氧化钙对污泥炭重金属稳定性及其吸附性能的影响

doi:10.19964/j.issn.1006-4990.2022-0453

Abstract

Abstract:

In view of the catalytic effect of CaO on gas production and tar reforming during biomass pyrolysis process，which can significantly improve the adsorption performance of biochar，the modified sludge derived biochar（BC-Ca） was prepared by co-pyrolysis of CaO and sewage sludge at a mass ratio of 1∶10.The effect of CaO on the characteristics of the sludge-derived biochar，as well as the speciation distribution of heavy metals（Pb，Zn，Cu，Cr，Mn） were investigated.The ecological risk of the biochar was assessed based on the risk assessment code（RAC）.The adsorption properties of the modified sludge derived biochar on Cr（Ⅵ） was evaluated by the static adsorption experiments.The results showed that compared with unmodified biochar（BC），the fraction of residual state（F4） of Zn，Pb，Cr，Mn，and Cu in BC-Ca were increased by 11.76%，13.03%，26.96%，5.55%，and 2.11%，respectively，which were all in a low risk condition according to the RAC standard.Compared with BC，the specific surface area of BC-Ca was increased by 122.99%，indicating that the microstructure performance of BC-Ca was improved.The adsorption behavior of BC-Ca for Cr（Ⅵ） was described by the Langmuir model and pseudo-second order dynamic sorption model，indicating that the adsorption capacity of BC-Ca was increased with increasing temperature，and the adsorption rate was mainly controlled by chemical adsorption mechanism.The maximum adsorption capacity of BC-Ca for Cr（Ⅵ） was improved by 51.13% than that of BC，showing outstanding removal effect on Cr（Ⅵ）.

Key words: sludge-derived biochar, heavy metal stability, ecological risk, Cr（Ⅵ） adsorption

CLC Number:

TQ132.32

TIAN Yuling, CHENG Yang, HAN Rong, ZHOU Mei, WANG Chengjie, GE Qiangru. Effect of CaO on heavy metals stability and adsorption properties of sludge-derived biochar[J]. Inorganic Chemicals Industry, 2023, 55(6): 124-129.

Figures/Tables 9

Table 1

Fig.1

Table 2

Fig.2

Fig.3

Table 3

Table 4

Table 5

Fig.4

References 21

1	QIAN Lili， WANG Shuzhong， XU Donghai，et al.Treatment of municipal sewage sludge in supercritical water：A review［J］.Water Research，2016，89：118-131.
2	LEDAKOWICZ S， STOLAREK P， MALINOWSKI A，et al.Thermochemical treatment of sewage sludge by integration of drying and pyrolysis/autogasification［J］.Renewable and Sustainable Energy Reviews，2019，104：319-327.
3	CHEN Dezhen， YIN Lijie， WANG Huan，et al.Reprint of：Pyrolysis technologies for municipal solid waste：A review［J］.Waste Management，2015，37：116-136.
4	AGARWAL M， TARDIO J， VENKATA MOHAN S.Pyrolysis of activated sludge：Energy analysis and its technical feasibility［J］.Bioresource Technology，2015，178：70-75.
5	李复生，高慧，耿中峰，等.污泥热化学处理研究进展［J］.安全与环境学报，2015，15（2）：239-245.
	LI Fusheng， GAO Hui， GENG Zhongfeng，et al.Progress in research of thermochemical treatment of sewage sludge［J］.Journal of Safety and Environment，2015，15（2）：239-245.
6	梁宁，莫福金，周街荣，等.污泥生物炭制备及其对磷的吸附性能研究［J］.无机盐工业，2021，53（6）：174-179.
	LIANG Ning， MO Fujin， ZHOU Jierong，et al.Study on preparation of sludge biochar and its adsorption performance for phosphorus［J］.Inorganic Chemicals Industry，2021，53（6）：174-179.
7	DONG Jun， NZIHOU A， CHI Yong，et al.Hydrogen-rich gas production from steam gasification of bio-char in the presence of CaO［J］.Waste and Biomass Valorization，2017，8（8）：2735-2746.
8	CHEN Tan， ZHANG Yaxin， WANG Hongtao，et al.Influence of pyrolysis temperature on characteristics and heavy metal adsorptive performance of biochar derived from municipal sewage sludge［J］.Bioresource Technology，2014，164：47-54.
9	OGINNI O， YAKABOYLU G A， SINGH K，et al.Phosphorus adsorption behaviors of MgO modified biochars derived from waste woody biomass resources［J］.Journal of Environmental Chemical Engineering，2020，8（2）：103723.
10	JIN Junwei， WANG Minyan， CAO Yucheng，et al.Cumulative effects of bamboo sawdust addition on pyrolysis of sewage sludge：Biochar properties and environmental risk from metals［J］.Bioresource Technology，2017，228：218-226.
11	MARTINS B L， CRUZ C C V， LUNA A S，et al.Sorption and desorption of Pb²⁺ ions by dead Sargassum sp.biomass［J］.Biochemical Engineering Journal，2006，27（3）：310-314.
12	RAURET G， LÓPEZ-SÁNCHEZ J F， SAHUQUILLO A，et al.Improvement of the BCR three step sequential extraction procedure prior to the certification of new sediment and soil reference ma-terials［J］.Journal of Environmental Monitoring，1999，1（1）：57-61.
13	LIU Yucheng， LIU Qian， CHEN Mingyan，et al.Evaluation of migration of heavy metals and performance of product during co-pyrolysis process of municipal sewage sludge and walnut shell［J］.Environmental Science and Pollution Research，2017，24（27）：22082-22090.
14	PEZOTI O Jr， CAZETTA A L， GOMES R C，et al.Synthesis of ZnCl₂-activated carbon from macadamia nut endocarp（Macadamia integrifolia） by microwave-assisted pyrolysis：Optimization using RSM and methylene blue adsorption［J］.Journal of Analytical and Applied Pyrolysis，2014，105：166-176.
15	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.
	CHEN Tan， ZHOU Zeyu， MENG Ruihong，et al.Characteristics and heavy metal adsorption performance of sewage sludge-derived biochar from Co-pyrolysis with transition metals［J］.Environmental Science，2019，40（4）：1842-1848.
16	SCOTT S A， DAVIDSON J F， DENNIS J S，et al.The rate of gasification by CO₂ of chars from waste［J］.Proceedings of the Combustion Institute，2005，30（2）：2151-2159.
17	KHADHAR S， SDIRI A， CHEKIRBEN A，et al.Integration of sequential extraction，chemical analysis and statistical tools for the availability risk assessment of heavy metals in sludge amended soils［J］.Environmental Pollution，2020，263：114543.
18	徐楠楠，林大松，徐应明，等.玉米秸秆生物炭对Cd²⁺的吸附特性及影响因素［J］.农业环境科学学报，2014，33（5）：958-964.
	XU Nannan， LIN Dasong， XU Yingming，et al.Adsorption of aquatic Cd²⁺ by biochar obtained from corn stover［J］.Journal of Agro-Environment Science，2014，33（5）：958-964.
19	LI Jie， PAN Lanjia， YU Guangwei，et al.Synthesis of an easily recyclable and safe adsorbent from sludge pyrochar for ciprofloxacin adsorption［J］.Environmental Research，2021，192：110258.
20	KHAN Z H， GAO Minling， QIU Weiwen，et al.Mechanisms for cadmium adsorption by magnetic biochar composites in an aqueous solution［J］.Chemosphere，2020，246：125701.
21	CHEN Na， CAO Shiyu， ZHANG Lin，et al.Structural dependent Cr（Ⅵ） adsorption and reduction of biochar：Hydrochar versus pyrochar［J］.Science of the Total Environment，2021，783：147084.

样品	Zn	Pb	Cr	Mn	Cu
BC	16.45%/MR	4.87%/LR	5.33%/LR	16.19%/MR	2.17%/LR
BC-Ca	7.01%/LR	2.90%/LR	8.36%/LR	15.41%MR	1.85%/LR

温度/ ℃	Langmuir方程				Fredundlich方程
温度/ ℃	Q_e/ （mg·g^-1）		K_L/ （L·g^-1）	R²	K_F	n	R²
15	24.59	0.740		0.942	11.873	4.403	0.894
25	24.71	0.855		0.972	12.366	4.546	0.912
35	24.84	1.107		0.974	13.056	4.780	0.932

拟一级反应				拟二级反应
Q_m/（mg·g^-1）	k₁/min^-1	R²		Q_m/（mg·g^-1）	k₂/（mg·min）^-1	R²
16.637	0.140	0.922		17.891	0.010	0.984

[1]	CHEN Feng, FENG Kang, LI Ming, SHEN Haojie, TIAN Chengtao, TANG Yuan, LI Zhili, HE Dongsheng. Application of organically modified calcium sulfate whiskers in asphalt modification [J]. Inorganic Chemicals Industry, 2024, 56(3): 125-130.
[2]	XIONG Shuang, YAN Jinsheng, ZHOU Zhou, ZHOU Baodi, CHEN Xiaopeng, TONG Zhangfa. Effect of reaction conditions of quicklime digestion on properties of calcium hydroxide [J]. Inorganic Chemicals Industry, 2023, 55(12): 50-58.
[3]	GUO Ze, ZHANG Pengfei, YANG Fan, ZHANG Hanquan, LU Manman. Preparation of β-hemihydrate gypsum by phosphogypsum roasting [J]. Inorganic Chemicals Industry, 2023, 55(10): 106-113.
[4]	DU Guanggang, HE Tong, XU Zehui, LIU Lei. Study on properties of calcium oxide in SCA under different calcination conditions [J]. Inorganic Chemicals Industry, 2023, 55(10): 35-41.
[5]	LIU Yue, ZHENG Qiang, XING Jiabin, XING Run, MA Yali, JIA Songyan, LI Xue. Study on process and application of high-performance calcium hydroxide prepared by dry digestion from limestone [J]. Inorganic Chemicals Industry, 2023, 55(10): 42-49.
[6]	CHEN Xiaoqing, ZHOU Jian′an, WANG Yi, HAN Juan, WANG Bao, PEI Peiyan. Study on decomposition characteristic of limestone powder in high temperature flue gas of converter [J]. Inorganic Chemicals Industry, 2023, 55(10): 70-77.
[7]	CHEN Qi, LIAO Dankui, ZHANG Qingnian, YAN Jinsheng, HUANG Yu, CHEN Xiaopeng, TONG Zhangfa. Fast and efficient determination of quicklime activity by conductivity method [J]. Inorganic Chemicals Industry, 2023, 55(9): 114-120.
[8]	ZHANG Jinjun, GUO Linlin, LIU Bojing, FENG Shuang, SHI Qi. Study on preparation of needle-like shaped CaCO₃ from calcium carbide slag [J]. Inorganic Chemicals Industry, 2023, 55(7): 103-108.
[9]	HE Yanfang, ZHAO Lüxuan, FENG Yuan, WU Kaiqing, LIU Bingyan, HUANG Junkai. Countermeasures and suggestions for high-quality development of calcium carbonate industry and ecological environment protection in Guangxi [J]. Inorganic Chemicals Industry, 2023, 55(7): 25-31.
[10]	QU Xiaoyuan, ZHENG Qiang, FAN Yuanyang, LIU Haili, DENG Xiaoyang, LI Xue. Study on preparation of large cube calcium carbonate by secondary carbonization of dolomite [J]. Inorganic Chemicals Industry, 2023, 55(7): 58-64.
[11]	FAN Fangfang, TONG Zhongkai, ZUO Weiyuan. Study on adsorption of tetracycline from wastewater by calcium modified peanut shell biochar [J]. Inorganic Chemicals Industry, 2023, 55(6): 109-115.
[12]	MA Xue, ZHOU Yuan, HUANG Chao, ZHU Xiaping. Study on preparation process of high purity calcium citrate from Zigong underground yellow brine [J]. Inorganic Chemicals Industry, 2023, 55(4): 60-64.
[13]	QI Yuanhao,WU Jinxiu,LIU Zhaogang,HU Yanhong,FENG Fushan,LI Jianfei,WANG Xin,LIU Conglin. Preparation and characterization of anhydrous calcium sulfate whisker [J]. Inorganic Chemicals Industry, 2022, 54(10): 109-115.
[14]	LIU Yaxiong. Preparation and application of submicron cubic calcium carbonate [J]. Inorganic Chemicals Industry, 2022, 54(7): 98-104.
[15]	LIANG Chao,LI Chunquan,SUN Zhiming,ZHENG Shuilin. Surface modification effect and mechanism of new organic modifiers on ground calcium carbonate [J]. Inorganic Chemicals Industry, 2022, 54(7): 70-77.

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Effect of CaO on heavy metals stability and adsorption properties of sludge-derived biochar

RichHTML

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 9

References 21

Related Articles 15

Metrics

Comments

Recommended 0