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Hydrothermal Fabrication of Zirconium Oxyhydroxide Capped Chitosan/Kaolin Framework for Highly Selective Nitrate and Phosphate Retention
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-10-17 , DOI: 10.1021/acs.iecr.8b01859 Ilango Aswin Kumar 1 , Natrayasamy Viswanathan 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-10-17 , DOI: 10.1021/acs.iecr.8b01859 Ilango Aswin Kumar 1 , Natrayasamy Viswanathan 1
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In recent years, hydrothermal technology has been paid more attention because of its unique advantages like large surface area and high porous nature. In the present study, chitosan (CS) embedded kaolin (KN) clay, namely, CSKN composite, was prepared. To enhance the sorption capacity (SC) and selectivity, zirconium oxyhydroxide (ZrO(OH)2) was coated onto CSKN composite to get Zr@CSKN composite using in situ precipitation (In situ) and hydrothermal (Hydro) methods. The developed Zr@CSKN composite was used toward nitrate and phosphate removal, which helps in the minimization of methemoglobinemia (blue baby syndrome) and eutrophication. The adsorbents were characterized using FTIR, XRD, SEM, BET, and EDAX with mapping analysis. Various adsorption influencing factors like contact time, adsorbent dosage, pH, co-anions, initial ion concentration, and temperature were optimized. The experimental data was fitted with various isotherms and thermodynamic parameters to find the nature of adsorption. The reuse and field studies of Zr@CSKN composite were also examined.
中文翻译：
水热法制备羟基氧化锆壳聚糖/高岭土骨架，以高选择性地保留硝酸盐和磷酸盐
近年来，水热技术因其独特的优势（如大表面积和高多孔性）而受到越来越多的关注。在本研究中，制备了壳聚糖（CS）嵌入的高岭土（KN）粘土，即CSKN复合材料。为了提高吸附能力（SC）和选择性，羟基氧化锆（ZrO（OH）2用原位沉淀（Insitu）和水热（Hydro）方法将其涂覆到CSKN复合材料上以得到Zr @ CSKN复合材料。研发的Zr @ CSKN复合材料用于去除硝酸盐和磷酸盐，有助于最大程度地减少高铁血红蛋白血症（蓝婴儿综合症）和富营养化。吸附剂使用FTIR，XRD，SEM，BET和EDAX进行特征分析。优化了各种吸附影响因素，如接触时间，吸附剂用量，pH，共阴离子，初始离子浓度和温度。将实验数据与各种等温线和热力学参数进行拟合，以发现吸附的性质。还检查了Zr @ CSKN复合材料的重复使用和现场研究。
更新日期：2018-10-18
中文翻译：
水热法制备羟基氧化锆壳聚糖/高岭土骨架，以高选择性地保留硝酸盐和磷酸盐
近年来，水热技术因其独特的优势（如大表面积和高多孔性）而受到越来越多的关注。在本研究中，制备了壳聚糖（CS）嵌入的高岭土（KN）粘土，即CSKN复合材料。为了提高吸附能力（SC）和选择性，羟基氧化锆（ZrO（OH）2用原位沉淀（Insitu）和水热（Hydro）方法将其涂覆到CSKN复合材料上以得到Zr @ CSKN复合材料。研发的Zr @ CSKN复合材料用于去除硝酸盐和磷酸盐，有助于最大程度地减少高铁血红蛋白血症（蓝婴儿综合症）和富营养化。吸附剂使用FTIR，XRD，SEM，BET和EDAX进行特征分析。优化了各种吸附影响因素，如接触时间，吸附剂用量，pH，共阴离子，初始离子浓度和温度。将实验数据与各种等温线和热力学参数进行拟合，以发现吸附的性质。还检查了Zr @ CSKN复合材料的重复使用和现场研究。
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