Response of soil enzyme activity and bacterial community to black phosphorus nanosheets
Response of soil enzyme activity and bacterial community to black phosphorus nanosheets
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土壤酶活性和细菌群落对黑磷纳米片的响应
DOI：
10.1039/c9en00716d
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
Xing Baoshan
中科院分区：
文献类型：
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作者：
Zhang Xuejiao;Xiong Zhiqiang;Zhang Siyu;Ge Yuan;Ma Wei;Yan Lei;Li Dengyu;Wang Dongsheng;Deng Shuo;Zhao Qing;Wang Weidong;Xing Baoshan
目前，黑磷（BP）广泛应用于各个领域。关于BP纳米片对哺乳动物细胞和细菌的潜在毒性，非常需要评估其生态效应。本研究重点研究BP纳米片对黑土和棕土的酶活性、细菌群落结构和细菌功能的影响。我们发现 BP 纳米片在 60 天的暴露期间对黑土中的酶活性没有显着影响。相比之下，棕土中的脲酶和过氧化氢酶活性分别在第10天和第30天受到显着抑制，并在第60天逐渐恢复。BP纳米片的引入显着降低了第10天棕土中的群落丰富度，但对黑土的多样性和丰富度没有影响。这种差异归因于 BP 纳米片与富含有机质的黑土的相互作用更强，导致 BP 纳米片的生物利用度降低。然而，预计 BP 纳米片对两种土壤中细菌功能的影响可以忽略不计。值得进一步研究其深层次机制和剂量依赖性效应，为BP纳米片的安全使用和排放奠定基础。
Currently, black phosphorus (BP) is widely applied in a variety of fields. Concerning the potential toxicity of BP nanosheets towards mammalian cells and bacteria, there is a great need to evaluate their ecological effects. This study was focused on the effect of BP nanosheets on enzyme activity, bacterial community structure, and bacterial function of black soil and burozem. We found BP nanosheets had no significant impact on enzyme activities in black soil during the 60 day exposure. In contrast, the activities of urease and catalase in burozem were significantly inhibited at day 10 and day 30, respectively, which were gradually recovered at day 60. The introduction of BP nanosheets significantly decreased the community richness in burozem at day 10, but had no effect either on the diversity or the richness in black soil. The discrepancies were attributed to the stronger interaction of BP nanosheets with organic matter-rich black soil, leading to a lowered bioavailability of BP nanosheets. Nevertheless, BP nanosheets were predicted to have negligible effect on bacterial function in both soils. It is worthwhile to further investigate the in-depth mechanisms and dose-dependent effect in order to lay the foundation for safe application and discharge of BP nanosheets.