数字农科院2.0

Valorizing Rice Straw And Its A.naerobically Digested Residues For B iochar To Remove Pb(Ii) From Aqueous Solution

文献类型： 外文期刊

作者： Li, JY; Shen, F; Yang, G; Zhang, YZ; Deng, SH; Zhang, J; Zeng, YM; Luo, T; Mei, ZL

作者机构：

期刊名称： INTERNATIONAL JOURNAL OF POLYMER SCIENCE

ISSN： 1687-9422

年卷期： 2018 年

页码：

收录情况： JCR（2021版）

摘要： To seek a new path to valorize rice straw (RS) and its anaerobically digested residues (DRS), biochar production at different temperatures for removing Pb(II) from aqueous solution and its basic physicochemical characteristics for elucidating potentially adsorption mechanisms were investigated. Overall, pH, electrical conductivity (EC), ash, specific surface area (SA), micronutrient content, and aromaticity of RS biochars (RSBCs) and DRS biochars (DRSBCs) increased with the promoted pyrolysis temperature, and opposite trends were found on the yield, volatilematter, H,N, and O. Lower pH and K content but higher yield, carbon stability, and N and P content were achieved by DRSBCs. Consequently, DRSBCs exhibited lower Pb(II) removal, which was 0.15-0.35 of RSBCs. Maximum adsorption capacities of 276.3 and 90.5 mg.g(-1) were achieved by RSBC and DRSBC, respectively, at 500 degrees C. However, distinct mechanisms dominated Pb(II) removal, in which carbonates and carboxylates were responsible for RSBCs, and phosphate silicate precipitation and complexation with carboxylate groups controlled DRSBCs.

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