scholarly journals The use of Sodium Hypobromite for the Oxidation of Organic Matter in the Mechanical Analysis of Soils

1931 ◽  
Vol 21 (3) ◽  
pp. 476-483 ◽  
Author(s):  
Erik Troell
Keyword(s):  
Hydrogen Peroxide ◽  
Organic Matter ◽  
Manganese Dioxide ◽  
Mechanical Analysis ◽  
The Tropics

1. The use of freshly prepared solutions of sodium hypobromite instead of boiling hydrogen peroxide solutions in the pretreatment of soils for mechanical analysis by the pipette method has the following advantages:(a) Soils containing manganese dioxide or large amounts of organic matter may be oxidised rapidly without heat, whereas oxidation of such soils by hydrogen peroxide is a tedious operation requiring large amounts of reagent.(b) Possible changes in the clay through heating and the dissolution of considerable amounts of sesquioxides are avoided.(c) The reagents are cheaper and more stable, especially in the tropics.(d) It makes possible further simplification in the technique of mechanical analysis.

scholarly journals Nature of Aggregation in Two Tropical Soils of Puerto Rico

1969 ◽  
Vol 52 (3) ◽  
pp. 227-232
Author(s):  
Raul Pérez Escolar ◽  
M. A. Lugo López
Keyword(s):  
Organic Matter ◽  
Puerto Rico ◽  
Organic Matter Content ◽  
Tropical Soils ◽  
Mechanical Analysis ◽  
Matter Content ◽  
Clay Particles ◽  
General Data ◽  
The Tropics ◽  
Cementing Agent

In both Catalina clay and Cialitos clay there are no marked differences in the properties of the different-sized aggregates and the corresponding whole soils studied. Although well-drained upland soils in the Tropics are supposed to contain less organic matter than those in the cooler Temperate Zones, the organic-matter content of Catalina clay and Cialitos clay was as great as that found in many soils of the same texture in Temperate Zones. Organic matter has a very definite influence as a cementing agent between clay particles. This was shown by the low clay values obtained when or ganic matter was not removed by pretreating the soil with hydrogen per oxide prior to mechanical analysis. From the general data obtained in the study of the aggregates of both soils, it can be inferred that they are formed largely as a result of the breakdown of large massive units of soils. If synthesis occurred to a larger extent, more marked differences could be expected in their constitutional makeup.

Effects of organic matter, ammonia, bromide, and hydrogen peroxide on bromate formation during water ozonation

Chemosphere ◽  
2021 ◽  
pp. 131352
Author(s):  
Yongjing Wang ◽  
Tao Man ◽  
Ruolin Zhang ◽  
Xinyu Yan ◽  
Songtao Wang ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Organic Matter

Multifactorial optimization of the decolorisation parameters of wastewaters resulting from dyeing flowers

2009 ◽  
Vol 59 (7) ◽  
pp. 1361-1369 ◽  
Author(s):  
Edison Gil Pavas ◽  
Miguel Ángel Gómez-García
Keyword(s):  
Hydrogen Peroxide ◽  
Organic Matter ◽  
Experimental Design ◽  
Order Reaction ◽  
Pseudo First Order Reaction ◽  
First Order ◽  
Effluent Standards ◽  
Degradation Of Dyes ◽  
Pseudo First Order ◽  
Dyes Mixture

This work deals with the treatment of the wastewaters resulting from the process of dyeing flowers. In some local cases for growing flowers near to Medellín (Colombia), wastewater color was found to be one of the main problems in meeting local effluent standards. Wastewaters were treated by photodegradation process (which includes photocatalysis) to achieve the degradation of dyes mixture and organic matter in the wastewater. A multifactorial experimental design was proposed, including as experimental factors the following variables: pH, and the concentration of both catalyst (TiO2) and hydrogen peroxide (H2O2). According to the obtained results, at the optimized variables values, it is possible to reach a 99% reduction of dyes, a 76.9% of mineralization (TOC) and a final biodegradability of 0.834. Kinetic analysis allows proposing a pseudo first order reaction for the reduction, the mineralization, and the biodegradation processes.

Organic Matter Knowledge and Management in Soils of the Tropics Related to Ecosystem Services

2010 ◽  
pp. 241-276 ◽  
Author(s):  
C. Feller ◽  
E. Blanchart ◽  
M. Bernoux ◽  
R. Lal ◽  
R. Manlay ◽  
...  
Keyword(s):  
Organic Matter ◽  
Ecosystem Services ◽  
The Tropics

scholarly journals Potential relevance of Mortierella alpina as a source of ice nucleating particles in soil

2018 ◽  
Author(s):  
Franz Conen ◽  
Mikhail V. Yakutin
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Soil Fungus ◽  
Soil Samples ◽  
Mortierella Alpina ◽  
Soil Particles ◽  
The Tropics

Abstract. Soil organic matter carries ice nucleating particles (INP) of which the origin is hard to define and that are active at slight supercooling. The discovery and characterisation of INP produced by the widespread soil fungus Mortierella alpina permits a more targeted investigation of the likely origin of INP in soils. We searched for INP with characteristics similar to those reported for M. alpina (INPM-like) in 20 soil samples from four areas in the northern midlatitudes and one area in the tropics. In the 15 samples where we could detect INPM-like, they constituted between 1 and 94 % (median 11 %) of all INP active at −10 °C or warmer associated with soil particles

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