汽爆秸秆对磷矿粉溶解作用及其溶解残渣对小麦生长的影响

doi:10.3969/j.issn.1673-5854.2020.04.004

Abstract

Abstract:

In order to explore the dissolving effect of biomass on phosphate rock powder, steam explosion was used to release organic acid from corn stalk(CS) to dissolve phosphate rock powder(PRP) under high temperature and hydrothermal conditions, at the same time, phosphorus-containing humic acid was prepared. The process of dissolving phosphate rock powder by steam exploded corn stalk(SECS) was explored and the optimal conditions were determined. The structures and properties were investigated by Fourier transform infrared spectroscopy(FT-IR), scanning electron microscopy(SEM) and X-ray fluorescence spectroscopy(XRF). The results showed that under the conditions of temperature 170℃, 15 g steam exploded corn stalk, 1 g phosphate rock powder, 75 mL water, adding 10% calcium chloride, reaction for 3 h, the amount of dissolved phosphorus was 1.46 mg/g(based on the mass of stalk). The addition of sodium bisulfate could lower the pH value of the system to below 2, and the amount of dissolved phosphorus could reach 13.26 mg/g. Under high temperature and hydrothermal conditions, partial humification of stalks could be directly used as fertilizer. After adding 0.2% humic acid, the plant height, root length, chlorophyll content and relative conductivity of wheat were significantly higher than those of the control group.

Key words: corn stalk, steam explosion, phosphate rock power, dissolution, humic acid

CLC Number:

TQ35
TD985

Feifei LIU,Lan WANG,Zuohu LI,Hongzhang CHEN. Dissolving Effect of Steam Exploded Corn Stalk on Phosphate Rock Powder and Influence of Its Residual on Wheat Growth[J]. Biomass Chemical Engineering, 2020, 54(4): 23-29.

Figures/Tables 8

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References 23

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秸秆corn stalk	溶磷量/(mg·g^-1) dissolved phosphorus	成分content/%
秸秆corn stalk	溶磷量/(mg·g^-1) dissolved phosphorus	纤维素cellulose	半纤维素hemicellulose	酸不溶木质素acid insoluble lignin	酸不溶灰分acid insoluble ash
未处理untreated	0.069	35.20	23.59	17.26	1.67
汽爆steam exploded	1.380	49.47	11.56	27.03	1.49

溶解介质 medium	磷质量浓度/(mg·L^-1) mass concentrationof phosphorus	能耗 energy consumption	反应时间 reaction time	原料成本 raw material costs	残渣的利用 residue utilization	环境评价 environmental assessment
硫酸sulfuric acid	1300	低low	长long	高high	不可利用 unavailable residue	污染严重 serious pollution
盐酸hydrochloric acid	1500	低low	长long	高high	不可利用 unavailable residue	污染较小 slight pollution
硝酸nitric acid	1700	高high	长long	高high	可利用 available residue	污染较小 slight pollution
草酸oxalic acid	187.5	高high	长long	高high	利用困难 using difficulty	污染严重 serious pollution
汽爆秸秆steam exploded corn stalk	406.17	低low	短short	高high	利用容易 using easily	清洁、无污染 clean and pollution-free

腐殖酸质量分数/% mass fraction of humic acid	株高/cm plant height	根长/cm root length	总叶绿素/(mg·g^-1) total chlorophyll content	相对电导率/% relative conductivity	可溶性糖/(mg·g^-1) soluble sugar content
0	29.5	6.8	0.80	41.35	3.471
0.1	32.0	9.1	1.05	46.00	3.819
0.2	35.1	10.5	1.09	62.39	3.256
0.3	32.5	7.2	0.88	56.24	3.632
0.4	30.5	6.2	0.90	53.99	2.962

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Dissolving Effect of Steam Exploded Corn Stalk on Phosphate Rock Powder and Influence of Its Residual on Wheat Growth

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