• Title/Summary/Keyword: 황산칼슘비료

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Transfer of Arsenic and Mercury from Stabilized Farmland Soil to Lettuce using Calcium Sulfate Fertilizer with Different Physical Properties as a Stabilizing Agent (안정화제로 사용된 황산칼슘비료의 물리적 형태에 따른 토양 비소 및 수은의 안정화와 식물체 전이특성)

  • Il-Ha Koh;Yo Seb Kwon;Min-Hyeon Lee;Jung-Eun Kim;So-Young Park;Ju In Ko;Won Hyun Ji
    • Economic and Environmental Geology
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    • v.56 no.5
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    • pp.619-628
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    • 2023
  • In this study, we investigated the feasibility of calcium sulfate fertilizer as a stabilizing agent for As and Hg contaminated farmland soil and its stabilization characteristics in 3 different physical forms (particulate, powder, and solution) through a pot experiment including 34 days of lettuce growth. As and Hg contents of the lettuce grown in the stabilized soils were decreased by at least 70%. However the lettuce yield of the soil stabilized with the solution agent was decreased by 46% due to the overabundance of the nutrients from the solution agent. Thus, if a solution-type agent is planned for agricultural farmland soil stabilization, additional tests for optimal dosage are needed to preserve vegetation growth. In Hg fractionation, a lower concentration of elemental fractions and a higher concentration of residual/sulfide fractions were identified in the soils stabilized with the solution, powder, and pariculate agents in descending order while there were no significant changes in As fractionation. Overall results suggest that calcium sulfate fertilizer can be used as a stabilizing agent, and a solution-type agent could be used when the operation of heavy machinery for the soil stabilization process is impossible.

Nickel recovery and phosphorus removal from spent electroless Nickel-plating solution (무전해 니켈도금 폐액으로부터 니켈회수와 인의 제거방법)

  • Kim, Yu-Sang;Jeong, Gwang-Mi
    • Proceedings of the Korean Institute of Surface Engineering Conference
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    • 2015.11a
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    • pp.312-313
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    • 2015
  • 무전해 도금은 석출응력이 낮고 작업하기가 용이하기 때문에 산업분야에 있어서 중요한 역할을 한다. 무전해 도금 공정에 있어서, 니켈금속은 차아인산염, 아미노보레인 혹은 수소화붕소 화합물($HBF_4$)에 의한 니켈이온의 화학적 환원에 의해 도금된다. 환원반응이 진행함에 따라서 도금액 중에서 니켈과 차아인산염 이온은 감소한다. 이에 이러한 이온을 보충하기 위하여 도금액 중에 황산니켈과 차아인산나트륨이 일반적으로 첨가된다. 하지만 축적된 인산염, 황산염, 나트륨과 이외의 물질이 전착 박막의 품질을 떨어뜨리고 도금액은 폐기되기도 한다. 니켈회수 속도는 종래의 50% 이하였던 것이 90%이상으로 향상되었다. 이온교환법은 니켈도금 폐액으로부터 니켈회수에 필요한 친환경적이고 원가절감의 기술이라고 사료된다. 특히, 갈탄이 저렴하고 양이온 교환성능이 뛰어나다. 이유는 -COOH, -OH 등의 기능성 그룹을 갖기 때문이다. Fe-P 화합물은 식물에 유용하지 못하고 마그네슘과 칼슘 기반의 석출물은 저렴하고 취급이 용이하며 비료와 같이 재활용이 가능하기 때문에 일반적인 인의 제거 수단이 될 수 있다. 본고에서는 니켈도금 폐액으로부터 인을 제거하는 데 $Ca(OH)_2$, $CaCl_2$$CaCO_3$를 채택하여 인이 제거되는 정도를 비교하였고 니켈회수율을 높이기 위하여 갈탄을 사용하였다.

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Growth and Nutrients Uptake as Affected by Ammonium sulfate and Urea in the Paddy Rice (황산암모니아 및 요소의 시용이 수도의 생육과 양분 흡수에 미치는 영향)

  • ;Eun-Woong Lee
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.28 no.4
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    • pp.391-418
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    • 1983
  • Urea and ammonium sulfate without and with sulfur group, respectively, were compared with respect to their nutritive effects on the rice plants, Suweon 264 and Jinheung, under the nursery trial on the protected upland and lowland seedbed, the pot trials with their various combination ratios and with added sodium sulfate to urea and the trials on the paddy fields which have undergone urea and ammonium sulfate application for many years. The rice seedlings fertilized with ammonium sulfate surpassed those with urea in growth performance and nutrients absorption of the rice seedlings at nursery period. Such stimulating effect of ammonium sulfate on the growth and nutrients uptake was more remarkable under the upland nursery than under the lowland one. The pot trial with the various combination ratios of urea and ammonium sulfate revealed that the chlorophyll content in leaf blade increased with the increment of sulfate ratio in the combination and the sole application of urea caused the chlorosis of leaf which was more conspicuous in Suweon 264 than in Jinheung. Fertilized with the same active ingradient amount of nitrogen, the rice plants supplied with ammonium sulfate surpassed those with urea in the chlorophyll content consistently under the nursery, the pot and the paddy field trials. The photosynthesis of flag leaf at heading stage increased with the combination rate of ammonium sulfate in the pot trial. The sulfur applicated as supplementary element of nitrogen in the nursery, the pot and the field trials were observed to be in positive relationship to the nitrogen and potassium content, but to be in negative correlation to the calcium content. The sulfur content in the rice plants was higher at early growth stage and decreased with the advance in growth stage. The nitrogen content also showed a similiar tendency to the sulfur content, and the N/S ratio was higher at early growth stage than at later one. The N/S ratio was negatively correlated with the chlorophyll content. In the field experiment, ammonium sulfate surpassed urea in the number of productive tiller, dry matter production and unhulled rice yields, but much stimulating effect of ammonium sulfate on the grain production was shown to be less effective than that on the straw production. The nitrogen and major nutrients content in the rice straw at harvest were higher in the paddy field with long-term ammonium sulfate application than in that with long-term urea application, suggesting that the former might have greater potentiality in nutrients supply than the latter.

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Effects of Lime, Magnesium Sulfate, and Compound Fertilizers on Soil Chemical Properties of Acidified Forest Soils (산성화(酸性化)된 산림토양(山林土壤)에 석회(石灰), 황산고토(黃酸苦土) 및 복합비료(複合肥料) 시비(施肥)가 토양(土壤)의 화학적(化學的) 성질(性質)에 미치는 영향(影響))

  • Yoo, Jeong-Hwan;Byun, Jae-Kyoung;Kim, Choonsig;Lee, Choong Hwa;Kim, Young-Kul;Lee, Won-Kyu
    • Journal of Korean Society of Forest Science
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    • v.87 no.3
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    • pp.341-346
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    • 1998
  • The effects of CaO, $CaO+MgSO_4$, and $CaO+MgSO_4$+compound fertilizers(NPK) on soil chemical properties of acidified forest soils were studied in Quercus spp. and Pinus rigida stands in Mt. Namsan and Mt. Surak in urban areas, and Kwangnung in a mountain area. The soil samples were collected in November 1995 after every year fertilization from November 1991 through April 1995. The fertilizations affected soil chemical properties. Soil pH increased after fertilizations compared with control. However, the effect was different between the stand types and the areas. Organic matter and total nitrogen content were not changed, while exchangable cations such as calcium and magnesium increased after fertilizations. However, these ration concentrations after fertilizer treatments were lower in P. rigida than in Quercus spp. stands. These rations also showed increased leaching characteristics more in the urban area than in the mountain area.

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Effect of Inoculation with Bradyrhizobium sp. and Lime Types on Peanut Plant at Newly Reclaimed Area II. Nutritional Content in Seed (야산개간지(野山開墾地)에서 근류균(根瘤菌) 접종(接種) 및 석회(石灰) 비종별(肥種別) 시용(施用)이 땅콩 생육(生育)에 미치는 영향(影響) II. 종실(種實)의 양분함량(養分含量))

  • Lee, Deog-Bae;Choi, Song-Yeol;Kwon, Ta-Oh;Im, Geon-Jae;So, Jae-Don
    • Korean Journal of Soil Science and Fertilizer
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    • v.24 no.4
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    • pp.286-292
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    • 1991
  • This study was carried out to investigate in influence of inoculation B. sp. and lime types on nutrient content of peanut seed, and the correlation between nutritient contents in seed and plant. 1. Inoculated B. sp., content of crude protein, phenylalanine, isoleucine, cystine, histidine, aspartic acid, serine, and alanine in seed were increased significantly, but that of crude fat was decreased. 2. The content of crude fat was the highest without lime, glutamic acid was the highest with calcium sulfate, valine, phenylalanine, isoleucine, leucine, lysine, aspartic acid, serine, glycine and alanine with slaked lime, and histidine with calcium carbonate. 3. The content of crude protein in seed was negatively correlated with that of crude fat. The contents of chlorophyll, allantoin, ammonia, free amino acid, T-N, $P_2O_5$, and CaO in leaf at 100 days after sowing were positively correlated with the content of crude protein and various kinds of amino acid in seed, but negatively with the content of crude fat. The content of nitrate in leaf at 100 days after sowing showed the result of contrary tendency.

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Salt Accumulation and Desalinization of Rainfall Interception Culture Soils of Rubus sp. in Gochang-gun, Jeollabuk-do (복분자 비가림 하우스 토양 중 염류집적 요인과 물리적 제염효과)

  • Chung, Byung-Yeoup;Lee, Kang-Soo;Kim, Myung-Kon;Choi, Young-Hee;Kim, Moo-Key;Cho, Jae-Young
    • Korean Journal of Soil Science and Fertilizer
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    • v.41 no.5
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    • pp.310-317
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    • 2008
  • This study was carried out to investigate the factors of desalinization of the rainfall interception culture soils of Rubus sp. in Gochang-gun, Jeollabuk-do. Soil samples were collected from 85 different sites of the rainfall interception culture soils of Rubus sp. in Gochang-gun, Jeollabuk-do. The electrical conductivity in paste saturation of rainfall interception culture soils ranged from $1.0\sim28.4dS\;m^{-1}$ (average: $4.8dS\;m^{-1}$) and salt affected soil which EC was higher than $4dS\;m^{-1}$, covered nearly 55% of all field surveyed. Salts in rainfall interception culture soils were accumulated by increasing the cultivation period. Electrical conductivity in rainfall interception culture soils was positively correlated with water soluble anions such as chloride ion ($r=0.85^{**}$), nitrate ion ($r=0.94^{**}$), phosphate ion ($r=0.88^{**}$), and sulfate ion ($r=0.84^{**}$), respectively. As a result of desalinization experiments carried out by water management practices, the rinsing method was more effective than leaching method.

Physico-Chemical Properties of Rainfall Interception Culture and Open Field Culture Soils of Rubus sp. In Gochang-gun, Jeollabuk-do (고창지역 복분자 비가림하우스 토양과 노지토양의 물리·화학적 특성)

  • Chung, Byung-Yeoup;Lee, Kang-Soo;Kim, Myung-Kon;Choi, Young-Hee;Kim, Moo-Key;Cho, Jae-Young
    • Korean Journal of Soil Science and Fertilizer
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    • v.41 no.5
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    • pp.303-309
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    • 2008
  • The physico-chemical properties of the rainfall interception culture (85 sites) and the open field culture soils (85 sites) in the area of Gochang-gun, Jeollabuk-do were surveyed. Soil textural distribution of the rainfall interception culture and the open field culture soils was 74% and 64% for silt loam, 16% and 35% for loam, and 10% and 1% for clay, respectively. The percentage of aggregate rates was higher in the open field culture soils (60.06%) than rainfall interception culture soils (55.84%). Electrical conductivity, exchangeable cations, and anions in the rainfall interception culture soils were higher than those in open field soils. Specially, accumulated amount of anion in rainfall interception culture soils was remarkably higher 2~3 times than open field culture soils. The results from the analyses of rainfall interception culture soils suggested that the most critical problem is the salts accumulation caused by over-fertilization of chemical fertilizer and compost. Therefore, application rates of chemical fertilizer and compost should be controlled in order to conservation of soil and water for sustainable agriculture.