Effects of polyacrylamide on soil erosion and nutrient losses from substrate material in steep rocky slope stabilization projects

Chen, Zhang; Chen, Wenlu; Li, Chengjun; Pu, Yanpin; Sun, Haifeng

doi:10.1016/j.scitotenv.2016.02.173

Cited by 53 publications

(12 citation statements)

References 36 publications

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“…Sepaskhah & Bazrafshan‐Jahromi (2006) reported that PAM application on steep slopes could enhance the final infiltration rate and reduce runoff and soil erosion. Chen, Chen, Li, Pu, & Sun (2016) suggested that PAM could significantly reduce nutrient losses and soil erosion, but the reduction was dependent on the properties and application rate of PAM.…”

Section: Discussionmentioning

confidence: 99%

Simulation of the impacts of native vegetation and polyacrylamide on hydraulic properties and heavy metal concentrations at mine dumps

Zhou

et al. 2021

Land Degrad Dev

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The ecological restoration of mine dumps is challenging because of the loose soil structure, toxic heavy metal, and severe soil erosion at such sites. The impacts of native grass and polyacrylamide (PAM) on the soil sediment concentration, hydraulic properties, and heavy metals at mine dumps were investigated via scouring tests with a flow discharge of 90 L min −1 . In the initial stages of the tests, fluctuating decreasing trends in the soil sediment concentration, flow velocity, and flow Ni concentration were observed, while a fluctuating increasing trend was observed in the flow resistance f. After a period of adjustment, the steady-state soil sediment concentrations, hydraulic properties, and Ni concentrations in the flow were attained. An increasingdecreasing trend for the V concentration and a decreasing-increasing trend for the Cu concentration in the flow were observed over time. In addition, Zn was not dissolved or transported by the overland flow. A significant correlation between the heavy metal concentration in the flow and soil sediment concentration was observed (p ≤ 0.01). Both native grass and PAM could effectively control soil loss and change hydraulic properties by increasing the surface roughness. The steady-state flow velocity of B5 was 1.11-1.36 times higher than in the other treatments, while the steady-state resistance f of B5 was 12.54-45.02% lower than in the other treatments. However, the native grass and PAM had different effects on the transport of heavy metals. The native grass could effectively reduce the mobility of V, while the PAM could reduce the mobility of Cu and V.

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Section: Discussionmentioning

confidence: 99%

Simulation of the impacts of native vegetation and polyacrylamide on hydraulic properties and heavy metal concentrations at mine dumps

Zhou

et al. 2021

Land Degrad Dev

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“…In a field experiment, Chen et al . 29 found that PAM application reduced total nitrogen losses by 35.3% to 50.0% and total phosphorus losses by 34.9% to 48.0% relative to the control group. However, solute transport modeling involving PAMs is made quite challenging by their unknown effects on surface soil structure and the mixing depth.…”

Section: Introductionmentioning

confidence: 88%

Mathematical model of ammonium nitrogen transport with overland flow on a slope after polyacrylamide application

Yang

Ren

et al. 2018

Sci Rep

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The nutrient loss caused by soil erosion is the main reason for soil degradation and environmental pollution, and polyacrylamide (PAM) as a common soil amendment has a great influence on runoff and erosion processes at the slope. In order to investigate the mechanism of nutrient transport with runoff, a field experiment was conducted and a simple mathematical model was developed in this study. Four PAM application rates (0, 1, 2, and 4 g·m−2) and two rainfall intensities (50 and 80 mm·h−1) were applied in the field experiment. The results revealed that runoff rate of 2 g·m−2 PAM application treatments decreased by 5.3%-10.6% compared with the control groups, but it increased by10.9%-18.7% at 4 g·m−2 PAM application treatments. Polyacrylamide application reduced ammonium nitrogen concentrations of runoff by 10.0% to 44.3% relative to the control groups. The best performance with correlation coefficient (R2) and Nash–Sutcliffe efficiency (NSE) showed that the ammonium transport with runoff could be well described by the proposed model. Furthermore, the model parameter of the depth of the mixing layer (hm) linearly increased with an increase in flow velocity, but exponentially decreased with an increase in PAM application rate.

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“…Polyacrylamide (PAM)‐based polymers were also used to reduce runoff soil losses and to decrease the loss of the soil nutrients. Zhang Chen et al 11 studied the effect of PAM concentration, molecular weight and charge density on soil erosion and nutrients, indicating that the control of the physicochemical properties of PAM is very important for the target application. The requirements in the hydrophilic polymers used for this kind of application are concerned with the physicochemical properties of the polymers including permeability, stability, wettability, and recyclability 12 .…”

Section: Introductionmentioning

confidence: 99%

Mechanically stable membranes of polyacrylic acid‐grafted chitosan‐functionalized carbon nanotubes with remarkable water storage capacity in sandy soils

Alsohaimi

Hafez

Berber

2020

J of Applied Polymer Sci

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Polyacrylic acid (PAA) is one of the most exciting hydrophilic polymers for water control and conservation; however, it suffers from poor mechanical properties during the agricultural applications. For that purpose a series of PAA-based multiwalled carbon nanotubes (MWCNTs) membranes have synthesized via a grafting process of MWCNTs using chitosan (CS) polymer as a binder. The fabricated membranes have spectroscopically characterized by different techniques to confirm the composite structure. The MWCNTs content into the PAA membranes has played a pronounced effect on water absorptivity, swelling behavior, and mechanical properties. PAA membrane has showed a fourfold increase in yield-stress by the addition of 3 wt% PAA/CS/MWCNTs, while preserving a 91% of water absorptivity of PAA membrane. The soil applications of the PAA/CS/MWCNTs membranes have showed remarkable improvements in soil moisture content compared to the PAA membrane. This study provides a promising pathway for future field applications, especially in arid lands.

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Effects of polyacrylamide on soil erosion and nutrient losses from substrate material in steep rocky slope stabilization projects

Cited by 53 publications

References 36 publications

Simulation of the impacts of native vegetation and polyacrylamide on hydraulic properties and heavy metal concentrations at mine dumps

Simulation of the impacts of native vegetation and polyacrylamide on hydraulic properties and heavy metal concentrations at mine dumps

Mathematical model of ammonium nitrogen transport with overland flow on a slope after polyacrylamide application

Mechanically stable membranes of polyacrylic acid‐grafted chitosan‐functionalized carbon nanotubes with remarkable water storage capacity in sandy soils

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