scholarly journals Using undisturbed columns to predict long term behaviour of effluent irrigated soils under field conditions

Soil Research ◽  
2006 ◽  
Vol 44 (7) ◽  
pp. 661 ◽  
Author(s):  
L. Dawes ◽  
A. Goonetilleke
Keyword(s):  
Soil Column ◽  
Field Studies ◽  
Soil Characteristics ◽  
Sewage Effluent ◽  
Column Studies ◽  
Undisturbed Soil ◽  
Adequate Treatment ◽  
Wastewater Pollutants ◽  
Irrigated Soils

Soils have only a finite capacity for the removal of wastewater pollutants, and with time this capacity could decline. Not all soil types have the capacity to provide adequate treatment and dispersal of sewage effluent. For continued long-term application to be successful, it is essential that infiltration and drainage characteristics of soils do not decline. Also critical is how long-term application of nutrients and cations affects the soils and whether any leaching occurs. The research project described compares the outcomes of detailed field studies with results from an undisturbed soil column study where typical soils in the south-east region of Queensland, Australia, have been subjected to sewage effluent application over a period of 12 months. Multivariate analysis helped to classify the influential soil characteristics and to identify relative changes in each soil after the application of effluent. Identification and correlation of influential soil characteristics in field and accelerated column studies confirmed that undisturbed soil column studies can be useful in predicting long-term behaviour of effluent-irrigated soils.

scholarly journals Managed aquifer recharge: study of undisturbed soil column tests on the infiltration and treatment capacity using effluent of wastewater stabilization pond

RBRH ◽  
2018 ◽  
Vol 23 (0) ◽  
Author(s):  
Jaqueline Vígolo Coutinho ◽  
Cristiano das Neves Almeida ◽  
Eduardo Bernardo da Silva ◽  
Catalin Stefan ◽  
Gilson Barbosa Athayde Júnior ◽  
...  
Keyword(s):  
Soil Column ◽  
Managed Aquifer Recharge ◽  
Future Research ◽  
Sewage Effluent ◽  
Ammoniacal Nitrogen ◽  
Aquifer Recharge ◽  
Soil Columns ◽  
Undisturbed Soil ◽  
Coastal Watershed ◽  
Stabilization Pond

ABSTRACT Managed Aquifer Recharge (MAR) is a useful tool for the treatment and use of sewage effluent because it complements conventional treatment, recovers the aquifer and minimizes risk of saltwater intrusion. This study aims to investigate technical data to determine the treatment of wastewater stabilization pond effluent using undisturbed soil columns collected from a coastal watershed study area within the BRAMAR (BRAzil Managed Aquifer Recharge) project. The treatment efficiency was monitored by measuring physico-chemical parameters (BOD 5, COD, DOC, TSS, NH3 and NO3) in two columns filled with undisturbed sandy soil in which sewage effluent was infiltrated under unsaturated condition for 72 days with an average input flow of 10 mm h-1. Results indicated reduction greater than 60% of organic matter, suspended solids and ammoniacal nitrogen. However, high concentrations of nitrate in the outflow were detected originating from nitrification of ammoniacal nitrogen. Moreover, difficulties in relation to soil clogging were observed. Furthermore, this study brought relevant contributions to understanding the influence of the infiltration rate and ability to treat effluent from wastewater stabilization ponds using undisturbed soil columns. Future research should be undertaken to improve the pretreatment methods and the operation of a MAR system in the study area.

scholarly journals Pig Manure Application for Remediation of Mine Soils in Murcia Province, SE Spain

2008 ◽  
Vol 8 ◽  
pp. 819-827 ◽  
Author(s):  
A. Faz ◽  
D. M. Carmona ◽  
A. Zanuzzi ◽  
A. R. Mermut
Keyword(s):  
Field Experiments ◽  
Mine Drainage ◽  
Soil Column ◽  
Metal Mobility ◽  
Pig Manure ◽  
Soil Conditions ◽  
Mine Soils ◽  
Plant Establishment ◽  
Column Studies ◽  
Undisturbed Soil

In southern Spain, specifically in Murcia Province, an increased pig population causes large amounts of slurry production that creates a very serious environmental concern. Our aim was to use this waste to reduce the acid mine drainage process, heavy metal mobilization, and to improve soil conditions to enhance plant establishment in mine soils. Pig manure, sewage sludge, and lime were used as soil amendments in a field experiment and in undisturbed soil column. Field experiments showed an increase in pH, total nitrogen, organic carbon, and carbonate contents; a reduction of diethylene-tetramine pentaacetic acid (DTPA)– and water-extractable metals; and an improvement of plant establishment. The field studies showed that pig manure could be utilized to remediate polluted soils. Column studies in the laboratory showed that amendment of mine soil with pig manure initially increased soil pH from 2.21 to 6.34, promoted reduced conditions in the surface soil, and decreased the metal mobility. After 21 weeks, while the leachate was slightly acidic, however, the mobility of metals was substantially low. Additions of 7 and 14% of pig manure were insufficient to maintain a neutral pH in the leachate. Therefore, continuous application of the pig manure may be advised.

N2O emission and governing factors on arable fields

2020 ◽  
Author(s):  
Márton Dencső ◽  
Szandra Baklanov ◽  
Ágota Horel ◽  
Györgyi Gelybó ◽  
Eszter Tóth
Keyword(s):  
Soil Column ◽  
Field Measurements ◽  
N2o Emission ◽  
Column Experiments ◽  
Soil N ◽  
Undisturbed Soil ◽  
Arable Fields ◽  
Set Up ◽  
And Training

<p>This study focuses on the soil N<sub>2</sub>O emission of arable fields. We initially set up several soil column experiments in laboratory and based on these findings we started field measurements in a long term tillage experiment at Józsefmajor Experimental and Training Farm, Hungary. For the column experiments we collected undisturbed soil columns (d=10 cm, h=10 cm) from mouldboard ploughing (P) and no-till (NT) treatments.  We investigated the effect of different fertilizer doses (40, 80, 160, 240 kg h<sup>-1</sup> N), soil water content (SWC) and different tillage methods on soil N<sub>2</sub>O emission.</p><p>We found a nonlinear response of N<sub>2</sub>O emission on the applied fertilizer doses. The moderately fertilized (80-160 kg ha<sup>-1</sup> N) samples had the highest N<sub>2</sub>O emissions. Samples from NT had higher N<sub>2</sub>O emission than samples from P. We found better correlation between N<sub>2</sub>O emission and SWC in NT (R<sup>2</sup> is between 0.47 and 0.62) than in the P (R<sup>2</sup> is between 0.01 and 0.35).  The N<sub>2</sub>O emission values showed high spatial variability. The field measurements showed similar findings of N<sub>2</sub>O emission compared to the column experiments. In 2020 we intend to continue the field measurements and include further investigations of governing factors of soil N<sub>2</sub>O emission.</p>

Field Studies: Bringing Historical Records Down to Earth

2019 ◽  
pp. 34-47
Author(s):  
Emily W. B. Russell Southgate
Keyword(s):  
Aerial Photography ◽  
Field Studies ◽  
Soil Characteristics ◽  
Historical Records ◽  
Remote Imaging ◽  
The Past ◽  
Ground Survey ◽  
Wide Range ◽  
Over Time

There are many field techniques that take research beyond what can be found in written documents. Clues to the past are hidden in such subtle (and not so subtle) features as topographic modifications, soils, and tree trunks. Field studies search for evidence of conditions and for their resultant effects through a variety of techniques. Features may be evident from a ground survey, located precisely through GPS. Remote imaging, using a variety of techniques from simple aerial photography to lidar, reveal hidden patterns, that may then be studied on the ground. Archeological study relates the patterns found on the ground to human activities, as they have changed over time. Dendroecology interprets records left in tree rings. Some studies look at stands of different ages to study change over time, and long-term studies trace change in individual stands. In these field studies that look at the past, soil characteristics and materials hidden in the soil, such as DNA, stable isotopes and charcoal, can reveal details of past processes and species. These methods are illustrated with examples from a wide range of biomes.

Ixekizumab in the Management of Non-Selected Out Patients with Moderate to Severe Psoriasis -New Data and Personal Clinical Experience

2018 ◽  
Vol 3 (3) ◽  
Keyword(s):  
Clinical Experience ◽  
Personal Experience ◽  
Therapeutic Response ◽  
Systemic Disease ◽  
Severe Psoriasis ◽  
Adequate Treatment ◽  
Scalp Psoriasis ◽  
Number Of Patients ◽  
Genital Psoriasis

Introduction: Too many patients with moderate to severe psoriasis do not receive adequate treatment. This means a vast undersupply in the treatment of patients with psoriasis. Only biologics fulfill the whole range of the treatment of psoriasis – psoriasis does not affect only skin but the whole organism: It is a systemic disease! Between the biologics are evident differences concerning the effect. Discussion: Based on broad personal experience in the management of patients with moderate to severe psoriasis new data from clinical studies with ixekizumab are examined. This contains new data on long-term-efficacy of ixekizumab, effectiveness in special localizations (scalp psoriasis, nail psoriasis, palmoplantar psoriasis, genital psoriasis) as well as safely data and experience on patients switched to ixekizumab from other biologics. Personal clinical experience is based on >300 non-selected outpatients with moderate to severe psoriasis, >250 patients on biological therapies, > 50 patients with ixekizumab. Conclusions: Focusing on a relevant number of patients switched from secukinumab to ixekizumab due to first or secondary loss of efficacy significant differences between both IL-17A-inhibitors mainly in terms of efficacy and speed of therapeutic response are shown. Finally the correlation between PASI-90-/PASI-100 response and significant changes in DLQI are highlighted.

SELECTION WORK TO IMPROVE PRODUCTIVE AND BREWING QUALITIES OF SPRING BARLEY

1970 ◽  
pp. 38-40
Author(s):  
О. V. Levakova ◽  
L. М. Eroshenko ◽  
А. N. Eroshenko
Keyword(s):  
Protein Content ◽  
Spring Barley ◽  
Humus Content ◽  
Stability Index ◽  
Field Studies ◽  
Climatic Conditions ◽  
Extract Content ◽  
Labile Phosphorus ◽  
Loam Soil

The article presents and analyzes data of competitive varietal testing of promising varieties and lines of spring barley for yield and brewing qualities. Field studies were conducted in 2014–2017 on dark gray forest heavy loam soil. Agrochemical parameters are total nitrogen – 0.24%, humus content in a layer of 0-40 cm (according to Tyurin) – 5.19%, hydrolysis nitrogen – 123.5 mg / kg, salt extract pH – 4.92 mg-eq / 100g; labile phosphorus - 34.6 mg / 100g, labile potassium – 20.0 mg / 100g. The forerunner is winter wheat. Meteorological conditions in the years of research differed from each other and from the average long-term value. Barley samples were assessed by the protein content in the grain (GOST 10846-91), extract content (GOST 12130-77), weight 1000 grains (GOST 10842-89). Ecological plasticity was determined by the method proposed by E.D. Nettevich, A.I. Morgunov and M.I. Maksimenko, stability index (Ľ) by A. A. Gryaznov, indicator of stability level (Puss) by E. D. Nettevich and A. I. Morgunov. The main measure for assessing quality indicators is protein content. Many other biochemical and technological features of grain depend on its level. The experimental data convincingly testify to the significant influence of the soil and climatic conditions on the yield and, especially, on the brewing qualities of barley in the conditions of the Central Region of the Nonchernozem Zone. According to the studied traits, new valuable varieties Nadezhny, Sir, Noble and selection lines 141 / 1-09 h 746, 23 / 1-10 h 784, distinguished by high adaptability and resistance to adverse environmental factors, have been identified.

The Role of Ecopedological Parameters in Management Sustainability of Banat Lands

2018 ◽  
Vol 69 (3) ◽  
pp. 688-692
Author(s):  
Lucian Nita ◽  
Dorin Tarau ◽  
Gheorghe Rogobete ◽  
Simona Nita ◽  
Radu Bertici ◽  
...  
Keyword(s):  
Plant Nutrition ◽  
Physical State ◽  
Agricultural Land ◽  
Soil Characteristics ◽  
South West ◽  
Short And Long Term ◽  
Laboratory Investigations ◽  
Case Basis

The issue addressed relates to an area of 1891694 ha of which 1183343 ha are agricultural land (62, 56) located in the south-west of Romania and refer to the use of soil chemical and physical properties as an acceptor for certain crop systems, with minimal undesirable effects both for plants to be grown, as well as soil characteristics and groundwater surface quality. It is therefore necessary on a case-by-case basis, measure stoc or rect the acidic reaction by periodic or alkaline calculations, the improvement of plant nutrition conditions through ameliorative fertilization and the application of measures to improve the physical state, sufficient justification for the need to develop short and long term strategies for the protection and conservation of edifying factors and the need to respect the frequency of field and laboratory investigations at all 8x8 km grids of the National Soil-Grounds Monitoring System (organized by I.C.P.A.) and completing it with the relevant pedological and agrochemical studies.

scholarly journals Prognostic value of mitral regurgitation in patients with asymmetric hypertrophic cardiomyopathy

2021 ◽  
Vol 22 (Supplement_1) ◽  
Author(s):  
M Tesic ◽  
L Travica ◽  
V Giga ◽  
D Trifunovic ◽  
I Jovanovic ◽  
...  
Keyword(s):  
Hypertrophic Cardiomyopathy ◽  
Mitral Valve ◽  
Mitral Regurgitation ◽  
Prognostic Value ◽  
Volume Index ◽  
Common Finding ◽  
Adequate Treatment ◽  
Group 2 ◽  
Group 1

Abstract Funding Acknowledgements Type of funding sources: None. Introduction Since mitral regurgitation (MR) is a very common finding in patients with hypertrophic cardiomyopathy (HCM), the evaluation of the mitral valve anatomy and the degree of MR is of utmost importance in this population. However, data regarding the prognostic value of different degrees of MR in HCM remains scarce. Purpose The aim of this study was to determine whether the presence of a higher degree of MR affects: 1) long term prognosis; 2) clinical and echocardiographic presentation of HCM patients. Material and Methods We included prospectively 102 patients, diagnosed with primary asymmetric HCM. The degree of MR was determined echocardiographicaly according to current recommendations of the American Association of Echocardiography. According to the MR severity, patients were divided into 2 groups: Group 1 (n = 52) with no/trace or mild MR and Group 2 with moderate or moderate to severe MR. All patients had clinical and echocardiographic examination, 24-hour Holter ECG and NT pro BNP analysis performed. The primary outcome was a composite of: 1) HCM related death or sudden death; 2) hospitalization due to acute heart failure; 3) sustained ventricular tachycardia; 4) ischemic stroke. Results Patients with higher MR degree had more frequent chest pain (p = 0.039), syncope (p = 0.041) and NYHA II functional class (p < 0.001). Group 2 patients had mostly obstructive form of HCM (p < 0.001) with more frequent presence of previous atrial fibrillation (AF) (p = 0.032), as well as the new onset of AF (p = 0.014) compared to patients in Group 1. Patients with higher MR degree had significantly more SAM (p < 0.001) resulting in a more frequent eccentric MR jet (p < 0.001), along with calcified mitral annulus (p = 0.007), enlarged left atrial volume index (p < 0.001), and elevated right ventricular pressure (p = 0.001). As a result of higher MR grade, Group 2 had higher E/e" values (p < 0.001), elevated LV filling pressure (lateral E/e’ >10), as well as higher levels of NT pro BNP (p = 0.001). By Kaplan-Meier analysis we demonstrated that the event free survival rate during follow up of median 75 (IQR 48-103) months was significantly higher in Group 1 compared to the Group 2 (79% vs. 46%, p < 0.001), Figure 1. After adjustment for relevant confounders, moderate/moderate to severe MR remained as an independent predictor of adverse outcome (hazard ratio 2.58, 95% CI: 1.08-6.13, p < 0.001). Conclusion Presence of moderate, or moderate to severe MR was associated with poor long-term outcome of HCM patients. These results indicate the importance of an adequate MR assessment and detailed evaluation of the mitral valve anatomy in the prediction of complications and adequate treatment of patients with HCM. Abstract Figure.

Long-Term Outcomes of Patients with Hydrocephalus Secondary to Tectal Plate Glioma versus Idiopathic Aqueductal Stenosis: Results from a Single Center

2021 ◽  
pp. 1-11
Author(s):  
Hamid Reza Niknejad ◽  
Melissa Frederickx ◽  
Emiel Salaets ◽  
Jurgen Lemiere ◽  
Lieven Lagae ◽  
...  
Keyword(s):  
Aqueductal Stenosis ◽  
Maximum Diameter ◽  
Benign Tumors ◽  
Term Outcome ◽  
Adequate Treatment ◽  
Long Term Outcome ◽  
Tectal Plate ◽  
The Mean

<b><i>Introduction:</i></b> Tectal plate gliomas (TPG) constitute a distinct entity of benign tumors of the brain stem which show an indolent clinical course. Adequate treatment of secondary hydrocephalus is undoubtedly a major factor in the outcome. However, little is known about to what degree the tumor itself determines the long-term outcome of these patients. <b><i>Methods:</i></b> We retrospectively analyzed and compared the clinical and radiological data of 16 pediatric TPG patients with data of 12 pediatric idiopathic aqueductal stenosis (IAS) patients treated in our center from 1988 to 2018. For both groups, we assessed the long-term outcome in terms of hydrocephalus management, and for the TPG group, we assessed tumor growth during follow-up. In a separate prospective part of the study, we performed a neuropsychological evaluation in a subgroup of patients using a standardized testing battery, covering intelligence, learning, memory, executive functions, and an inventory on depression. <b><i>Results:</i></b> In the TPG group, the mean clinical and radiological follow-up was 84 and 70 months, respectively. On average, the maximum diameter of the tumor increased by 11% (<i>p</i> = 0.031) and the estimated tumor volume with 35% (<i>p</i> = 0.026) on radiological follow-up. The fronto-occipital horn ratio (FOHR) decreased by 23% on average after treatment. In the IAS group, the mean clinical and radiological follow-up was 117 and 85 months, respectively. In this group, the FOHR decreased by 21% on average. Neurocognitive testing revealed significant higher scores in the TPG group on global intelligence (TPG = 109, IAS = 85.5, <i>U</i> = 3, <i>p</i> &#x3c; 0.01, <i>z</i> = −2.71), performance (TPG= 100, IAS = 85, <i>U</i> = 7, <i>p</i> = 0.03, <i>z</i> = −2.2), and verbal intelligence (TPG = 122, IAS = 91.5, <i>U</i> = 2, <i>p</i> &#x3c; 0.00, <i>z</i> = −2.87) as well as working memory (TPG = 109.5, IAS = 77, <i>U</i> = 0.5, <i>p</i> = 0.01, <i>z</i> = −2.46). <b><i>Conclusion:</i></b> Our results suggest that the long-term outcome in TPG patients is acceptable and that cognition is substantially better preserved than in patients with IAS. This puts the idea of a significant contribution of the tumoral mass to disease outcome on the long term in question. Adequate and prompt management of hydrocephalus is the most important factor in long-term cognitive outcome.

scholarly journals Biogeochemical Controls on the Potential for Long-Term Contaminant Leaching from Soils Developing on Historic Coal Mine Spoil

Soil Systems ◽  
2020 ◽  
Vol 5 (1) ◽  
pp. 3
Author(s):  
David Singer ◽  
Elizabeth Herndon ◽  
Laura Zemanek ◽  
Kortney Cole ◽  
Tyler Sanda ◽  
...  
Keyword(s):  
Coal Mine ◽  
Solid Phase ◽  
Microbial Community Composition ◽  
Toxic Metal ◽  
Soil Formation ◽  
Mineral Weathering ◽  
Mine Spoil ◽  
Secondary Phases ◽  
Undisturbed Soil

Coal mine spoil is widespread in US coal mining regions, and the potential long-term leaching of toxic metal(loid)s is a significant and underappreciated issue. This study aimed to determine the flux of contaminants from historic mine coal spoil at a field site located in Appalachian Ohio (USA) and link pore water composition and solid-phase composition to the weathering reaction stages within the soils. The overall mineralogical and microbial community composition indicates that despite very different soil formation pathways, soils developing on historic coal mine spoil and an undisturbed soil are currently dominated by similar mineral weathering reactions. Both soils contained pyrite coated with clays and secondary oxide minerals. However, mine spoil soil contained abundant residual coal, with abundant Fe- and Mn- (oxy)hydroxides. These secondary phases likely control and mitigate trace metal (Cu, Ni, and Zn) transport from the soils. While Mn was highly mobile in Mn-enriched soils, Fe and Al mobility may be more controlled by dissolved organic carbon dynamics than mineral abundance. There is also likely an underappreciated risk of Mn transport from coal mine spoil, and that mine spoil soils could become a major source of metals if local biogeochemical conditions change.

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