Department of Civil and Environmental Engineering, Shantou University, No 243 Daxue Road, Shantou, Guangdong Province, 515063, China.
School of Environmental Science and Engineering, Tiangong University, No. 399 Binshui West Road, Xiqing District, Tianjin, 300387, China.
Environ Pollut. 2021 Sep 1;284:117179. doi: 10.1016/j.envpol.2021.117179. Epub 2021 Apr 20.
A pot experiment was carried out on brown soil polluted by dibutyl phthalate (DBP) and di-(2-ethylhexyl) phthalate (DEHP) to investigate the effects of biochar (BC) derived from corn straw and Fe-Mn oxide modified biochar composites (FMBC) on the bioavailability of DBP and DEHP, as well as ecosystem responses in rhizosphere soil after wheat ripening. The results indicate that the application of BC and FMBC significantly increases soil organic matter, pH, available nitrogen (AN), Olsen phosphorus, and available potassium (AK); reduces the bioavailability of DBP and DEHP; enhances the activities of dehydrogenase, urease, protease, β-glucosidase, and polyphenol oxidase; and decreases acid phosphatase activity. No changes in richness and diversity, which were measured by Illumina MiSeq sequencing, were observed following BC and FMBC application. The bacterial community structure and composition varied with DBP/DEHP concentrations and BC/FMBC additions in a nonsystematic way and no significant trends were observed. In addition, FMBC exhibited better performance in increasing soil properties and decreasing the bioavailability of DBP and DEHP compared with BC. Hence, the FMBC amendment may be a promising way of developing sustainable agricultural environmental management.
采用盆栽试验研究了邻苯二甲酸二丁酯（DBP）和邻苯二甲酸二（2-乙基己基）酯（DEHP）污染的棕壤中生物炭（BC）和铁锰氧化物改性生物炭复合材料（FMBC）对 DBP 和 DEHP 生物有效性以及小麦收获后根际土壤生态系统响应的影响。结果表明，BC 和 FMBC 的施用显著增加了土壤有机质、pH 值、有效氮（AN）、Olsen 磷和有效钾（AK）；降低了 DBP 和 DEHP 的生物有效性；增强了脱氢酶、脲酶、蛋白酶、β-葡萄糖苷酶和多酚氧化酶的活性；降低了酸性磷酸酶的活性。BC 和 FMBC 的施用并未改变 Illumina MiSeq 测序所测的丰富度和多样性。细菌群落结构和组成随 DBP/DEHP 浓度和 BC/FMBC 添加而变化，没有明显的趋势。此外，FMBC 对增加土壤性质和降低 DBP 和 DEHP 的生物有效性的效果优于 BC。因此，FMBC 改良可能是发展可持续农业环境管理的一种有前景的方法。
