Interactions between lead(Ⅱ) ions and dissolved organic matter derived from organic fertilizers incubated in the field  

作　　者：Long Chen Boling Li Zhipeng Wu Qingjie Zhao Qiuyue Wang Hailong Wang Bhupinder Pal Singh Weidong Wu Chuanliang Fu 

机构地区：[1]College of Tropical Crops,Hainan University,Haikou 570228,China [2]School of Environmental and Chemical Engineering,Foshan University,Foshan 528000,China [3]Department of Primary Industries,Elizabeth Macarthur Agricultural Institute,Menangle,NSW 2568,Australia [4]Institute of Agricultural Environment and Soil,Hainan Academy of Agricultural Sciences,Haikou 571100,China [5]Key Laboratory of Arable Land Conservation of Hainan Province,Haikou 571100,China

出　　处：《Journal of Environmental Sciences》2022年第11期77-89,共13页环境科学学报（英文版）

基　　金：supported by the Natural Science Foundation for High-level Talents from Basic and Applied Basic Research Programs of Hainan Province (No. 2019RC022);the National Natural Science Foundation of China (Nos. 41807326 and 21866013)。

摘　　要：This work was to study composition characteristics and the subsequent effect on the lead(Pb) binding properties of dissolved organic matter(DOM) derived from seaweed-based(SWOF) and chicken manure organic fertilizers(CMOF) during a one-year field incubation experiment using the excitation-emission matrix-parallel factor(EEM-PARAFAC) and twodimensional correlation spectroscopy(2DCOS) analysis. Results showed that high aromatic and hydrophobic fluorescent substances were enriched in CMOF-derived DOM and SWOFderived DOM and enhanced over time. And phenolic groups in the fulvic-like substances for SWOF-derived DOM and carboxyl groups in the humic-like substances for CMOF-derived DOM had the fastest responses over time, respectively. Moreover, both non-fluorescent polysaccharides and fluorescent humic-like substances or fulvic-like substances with aromatic(C=C) groups first participated in the binding process of Pb to SWOF-derived DOM on day 0 and 180 during the lead binding process. In contrast, humic-like substances associated with aromatic(C=C) and phenolic groups gave a faster response to Pb binding on day 360. Regarding CMOF-derived DOM, the fulvic-like substances associated with aromatic(C=C) and carboxylic groups displayed a faster response to Pb ions on day 0. Nonetheless,polysaccharides and humic-like associated with phenolic groups had a faster response on days 180 and 360. It is noteworthy that the polysaccharides, which participated in Pb binding to CMOF-derived DOM, posed a higher risk of Pb in the environment after 360 days. Therefore, these findings gave new insights into the long-term applications of commercial organic fertilizers for the amendment of soil.

关 键 词：DOM Commercial organic fertilizer Parallel factor analysis Two-dimensional correlation spectroscopy Lead(Pb) 

分 类 号：S141[农业科学—肥料学] X131.3[农业科学—农业基础科学]