Electrical Conductivity and Chemical Composition of Soil Solution: Comparison of Solution Samplers in Tropical Soils

Carmo, Davi Lopes do; Silva, Carlos Alberto; Lima, José Maria de; Pinheiro, Gabriela Lúcia

doi:10.1590/18069657rbcs20140795

Cited by 44 publications

(32 citation statements)

References 31 publications

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“…The suspension was centrifuged for 10 min at 5000 rpm and RT using Ohaus centrifuge (5000 multi‐Pro series, Ohaus). The obtained supernatant was collected and subject to EC measurement using a conductivity meter 37 . The process was repeated twice and an average was recorded in Table 1.…”

Section: Methodsmentioning

confidence: 99%

“…The resultant suspension was sonicated for 10 min using a Branson ultrasonic bath (CPXH 8800, Bransonic). The pH of the suspension was then measured using a probe pH‐meter 37 . The process was repeated 3 times and an average was reported in Table 1.…”

Section: Methodsmentioning

confidence: 99%

“…The obtained supernatant was collected and subject to EC measurement using a conductivity meter. 37 The process was repeated twice and an average was recorded in Table 1.…”

Section: Determination Of the Physiochemical Properties Of Soil Usementioning

confidence: 99%

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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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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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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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“…the supernatant was collected and subject to EC measurement using a conductivity meter. (Carmo et al, 2016) The process was repeated twice and an average was recorded in Table 1.…”

Section: Determination Of Physical and Chemicalmentioning

confidence: 99%

Efficient Removal of the Toxic Lead Ions from ContaminatedSandy Soils using Newly Engineered Carbon Black Nanoadsorbent

Hafez

2019

Alexandria Journal of Agricultural Sciences

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Soils contaminated with heavy metals can embarrass a fatal risk to the environment and human life via the direct uptake of the heavy metal-contaminated agricultural crops. Hence, the treatment of metal-contaminated soils is attracting a lot of research activities to reduce the negative impact on the environment. In the current study, I have activated the surface of the carbon black (CB) adsorbent by introducing functional groups capable to efficiently capture the lead (Pb) metal ions from a Pb-contaminated sandy soil. The soil properties (e.g. electrical conductivity, acidity, carbon and nitrogen content, and organic matter) were studied before and after the treatment with the CB adsorbent. I also showed a comprehensive adsorption study in soil-batch extraction experiments, evaluating a series of factors such as the effects of soil pH (pH 3.0 to pH 7.0), Pb concentration into the soil (5-100 mg/L), and the soil temperature (15-50 °C).Furthermore, the recyclability of the adsorbent was highlighted to evaluate adsorption efficiency upon use. The results of the study were remarkable where a 100 % removal efficiency of Pb ions was obtained using only a 40 ppm of the oxidized CB compared to a 60% removal efficiency when using a pristine CB at the same concentration. The adsorption capacity of Pb ions was as high as 100 mg/g at 30 mg/L of oxidized CB adsorbent. The life cycle of oxidized CB adsorbent was also remarkable compared to that of pristine adsorbent. The recyclability data of the functionalized CB has showed an easy regeneration process with an efficient reusefor 5 cycles with 30 %a performance decline of 30 % only from the initial adsorption efficiency.

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“…Some of which are conducted in situ; for instance, the method with suction cups, used by STRECK et al (2004) (with undeformed structure). And, others with deformed structure realized in laboratory: porous capsules (CARMO et al, 2016), centrifugation (DAVIES & DAVIES, 1963).…”

Section: Introductionmentioning

confidence: 99%

Centrifugation Methodology to Extract Soil Solution

Somavilla¹,

Dessbesell

Santos

2017

RSA

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Electrical Conductivity and Chemical Composition of Soil Solution: Comparison of Solution Samplers in Tropical Soils

Cited by 44 publications

References 31 publications

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

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

Efficient Removal of the Toxic Lead Ions from ContaminatedSandy Soils using Newly Engineered Carbon Black Nanoadsorbent

Centrifugation Methodology to Extract Soil Solution

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