Research
| Title： | Remediation effect of Cr (VI)-contaminated soil by secondary pyrolysis oil-based drilling cuttings ash |
|---|---|
| First author： | Yang, Hang; Huang, Siyu; Zhang, Yi; Zhou, Boxun; Ahmed, Sanjrani Manzoor; Liu, Huamin; Liu, Yaowen; He, Yong; Xia, Shibin |
| Journal： | CHEMICAL ENGINEERING JOURNAL |
| Years： | 2020 |
| DOI： | 10.1016/j.cej.2020.125473 |
| Abstract： | In this study, secondary pyrolysis oil-based drilling cuttings ash (OBDCA-sp) was used to remediate chromium (Cr)-contaminated soil. The effects of the OBCDA-sp mesh, OBCDA-sp dosage and soil moisture content on the removal of Cr (VI) were investigated. Subsequently, a kinetic experiment was conducted where the pseudo-firstorder and pseudo-second-order kinetic models both fitted well on OBDCA-sp with the adsorption process of Cr (VI) in soil. The change of the chromium form indicated that the addition of OBCDA-sp transformed Cr from an effective state to a stable form, reducing its mobility and bioavailability. X-ray diffraction and Fourier transform infrared spectroscopy analysis were used to verify the potential mechanism of Cr (VI) removal; Ba, Fe, S, and P elements in OBCDA-sp were observed to play a significant role in the reduction of Cr (VI). The results from this study indicate that OBCDA-sp could be an emergent and promising alternative for the remediation of Cr-contaminated soil. |
