WASTE KRAFT BLACK LIQUORS AS RAW-MATERIAL FOR THE PRODUCTION OF NITROGENOUS HUMIC FERTILIZERS BY AN OXIDATION-AMMONIATION PROCESS

被引：8

作者：

GONZALEZ, C

ALVAREZ, R

COCA, J

机构：

[1] Department of Chemical Engineering, University of Oviedo, Oviedo

来源：

FERTILIZER RESEARCH | 1992年 / 33卷 / 03期

关键词：

KRAFT LIQUORS; KRAFT BLACK LIQUORS; KRAFT LIGNIN; HUMIC FERTILIZERS; NITROGENOUS HUMIC FERTILIZERS;

D O I：

10.1007/BF01050883

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

The total acidity of humic materials obtained by oxidation of kraft black liquors was previously found to have a very important effect on the results of their ammoniation process (which yields nitrogenous humic fertilizers). This paper deals with a further study of the ammoniation process of two humic materials (with 20 and 60 ml NaOH 0.1 N/g of sample of total acidity) by using liquid NH4OH. The influence of four independent variables (NH4OH concentration, reaction temperature, NH4OH/humic material ratio and reaction time) on the reaction yield, total and ammoniacal nitrogen content of the fertilizers was studied. A 24 factorial design was followed to carry out the experiments. Four models equations, which establish a quantitative relation between the independent and the dependent variables, for each kind of humic material, were found as a result of this work.

引用

页码：279 / 285

页数：7

共 13 条

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