Acid Copper-Containing Waste Water Treatment by Eggshells:an Experimental Study
- VernacularTitle:鸡蛋壳在酸性含铜废水处理中的应用
- Author:
Xiaoyan LI
;
Shuyin YIN
;
Wenjuan LI
- Publication Type:Journal Article
- Keywords:
Water pollution;
Acid copper-containing waste water;
Purification;
Eggshell
- From:
Journal of Environment and Health
2007;0(11):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To find a simple, effective and inexpensive method for acid copper-containing waste water treatment. Methods Studied the processing of the leaching waste water from the laboratory of East China Institute of Technology and simulated acid copper mine waste water(concentration of Cu2+ is 143.00 mg/L, pH: 1.80-2.00) using the processed eggshells to treat acid copper-containing waste water under the condition of different calcining temperature, eggshells amount,eggshells size and stirring speed. Results The best condition was that the calcining temperature was 400 ℃, the amount of eggshells was 25 g/L, the size of eggshells was 0.25 mm, the stirring speed was 240 r/min. The eggshells could increase the pH values from 1.80-2.00 to 6.86-7.34 and reduce Cu2+ concentration from 0.43 mg/L to 0.09 mg/L, the concentration of Cu2+ in the treated waste water could answer for the first level of the Integrated Waste Water Discharge Standard(GB 8978-1996), the removal rates could reach 99.70%-99.94%. Conclusion Using eggshells to treat acid copper-containing waste water has application prospects for the process, is simple and easy to be operated, the treatment effect is good.
