scholarly journals Hydrogel composed of potassium acrylate, acrylamide, and mineral as soil conditioner under saline conditions

2022 ◽  
Vol 79 (4) ◽  
Author(s):  
Mirian Cristina Gomes Costa ◽  
Alcione Guimarães Freire ◽  
Diego Vasconcelos Lourenço ◽  
Rayane Rodrigues de Sousa ◽  
Judith Pessoa de Andrade Feitosa ◽  
...  
Keyword(s):  
Soil Conditioner

scholarly journals Modified Humic Substances as Soil Conditioners: Laboratory and Field Trials

Agronomy ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 150
Author(s):  
Natalia A. Kulikova ◽  
Alexander B. Volikov ◽  
Olga I. Filippova ◽  
Vladimir A. Kholodov ◽  
Nadezhda V. Yaroslavtseva ◽  
...  
Keyword(s):  
Humic Substances ◽  
Soil Aggregates ◽  
Field Tests ◽  
Performance Testing ◽  
Field Trials ◽  
Soil Conditioner ◽  
Model Soil ◽  
Substrate Induced Respiration ◽  
And Performance ◽  
Survival Of Seedlings

The paper is devoted to the development and performance testing of a soil conditioner based on leonardite humic substances (LHS) modified with 3-aminopropyltriethoxysilane (APTES). The modified HS were obtained by adding APTES to LHS solution at different mass ratios of LHS and APTES, followed by the investigation of siloxane structures using 31Si NMR spectroscopy. The Urbic Technosol was used as a model soil. The size and amount of water-stable soil aggregates were estimated using wet sieving and laser diffraction, respectively. Toxicity was evaluated by monitoring microbial substrate-induced respiration (SIR) and seedling bioassay. Laboratory column experiments demonstrated an increase in water-stability of the 3–5 mm soil aggregates after LHS-APTES application. Field tests showed an increase in the average weighted diameter of micro aggregates (from 59 to 73 μm) and water-stable macroaggregates (from 1.6 to 2.9 mm) due to the LHS-APTES amendment. A substantial increase in SIR from 5 to 9 mg CO2 (kg h)−1 was detected. Better survival of seedlings was observed. The obtained beneficial results indicate that APTES-modified HS can be successfully used as a soil conditioner. The formation of extended siloxane networks was suggested as the main mechanism of the observed improvement in the structure of the amended soils.

Fetal death of dogs after the ingestion of a soil conditioner

2011 ◽  
Vol 63 (1-2) ◽  
pp. 113-117 ◽  
Author(s):  
Il-Hwa Hong ◽  
Tae-Eog Kwon ◽  
Seung-Keun Lee ◽  
Jin-Kyu Park ◽  
Mi-Ran Ki ◽  
...  
Keyword(s):  
Fetal Death ◽  
Soil Conditioner

Coffee Industry Wastes

1991 ◽  
Vol 24 (1) ◽  
pp. 53-60 ◽  
Author(s):  
B. Gathuo ◽  
P. Rantala ◽  
R. Määttä
Keyword(s):  
Anaerobic Digestion ◽  
Biogas Production ◽  
Central American ◽  
Potential Yield ◽  
Soil Conditioner ◽  
Pollution Loading ◽  
Rural Kenya ◽  
Land Disposal ◽  
Zero Discharge ◽  
Anaerobic Lagoons

Over 120 000 tons coffee is processed per year in Kenya. More than 1200 coffee factories produce a pollution loading equivalent to a staggering population equivalent of over 240 000 000. The coffee industry is therefore the most important industrial polluter in rural Kenya. Pulp, husks and wastewaters are produced. Husks can be directly used as fuel. Wet pulp could be composted and then used as a soil conditioner. Wastewaters have a high BOD5 sometimes even exceeding 9000 mg/l. In India and Central American countries, anaerobic lagoons are mainly used for the treatment of these wastewaters. In Keftya water re-use combined with land disposal with zero discharge has been recommended. However, in all these methods, the desired environmental soundness is rarely achieved. Anaerobic digestion with biogas production is potentially attractive. Fuel generated could be used for drying coffee. About 10 000 GJ of energy is required to dry 1 ton of coffee. The potential yield of biogas from one ton of pulp can be estimated as 131 m3. This is equivalent to 100 litres of petrol in fuel value.

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