制备工艺对nZVI/污泥基生物炭中Zn、Cu、Pb形态分布及其生态风险的影响

汤传武; 刘立恒; 黄蓉; 何东薇

doi:10.13205/j.hjgc.202010034

制备工艺对nZVI/污泥基生物炭中Zn、Cu、Pb形态分布及其生态风险的影响

doi: 10.13205/j.hjgc.202010034

汤传武^1,2,3,
刘立恒^1,2,3, ,,
黄蓉^1,2,3,
何东薇^1,2,3

1. 桂林理工大学环境科学与工程学院, 广西桂林 541004;
2. 桂林理工大学广西环境污染控制理论与技术重点实验室, 广西桂林 541004;
3. 桂林理工大学岩溶地区水污染控制与用水安全保障协同创新中心, 广西桂林 541004

基金项目:

国家自然科学基金重点项目（51638006）；桂林理工大学人才项目（002401003489）；广西高等学校高水平创新团队及卓越学者计划项目（002401013001）；广西矿冶与环境科学实验中心（KH2012ZD004）；广西"八桂学者"项目。

详细信息

作者简介:
汤传武(1992-),男,硕士研究生,主要研究方向为固体废弃物的处置及其资源化利用。813702685@qq.com

通讯作者:
刘立恒(1980-),男,博士,副研究员,主要研究方向为固体废弃物资源化利用和环境功能材料。deanhenry_liu01@126.com

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出版历程
- 收稿日期: 2019-02-27

EFFECT OF PREPARATION PROCESS ON SPECIATION DISTRIBUTION AND ECOLOGICAL RISK OF Zn, Cu AND Pb IN nZVI/SLUDGE BASED BIOCHARS

TANG Chuan-wu^1,2,3,
LIU Li-heng^{1,2,3
, ,},
HUANG Rong^1,2,3,
HE Dong-wei^1,2,3

1. College of Environmental Sciences and Engineering, Guilin University of Technology, Guilin 541004, China;
2. Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China;
3. Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China

摘要

摘要: 以市政污泥为原料、纳米零价铁（nZVI）为添加剂，采用热解法制备污泥生物炭，考察了nZVI添加量、热解温度和升温速率对生物炭中Zn、Cu、Pb形态分布及其生态风险的影响。结果显示：高nZVI添加量、高热解温度及低升温速率可提高稳定态（BCR法） Zn、Cu和Pb的含量；高nZVI添加量可促使Zn、Cu和Pb向可氧化态转化，而高热解温度和低升温速率有利于残渣态Zn、Cu和Pb的生成；最优nZVI添加量、热解温度和升温速率分别为2000 mg/kg，800℃和4℃/min。此外，当nZVI添加量为800 mg/kg、热解温度为800℃和升温速率为2℃/min时有利于降低Zn、Cu和Pb的生态风险；Zn、Cu和Pb总体生态风险等级分别为低风险、低风险和无风险，与Cu和Pb相比，Zn的生态风险较高；以RI值为评价指标，nZVI/污泥基生物炭的优化制备工艺为：nZVI添加量为200 mg/kg，热解温度为800℃，升温速率为5℃/min。
- nZVI/污泥基生物炭 /
- 制备工艺 /
- 重金属 /
- 形态分布 /
- 生态风险
Abstract: The biochars were prepared by pyrolysis using municipal sludge as the raw material and nano-zero-valent iron (nZVI) as the additive. The effect of nZVI addition, pyrolysis temperature and heating rate on speciation distribution and ecological risk of Zn, Cu and Pb in biochars was investigated. The results showed that the higher nZVI addition, higher pyrolysis temperature and lower heating rate could increase the contents of Zn, Cu and Pb in the steady state (BCR method). The higher nZVI addition could promote the conversion of Zn, Cu and Pb to the oxidizable state, while the higher pyrolysis temperature and lower heating rate were favorable for the formation of residual Zn, Cu and Pb. The optimized nZVI addition, pyrolysis temperature and heating rate were 2000 mg/kg, 800 ℃ and 4 ℃/min, respectively. In addition, when the addition amount of nZVI was 800 mg/kg, the pyrolysis temperature was 800 ℃ and the heating rate was 2 ℃/min, which was conducive to reduce the ecological risk of Zn, Cu and Pb. The approximate ecological risk levels of Zn, Cu and Pb were low risk, low risk and no risk, respectively. Compared with Cu and Pb, the ecological risk of Zn was higher. If the RI value was used as the evaluation index, the optimized preparation process of nZVI/sludge-based biochar was as follow: nZVI dosage of 200 mg/kg, pyrolysis temperature of 800 ℃, heating rate of 5 ℃/min.
- nZVI/sludge based biochars /
- preparation technology /
- heavy metal /
- morphology distribution /
- ecological risk

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参考文献(35)

中国环境保护部. 中国环境统计年鉴[M]. 北京:中国统计出版社,2017.

FENG L Y, LUO J Y, CHEN Y G. Dilemma of sewage sludge treatment and disposal in China[J]. Environmental Science & Technology, 2015,49(8):4781-4782.

范世锁,汤婕,程燕,等. 污泥基生物炭中重金属的形态分布及潜在生态风险研究[J]. 生态环境学报,2015,24(10):1739-1744.

BALWANT S, BHUPINDERPAL S, ANNETTEL C. Characterisation and evaluation of biochars for their application as a soil amendment[J]. Australian Journal of Soil Research, 2010, 48(7):516-525.

DE ANDRÉS J M, ORJALES L, NARROS A, et al. Carbon dioxide adsorption in chemically activated carbon from sewage sludge[J]. Journal of the Air & Waste Management Association, 2013, 63(5):557-564.

MUHAMMAD R, SHAFAQAT A, MUHAMMAD M F, et al. Mechanisms of biochar-mediated alleviation of toxicity of trace elements in plants:a critical review[J]. Environmental Science & Pollution Research, 2016. 23(3):2230-2248.

王格格,李刚,陆江银,等. 热解工艺对污泥制备生物炭物理结构的影响[J]. 环境工程学报,2016,10(12):7289-7293.

陈坦,韩融,王洪涛,等. 污泥基生物炭对重金属的吸附作用[J]. 清华大学学报(自然科学版),2014,54(8):1062-1067.

陈坦,周泽宇,孟瑞红,等. 改性污泥基生物炭的性质与重金属吸附效果[J]. 环境科学,2019,40(4):1842-1848.

王君,陈娴,桂丕,等.污泥炭化温度和时间对重金属形态及作物累积的影响[J]. 华南农业大学学报,2015,36(5):54-60.

金俊伟. 热解及添加生物质辅料对污泥中重金属的固定效应及生态风险评价[D]. 杭州:浙江农林大学,2016.

潘亭亭,张双全,张秋荣,等. 城市污泥与玉米秸秆共热解重金属的形态变化[J]. 中国矿业大学学报,2011,40(3):487-491.

卢欢亮,叶向东,汪永红,等. 热解温度对污泥生物炭的表面特性及重金属安全性的影响[J]. 环境工程学报,2015,9(3):1433-1439.

王志朴,朱赫男,邢文龙,等. 污泥与秸秆共热解制备生物炭工艺优化及其对Cr(Ⅵ)的吸附[J]. 环境工程,2019,37(2):138-143.

赵晶晶,周少奇,陈安安,等. 城市污泥与花生壳制活性炭的重金属形态分析及生态风险评价[J]. 农业环境科学学报,2012,31(11):2284-2289.

刘立恒,林华,李海翔,等.污泥活性炭的制备、表征及应用[M].北京:中国环境出版社,2017.

LI Z, DENG H, YANG L, et al. Influence of potassium hydroxide activation on characteristics and environmental risk of heavy metals in chars derived from municipal sewage sludge[J]. Bioresource Technology, 2018, 256:216-223.

CHEN T, YAN B. Fixation and partitioning of heavy metals in slag after incineration of sewage sludge[J]. Waste Management, 2012, 32(5):957-964.

EDGELL K.US EPA Method Study 37-SW-846 Method 3050 Acid Digestion of Sediments Sludges and Soils[M]. Washington DC:US Environment Protection Agency, Environmental Monitoring Systems Laboratory, 1989.

HU Y, CHEN G, MA W, et al. Distribution and contamination hazards of heavy metals in solid residues from the pyrolysis and gasification of wastewater sewage sludge[J].Journal of Residuals Science & Technology, 2016, 13(4):259-268.

YUAN H R, LU T, ZHAO D D, et al. Influence of temperature on product distribution and biochar properties by municipal sludge pyrolysis[J]. Journal of Material Cycles and Waste Management, 2013, 15(3):357-361.

周杨. 不同催化剂对微波热解污泥产物分布规律的影响研究[D]. 深圳:深圳大学,2016.

蔡攀,蒋绍坚,付国富,等. 重金属在油菜秆热解过程中的迁移规律[J].中南大学学报(自然科学版),2018,49(7):1808-1814.

CHEN F F, HU Y Y, DOU X M, et al. Chemical forms of heavy metals in pyrolytic char of heavy metal-implanted sewage sludge and their impacts on leaching behaviors[J]. Journal of Analytical and Applied Pyrolysis, 2015, 116:152-160.

HU Y Y, YANG F, CHEN F F, et al. Pyrolysis of the mixture of MSWI fly ash and sewage sludge for co-disposal:effect of ferrous/ferric sulfate additives[J]. Waste Management, 2018, 75:340-351.

XIONG Q, ZHOU M, LIU M J, et al. The transformation behaviors of heavy metals and dewaterability of sewage sludge during the dual conditioning with Fe²⁺-sodium persulfate oxidation and rice husk[J]. Chemosphere, 2018, 208:93-100.

HE Y D, ZHAI Y B, LI C T, et al. The fate of Cu, Zn, Pb and Cd during the pyrolysis of sewage sludge at different temperatures[J]. Environmental Technology, 2010, 31(5):567-574.

HAN H D, HU S, SYED-HASSAN S S A, et al. Effects of reaction conditions on the emission behaviors of arsenic, cadmium and lead during sewage sludge pyrolysis[J]. Bioresource Technology, 2017, 236:138-145.

LU T, YUAN H R, WANG Y Z, et al. Characteristic of heavy metals in biochar derived from sewage sludge[J]. Journal of Material Cycles and Waste Management, 2016, 18(4):725-733.

李刚,王格格,王忠科,等. 脱水污泥低温热解制备生物炭的研究[J]. 可再生能源,2016,34(10):1533-1539.

LI H M, QIAN X, HU W, et al. Chemical speciation and human health risk of trace metals in urban street dusts from a metropolitan city, Nanjing, SE China[J]. Science of The Total Environment, 2013, 456-457(7):212-221.

张进,刁韩杰,王敏艳,等.稻壳与污泥共热解对污泥炭特性及其重金属生态风险的影响[J].环境科学学报,2019,39(4):1250-1256.

BING H J, ZHOU J, WU Y H, et al.Current state, sources, and potential risk of heavy metals in sediments of Three Gorges Reservoir, China[J]. Environmental Pollution, 2016, 214:485-496.

杨刚. 高灰基生物炭农用对镉污染的控制机制及生态风险评价[D]. 南京:南京大学,2018.

LIU X X, WANG Y W, GUI C M, et al. Chemical forms and risk assessment of heavy metals in sludge-biochar produced by microwaveinduced low temperature pyrolysis[J]. RSC Advances, 2016, 6:101960-101967.

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