EFFECTS OF EXTRACTION PROCEDURES ON FULVIC-ACID PROPERTIES

被引：21

作者：

GREGOR, JE

POWELL, HKJ

机构：

[1] Univ of Canterbury, Christchurch, NZ, Univ of Canterbury, Christchurch, NZ

来源：

SCIENCE OF THE TOTAL ENVIRONMENT | 1987年 / 62卷

关键词：

ACIDS - Organic - ORGANIC COMPOUNDS - Extraction;

D O I：

10.1016/0048-9697(87)90476-1

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Acid pyrophosphate (pH 2-4) is proposed as an extractant for soil fulvic acids. After XAD treatment of the extractant solution low-ash fulvic acids are obtained in high yield. The fulvic acids were subjected to the high pH and low pH conditions normally encountered in fulvic acid extraction. The observed changes induced in molecular weight distribution, equivalent weight, acid dissociation constants (pK//i) and metal binding strength are reported.

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页码：3 / 12

页数：10

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