Issue |
E3S Web Conf.
Volume 38, 2018
2018 4th International Conference on Energy Materials and Environment Engineering (ICEMEE 2018)
|
|
---|---|---|
Article Number | 02004 | |
Number of page(s) | 5 | |
Section | Material Science and Technology | |
DOI | https://doi.org/10.1051/e3sconf/20183802004 | |
Published online | 04 June 2018 |
Research on The Removal of Scale Ions from Circulating Cooling Wastewater by Chemical Coagulation Process
1
Harbin Institute of Technology, Shenzhen Graduated School, Shenzhen 518055, China.
2
China Coal Research Institute, Beijing, China, 100013
* Corresponding author: du@cct.org.cn
In this paper, the circulating cooling wastewater was treated by chemical coagulation process through adding NaOH/Na2CO3.The effect of NaOH and Na2CO3 dose on removal of scale ions, such as Ca2+, Mg2+, Ba2+, Sr2+, SiO2, was studied and the removal mechanism was discussed. The results showed that the increase of NaOH dose was beneficial to the removal of above-mentioned scale ions. When NaOH was only added, the removal efficiency of Ca2+, Mg2+, Ba2+, Sr2+, SiO2 was 86.3%, 91.6%, 86.5%, 58.1%, 84.2%, respectively. When 680 mg/L of NaOH and 300 mg/L of Na2CO3 were added, and the effluent pH was above 11.2, the removal efficiency of Ca2+, Mg2+ was 95.8% and 89.4%, respectively, and the concentration of Ca2+and Mg2+ was below 20 mg/L, which met the target of wastewater treatment. Finally the possible removal mechanism of Ca2+, Mg2+, Ba2+, Sr2+and SiO2 was discussed.
© The Authors, published by EDP Sciences, 2018.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.