College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China.
College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China.
J Hazard Mater. 2020 Mar 5;385:121533. doi: 10.1016/j.jhazmat.2019.121533. Epub 2019 Oct 29.
Biochar and compost, two common amendments, were rarely conducted to investigate their combined influence on enzymatic activities and microbial communities in organic-polluted wetlands. This article described the effects of biochar/compost on degradation efficiency of sulfamethoxazole (SMX) and ecosystem responses in polluted wetland soil during the whole remediation process. 1% biochar (SB1) increased degradation efficiency of SMX by 0.067% ascribed to the increase of dehydrogenase and urease. 5% biochar (SB5) decreased degradation efficiency by 0.206% due to the decrease of enzymes especially for dehydrogenase. 2% compost (SC2), 1% biochar & 2% compost (SBC3), both 10% compost (SC10) and 5% biochar & 10% compost (SBC15) enhanced degradation efficiency by 0.033%, 0.015% and 0.222%, respectively, due to the increase of enzymes and biomass. The degradation efficiency was positively related to biomass and enzymatic activities. High-throughput sequencing demonstrated that HCGs (SB5, SC10, SBC15) improved the bacterial diversities but reduced richness through introducing more exogenous predominance strains and annihilated several inferior strains, while LCGs (SB1, SC2, SBC3) exhibited lower diversities but higher richness through enhanced the RAs of autochthonal preponderant species and maintained some inferior species. Additionally, HCGs raised the RAs of amino and lipid metabolism gene but lowered those of carbohydrate compared with LCGs.
生物炭和堆肥是两种常见的改良剂，但很少有研究将它们的联合影响用于研究有机污染湿地中的酶活性和微生物群落。本文描述了生物炭/堆肥对污染湿地土壤中磺胺甲恶唑（SMX）降解效率和生态系统响应的整个修复过程中的影响。1%生物炭（SB1）增加了 0.067%的 SMX 降解效率，这归因于脱氢酶和脲酶的增加。5%生物炭（SB5）降低了 0.206%的降解效率，这是由于酶的减少，特别是脱氢酶。2%堆肥（SC2）、1%生物炭和 2%堆肥（SBC3）、10%堆肥（SC10）和 5%生物炭和 10%堆肥（SBC15）分别增加了 0.033%、0.015%和 0.222%的降解效率，这是由于酶和生物量的增加。降解效率与生物量和酶活性呈正相关。高通量测序表明，HCGS（SB5、SC10、SBC15）通过引入更多的外源优势菌株和消灭几种劣势菌株来提高细菌多样性，但降低了丰富度，而 LCGs（SB1、SC2、SBC3）则通过增强优势种的 RA 和维持一些劣势种来表现出较低的多样性和较高的丰富度。此外，HCGS 提高了氨基酸和脂质代谢基因的 RA，但与 LCGs 相比，降低了碳水化合物的 RA。
