Influences of clinoptilolite and surfactant-modified clinoptilolite zeolite on nitrate leaching and plant growth

2011 ◽  
Vol 185 (2-3) ◽  
pp. 970-976 ◽  
Author(s):  
Raheleh Malekian ◽  
Jahangir Abedi-Koupai ◽  
Sayed Saeid Eslamian
Keyword(s):  
Plant Growth ◽  
Nitrate Leaching ◽  
Clinoptilolite Zeolite ◽  
Modified Clinoptilolite

Effective adsorption of metal ions by modified clinoptilolite zeolite from simulated radioactive solution

2019 ◽  
Vol 319 (3) ◽  
pp. 1069-1081 ◽  
Author(s):  
Qun Luo ◽  
Dingwen Jiang ◽  
Dengyong Hou ◽  
Wei Chen ◽  
Xiuting Hu ◽  
...  
Keyword(s):  
Metal Ions ◽  
Adsorption Of Metal Ions ◽  
Clinoptilolite Zeolite ◽  
Modified Clinoptilolite

Effects of modified clinoptilolite on phosphorus mobilisation and potassium or ammonium release in Ferrosols

Soil Research ◽  
2006 ◽  
Vol 44 (3) ◽  
pp. 285 ◽  
Author(s):  
Q. X. Hua ◽  
J. M. Zhou ◽  
H. Y. Wang ◽  
C. W. Du ◽  
X. Q. Chen ◽  
...  
Keyword(s):  
Plant Growth ◽  
Soil Nutrient ◽  
Nutrient Concentrations ◽  
P Availability ◽  
Adsorption And Desorption ◽  
Modified Clinoptilolite ◽  
Positive Effect ◽  
Phosphorus Solubility

An investigation was conducted to study effects of the potassium and ammonium saturated clinoptilolite on P availability in Ferrosols. The adsorption and desorption of phosphorus were determined by shaking 2.5 g soil with 0, 0.5, and 2.5 g clinoptilolite at 0.31 or 1.25 mg P/g soil in 50 mL solution for a total of 72 h (24 h for clinoptilolite and 48 h for phosphate). The nutrient concentrations in supernatants were measured by spectrophotometry. Results showed phosphorus solubility was significantly increased with clinoptilolite addition. Increasing the amount of clinoptilolite enhanced the concentration of P up to 6.85 and 41.29 mg/L at 0.31 and 1.25 mg P/g soil, respectively. Correspondingly, the amount of potassium and ammonium released from the clinoptilolite were up to 63.69 and 12.20 mg/L at 0.31 mg P/g soil, and 107.42 and 29.94 mg/L at 1.25 mg P/g soil. Nutrient concentrations in the treatments in which clinoptilolite was added before P were greater than that in the treatments in which P was added prior to clinoptilolite. The results also suggest that potassium and ammonium saturated clinoptilolite can increase P solubility while providing K and NH4 to the soil, a concurrent positive effect for plant growth.

Laboratory investigation of arsenic removal from the aquatic environment using nano adsorbents extracted from native zeolite

2021 ◽  
pp. 1-11
Author(s):  
Saeed Mousavi Moghanjooghi ◽  
Shahrzad Khoramnejadian ◽  
Ebrahim Fataei ◽  
Ali Asghar Monsan
Keyword(s):  
Aqueous Solution ◽  
Sodium Chloride ◽  
Ionic Strength ◽  
Structural Analysis ◽  
Contact Time ◽  
Arsenic Removal ◽  
Low Cost ◽  
Ctab Concentration ◽  
Clinoptilolite Zeolite ◽  
Modified Clinoptilolite

The presence of arsenic in water is a major problem in communities due to its toxicity and hazard. The aim of this study was to evaluate the removal efficiency of arsenic by CTAB-modified clinoptilolite zeolite from aqueous solution. The effect of contact time, pH, ionic strength, zeolite dose and CTAB concentration on arsenic removal were investigated. Structural analysis of XRD showed that the adsorbent used in this study was composed of clinoptilolite due to three strong peaks in 9.8, 22 and 27 degrees with intervals of 8.9, 3.9 and 3.1. Optimum condition for effective adsorption were obtained at pH = 3, zeolite dose of 5 g L–1, CTAB concentration of 5 mM, ionic strength of 0.1 M sodium chloride and contact time of 10 minutes. This study suggested that, the CTAB modified zeolite can be used as an effective and inexpensive adsorbent to remove arsenic from aqueous solutions, since it is a low-cost, abundant and locally available.

Sign in / Sign up

Export Citation Format

Share Document