Establishment of pre-treatment method on analysis of heavy metal forms in sewer sediments

With the modified BCR sequential extraction method, the ultrasonic vibration and microwave digestion techniques were applied to extract heavy metal forms in sewer sediments. Considering the influence of extraction time, temperature, extractant concentration and the digestion types on the extraction...

Full description

Saved in:
Bibliographic Details
Main Authors: Haiyan Li, Huirui Mei, Boping Xu, Chongchen Wang
Format: Conference Proceeding
Language:chi ; eng
Subjects:
chemical forms
Chromium
Copper
FAA
heavy metal
Lead
Nickel
pre-treatment method
Sediments
sewer sediments
Zinc
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:With the modified BCR sequential extraction method, the ultrasonic vibration and microwave digestion techniques were applied to extract heavy metal forms in sewer sediments. Considering the influence of extraction time, temperature, extractant concentration and the digestion types on the extraction efficiency, the optimal testing conditions of sediments pre-treatment were defined. Compared with the results obtained from the traditional method, the modified extraction procedure demonstrated excellent repeatability, reproducibility. The extraction time of every step could be shortened to about 3h, only 1/5 of the traditional method. Hydrochloric acid concentration increased from 0.5mol/L to 0.8mol/L. Its accuracy is also evaluated by standard samples. The obtained results showed that the extraction method is fut and reliable, and satisfied the requirement of followed quantitative analysis. It could serve as a relatively rapid, accurate and stable pre-treatment method for the research of heavy metal pollution in sewer sediments.
DOI:10.1109/ESIAT.2010.5568286