Synthesis and surfactant modification of clinoptilolite and montmorillonite for the removal of nitrate and preparation of slow release nitrogen fertilizer

[Display omitted] ► Clinoptilolite and montmorillonite have been synthesized hydrothermally. ► SMCHDTMAB appears to be better adsorbent. ► Surfactant modification increases the adsorption capacity of silicates to retain nitrate. ► The maximum monolayer capacity for nitrate at 303K was 125.0mgg−1. ►...

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Published in:Journal of hazardous materials 2012-08, Vol.227-228, p.292-300
Main Authors: Bhardwaj, Deepesh, Sharma, Monika, Sharma, Pankaj, Tomar, Radha
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Bentonite - chemistry
bromine
Cetrimonium Compounds - chemistry
Clinoptilolite
Fertilizer
Fertilizers
Isotherms
leaching
Montmorillonite
Nitrate
Nitrates
Nitrates - chemistry
Nitrogen
nitrogen fertilizers
Nutrients
Quaternary Ammonium Compounds - chemistry
silicates
soil
sorption isotherms
Surface-Active Agents - chemistry
Surfactant
Surfactants
Synthesis
Zeolites - chemistry
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description [Display omitted] ► Clinoptilolite and montmorillonite have been synthesized hydrothermally. ► SMCHDTMAB appears to be better adsorbent. ► Surfactant modification increases the adsorption capacity of silicates to retain nitrate. ► The maximum monolayer capacity for nitrate at 303K was 125.0mgg−1. ► The adsorption data fitted well with the Langmuir and Freundlich isotherms. This article introduces the synthesis of clinoptilolite and montmorillonite, and their surfactant modification by using solutions of hexadecyltrimethylammonium bromide (CH3(CH2)15N(Br)(CH3)3, HDTMAB) and dioctadecyldimethylammonium bromide ((CH3(CH2)17)2N(Br)(CH3)2, DODMAB). The feasibility of using surfactant modified silicates (SMSs) as a potential adsorbent for nitrate and for slow release of nutrient has been investigated. Adsorption isotherms of NO3− on SMSs have been measured at aqueous concentration of 160–280mgL−1. The SMSs show much higher adsorption capacity than the unmodified materials as determined by Langmuir adsorption isotherm. The surfactant modification and increased surfactant loading concentration enhance the nitrate anion retaining capacity of silicates (montmorillonite (16.05mgg−1)
doi_str_mv 10.1016/j.jhazmat.2012.05.058
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This article introduces the synthesis of clinoptilolite and montmorillonite, and their surfactant modification by using solutions of hexadecyltrimethylammonium bromide (CH3(CH2)15N(Br)(CH3)3, HDTMAB) and dioctadecyldimethylammonium bromide ((CH3(CH2)17)2N(Br)(CH3)2, DODMAB). The feasibility of using surfactant modified silicates (SMSs) as a potential adsorbent for nitrate and for slow release of nutrient has been investigated. Adsorption isotherms of NO3− on SMSs have been measured at aqueous concentration of 160–280mgL−1. The SMSs show much higher adsorption capacity than the unmodified materials as determined by Langmuir adsorption isotherm. The surfactant modification and increased surfactant loading concentration enhance the nitrate anion retaining capacity of silicates (montmorillonite (16.05mgg−1)&lt;clinoptilolite (30.58mgg−1)&lt;DODMAB loaded clinoptilolite (75.19mgg−1)&lt;DODMAB loaded montmorillonite (76.92mgg−1)&lt;HDTMAB loaded montmorillonite (80.65mgg−1)&lt;HDTMAB loaded clinoptilolite (125.00mgg−1)). The adsorption data fitted well with the Langmuir and Freundlich isotherms. The slow nutrient release studies have been performed by thin layers-funnel analytical test and soil column percolating system. The obtained results indicate that SMSs are very good adsorbent for NO3− and a slow release of nitrogen is achievable as it releases NO3− still after 15–20 days of leaching study.</description><identifier>ISSN: 0304-3894</identifier><identifier>EISSN: 1873-3336</identifier><identifier>DOI: 10.1016/j.jhazmat.2012.05.058</identifier><identifier>PMID: 22683109</identifier><language>eng</language><publisher>Netherlands: Elsevier B.V</publisher><subject>Adsorbents ; Adsorption ; Bentonite - chemistry ; bromine ; Cetrimonium Compounds - chemistry ; Clinoptilolite ; Fertilizer ; Fertilizers ; Isotherms ; leaching ; Montmorillonite ; Nitrate ; Nitrates ; Nitrates - chemistry ; Nitrogen ; nitrogen fertilizers ; Nutrients ; Quaternary Ammonium Compounds - chemistry ; silicates ; soil ; sorption isotherms ; Surface-Active Agents - chemistry ; Surfactant ; Surfactants ; Synthesis ; Zeolites - chemistry</subject><ispartof>Journal of hazardous materials, 2012-08, Vol.227-228, p.292-300</ispartof><rights>2012 Elsevier B.V.</rights><rights>Copyright © 2012 Elsevier B.V. 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This article introduces the synthesis of clinoptilolite and montmorillonite, and their surfactant modification by using solutions of hexadecyltrimethylammonium bromide (CH3(CH2)15N(Br)(CH3)3, HDTMAB) and dioctadecyldimethylammonium bromide ((CH3(CH2)17)2N(Br)(CH3)2, DODMAB). The feasibility of using surfactant modified silicates (SMSs) as a potential adsorbent for nitrate and for slow release of nutrient has been investigated. Adsorption isotherms of NO3− on SMSs have been measured at aqueous concentration of 160–280mgL−1. The SMSs show much higher adsorption capacity than the unmodified materials as determined by Langmuir adsorption isotherm. The surfactant modification and increased surfactant loading concentration enhance the nitrate anion retaining capacity of silicates (montmorillonite (16.05mgg−1)&lt;clinoptilolite (30.58mgg−1)&lt;DODMAB loaded clinoptilolite (75.19mgg−1)&lt;DODMAB loaded montmorillonite (76.92mgg−1)&lt;HDTMAB loaded montmorillonite (80.65mgg−1)&lt;HDTMAB loaded clinoptilolite (125.00mgg−1)). The adsorption data fitted well with the Langmuir and Freundlich isotherms. The slow nutrient release studies have been performed by thin layers-funnel analytical test and soil column percolating system. The obtained results indicate that SMSs are very good adsorbent for NO3− and a slow release of nitrogen is achievable as it releases NO3− still after 15–20 days of leaching study.</description><subject>Adsorbents</subject><subject>Adsorption</subject><subject>Bentonite - chemistry</subject><subject>bromine</subject><subject>Cetrimonium Compounds - chemistry</subject><subject>Clinoptilolite</subject><subject>Fertilizer</subject><subject>Fertilizers</subject><subject>Isotherms</subject><subject>leaching</subject><subject>Montmorillonite</subject><subject>Nitrate</subject><subject>Nitrates</subject><subject>Nitrates - chemistry</subject><subject>Nitrogen</subject><subject>nitrogen fertilizers</subject><subject>Nutrients</subject><subject>Quaternary Ammonium Compounds - chemistry</subject><subject>silicates</subject><subject>soil</subject><subject>sorption isotherms</subject><subject>Surface-Active Agents - chemistry</subject><subject>Surfactant</subject><subject>Surfactants</subject><subject>Synthesis</subject><subject>Zeolites - chemistry</subject><issn>0304-3894</issn><issn>1873-3336</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNqNkstqHDEQRUVIiCd2PiFJL7PpiR4ttXoVgskLDF7YXgu1umRrUEsdSWNjf0q-NhrPxFsbCgTFubeKukLoA8Frgon4sllvbvTDrMuaYkLXmNeSr9CKyJ61jDHxGq0ww13L5NAdoXc5bzDGpOfdW3REqZCM4GGF_l7ch3ID2eVGh6nJ22S1KTqUZo6Ts87o4mJoom2MdyEuxfnoXYFHeo6hzDE572PY9WxMTTVrEszxVvudqvaTPuBLgkWnJ8Ps411FPegMj1y8htBYSHWGe4B0gt5Y7TO8P7zH6PLH98vTX-3Z-c_fp9_OWtNxXtqpkz0ndmSEj0x2QMk4iZFx3RM-UTtINkpDLO61wcZyIkY-WM4nxjos9MiO0ee97ZLiny3komaXDXivA8RtVqQXlNABS_w8imknRF8P-xKU0YHToaso36MmxZwTWLUkN-t0XyG1y1pt1CFrtctaYV5LVt3Hw4jtOMP0pPofbgU-7QGro9LXyWV1dVEdeP0HAxecVOLrnoB631sHSWXjIBiYXAJT1BTdM0v8A1FZygw</recordid><startdate>20120815</startdate><enddate>20120815</enddate><creator>Bhardwaj, Deepesh</creator><creator>Sharma, Monika</creator><creator>Sharma, Pankaj</creator><creator>Tomar, Radha</creator><general>Elsevier B.V</general><scope>FBQ</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>7U7</scope><scope>C1K</scope><scope>7QQ</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>FR3</scope><scope>JG9</scope><scope>KR7</scope></search><sort><creationdate>20120815</creationdate><title>Synthesis and surfactant modification of clinoptilolite and montmorillonite for the removal of nitrate and preparation of slow release nitrogen fertilizer</title><author>Bhardwaj, Deepesh ; 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This article introduces the synthesis of clinoptilolite and montmorillonite, and their surfactant modification by using solutions of hexadecyltrimethylammonium bromide (CH3(CH2)15N(Br)(CH3)3, HDTMAB) and dioctadecyldimethylammonium bromide ((CH3(CH2)17)2N(Br)(CH3)2, DODMAB). The feasibility of using surfactant modified silicates (SMSs) as a potential adsorbent for nitrate and for slow release of nutrient has been investigated. Adsorption isotherms of NO3− on SMSs have been measured at aqueous concentration of 160–280mgL−1. The SMSs show much higher adsorption capacity than the unmodified materials as determined by Langmuir adsorption isotherm. The surfactant modification and increased surfactant loading concentration enhance the nitrate anion retaining capacity of silicates (montmorillonite (16.05mgg−1)&lt;clinoptilolite (30.58mgg−1)&lt;DODMAB loaded clinoptilolite (75.19mgg−1)&lt;DODMAB loaded montmorillonite (76.92mgg−1)&lt;HDTMAB loaded montmorillonite (80.65mgg−1)&lt;HDTMAB loaded clinoptilolite (125.00mgg−1)). The adsorption data fitted well with the Langmuir and Freundlich isotherms. The slow nutrient release studies have been performed by thin layers-funnel analytical test and soil column percolating system. The obtained results indicate that SMSs are very good adsorbent for NO3− and a slow release of nitrogen is achievable as it releases NO3− still after 15–20 days of leaching study.</abstract><cop>Netherlands</cop><pub>Elsevier B.V</pub><pmid>22683109</pmid><doi>10.1016/j.jhazmat.2012.05.058</doi><tpages>9</tpages></addata></record>
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identifier ISSN: 0304-3894
ispartof Journal of hazardous materials, 2012-08, Vol.227-228, p.292-300
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1873-3336
language eng
recordid cdi_proquest_miscellaneous_1762129080
source ScienceDirect Freedom Collection 2022-2024
subjects Adsorbents
Adsorption
Bentonite - chemistry
bromine
Cetrimonium Compounds - chemistry
Clinoptilolite
Fertilizer
Fertilizers
Isotherms
leaching
Montmorillonite
Nitrate
Nitrates
Nitrates - chemistry
Nitrogen
nitrogen fertilizers
Nutrients
Quaternary Ammonium Compounds - chemistry
silicates
soil
sorption isotherms
Surface-Active Agents - chemistry
Surfactant
Surfactants
Synthesis
Zeolites - chemistry
title Synthesis and surfactant modification of clinoptilolite and montmorillonite for the removal of nitrate and preparation of slow release nitrogen fertilizer
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