koraiensis. Our results indicate the development of suitable vegetation and soil amendment treatments to improve poor soil environmental conditions in restoration areas are necessary following opencast kaolinite mining. 본 연구는 고령토 광산 식생 복원지와 인접 소나무 임분을 대상으로 토양양분 저장량을 비교하고 복원지 식생의 잎 양분 농도와 토양 특성과의 관계를 조사하였다. 경상남도 산청군에 위치한 고령토 광산은 복원 식생으로 목본은 상수리 나무와 잣나무, 초본은 큰김의털과 비수리가 식재 또는 파종되었다. 한편, 일부 식생 복원지는 인접 산림으로부터 유입된 물오리나무, 아까시나무, 싸리류 등이 침입 식생으로 분포하였다. 토양 0∼10 cm 깊이의 탄소 및 질소 저장량은 소나무 임 분이 식생 복원지에 비해 유의적으로 높았으나(P < 0.05), 인, 포타슘, 마그네슘 저장량은 유의적인 차이가 없었으며, 칼슘 저장량은 식생 복원지가 높게 나타났다. 식생 복원지에 조성된 비수리 잎 내 질소 농도는 20.28 mg N g-1로 큰김의털 5.67 mg N g-1에 비해 약 3배 정도 높았으나, 포타슘 농도는 비수리가 9.07 mg K g-1로 큰김의털 18.8 mg K g-1에 비해 약 2배 정도 낮았다. 침입 식생인 물오리나무, 싸리류, 아까시나무는 잣나무나 상수리나무 같은 식재 수종에 비해 잎 내 질소 농도 가 2∼4배 정도 높게 나타났다. 본 연구에 따르면 고령토 광산 식생 복원지의 열악한 토양 특성을 고려할 때 복원 수종으 로 질소고정식물을 식재하거나 파종하고 토양 비옥도를 향상할 수 있는 산림 사업이 필요한 것으로 나타났다.

광해복원 경사지 밭의 토양유실 평가를 위한 현장실험- 화학적 성질과 경사도 조건에서 -

윤성욱,유찬,강희천,권요셉,고일하,정문호 한국농공학회 2022 한국농공학회논문집 Vol.64 No.2

In-situ pilot experiment was carried out to establish a countermeasure on the soil loss from the hill side uplands that was rehabilitated by soilremediation method nearby abandoned mine sites for 2 years. It was considered that the affect of an inclination of cover surface, a stabilization treatmentof cover layer by lime and steel refining slag (SRS) and a vegetation of soil surface as an effect factors in the experiment. It was constructed 4lysimeters (plots, 22 m long, 4 m width) on the hilly side (37% inclination). One plot was control and two plots was treated by 1% lime and S RS . A remind one plot was modified a inclination to 27% to compare the affect of inclination on the amount of cover soil loss. It was attached a reserviortank and water level gauge in the end of lysimeters to measure the amount of the surface water flow and soil loss. It was also installed the automatedsensors that could be collect the precipitation, soil moisture content, tension of cover layer in each plots. It was observed that the event of precipitationwere caused the soil loss and it were related the physical and chemical properties of cover soil and inclination of surface layer of plots. During theexperiment, it was exceeded the national regulation (50 t/ha/yr) in 37% inclination plots even though it was vegetated on the cover soil surface. However, in 27% inclination plot, it was shown that the amount of soil loss was maintained below the national regulation and, more ever, vegetationcould reduce the the amount of soil loss. Therefore it was expected that such results could be applied to the future design of rehabilitation projectson the polluted farmland nearby abandoned mine sites.

강원도 석탄 폐광지 주변 폐석더미에서 복토와 식생기반재 처리가 소나무(Pinus densiflora Siebold & Zucc.) 와 참싸리 (Lespedeza cyrtobottrya Miq.)의 경쟁에 미치는 영향

이궁 ( Koong Yi ),임주훈 ( Joo Hoon Lim ),김정환 ( Jeong Hwan Kim ),이임균 ( Im Kyub Lee ),정용호 ( Yong Ho Jeong ) 한국환경복원기술학회 2013 한국환경복원기술학회지 Vol.16 No.1

This study was conducted to evaluate the effect of soil covering depth and vegetation base materials on the competition between Pinus densiflora Siebold & Zucc. and Lespedeza cyrtobotrya Miq., which were grown in an abandoned coal mine land for three years after seeding, by comparing their growth and stein density. The study site was consisted of sub-plots with four different soil covering depths (0cm, 10cm, 20cm, and 30cm) and four different compounds of vegetation base materials (peat moss (control), soil conditioner+peat moss (S+P), erosion control material+peat moss (E+P), and soil conditioner+erosion control material+peat moss (S+E+P)). Results of this study showed opposite pattern between P. densiflora and L. cyrtobotrya with different soil covering depth and compounds of vegetation base materials in general. P. densiflora showed the highest growth and stem density in plots with 10cm and 0cm depths of soil covering, respectively, while the lowest was shown in plots with 20cm depth of soil covering. In contrast, L cyriobotrya showed the highest growth and stem density in plots with 20cm depth of soil covering, while the loweSt was shown in plots with 0cm depth of soil covering. In case of vegetation base materials, P. densflora showed the highest growth and stem density in control plots and plots treated with S+P, respectively, while the lowest was shown in plots with S+E+P treatment. On the other hand, L cyrtobotrva showed the highest growth and stem density in plots treated with S+E+P, while the lowest was shown in control plots. These results suggested the competition between two plants as a major cause of opposite patterns, which is induced by the suppressed growth and stem density of P. densiflora by fast growing L cyrtobotrya. Despite the suppression of L cyrtobotrya on P. densiflora, L. cyrtobotrya can play a positive role in improving soil quality, and thus it would be more desirable for restoring abandoned coal mine land to manage the growth of L cyrtobotrya periodically, rather than eliminate them.