| 陈碧,谢欣欣,莫辉旺,蒋旺程,王小明.活性炭负载氢氧化钙协同调控甘蔗田pH和Cd吸附[J].农业环境科学学报,2026,45(5):1148-1156. |
| 活性炭负载氢氧化钙协同调控甘蔗田pH和Cd吸附 |
| Synergistic regulation of soil pH in sugarcane fields and Cd adsorption by an activated carbon-calcium hydroxide composite |
| 投稿时间：2025-07-28 |
| DOI：10.11654/jaes.2025-0722 |
| 中文关键词: 活性炭复合材料 土壤酸度调控 有效态Cd 协同效应 |
| 英文关键词: activated carbon composite material adjustment of soil acidity bioavailable Cd synergistic effect |
| 基金项目:广西糖资源工程技术研究中心（桂科AD16450040）；广西高校制糖工程综合技术重点实验室（桂教科研〔2016〕6号）；广西科技师范学院科研基金项目（GXKS2023ZDB010）；大学生创新创业训练计划项目（S202211546073）；食品资源与生物大健康技术创新中心（GXKSKYPT2025010） |
| 作者 | 单位 | E-mail | | 陈碧 | 广西科技师范学院, 生物与食品工程学院, 广西 来宾 546199
广西科技师范学院糖料蔗绿色高效生产技术重点实验室, 广西 来宾 546199 | | | 谢欣欣 | 广西科技师范学院, 生物与食品工程学院, 广西 来宾 546199 | | | 莫辉旺 | 广西科技师范学院, 生物与食品工程学院, 广西 来宾 546199 | | | 蒋旺程 | 广西科技师范学院, 生物与食品工程学院, 广西 来宾 546199 | | | 王小明 | 广西科技师范学院, 生物与食品工程学院, 广西 来宾 546199
广西科技师范学院糖料蔗绿色高效生产技术重点实验室, 广西 来宾 546199 | wxm081@163.com |
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| 中文摘要: |
| 针对甘蔗土壤酸化及Cd污染问题，本研究以活性炭为载体，制备了多孔活性炭负载氢氧化钙复合材料[AC&Ca (OH)2]。采用红外光谱(FTIR)、扫描电子显微镜(SEM)、比表面积与孔径分析(BET)等技术手段对材料进行了系统的理化特性表征，并进一步探究了氢氧化钙负载比例和AC&Ca (OH)2复合材料添加量对土壤pH及有效态Cd含量的影响。结果表明：所制备的AC&Ca (OH)2复合材料成功负载了氢氧化钙，具备丰富的表面活性位点。当活性炭与氢氧化钙负载比为1∶0.5、AC&Ca (OH)2复合材料添加量为2.0%时，土壤pH由4.35±0.01升高至7.23±0.02，有效态Cd的去除率达到39.4%±1.0%，此时土壤环境处于甘蔗适宜生长的pH范围，且有效态Cd含量显著降低。吸附动力学与等温线分析表明，AC&Ca (OH)2对土壤中Cd的吸附符合准二级动力学模型(R2>0.99)和Freundlich等温吸附模型(R2>0.97)，说明该吸附过程主要受化学吸附机制主导，并呈现多层异质表面的吸附特征。研究表明，本研究开发制备的AC&Ca (OH)2复合材料可应用于土壤酸化及Cd污染的协同治理。 |
| 英文摘要: |
| To address the concurrent issues of soil acidification and Cd contamination in sugarcane fields, a porous calcium-hydroxideloaded activated-carbon composite(AC&Ca(OH)2)was developed using commercial activated carbon as a support. The structure and morphology of the composite were systematically characterized using Fourier transform infrared(FTIR)spectroscopy, scanning electron microscopy(SEM), and Brunauer-Emmett-Teller(BET)surface area and porosity analysis. Furthermore, the effects of the calcium hydroxide loading in the composite and the composite dosage on soil pH and bioavailable Cd concentration were examined. Results indicate that the AC&Ca(OH)2 composite successfully incorporated calcium hydroxide and exhibited abundant surface-active sites. At a mass ratio of activated carbon to calcium hydroxide of 1∶0.5 with an addition amount of 2.0%, the soil pH increased from 4.35±0.01 to 7.23±0.02, and the removal rate of bioavailable Cd reached 39.4%± 1.0%. Under these optimal conditions, the soil pH fell within the optimal range for sugarcane growth, and the bioavailable Cd content was significantly reduced. Adsorption kinetics and isotherm analyses demonstrated that Cd adsorption by AC&Ca(OH)2 followed the pseudo-second-order kinetic model(R2>0.99)and the Freundlich isotherm model(R2>0.97), indicating that the adsorption process was primarily governed by chemisorption mechanisms and exhibited multilayer heterogeneous surface adsorption characteristics. The AC&Ca(OH)2 composite and its application strategy presented in this study provide an effective approach for the co-remediation of Cd-contaminated acidic soils. |
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