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Study on preparation of different iron-based biochar and its adsorption property for Sb(III)
- Low-Carbon Chemistry and Chemical Engineering Vol. 50, Issue 4, Pages: 80-89(2025)
- 作者机构：
1.南京工业大学 环境科学与工程学院，江苏 南京 211816
2.江苏开放大学 环境生态学院，江苏 南京 210017
- 作者简介：
- 基金信息：
DOI：10.12434/j.issn.2097-2547.20240376
CLC： TQ424.1;X703Received：05 September 2024，
Revised：2024-10-14，
Published：25 April 2025
- 稿件说明：
移动端阅览
王琴,黄兆琴,吉栋梁等.不同铁基生物炭的制备及其对Sb(Ⅲ)吸附特性研究[J].低碳化学与化工,2025,50(04):80-89.
WANG Qin,HUANG Zhaoqin,JI Dongliang,et al.Study on preparation of different iron-based biochar and its adsorption property for Sb(III)[J].Low-Carbon Chemistry and Chemical Engineering,2025,50(04):80-89.
王琴,黄兆琴,吉栋梁等.不同铁基生物炭的制备及其对Sb(Ⅲ)吸附特性研究[J].低碳化学与化工,2025,50(04):80-89. DOI： 10.12434/j.issn.2097-2547.20240376.
WANG Qin,HUANG Zhaoqin,JI Dongliang,et al.Study on preparation of different iron-based biochar and its adsorption property for Sb(III)[J].Low-Carbon Chemistry and Chemical Engineering,2025,50(04):80-89. DOI： 10.12434/j.issn.2097-2547.20240376.
摘要
锑（Sb）污染问题日益严重，探寻一种高效可行的含Sb废水治理方法至关重要。以互花米草和梧桐树皮为原材料，筛选得到优选生物炭（FSC300和FMC400），运用EA、N
2
吸/脱附、SEM、FT-IR和XRD等技术对不同生物炭的理化性质进行了表征，并对优选生物炭及相应热解温度制备所得初始生物炭的Sb(Ⅲ)吸附动力学和等温吸附特征进行了研究。结果表明，FSC300表面含氧量高且极性强，FMC400含碳量高且芳香性强。相较于初始生物炭，FSC300、FMC400比表面积分别增大了1.35倍、1.10倍，且FSC300和FMC400均成功负载了Fe
3
O
4
及FeOOH。当含锑废水pH值为5、生物炭投加量为2.5 g/L时，FSC300和FMC400的Sb(Ⅲ)吸附容量分别提高至20.81 mg/g和22.06 mg/g，相较初始生物炭分别提高了1.63倍和1.78倍。生物炭Sb(Ⅲ)吸附过程与Langmuir模型和准二级动力学模型相符，主要为单层化学吸附，其吸附机理包括物理吸附、表面络合和离子交换。
Abstract
The increasingly serious issue of antimony (Sb) pollution makes it crucial to search for an efficient and feasible method to treat Sb-containing wastewater. The Spartina alterniflora and Sycamore bark were used as raw materials to s
creen for the preferred biochar (FSC300 and FMC400)
and EA
N
2
adsorption/desorption
SEM
FT-IR and XRD techniques were used to characterize the surface physical and chemical properties of different biochar. The Sb(Ⅲ) adsorption kinetics and isothermal adsorption characteristics of preferred biochar and pristine biochar prepared at corresponding pyrolysis temperature were also studied. The results show that FSC300 has a high surface oxygen content and strong polarity
while FMC400 has a high carbon content and strong aromaticity. Compared to the pristine biochar
the specific surface areas of FSC300 and FMC400 increase by 1.35 and 1.10 times
respectively. FSC300 and FMC400 successfully load Fe
3
O
4
and FeOOH. When the pH value of Sb-containing wastewater is 5 and the biochar dosage is 2.5 g/L
the Sb(III) adsorption capacities of FSC300 and FMC400 increase to 20.81 mg/g and 22.06 mg/g
which are 1.63 and 1.78 times higher than the initial biochar respectively. The adsorption process of Sb(Ⅲ) fits the Langmuir model and quasi-second-order kinetic model
mainly as monolayer chemical adsorption. The adsorption mechanisms include physical adsorption
surface complexation and ion exchange.
关键词
Keywords
references
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