Biochar reduces uptake and accumulation of polycyclic aromatic hydrocarbons (PAHs) in winter wheat on a PAH-contaminated soil

生物炭 化学 环境化学 根际 木炭 土壤水分 环境修复 稻草 污染 土壤污染 农学 热解 环境科学 土壤科学 生物 细菌 无机化学 生态学 有机化学 遗传学
作者
Jinfeng Wang,Huanyu Bao,Yu Bon Man,Jun Cai,Jia Li,Benhua Sun,Fuyong Wu
出处
期刊:Pedosphere [Elsevier BV]
卷期号:33 (6): 938-947 被引量:5
标识
DOI:10.1016/j.pedsph.2023.01.005
摘要

For years, biochar has been successfully used for the remediation of polycyclic aromatic hydrocarbons (PAHs) in contaminated soils, not only for improving their removal from soil but also for reducing their uptake by crops. However, the underlying mechanism of biochar application reducing PAH uptake and accumulation in winter wheat remains unclear. Pot trials were conducted on a PAH-contaminated soil amended with bamboo biochar, coconut shell biochar, and maize straw biochar (MSB) for an entire growth period of winter wheat. Compared with no biochar control (CK), application of the three types of biochar significantly (P < 0.01) reduced grain PAH concentration, total equivalent concentration (TEC), and incremental lifetime cancer risk (ILCR), indicating that biochar application, especially MSB, reduced the risk of exposure to PAHs in wheat grain. Furthermore, all three types of biochar significantly (P < 0.05) reduced PAH uptake and accumulation in wheat roots and stems, probably because biochar application enhanced the degradation of PAHs in the rhizosphere soil. Compared with CK, application of the three types of biochar significantly (P < 0.05) reduced the concentration of PAHs in the rhizosphere soil by 15.9%–33.7%. It was found that the degradation rate of high-molecular-weight (HMW) PAHs (5- and 6-ring PAHs) was significantly (P < 0.05) higher than that of low-molecular-weight (LMW) PAHs (2–4-ring PAHs) regardless of the type of biochar used. Additionally, all three types of biochar significantly increased the relative abundance of the dominant bacterial phyla and genera in soil. Redundancy and correlation analyses also showed that there was a strong correlation between the removal rate of PAHs and dominant bacteria in the rhizosphere soil. This study indicated that biochar effectively reduced the health risk from dietary exposure to PAHs in wheat grains by increasing the abundance of bacteria related to PAH degradation, promoting the biodegradation of PAHs in the rhizosphere soil, and consequently reducing PAH uptake by wheat.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
旷野发布了新的文献求助10
1秒前
2秒前
纯情的严青完成签到,获得积分10
4秒前
深情安青应助Captain采纳,获得30
4秒前
希望天下0贩的0应助竹子采纳,获得30
4秒前
5秒前
6秒前
顾矜应助糊涂的丹南采纳,获得10
7秒前
7秒前
DDD关注了科研通微信公众号
8秒前
YX发布了新的文献求助10
8秒前
8秒前
9秒前
幸运星发布了新的文献求助10
9秒前
天天快乐应助高高采纳,获得10
10秒前
aero完成签到 ,获得积分10
11秒前
11111完成签到,获得积分10
12秒前
Ori发布了新的文献求助10
12秒前
巴斯光年完成签到,获得积分10
12秒前
13秒前
陶醉灵槐发布了新的文献求助10
13秒前
yy76完成签到,获得积分10
14秒前
14秒前
珍珠奶茶发布了新的文献求助10
14秒前
情怀应助瀼瀼采纳,获得10
15秒前
16秒前
zihi发布了新的文献求助10
17秒前
chy完成签到 ,获得积分10
17秒前
18秒前
18秒前
boli发布了新的文献求助30
19秒前
珍珠奶茶完成签到,获得积分10
21秒前
hhuajw完成签到,获得积分10
22秒前
科研通AI5应助无奈秋荷采纳,获得10
24秒前
在水一方应助科研通管家采纳,获得10
24秒前
YINZHE应助科研通管家采纳,获得20
24秒前
wanci应助科研通管家采纳,获得10
24秒前
24秒前
科研通AI5应助科研通管家采纳,获得10
24秒前
taco完成签到,获得积分20
24秒前
高分求助中
Les Mantodea de Guyane Insecta, Polyneoptera 2500
Mobilization, center-periphery structures and nation-building 600
Introduction to Strong Mixing Conditions Volumes 1-3 500
Technologies supporting mass customization of apparel: A pilot project 450
China—Art—Modernity: A Critical Introduction to Chinese Visual Expression from the Beginning of the Twentieth Century to the Present Day 430
Multichannel rotary joints-How they work 400
Tip60 complex regulates eggshell formation and oviposition in the white-backed planthopper, providing effective targets for pest control 400
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 物理 生物化学 纳米技术 计算机科学 化学工程 内科学 复合材料 物理化学 电极 遗传学 量子力学 基因 冶金 催化作用
热门帖子
关注 科研通微信公众号,转发送积分 3794881
求助须知:如何正确求助?哪些是违规求助? 3339777
关于积分的说明 10297235
捐赠科研通 3056415
什么是DOI,文献DOI怎么找? 1676988
邀请新用户注册赠送积分活动 805034
科研通“疑难数据库(出版商)”最低求助积分说明 762286