Sugarcane filtrate mud hour-level humification to remediate Cd(II)-contaminated acidic soil

IF 5.7 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Surfaces and Interfaces Pub Date : 2025-04-27 DOI:10.1016/j.surfin.2025.106562

Dongqing Cai , Chen Sun , Yuqi Zhu , Pengjin Zhu , Lei Li , Xianghai Kong , Qicheng Chen , Xiaofeng Lu , Yan Qin , Yanping Zhu , Pan Zhao , Dongfang Wang

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引用次数: 0

Abstract

Acidic soil (AS) has a severe effect on crop growth and human health, becoming an urgent issue in agriculture field. In this work, an acidic soil remediation agent (ASRA) was developed based on humified-sugarcane filtrate mud (SFM) and red mud (RM). Therein, hour-level humification of SFM was realized in one hour by degradation-polymerization reactions induced by •O₂⁻, ¹O₂, SO₄²⁻•, and •OH generated from calcium hydroxide-activated sodium persulfate, fabricating an organic fertilizer rich in fulvic-like acid (FLA). To improve pH of AS, RM (pH 13.2) was added to the organic fertilizer to obtain ASRA. The as-prepared ASRA could significantly decrease dissolved divalent cadmium (Cd(II)) content in AS through hydrogen-bond, chelation, and precipitation interactions. In addition, pot experiment proved ASRA could remarkably increase AS pH, promote corn growth, and reduce Cd uptake. Therefore, this study provides a high-efficiency and simple method for SFM and RM recycling and remediation of Cd(II)-contaminated AS, which shows a huge application prospect.

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甘蔗滤液污泥小时级腐殖质化修复镉污染酸性土壤

酸性土壤严重影响作物生长和人体健康，已成为农业领域亟待解决的问题。以湿化甘蔗滤液泥（SFM）和赤泥（RM）为原料，研制了酸性土壤修复剂（ASRA）。其中，通过氢氧化钙活化的过硫酸钠生成的•O2−、1O2、SO42−•和•OH诱导的降解聚合反应，在1小时内实现了SFM的小时级腐殖质化，制备出富含黄腐酸（FLA）的有机肥。为了提高AS的pH值，在有机肥中加入pH为13.2的RM，得到ASRA。制备的ASRA可以通过氢键、螯合和沉淀相互作用显著降低AS中溶解二价镉（Cd(II)）的含量。盆栽试验表明，ASRA能显著提高土壤pH值，促进玉米生长，降低镉吸收。因此，本研究为SFM和RM回收和修复Cd（II）污染AS提供了一种高效、简便的方法，具有巨大的应用前景。

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来源期刊

Surfaces and Interfaces Chemistry-General Chemistry

CiteScore

8.50

自引率

6.50%

发文量

753

审稿时长

35 days

期刊介绍： The aim of the journal is to provide a respectful outlet for ''sound science'' papers in all research areas on surfaces and interfaces. We define sound science papers as papers that describe new and well-executed research, but that do not necessarily provide brand new insights or are merely a description of research results. Surfaces and Interfaces publishes research papers in all fields of surface science which may not always find the right home on first submission to our Elsevier sister journals (Applied Surface, Surface and Coatings Technology, Thin Solid Films)