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CaO2 Nano

Jing-Bo Yao, Jie Zhou, Ming-Xin Wang, Zhi-Xiang Xun, Jin-Juan Xue
Nano zerovalent iron (nZVI) and CaO2 were used to construct a heterogeneous Fenton-like system to degrade α -hexachlorocyclohexane ( α -HCH) in soil solution, and the degradation efficiency and mechanism were investigated. The results showed that nZVI/CaO2 can degrade α -HCH in an extensive pH range. When the dosage of nZVI and CaO2 was 1 g·L-1 and pH was 5, the degradation rate of α -HCH reached 93.23%. The degradation process of nZVI, CaO2 , and nZVI/CaO2 treatments accorded with the first-order reaction kinetics model...
November 8, 2018: Huan Jing Ke Xue= Huanjing Kexue
Hamid Mosmeri, Ebrahim Alaie, Mahmoud Shavandi, Seyed Mohammad Mehdi Dastgheib, Saeideh Tasharrofi
Nano-size calcium peroxide (nCaO2) is an appropriate oxygen source which can meet the needs of in situ chemical oxidation (ISCO) for contaminant remediation from groundwater. In the present study, an easy to handle procedure for synthesis of CaO2 nanoparticles has been investigated. Modeling and optimization of synthesis process was performed by application of response surface methodology (RSM) and central composite rotatable design (CCRD) method. Synthesized nanoparticles were characterized by XRD and FESEM techniques...
August 14, 2017: Environmental Monitoring and Assessment
Boran Wu, Xiaohu Dai, Xiaoli Chai
The production of sewage sludge with the presence of various contaminants has been a serious issue for the operation of wastewater treatment plants on both the economical and environmental sides. To minimize the sludge volume to be handled and limit the potential environmental risk, this study developed a novel oxidative leaching process for enhanced sewage sludge dewatering and simultaneous removal of heavy metals based on nano-CaO2 . Response surface methodology determined the following optimal conditioning parameters in terms of capillary suction time reduction: 0...
July 2017: Environmental Science and Pollution Research International
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