Alkali-Activated Potassium Persulfate Treatment of Sugarcane Filter Cake for the Rapid Production of Fulvic-like-Acid Fertilizer
Alkali-Activated Potassium Persulfate Treatment of Sugarcane Filter Cake for the Rapid Production of Fulvic-like-Acid Fertilizer
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DOI：
10.1021/acssuschemeng.3c03511
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发表时间：
2023-09-01
影响因子：
8.4
通讯作者：
Wang，Dongfang
中科院分区：
文献类型：
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作者：
Cai，Dongqing;Kong，Xianghai;Wang，Dongfang
近年来，碱活化过硫酸钾（PS）处理被证明是一种很有前途的高级氧化工艺。然而，大多数研究都集中在水污染控制和修复过程。利用聚苯乙烯将有机固体废物转化为资源的报道很少。以甘蔗滤饼为原料，用氢氧化钙（CH）活化PS，将其转化为富含类富里酸（弗拉）的有机肥料（CH-PS/SFC）。CH-PS/SFC还可用于酸性土壤和重金属污染土壤的修复。由于SFC结构简单，蔗糖含量高，采用蔗糖饱和溶液进行CH-PS处理，2 h后产量达到785.7mg/g。在最佳条件下，在CH-PS/SFC中弗拉的产量可达316.8mg/g，随后作为肥料使用，发芽指数超过80%，HMs的可吸收性降低。此外，腐殖化过程中最高温度为80.3 °C，土壤含水量降低20%。盆栽试验表明，CH-PS/SFC能促进白菜生长，降低黄叶率，减少白菜对HMs的吸收。
In recent years, alkali activation for potassium persulfate (PS) treatment has been proven a promising method in the advanced oxidation processes. However, the majority of studies have focused on water pollution control and remediation processes. There are few reports on the application of PS to transform organic solid waste into a resource. In this study, the sugarcane filter cake (SFC) was treated with PS activated by calcium hydroxide (CH) to convert it into an organic fertilizer (CH-PS/SFC) with high amounts of fulvic-like acid (FLA). CH-PS/SFC could also be used to remediate the acid soil and immobilize heavy metals (HMs). Due to the simple structure and high sucrose content of SFC, the sucrose-saturated solution was to investigate the CH-PS treatment and the result was the production of a large amount of (785.7 mg/g) after 2 h. In optimal conditions, the yield of FLA in CH-PS/SFC could reach 316.8 mg/g, and the subsequent use as a fertilizer offered a germination index of over 80% and a decrease in the leachability of HMs. In addition, in the humification the maximum temperature was found to be 80.3 °C and the moisture decreased by 20% during the humification of SFC. Furthermore, pot experiments showed that CH-PS/SFC could promote Chinese cabbage growth, decrease the yellow leaves rate, and decrease the absorption of HMs by Chinese cabbage.