ISSN 1070-4272, Russian Journal of Applied Chemistry, 2007, Vol. 80, No. 10, pp. 1764!1766. + Pleiades Publishing, Ltd., 2007.
Original Russian Text + M.V. Efanov A.I. Galochkin, 2007, published in Zhurnal Prikladnoi Khimii, 2007, Vol. 80, No. 10, pp. 1735!1737.
Mechanochemical Production of Nitrogen-containing
Humic Fertilizers from Peat
M. V. Efanov and A. I. Galochkin
Research Institute of Wood Thermoplastics, Barnaul, Russia
Yugora State University, Khanty-Mansiisk, Khanty-Mansi aut. okrug, Russia
Received May 30, 2007
Abstract-Effect of the duration of mechanochemical synthesis (0.533 h) and amounts of hydrogen peroxide
(0.13 0.5 g g
raw material) and ammonia (0.253 0.5 g g
raw material) on the content of nitrogen and
humic and fulvic acids in products of oxidative ammonolysis of peat by the mechanochemical method was
studied. The functional composition of fixed nitrogen was analyzed. Agrochemical tests of the preparations
obtained as nitrogen-containing fertilizers were performed.
The agrochemical value of peat is largely deter-
mined by its organic component (humic and fulvic
acids) and by its nitrogen content. However, the poor
accessibility of the organic substance results in that
the source peat only weakly manifests fertilizer prop-
erties. The organic component of peat can be activated
with aqueous ammonia, which extracts humic sub-
stances as water-soluble ammonium humates .
A known method for production of a nitrogen-con-
taining organic fertilizer, ammonified peat, consists
in treating peat having certain moisture content
with aqueous ammonia. The main disadvantages of
the known method for peat ammonification are its long
duration, which leads to loss of ammonia, and low
content of fixed nitrogen in the ammonified peat .
Previously, a method has been developed for ob-
taining a plant-growth stimulant from peat by its treat-
ment with hydrogen peroxide in aqueous ammonium
in an autoclave at a hydromodulus of 9.5 : 1, am-
monia content of 20350%, and hydrogen peroxide
content of 20330% (both relative to absolutely dry
peat mass) at 120oC for 4 h. This method has im-
portant technological disadvantages: high process tem-
perature (120oC), duration of up to 4 h, and multistage
A new mechanochemical technique has been sug-
gested for production of nitrogen-containing organic
fertilizers by oxidation of peat with hydrogen peroxide
in an aqueous-ammonia medium to give humin-con-
taining derivatives in quantitative yield .
The aim of the present study was to examine
the effect of preparation conditions on the composi-
tion of products formed in oxyammonolysis of peat
by the mechanochemical method.
Raised-bog fuscum peat from the Vasyuganskoe
deposit in Tomsk oblast was used as a raw material.
It had the following parameters (%): degree of de-
composition 10, ash content 2.6, and moisture content
60; and contained (%): total nitrogen 2.2, humic acids
13.8, and fulvic acids 18.5.
The mechanochemical synthesis of products of peat
oxidation with hydrogen peroxide in an aqueous-am-
monia medium was carried out in a vibration mill.
As shown by the results of the experiments per-
formed (Table 1), the content of humic and fulvic
Table 1. Effect of the duration of mechanochemical
vibration grinding on the composition of ammonified peat
(moisture content of peat 60%, mass of absolutely dry peat
5.0 g, amount of hydrogen peroxide 0.1 g g
peat, amount of ammonia 0.25 g g
absolutely dry peat)
³ Grinding ³
³ time, h ³ total ³ humic ³ fulvic
³³nitrogen ³ acids ³ acids
Starting peat ³ 3 ³ 2.2 ³ 13.8 ³ 18.5
1 ³ 0.5 ³ 2.9 ³ 15.3 ³ 22.9
2 ³ 1.0 ³ 3.8 ³ 18.3 ³ 25.4
3 ³ 1.5 ³ 4.7 ³ 3 ³ 3
4 ³ 2.0 ³ 4.9 ³ 18.2 ³ 27.1
5 ³ 2.5 ³ 5.1 ³ 3 ³ 3
6 ³ 3.0 ³ 5.3 ³ 18.7 ³ 31.1