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| Removal of Cu and Zn from Pig Manure by Acids and Ultrasound |
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| KeyWord:pig manure; Cu; Zn; removal; acids; ultrasound |
| Author Name | Affiliation | | YANG Ning | College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China | | YANG Yang | College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha 410128, China | | PENG Liang | College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China | | ZENG Qing-ru | College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China |
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| Abstract: |
| Use of heavy metals-containing additives in animal feed has caused heavy metal contamination in pig manure. This study was to assess the effects of acids and ultrasound on Cu and Zn in the pig manure from aspects of removal rates and influence factors. Both acids and ultrasound could remove Cu and Zn from the pig manure. The removal of Cu and Zn by acids increased with increasing amount of acid and reaction time. The removal rate was 58.70% for Cu and 81.85% for Zn after 3 h reaction at pH 0.70. At 40 kHz of ultrasonic frequency and 90 min of ultrasonic time, ultrasound removed Cu by 87.43% and Zn by 76.48%. Combination of ultrasound and acid resulted in higher removal rates of Cu and Zn from the pig manure. |
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