Sorption of trace metals by suction cups of aluminium oxide, ceramic and plastics

Grossmann, J. Günter; Bredemeier, Michael; Udluft, Peter

doi:10.1002/jpln.19901530512

Cited by 20 publications

(15 citation statements)

References 10 publications

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“…Adsorption accounted for 75 ?6 of the lead added with no significant difference being between old and new cups. This confirms to the data of Grossmann et al (1990) who found lead to be the only trace metal adsorbed in significant amounts by ceramic suction cups at pH 4.…”

Section: Aluminum Activity Directly Controls Doc Concentrationsupporting

confidence: 92%

Sorption of Dissolved Organic Carbon by Ceramic P 80 Suction Cups

Guggenberger

Zech

1992

J Plant Nutrition & Soil

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Comparison is made between the chemical composition of acid soil solutions percolated through new, acid‐washed ceramic P 80 suction cups, and old, over 3 years field‐equilibrated suction cups with respect to quantitative and qualitative changes of dissolved organic carbon (DOC). While new suction cups sorb DOC in significant amounts with hydrophobic constituents preferred, field‐equilibrated suction cups alter DOC neither in concentration nor in composition. But at changes of DOC concentrations a percolation volume of 300 ml is necessary for reaching equilibrium. It is, therefore, concluded that field‐equilibrated ceramic P 80 suction cups can be used for collecting DOC from mineral B and C horizons of acid forest soils, where DOC concentrations remain constant. In contrast, the suction cups investigated are unsuitable for collecting A horizon solutions, which show greater variations in DOC concentration.

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Section: Aluminum Activity Directly Controls Doc Concentrationsupporting

confidence: 92%

Sorption of Dissolved Organic Carbon by Ceramic P 80 Suction Cups

Guggenberger

Zech

1992

J Plant Nutrition & Soil

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“…Wenzel et al (1997) found that a nylon suction cup had no effect on the heavy metal ion concentration in the solution pumped through. Grossmann et al (1990) also found that heavy metal ions did not adsorb to a nylon cup. However, Grossmann et al (1990) used 10 L of test solution to equilibrate the cups beforehand.…”

mentioning

confidence: 95%

“…Grossmann et al (1990) also found that heavy metal ions did not adsorb to a nylon cup. However, Grossmann et al (1990) used 10 L of test solution to equilibrate the cups beforehand. In a test of suction cups made of PTFE, ceramic, steel, and glass McGuire et al (1992) found that PTFE cups were the best choice for sampling heavy metal ions at low concentrations.…”

mentioning

confidence: 95%

Adsorption of Cadmium, Copper, Nickel, and Zinc to a Poly(tetrafluorethene) Porous Soil Solution Sampler

Andersen¹,

Raulund‐Rasmussen²,

Strobel³

et al. 2002

J of Env Quality

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Suction cups made of poly(tetrafluorethene) (PTFE) are widely used for sampling of soil solution. A brand (Prenart) of PTFE cups was tested for adsorption of Cd, Cu, Ni, and Zn at low concentrations under different conditions. In a laboratory experiment adsorption from a 10 microg L(-1) heavy metal solution with a 0.01 M NaCl background electrolyte was investigated at pH 3.6, 4.5, and 5.8 by pumping the solutions through the cups. The effect of three different ionic compositions was also investigated using 0.01 M CaCl2, 0.01 M NaCl, and no background electrolyte at pH 4.5. In 0.01 M NaCl electrolyte at pH 5.8 the cups acted as effective filters. At pH 3.6 after 300 mL of solution had passed through the cup, equivalence between the Cd and Ni concentrations in influent and effluent was found. No equivalence between effluent and influent concentrations was found for Zn and Cu at pH 4.5 and 5.8. With Ca as the electrolyte, no adsorption of Cd, Ni, or Zn was found. In Na electrolyte, equivalence between influent and effluent concentrations for Cd, Ni, and Zn was reached. The difference between effluent and influent concentrations of Zn, Ni, and Cd remained significant in the absence of electrolyte. For all pH values and electrolytes the difference between effluent and influent concentrations of Cu was significant. It is concluded that PTFE cups affect the concentrations of heavy metals sampled at low soil solution concentrations. Cadmium, Cu, Ni, and Zn adsorb to the cup at pH > 4.5 and low ionic strength.

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“…As a result, the cups will damp out sudden changes in solution chemistry (Hughes and Reynolds 1988). Also, the presence of dissolved organic carbon (DOC) in soil solution has a dual effect on cation sampling efficiencies (Grossmann, Bredemeier, and Udluft 1990). First, DOC is able to form complexes with cations and hence prevents cation exchange with the cup material.…”

Section: Cationsmentioning

confidence: 99%

Comparison of Ceramic and Polytetrafluoroethene/Quartz Suction Cups for Sampling Inorganic Ions in Soil Solution

Vandenbruwane

Schrijver

Geudens

et al. 2008

Communications in Soil Science and Plant Analysis

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Because the widely used ceramic cups are reported to release, adsorb, and filter dissolved nutrients from soil solution samples, inert cups made of poly(tetrafluoroethene) (PTFE) are frequently proposed as a more reliable alternative. A ceramic and a PTFE/quartz cup were compared with each other in this laboratory study. The PTFE/ quartz cup was the most suited for pH measurements. Because only the ceramic cup samples both ammonium and nitrate in a satisfactory way, this cup type is recommended for nitrogen (N) balance studies. In most cases, the ceramic cup also performed better in sampling cations [sodium (Na þ ), potassium (K þ ), calcium (Ca 2þ ), magnesium (Mg 2þ )] than the PTFE/quartz cup. Both cup types seemed inadequate to sample soil solution for aluminum (Al 3þ ) determinations. The ceramic cups released chloride (Cl 2 ) at low ion concentrations, but sulfate (SO 4 22 ) concentrations remained almost unaltered in the sample as compared to the solution outside the cup. In contrast, Cl 2 and SO 4 22 were retained by the PTFE/quartz cups. The overall conclusion of this study is that PTFE/quartz cups have no clear advantages over the more widely used ceramic

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Sorption of trace metals by suction cups of aluminium oxide, ceramic and plastics

Cited by 20 publications

References 10 publications

Sorption of Dissolved Organic Carbon by Ceramic P 80 Suction Cups

Sorption of Dissolved Organic Carbon by Ceramic P 80 Suction Cups

Adsorption of Cadmium, Copper, Nickel, and Zinc to a Poly(tetrafluorethene) Porous Soil Solution Sampler

Comparison of Ceramic and Polytetrafluoroethene/Quartz Suction Cups for Sampling Inorganic Ions in Soil Solution

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