松枝生物炭对Cd污染土壤钝化修复的研究

全文下载： 202202005.pdf

文章编号： 1672-6987（2022）02-0032-07； DOI： 10.16351/j.1672-6987.2022.02.005

王鲁兴a, 纪晓阳a, 邓晓燕a*, 戴冬梅b(青岛科技大学 a.环境与安全工程学院； b.化学与分子工程学院,山东 青岛 266042)

摘要： 以松枝为原料，采用350 ℃限氧热裂解法制备生物炭，利用元素分析、SEM-EDS、BET-N2、FT-IR、Boehm滴定等分析方法对生物炭进行表征。结果表明:松枝生物炭为多孔结构、平均孔径为810 nm、比表面积为174 m2·g-1，表面含有—CO、—OH等含氧官能团。通过盆栽实验，研究松枝生物炭对土壤Cd形态转化及绿豆植株对Cd富集吸收的影响。结果表明:生物炭可提高土壤pH和有机质含量，同时降低土壤弱酸提取态Cd的含量，促进Cd由活性高的弱酸提取态向活性低的残渣态转化，显著降低Cd的生物有效性；施用生物炭可提高绿豆生物量，生物炭5%处理效果最佳，最大提高1347%；绿豆地上部、地下部Cd含量均显著降低，生物炭5%处理降幅最大，分别为8186%和4386%。

关键词： 松枝生物炭； Cd； 土壤修复； 绿豆

中图分类号： X 131.3文献标志码： A

引用格式： 王鲁兴, 纪晓阳, 邓晓燕, 等. 松枝生物炭对Cd污染土壤钝化修复的研究［J］. 青岛科技大学学报(自然科学版), 2022, 43(2): 32-38.

WANG Luxing, JI Xiaoyang, DENG Xiaoyan, et al. Study on the passivation remediation of cadmium-contaminated soil by pine branch biochar［J］. Journal of Qingdao University of Science and Technology（Natural Science Edition), 2022， 43（2）： 32-38.

Study on the Passivation Remediation of Cadmium-contaminated

Soil by Pine Branch Biochar

WANG Luxinga, JI Xiaoyanga, DENG Xiaoyana, DAI Dongmeib

(a.College of Environment and Safety Engineering；b.College of Chemical and Molecular Engineering,

Qingdao University of Science and Technology, Qingdao 266042, China)

Abstract: Biochar were generated from pine branch at 350 ℃ by oxygen-limited pyrolysis, and its surface characteristics were investigated using element analysis, SEM-EDS, BET-N2, FT-IR, Boehm titration and other analytical methods. The results showed that the biochar had a porous structure with an average pore size of 810 nm and a specific surface area of 174 m2·g-1. The surface contained oxygen-containing functional groups such as —CO, —OH. Pot experiments were conducted to investigate the effects of biochar on the fraction transformations of soil Cd and uptake by mung bean. The results showed that biochar increased soil pH and organic matter content. The application of biochar could reduce extractable Cd concentration, and promote transformation of acid extracted Cd into residual fractions, resulting in significant reduction of Cd bioavailability and mobility. Addition of biochar increased the biomass of mung bean. The effect of biochar 5% treatment was the most significant, where the biomass increased by 1347% as compared with no biochar. The content of Cd in the shoot and underground parts of mung bean decreased significantly. And the decrease of biochar 5% treatment was the largest, reaching 8186% and 4386% respectively.

Key words: pine branch biochar; Cd; soil remediation; mung bean

收稿日期： 2021-03-19

基金项目： 国家自然科学基金项目（41573103）；山东省重点研发计划项目（2018GSF117007,2018GGX102004）.

作者简介： 王鲁兴（1995—），男，硕士研究生.*通信联系人.