Effects of Biochar-Derived Sewage Sludge on Heavy Metal Adsorption and Immobilization in Soils.
Effects of Biochar-Derived Sewage Sludge on Heavy Metal Adsorption and Immobilization in Soils.
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生物炭污泥对土壤重金属吸附和固定化的影响
DOI：
10.3390/ijerph14070681
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发表时间：
2017-06-23
影响因子：
--
通讯作者：
Luo X
中科院分区：
文献类型：
--
作者：
Zhou D;Liu D;Gao F;Li M;Luo X
研究了污泥生物炭对Cr、Mn、Cu、Zn的吸附和迁移特性的影响。通过在400 °C下热解城市污水污泥来生产生物炭（BC 400）。单金属溶液中Zn、Cr、Mn和Cu的最大吸附容量（qm）分别为5.905、5.724、5.681和5.342 mg·g-1，多金属溶液中分别为2.475、8.204、1.01和5.415 mg·g-1。在多金属溶液中，由于竞争吸附，对Mn、Cu和Zn的吸附量降低，而对Cr的吸附量增加。表面沉淀是这些金属在BC 400上吸附的重要机制。360 d培养试验结果表明，施用BC 400后，污染土壤中Cr、Mn、Cu和Zn的酸溶态含量分别降低了72.20%、70.38%、50.43%和29.78%。模拟酸雨淋溶试验表明，BC 400的加入增强了污染土壤的酸缓冲能力，淋溶液中Cr、Mn、Cu、Zn的含量均低于未处理土壤。总体而言，污泥生物炭的施用降低了重金属在复合污染土壤中的迁移性，该吸附实验适用于评价生物炭的修复性能。
The object of this study was to evaluate the effect of sewage sludge biochar on adsorption and mobility of Cr, Mn, Cu, and Zn. Biochar (BC400) was produced via pyrolysis of municipal sewage sludge at 400 °C. Maximum adsorption capacities (qm) for Zn, Cr, Mn, and Cu were 5.905, 5.724, 5.681, and 5.342 mg·g−1, respectively, in the mono-metal solution and 2.475, 8.204, 1.01, and 5.415 mg·g−1, respectively, in the multi-metal solution. The adsorption capacities for Mn, Cu, and Zn decreased in the multi-metal solution due to competitive adsorption, whereas the capacity for Cr increased. Surface precipitation is an important mechanism in the sorption of these metals on BC400. The 360-day incubation experiment showed that BC400 application reduced metal mobility in contaminated soils, which was attributed to the substantial decreases in the acid-soluble fractions of Cr, Mn, Cu, and Zn (72.20%, 70.38%, 50.43%, and 29.78%, respectively). Furthermore, the leaching experiment using simulated acid rain indicated that the addition of BC400 enhanced the acid buffer capacity of contaminated soil, and the concentration of Cr, Mn, Cu, and Zn in the leachate was lower than in untreated soil. Overall, this study indicates that sewage sludge biochar application reduces the mobility of heavy metal in co-contaminated soil, and this adsorption experiment is suitable for the evaluation of biochar properties for remediation.
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影响因子：
3
作者：
Fristak, Vladimir;Pipiska, Martin;Packova, Alena
通讯作者：
Packova, Alena
稻草热解炭多孔结构发展的评价：热解温度和加热速率的影响
影响因子：
6
作者：
Fu, Peng;Hu, Song;Wang, Jing
通讯作者：
Wang, Jing
影响因子：
11.4
作者：
Kim, Woong-Ki;Shim, Taeyong;Jung, Jinho
通讯作者：
Jung, Jinho
影响因子：
6
作者：
Fan, Shisuo;Tang, Jie;Li, Xuede
通讯作者：
Li, Xuede
影响因子：
13.6
作者：
Jiang, Jun;Xu, Ren-kou;Li, Zhuo
通讯作者：
Li, Zhuo