评价天然沸石对玉米中有毒重金属的固定化及其转移的影响。

IF 1.3 4区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY

Bulletin of the Chemical Society of Ethiopia Pub Date : 2023-09-19 DOI:10.4314/bcse.v37i6.5

Wubishet Legese, Abi M. Taddesse, Kibebew Kibret, Lemma Wogi

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引用次数: 0

摘要

摘要研究了表面活性剂改性(SMNZ)和未改性天然沸石(UNZ)对土壤系统中Cr3+、Pb2+和Cd2+的固定化效果。Phillipsite被确定为宿主沸石的主要成分。混合20% UNZ的土壤在土壤-沸石柱的顶层保留了最高的所有金属含量。在30 mg /kg土壤中观察到金属向玉米作物的转移最低。pH、用量、搅拌速度、接触时间、初始金属离子浓度等实验条件对改性沸石(phillipsite)和未改性沸石(phillipsite)对Cr3+、Pb2+和Cd2+的吸附均有显著影响。对照土壤、SMNZ和UNZ混合土壤对Cr3+的最大吸附量(mg/kg)分别为67.1、90.9、151.5、84.8、120.5、238.1、83.3、116.3和212.8。因此，利用天然沸石，特别是UNZ，对控制土壤系统中Cr3+、Pb2+和Cd2+金属离子的迁移，从而向植物系统转移具有重要作用。关键词:沸石;固定化;重金属;公牛。化学。Soc。中国生物医学工程学报，2016,37(6):1351-1368。DOI: https://dx.doi.org/10.4314/bcse.v37i6.5

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Assessing the influence of natural zeolite on toxic heavy metals immobilization and their transfer into Zea mays L.

ABSTRACT. This research presents the efficiency of surfactant-modified (SMNZ) and unmodified natural-zeolite (UNZ) in the immobilization of Cr3+, Pb2+, and Cd2+ in the soil system. Phillipsite is identified as a major component of the host zeolite. Soil mixed with 20% UNZ retained the highest amount of all metals on the top layer of the soil-zeolite column. The lowest transfer of metals into the maize crop was observed at 30 mg of UNZ/kg soil. The experimental conditions such as pH, dose, stirring speed, contact time, and initial metal ions concentration showed significant effect on adsorption of Cr3+, Pb2+, and Cd2+ onto both unmodified and modified zeolite (phillipsite). The maximum adsorption (mg/kg) onto control soil, soil mixed with SMNZ and UNZ was 67.1, 90.9, 151.5 for Cr3+, 84.8, 120.5, 238.1 for Pb2+, 83.3, 116.3 and 212.8 for Cd2+ respectively. Thus, the use of natural zeolite, particularly UNZ has an important role in controlling the mobility of Cr3+, Pb2+, and Cd2+ metal ions in the soil system and thus their transfer to plant system. KEY WORDS: Zeolite, Immobilization, Heavy metals, Column, Pot trial, Batch Bull. Chem. Soc. Ethiop. 2023, 37(6), 1351-1368. DOI: https://dx.doi.org/10.4314/bcse.v37i6.5

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来源期刊

Bulletin of the Chemical Society of Ethiopia 化学-化学综合

CiteScore

2.20

自引率

8.30%

发文量

113

审稿时长

6-12 weeks

期刊介绍： The Bulletin of the Chemical Society of Ethiopia (BCSE) is a triannual publication of the Chemical Society of Ethiopia. The BCSE is an open access and peer reviewed journal. The BCSE invites contributions in any field of basic and applied chemistry.