Predicting non-carcinogenic hazard quotients of heavy metals in pepper (Capsicum annum L.) utilizing electromagnetic waves  

作　　者：Marzieh Mokarram Hamid Reza Pourghasemi Huichun Zhang 

机构地区：[1]Depatment of Range and Watcrshed Managemcent Cllge of Ariculut and Naturel Resures of Darab,Shiraz Univrsity,Shiraz 71946-84471,Iran [2]Depatment of Natural Resources and Enionmental Enginerng Cllge of Agicuture,Shiraz University,Shirz 7141-6586 Iran [3]Depatment of Civil and Environmental Engiccrin Case Westem Reseve Univrsit,Cleveland,0H 44106,USA

出　　处：《Frontiers of Environmental Science & Engineering》2020年第6期237-249,共13页环境科学与工程前沿（英文）

基　　金：The authors would like to acknowledge the Shiraz University for funding this research(238726-141).

摘　　要：Given the tendency of heavy metals to accumulate in soil and plants,the purpose of this study was to determine the contamination.levels of Cd,Ni,Pb,and Zn on peppers(leaves.and fruit),grown in contaminated soils in industral centers.For this purpose,we measured the uptake of the four heavy metals by peppers grown in the heavy metal contaminated soils throughout the four growth stages:two-leaf,growth,fiowering,and fruiting;and calculated various vegetation indices to evaluate the heavy metal contamination potentials.Electromagnetic waves were also applied for analyzing the responses of the target plants to various heavy metals.Based on the relevant spectral bands identified by principal component analysis(PCA)and random search methods,a regression method was then employed.to determine the most optimal.spectral bands for estimating,the target hazard quotient(THQ).The THQ was found to be the highest in the plants contaminated by Pb(THQ=62)and Zn(THQ=5.07).The results of PCA and random search indicated that the spectra at the bands of b570,b650,and b760 for Pb,b400 and b880 for Ni,b560 and b880 for Cd,and b560 b910,and b1050 for Zn were the most optimal spectra for assessing THQ.Therefore,in future studies,instead of examining the amount of heavy metals in plants by chemical analysis in the laboratory,the responses of the plants to the electromagnetic waves in the identified bands can be redily investigated in the field based on the established correlations.

关 键 词：Heavy metals PLANTS Target Hazard Quotient(THQ) Principal Component Analysis(PCA) Random search Electromagnetic wave 

分 类 号：TG14[一般工业技术—材料科学与工程]