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591.
Initial carbon release characteristics, mechanisms and denitrification performance of a novel slow release carbon source 下载免费PDF全文
Congyu Li Haiyan Wang Guokai Yan Weiyang Dong Zhaosheng Chu Huan Wang Yang Chang Yu Ling Yanjie Zhang 《环境科学学报(英文版)》2022,34(8):32-45
External carbon source addition is one of the effective methods for the treatment of wastewater with low carbon to nitrogen ratio (C/N). Compared with fast-release liquid carbon sources, slow-release solid carbon sources are more suitable for the denitrification process. A novel slow-release solid carbon source (corncob-polyvinyl alcohol sodium alginate- poly-caprolactone, i.e. CPSP) was prepared using corn cob (CC) and poly-caprolactone with polyvinyl alcohol sodium alginate as hybrid scaffold. The physical properties and carbon release characteristics of CPSP and three other carbon sources were compared. CPSP had stable framework and good carbon release performance, which followed the second order release equation. The formic acid, acetic acid, propionic acid and butyric acid released from CPSP accounted for 8.27% ± 1.66 %, 56.48% ± 3.71 %, 18.46% ± 2.69% and 16.79% ± 3.02% of the total released acids respectively. The start-up period of CPSP was shorter than that of the other carbon sources in denitrification experiment, and no COD pollution was observed in the start-up phase (25–72 h) and stable phase (73–240 hr). The composition and structure of the dissolved organic compounds released by CPSP and other carbon sources were analyzed by UV-Vis absorption spectroscopy and three-dimensional fluorescence spectroscopy, which indicated that CPSP was more suitable for denitrification than the other studied carbon sources. 相似文献
592.
Jiang Zhiyun Ni Lixiao Li Xianglan Xu Chu Chen Xuqing Li Shiyin 《Environmental science and pollution research international》2022,29(58):87545-87554
Environmental Science and Pollution Research - Environment-friendly algaecides based on allelopathy have been widely used to control harmful algal blooms. In this research, micro and nano scale... 相似文献
593.
Cao Qingyi Cheng Yingchao Kusakabe Taketoshi Qian Yahui Liang Handong Takaoka Masaki 《Journal of Material Cycles and Waste Management》2023,25(5):2706-2715
Journal of Material Cycles and Waste Management - Mercury, a highly toxic environmental pollutant with a global circulation, must be controlled worldwide. Taking the Wuda underground coal fires,... 相似文献