Oxidation of Chlorophenols by MnO2 Supported on Kaolinite
Xiong Yang,
Shao Xiaoling
Issue:
Volume 5, Issue 3, May 2017
Pages:
32-37
Received:
4 May 2017
Accepted:
Published:
5 May 2017
Abstract: Chlorophenols (CPs) are of significant concern because of their wide use, toxicity and persistence in environments. In the present study, -MnO2 supported on kaolinite was used as an oxidant to oxidize three kinds of CPs, 4-chlorophenol (CP), 2, 4-dichlorophenol(DCP) and 2, 4, 6-trichlorophenol(TCP). XRD pattern showed that the synthetic MnO2 has a poor crystallinity, and SEM results revealed that MnO2 was evenly coated on kaolinite with a loading amount of 8.64mg/g. All three CPs were efficiently degraded by supported MnO2 with a removal order of 2, 4, 6-TCP>2, 4-DCP>4-CP. The degradation of CPs obviously accompanied with the release of Mn2+. Results also showed the increased oxidant’s dosage promotes the removal of CPs. The reaction of CPs with MnO2 is strictly pH-dependent, the removal of CPs decreased with pH increasing.
Abstract: Chlorophenols (CPs) are of significant concern because of their wide use, toxicity and persistence in environments. In the present study, -MnO2 supported on kaolinite was used as an oxidant to oxidize three kinds of CPs, 4-chlorophenol (CP), 2, 4-dichlorophenol(DCP) and 2, 4, 6-trichlorophenol(TCP). XRD pattern showed that the synthetic MnO2 has a...
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Environmental Impact Post Assessment of the First Phase of Qinghai San Jiang Yuan ---Based on AHP
Zhang Yanning,
Yao Hongyi
Issue:
Volume 5, Issue 3, May 2017
Pages:
38-42
Received:
10 May 2017
Accepted:
Published:
10 May 2017
Abstract: This paper is based on the post-project evaluation perspective, which combined with the general theories, methods and practice of project evaluation and post-evaluation, choosing the First Phase of Qinghai San Jiang Yuan Ecological Protection and Construction project as a case to evaluate its environmental impact and according to characteristics of the project itself analyze its ecological benefits through the comparative analysis, analytic hierarchy process and fuzzy evaluation method. On one hand to provide useful references for similar projects after the evaluation, on the other hand to give the suggestion to relevant departments about how to formulate investment plans and policies of ecological construction.
Abstract: This paper is based on the post-project evaluation perspective, which combined with the general theories, methods and practice of project evaluation and post-evaluation, choosing the First Phase of Qinghai San Jiang Yuan Ecological Protection and Construction project as a case to evaluate its environmental impact and according to characteristics of...
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