| 生物质炭对土壤吸附Zn2+-DEP复合污染溶液中Zn2+的影响 |
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| 引用本文： | 钱钱,杨兴,郭明,秦鹏,徐颂,王海龙. 生物质炭对土壤吸附Zn2+-DEP复合污染溶液中Zn2+的影响[J]. 浙江农林大学学报, 2019, 36(6): 1051-1061. DOI: 10.11833/j.issn.2095-0756.2019.06.001 |
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| 作者姓名： | 钱钱 杨兴 郭明 秦鹏 徐颂 王海龙 |
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| 作者单位： | 1.浙江农林大学 环境与资源学院, 浙江 杭州 3113002.浙江农林大学 浙江省土壤污染生物修复重点实验室, 浙江 杭州 3113003.广东省生物炭工程技术研究中心, 广东 佛山 5280004.浙江农林大学 理学院, 浙江 杭州 311300 |
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| 基金项目： | 国家自然科学基金面上项目21577131国家自然科学基金面上项目21876027广东省自然科学基金重点项目2017A030311019浙江省自然科学基金重点项目LZ15D010001 |
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| 摘 要： | 为研究施用生物质炭后土壤对重金属-邻苯二甲酸酯（PAEs）复合污染物的吸附效果，选取猪炭和法国梧桐Platanus orientalis炭，采用批量吸附试验，并初步探究其动力学和热力学吸附机理。结果表明:猪炭（PB）和法国梧桐炭（POB）均可促进土壤对重金属-PAEs复合污染溶液中锌离子（Zn2+）的吸附，且随生物质炭施加量的增加更加明显，其中相较不加生物质炭的处理，施加质量分数为2% PB可使饱和吸附量提高31.61%，是施加质量分数为2% POB的5.90倍。动力学吸附行为可采用准二级动力模型较好描述，主要吸附过程包括液膜扩散和颗粒内扩散。热力学吸附过程为自发的吸热反应，并以氢键作用力为主。此外，DEP为典型的PAEs，其添加可促进土壤对溶液中Zn2+的吸附。
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| 关 键 词： | 土壤学 生物质炭 吸附机理 重金属-PAEs 动力学 热力学 |
| 收稿时间： | 2018-12-24 |
Adsorption of Zn2+ from a Zn2+-DEP (diethyl phthalate)composite solution using biochars in soil |
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| QIAN Qian,YANG Xing,GUO Ming,QIN Peng,XU Song,WANG Hailong. Adsorption of Zn2+ from a Zn2+-DEP (diethyl phthalate)composite solution using biochars in soil[J]. Journal of Zhejiang A&F University, 2019, 36(6): 1051-1061. DOI: 10.11833/j.issn.2095-0756.2019.06.001 |
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| Authors: | QIAN Qian YANG Xing GUO Ming QIN Peng XU Song WANG Hailong |
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| Affiliation: | 1.College of Environmental and Resource Sciences, Zhejiang A & F University, Hangzhou 311300, Zhejiang, China2.Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang A & F University, Hangzhou 311300, Zhejiang, China3.Biochar Engineering Technology Research Center of Guangdong Province, Foshan 528000, Guangdong, China4.School of Science, Zhejiang A & F University, Hangzhou 311300, Zhejiang, China |
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| Abstract: | To determine the effect of biochar application on adsorption capacity of contaminants from soils, biochars derived from dead pigs (PB) and Platanus orientalis branches (POB) were selected. A batch equilibration method was used to explore the underlying mechanisms of kinetic and thermodynamic adsorption. Treatments included an untreated control, 2% PB-treated soil, and 2% POB-treated soil, and were replicated three times. Results indicated that both PB and POB enhanced adsorption capacity of Zn2+ from a Zn2+-DEP(diethyl phthalate) composite solution(P < 0.05), and the capacity increased with an increase of biochar application rates(P < 0.05). Compared with the untreated control, saturated adsorption increased 31.61% in the 2% PB-treated soil, which was 5.90 times that of the 2% POB-treated soil. Additionally, adsorption kinetics could be well described by a pseudo-second order kinetics model with adsorption processes mainly including liquid film and intraparticle diffusion. The thermodynamic adsorption process was a spontaneous endothermic reaction primarily controlled by a hydrogen bonding force. In addition, the application of DEP obviously promoted the adsorption of Zn2+ onto the soils(P < 0.05). This study could provide a scientific reference for the application of biochars in the remediation of soils contaminated with both heavy metals and phthalate esters (PAEs). |
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