Laboratory study on biophysicochemical improvement of desert sand

Fattahi, Seyed Mohammad; Soroush, Abbas; Huang, Ning; Zhang, Jie; Abbasi, Sona Jodari; Yu, Yang

doi:10.1016/j.catena.2020.104531

Cited by 28 publications

(13 citation statements)

References 43 publications

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“…The larger the proportion of salt crust coverage is, the stronger its wind erosion resistance. If the salt crust is broken, the particles jump and accelerate with the wind and finally hit the crust surface, abrading the crusted surfaces in a process similar to sandblasting and increasing the release of dust 37 . This situation can be avoided if there are multiple layers of salt crust.…”

Section: Discussionmentioning

confidence: 99%

Characteristics of soil salt crust formed by mixing calcium chloride with sodium sulfate and the possibility of inhibiting wind-sand flow

2021

Sci Rep

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Soil salt crust can change the structure of aeolian soil and improve its resistance to wind erosion. Four ions (Na+, Ca2+, Cl−, and SO42−) with high contents in aeolian soil were selected for a salt crust experiment. The experiment set a variety of gradients of soil salt contents and salt mixing ratios of Na2SO4 and CaCl2. The physical properties of the salt crust were tested, and the wind erosion resistance of the salt crust was discussed. The results showed that the soil salt contents and salt mixing ratio influenced the resistance of the salt crust, especially in terms of its compressive strength and toughness. The former affected the compressive strength of the salt crust by changing the amount of cemented soil salt. The latter affected the kinds of crystals by changing the ion ratio, thus changing the structure of the salt crust and affecting its wind erosion resistance. The wind erosion resistance of the salt crust is complicated by the interaction between the soil salt content and salt mixing ratio. A multilayer crust can be formed in mixed salt, which has a strong wind erosion resistance. This result provides new findings on flowing sand soil and a new method for the treatment of flowing sand soil.

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Section: Discussionmentioning

confidence: 99%

Characteristics of soil salt crust formed by mixing calcium chloride with sodium sulfate and the possibility of inhibiting wind-sand flow

2021

Sci Rep

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“…Other soil-stabilizing and habitat-amelioration strategies have also been tested with fluctuating results: soil-stabilizing chemicals such as polyacrylamides were shown to be effective in both laboratory (Park et al, 2015) and field settings (Park et al, 2017) but were not as successful in other field experiments (Chandler et al, 2019). Psyllium, a mucilaginous compound extracted from the seed coat of Plantago insularis, showed amelioration of soil conditions more than promotion of biocrust development (Fick et al, 2019(Fick et al, , 2020. NaCl addition allowed some initial soil stabilization due to physical crust formation without disturbing the biocrust growth, while gypsum was shown to not be suitable for cyanobacterial growth (Chandler et al, 2019).…”

Section: Habitat Treatmentsmentioning

confidence: 99%

Drought-tolerant cyanobacteria and mosses as biotechnological tools to attain land degradation neutrality

2021

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Abstract. The induction of biocrusts through inoculation-based techniques has gained increasing scientific attention in the last 2 decades due to its potential to address issues related to soil degradation and desertification. The technology has shown the most rapid advances in the use of biocrust organisms, particularly cyanobacteria and mosses, as inoculants and biocrust initiators. Cyanobacteria and mosses are poikilohydric organisms – i.e., desiccation-tolerant organisms capable of reactivating their metabolism upon rehydration – that can settle on bare soils in abiotically stressing habitats, provided that selected species are used and an appropriate and customized protocol is applied. The success of inoculation of cyanobacteria and mosses depends on the inoculant's physiology, but also on the ability of the practitioner to identify and control, with appropriate technical approaches in each case study, those environmental factors that most influence the inoculant settlement and its ability to develop biocrusts. This review illustrates the current knowledge and results of biocrust induction biotechnologies that use cyanobacteria or mosses as inoculants. At the same time, this review's purpose is to highlight the current technological gaps that hinder an efficient application of the technology in the field.

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“…Production of EPS by cyanobacteria inoculation on the soil induces changes in soil properties important for a number of processes occurring at the soil surface. Cyanobacterial filaments together with their sticky EPS bind sand grains (Mugnai et al, 2018b), forming a cohesive and stable layer that contributes to reducing soil erosion (Kheirfam et al, 2017;Fattahi et al, 2020), one of the most important processes accelerating land degradation in drylands (Ravi et al, 2010). Experiments carried out in sand dunes in China have shown effective soil stabilization after inoculation with Microcoleus vaginatus and S. javanicum, encouraging soil colonization by other biocrust organisms and accelerating biocrust succession (Lan et al, 2014;Park et al, 2017).…”

Section: Implications For Soil Restorationmentioning

confidence: 99%

Exopolysaccharide Features Influence Growth Success in Biocrust-forming Cyanobacteria, Moving From Liquid Culture to Sand Microcosms

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Laboratory study on biophysicochemical improvement of desert sand

Cited by 28 publications

References 43 publications

Characteristics of soil salt crust formed by mixing calcium chloride with sodium sulfate and the possibility of inhibiting wind-sand flow

Characteristics of soil salt crust formed by mixing calcium chloride with sodium sulfate and the possibility of inhibiting wind-sand flow

Drought-tolerant cyanobacteria and mosses as biotechnological tools to attain land degradation neutrality

Exopolysaccharide Features Influence Growth Success in Biocrust-forming Cyanobacteria, Moving From Liquid Culture to Sand Microcosms

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