The effect of a sandy soil amendment with municipal solid waste (MSW) compost on nitrogen uptake efficiency by plants

AbstractIn the present study, reactive red 198 (RR198) dye removal from aqueous solutions by adsorption using municipal solid waste (MSW) compost ash was investigated in batch mode. SEM, XRF, XRD, and BET/BJH analyses were used to characterize MSW compost ash. CNHS and organic matter content analyses showed a low percentage of carbon and organic matter to be incorporated in MSW compost ash. The design of adsorption experiments was performed by Box–Behnken design (BBD), and process variables were modeled and optimized using Box–Behnken design-response surface methodology (BBD-RSM) and genetic algorithm-artificial neural network (GA-ANN). BBD-RSM approach disclosed that a quadratic polynomial model fitted well to the experimental data (F-value = 94.596 and R2 = 0.9436), and ANN suggested a three-layer model with test-R2 = 0.9832, the structure of 4-8-1, and learning algorithm type of Levenberg–Marquardt backpropagation. The same optimization results were suggested by BBD-RSM and GA-ANN approaches so that the optimum conditions for RR198 absorption was observed at pH = 3, operating time = 80 min, RR198 = 20 mg L−1 and MSW compost ash dosage = 2 g L−1. The adsorption behavior was appropriately described by Freundlich isotherm, pseudo-second-order kinetic model. Further, the data were found to be better described with the nonlinear when compared to the linear form of these equations. Also, the thermodynamic study revealed the spontaneous and exothermic nature of the adsorption process. In relation to the reuse, a 12.1% reduction in the adsorption efficiency was seen after five successive cycles. The present study showed that MSW compost ash as an economical, reusable, and efficient adsorbent would be desirable for application in the adsorption process to dye wastewater treatment, and both BBD-RSM and GA-ANN approaches are highly potential methods in adsorption modeling and optimization study of the adsorption process. The present work also provides preliminary information, which is helpful for developing the adsorption process on an industrial scale.

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Comparison of the methane oxidation rate in four media

Revista Brasileira de Ciência do Solo ◽

10.1590/s0100-06832012000300011 ◽

2012 ◽

Vol 36 (3) ◽

pp. 803-812 ◽

Cited By ~ 9

Author(s):

Juliana Lundgren Rose ◽

Cláudio Fernando Mahler ◽

Ronaldo Luis dos Santos Izzo

Keyword(s):

Municipal Solid Waste ◽

Greenhouse Gas ◽

Solid Waste ◽

Oxidation Rate ◽

Oxidative Capacity ◽

Attractive Alternative ◽

Cost Ratio ◽

Internal Diameter ◽

Gas Emissions ◽

Msw Compost

Landfill gas emissions are one of the main sources of anthropogenic methane (CH4), a major greenhouse gas. In this paper, an economically attractive alternative to minimize greenhouse gas emissions from municipal solid waste landfills was sought. This alternative consists in special biofilters as landfill covers with oxidative capacity in the presence of CH4. To improve the quality/cost ratio of the project, compost was chosen as one of the cover substrates and soil (Typic red yellow-silt-clay Podzolic) as the other. The performance of four substrates was studied in laboratory experiments: municipal solid waste (MSW) compost, soil, and two soil-compost at different proportions. This study aimed to evaluate the suitability and environmental compatibility as a means of CH4 oxidation in biofilters. Four biofilters were constructed in 60 cm PVC tubes with an internal diameter of 10 cm. Each filter contained 2.3 L of oxidizing substrate at the beginning of the experiment. The gas used was a mixture of CH4 and air introduced at the bottom of each biofilter, at a flow of 150 mL min-1, by a flow meter. One hundred days after the beginning of the experiment, the best biofilter was the MSW compost with an oxidation rate of 990 g m-3 day-1 , corresponding to an efficiency of 44 %. It can be concluded that the four substrates studied have satisfactory oxidative capacity, and the substrates can be used advantageously as cover substrate of MSW landfills.

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Effects of 15N application frequency on nitrogen uptake efficiency in Citrus trees

Journal of Plant Physiology ◽

10.1078/0176-1617-01018 ◽

2003 ◽

Vol 160 (12) ◽

pp. 1429-1434 ◽

Cited By ~ 20

Author(s):

A.n.a. Quiñones ◽

Josefina Bañuls ◽

Eduardo Primo Millo ◽

Francisco Legaz

Keyword(s):

Nitrogen Uptake ◽

Nitrogen Uptake Efficiency ◽

Uptake Efficiency ◽

Application Frequency ◽

Citrus Trees

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In-Field Observation of Root Growth and Nitrogen Uptake Efficiency of Winter Oilseed Rape

Agronomy ◽

10.3390/agronomy10010105 ◽

2020 ◽

Vol 10 (1) ◽

pp. 105

Author(s):

Julien Louvieaux ◽

Antoine Leclercq ◽

Loïc Haelterman ◽

Christian Hermans

Keyword(s):

Root Growth ◽

Oilseed Rape ◽

Root Development ◽

Nitrogen Uptake ◽

Root Morphology ◽

Growth Stages ◽

Winter Oilseed Rape ◽

Nitrogen Uptake Efficiency ◽

Uptake Efficiency ◽

N Concentration

Field trials were conducted with two nitrogen applications (0 or 240 kg N ha−1) and three modern cultivars of winter oilseed rape (Brassica napus L.) previously selected from a root morphology screen at a young developmental stage. The purpose is to examine the relationship between root morphology and Nitrogen Uptake Efficiency (NUpE) and to test the predictiveness of some canopy optical indices for seed quality and yield. A tube-rhizotron system was used to incorporate below-ground root growth information. Practically, clear tubes of one meter in length were installed in soil at an angle of 45°. The root development was followed with a camera at key growth stages in autumn (leaf development) and spring (stem elongation and flowering). Autumn was a critical time window to observe the root development, and exploration in deeper horizons (36–48 cm) was faster without any fertilization treatment. Analysis of the rhizotron images was challenging and it was not possible to clearly discriminate between cultivars. Canopy reflectance and leaf optical indices were measured with proximal sensors. The Normalized Difference Vegetation Index (NDVI) was a positive indicator of biomass and seed yield while the Nitrogen Balance Index (NBI) was a positive indicator of above-ground biomass N concentration at flowering and seed N concentration at harvest.

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Improving nitrogen uptake efficiency by chitin nanofiber promotes growth in tomato

International Journal of Biological Macromolecules ◽

10.1016/j.ijbiomac.2019.10.178 ◽

2020 ◽

Vol 151 ◽

pp. 1322-1331 ◽

Cited By ~ 1

Author(s):

Mayumi Egusa ◽

Sumire Matsukawa ◽

Chihiro Miura ◽

Shiori Nakatani ◽

Junpei Yamada ◽

...

Keyword(s):

Nitrogen Uptake ◽

Nitrogen Uptake Efficiency ◽

Uptake Efficiency ◽

Chitin Nanofiber

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Facultative-anaerobic microbial digestion of coal preparation waste and use of effluent solids to enhance plant growth in a sandy soil

International Journal of Coal Science & Technology ◽

10.1007/s40789-020-00374-5 ◽

2020 ◽

Author(s):

Paul H. Fallgren ◽

Liang Chen ◽

Min Peng ◽

Michael A. Urynowicz ◽

Song Jin

Keyword(s):

Plant Growth ◽

Solid Waste ◽

Sandy Soil ◽

Soil Amendment ◽

Average Length ◽

Poa Pratensis ◽

Organic Matter Content ◽

Organic Soil ◽

Kentucky Bluegrass ◽

Coal Preparation

AbstractCoal preparation solid waste, which is a major environmental issue for coal-producing areas in China, may be microbiologically digested and transformed into a product suitable as a soil amendment to increase soil organic matter content and prevent and enhance plant/crop growth. Coal preparation waste collected from a coal sorting plant in Inner Mongolia, China was digested in bioreactors inoculated with microbial enrichments prepared from activated sludge and cow manure. The effluent solids from the coal preparation waste bioreactors were analyzed for their suitability as organic soil amendments, which complied with China standards. Plant growth tests were conducted in sandy soil from a semi-arid region in Colorado, which was amended with the effluent solids. Kentucky bluegrass (Poa pratensis L.) and chives (Allium schoenoprasum) were used as the representative plants for the growth tests, where results indicated substantially higher yields of Kentucky bluegrass and chives for the sandy soils amended with the effluent solids when compared to a commercial organic fertilizer. The number and average length of Kentucky bluegrass shoots were 10 and 5.1 times higher, respectively, in soils amended with the effluent solids. Similarly, the number and average length of chives shoots were 10 and 1.7 times higher, respectively, in soils amended with the effluent solids. Overall, the microbial digestion of coal preparation waste for application as an organic soil amendment is a viable alternative and beneficial use of coal preparation solid waste.

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