The behaviour of heavy metals was investigated at 22 wastewater treatment plants (WWTPs). In addition, the survey of heavy metal balance was conducted in detail at one WWTP. For the measurement, 22 types of heavy metals were selected from the chemical materials of pollutant release and transfer register (PRTR). There were some heavy metals, which were detected not in wastewater but in dewatered sludge. By means of the detailed survey at one WWTP, 60 to 80% of some heavy metals, such as B, Mn, Co, Ni and Mo, were discharged with treated water. According to the results of PRTR, Zn, B and Mn accounted for a large part of the discharge into the water course. To estimate the behaviour of heavy metals in the environment, leaching tests were applied to the products made of biosolids. During a series of leaching tests for building materials, it was observed that the concentration of heavy metals was very small, but the ratio of increase keeps a constant value. Therefore, it was considered that the acid extractable contents of heavy metal would be important.
Skip Nav Destination
Article navigation
Research Article|
May 01 2006
Study on risk management of heavy metals for reuse of biosolids
M. Ozaki;
M. Ozaki
*Material and Geotechnical Engineering Research Group, Public Works Research Institute, Tsukuba, Japan
Search for other works by this author on:
M. Suwa;
M. Suwa
*Material and Geotechnical Engineering Research Group, Public Works Research Institute, Tsukuba, Japan
Search for other works by this author on:
Y. Suzuki
Y. Suzuki
**Water Environment Research Group, Public Works Research Institute, Tsukuba, Japan
Search for other works by this author on:
Water Sci Technol (2006) 53 (11): 189–195.
Citation
M. Ozaki, M. Suwa, Y. Suzuki; Study on risk management of heavy metals for reuse of biosolids. Water Sci Technol 1 May 2006; 53 (11): 189–195. doi: https://doi.org/10.2166/wst.2006.352
Download citation file:
Sign in
Don't already have an account? Register
Client Account
You could not be signed in. Please check your email address / username and password and try again.
Impact Factor 2.430
CiteScore 3.4 • Q2
13 days submission to first
decision
1,439,880 downloads in 2021
37
Views
7
Citations