Adsorption of Phosphate and Nitrate Using Modified Spent Coffee Ground and Its Application as an Alternative Nutrient Source for Plant Growth

• 作者: Aisyah Humayro Hiroyuki Harada Kanako Naito
• 来源期刊: 农业化学和环境(英文)
• 学科: 工学
• 关键词: Spent Coffee Ground ADSORPTION Calsium Hydroxide Phosphate and Nitrate Plant Growth
• 年，卷（期）: nyhxhhjyw_2021,（1）
• 页码范围: 80-90
• 页数: 11页
• 分类号: TS9

摘要

Phosphate (PO₄<sup style="margin-left:-9px;">3-</sup><span style="font-family:Verdana;">) and Nitrate (NO₃<sup style="margin-left:-9px;">-</sup></span><span style="font-family:Verdana;">) are two main nutrients that cause wa</span><span style="font-family:Verdana;">ter eutrophication. In the other hand, the presence of PO₄<sup style="margin-left:-9px;">3-</sup></span><span style="font-family:Verdana;"> </span><span style="font-family:Verdana;">and NO₃<sup style="margin-left:-9px;">-</sup></span><span style="font-family:Verdana;"> is </span><span style="font-family:Verdana;">needed for plant growth. The aims of this study </span><span style="font-family:Verdana;">are </span><span style="font-family:Verdana;">to recycl</span><span style="font-family:Verdana;">e</span><span style="font-family:Verdana;"> Spent Coffee Ground (SCG) modified with calcium hydroxide for adsorption PO₄<sup style="margin-left:-9px;">3-</sup></span><span style="font-family:Verdana;"> </span><span style="font-family:Verdana;">and NO₃<sup style="margin-left:-9px;">-</sup></span><span style="font-family:Verdana;">. The optimum adsorption capacity for PO₄<sup style="margin-left:-9px;">3-</sup></span><span style="font-family:Verdana;"> </span><span style="font-family:Verdana;">and NO₃<sup style="margin-left:-9px;">-</sup></span><span style="font-family:Verdana;"> is 36.74 mg/L and 20.21 mg/L, respectively. The Freundlich isotherm model was suitable for PO₄<sup style="margin-left:-9px;">3-</sup></span><span style="font-family:Verdana;"> </span><span style="font-family:Verdana;">and NO₃<sup style="margin-left:-9px;">-</sup></span><span style="font-family:Verdana;"> adsorption. The kinetic model for adsorption was linear using Pseudo-second order. The application of modified SCG after enrich</span><span style="font-family:Verdana;">ment with PO₄<sup style="margin-left:-9px;">3-</sup></span><span style="font-family:Verdana;