大豆粗提脲酶誘導碳酸鈣沉積抑制風沙土風蝕的現(xiàn)場試驗(英文)
發(fā)布時間:2022-10-10 13:56
風蝕作用是干旱、半干旱地區(qū)土地荒漠化和沙塵暴形成的主要原因。本文通過現(xiàn)場試驗研究用大豆粗提脲酶誘導碳酸鈣沉積法抑制風沙土風蝕的可行性。試驗場地位于中國寧夏回族自治區(qū)烏蘭布和沙漠地區(qū)。結果表明,該方法能夠顯著提高風沙土的表面強度和抗風蝕能力。適合當?shù)氐淖顑?yōu)膠結液(尿素-氯化鈣溶液)濃度為0.2 mol/L,最優(yōu)噴灑量為4 L/m~2。在上述用量下,大豆粗提脲酶誘導碳酸鈣沉積法處理30 d后風沙土表層碳酸鈣含量為0.45%,表面強度達306.2 kPa,風蝕深度幾乎為零。風沙土表面強度隨時間的延長而下降,且其長期固沙效果與地形有關。大豆粗提脲酶誘導碳酸鈣沉積法處理12個月后,沙丘迎風面底部和沙地風蝕程度顯著降低且仍能保持較高的表面強度,而沙丘迎風面頂部風蝕較為明顯。掃描電子顯微鏡和X射線能譜儀測試結果證實了碳酸鈣晶體的形成及其橋接效應。結果表明,大豆粗提脲酶誘導碳酸鈣沉積法能夠有效降低風沙土的可蝕性且具有良好的耐久性,是沙漠地區(qū)抑制風沙土風蝕的候選方案。
【文章頁數(shù)】:14 頁
【文章目錄】:
1 Introduction
2 Materials and methods
2.1 Soybeans crude extract and cementation solutions
2.2 Test sites and schemes
2.3 Application methods
2.4 Surface penetration and erosion pins tests
2.5 Measurement of calcium carbonate content
2.6 SEM and EDX analysis
3 Results and discussion
3.1 Effect of SICP treatment on surface strength of sandy land and Ca CO3 precipitation
3.2 Effect of SICP on erosion resistance of sandy land
3.3 Long-term sustainability of SICP treatment
3.4 SEM imaging and EDX analysis
4 Conclusions
Contributors
Conflict of interest
本文編號:3689740
【文章頁數(shù)】:14 頁
【文章目錄】:
1 Introduction
2 Materials and methods
2.1 Soybeans crude extract and cementation solutions
2.2 Test sites and schemes
2.3 Application methods
2.4 Surface penetration and erosion pins tests
2.5 Measurement of calcium carbonate content
2.6 SEM and EDX analysis
3 Results and discussion
3.1 Effect of SICP treatment on surface strength of sandy land and Ca CO3 precipitation
3.2 Effect of SICP on erosion resistance of sandy land
3.3 Long-term sustainability of SICP treatment
3.4 SEM imaging and EDX analysis
4 Conclusions
Contributors
Conflict of interest
本文編號:3689740
本文鏈接:http://sikaile.net/kejilunwen/nykj/3689740.html
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