Determining the content of toxic elements (Pb, Cd, and As) in herbal plants collected from different sites in northern Vietnam

Abstract


 
 
 Plants might contain heavy metals from the surrounding polluted environment. Medicinal herb and plants, commonly used in Vietnam, may pose a risk to public health when polluted with heavy metals such as Pb, Cd and As. This study aims to investigate the content of Pb, Cd, and As in five selected herb plants (Phyllanthus urinaria L., Plantago asiatica L., Eleusine indica L., Wedelia chinensis (Osbeck) Merr, and Artemisia vulgaris L.). The samples were collected from natural sites in some provinces in northern Vietnam. The concentrations of Pb, Cd, and As were determined by the Inductively coupled plasma mass spectrometry (ICP-MS) method. The content of Pb, Cd and As was 0.247 ÷ 32.080 mg kg-1, 0.000 ÷ 1.099 mg kg-1, 0.000 ÷ 2.261 mg kg-1, respectively. A total of 50 out of the 58 investigated samples had concentrations of Pb, Cd, As lower than the permissible values of the World Health Organization (WHO). The remaining samples had contents of Pb or Cd or As significantly higher than the permissible limit defined by WHO.
 Thực vật có thể bị ô nhiễm do hấp thụ kim loại nặng từ môi trường ô nhiễm xung quanh. Các loại cây thảo dược được sử dụng phổ biến làm thuốc chữa bệnh ở Việt Nam. Chúng có thể gây nguy hiểm cho sức khỏe cộng đồng khi bị ô nhiễm kim loại nặng (Pb, Cd...vv.). Nghiên cứu này nhằm điều tra hàm lượng Pb, Cd và As trong năm loại cây thảo dược (cây Diệp Hạ Châu, cây Mã Đề, cây Cỏ Mần Trầu, cây Sài Đất và cây Ngải Cứu). Các mẫu cây này được lấy từ các địa điểm mọc tự nhiên ở một số tỉnh khác nhau thuộc khu vực miền bắc Việt Nam. Hàm lượng của Pb, Cd, và As được xác định bằng phương pháp ICP-MS. Hàm lượng Pb, Cd và As trong các mẫu phân tích lần lượt nằm trong khoảng là 0.247 ÷ 32.080 mg. Kg-1, 0.000 ÷ 1.099 mg. Kg-1, 0.000 ÷ 2.261 mg. Kg-1. 50 trên 58 mẫu phân tích có hàm lượng Pb, Cd, As thấp hơn giới hạn cho phép do tổ chức y tế thế giới (WHO) quy định. Có 8 trên 58 mẫu cây phân tích có hàm lượng Pb hoặc, Cd hoặc As cao hơn tiêu chuẩn giới hạn của WHO.
 
 

Bioaccumulation and Translocation of 6:2 Fluorotelomer Sulfonate, GenX, and Perfluoroalkyl Acids by Urban Spontaneous Plants

“…These four plants are common urban weeds in China, and plants of the same families span a wide geographic range across global urban spaces. In addition, they possess significantly different morphological and physiological traits (Table S2 and Figure S2A–J) and have demonstrated superenrichment of heavy metals in previous studies. − The experiments were conducted in five replicates in a greenhouse (25 °C, 14 h light). Plants were collected from the campus of Chongqing University (Shapingba District, Chongqing, China), and no source of industrial pollution (e.g., factories) within 10 km was confirmed.…”

“…Furthermore, they have been shown to have promising applications in urban restoration practices. In fact, many of them can grow well under postmining site conditions, and they can serve as a good option in urban greening initiatives within polluted areas to develop species-rich plant communities and accumulate heavy metal pollutants. − …”

Health risk assessment of toxic metal(loids) (As, Cd, Pb, Cr, and Co) via consumption of medicinal herbs marketed in Malawi

“…A study conducted in India reported As concentrations ranging from 0.16 to 1.1 mg kg −1 in medicinal plants [31] . Similarly, in a study conducted by Vuong et al [32] , mean As concentrations of 0.343 mg kg −1 , 1.628 mg kg −1 , 0.182 mg kg −1 and 0.295 mg kg −1 in Artemisia vulgaris L., Plantago asiatica L., Eleusine indica (L.) and Phyllanthus urinaria L., respectively [26] , [27] , [28] , [29] , [32] .

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“…Another study in Nigeria reported a mean Cd concentration of 0.16 mg kg −1 in Moringa oleifera and 0.44 mg kg −1 in Azadirachta indica ) [46] , which are considerably higher compared to the findings in this study. In comparison to other medicinal herbs, a study conducted by Dghaim et al [47] reported mean Cd concentration ranging from 0.03 to 0.43 mg kg −1 (mean: 0.14 mg kg −1 ) in medicinal herbs commonly consumed in the United Arab Emirates while Sepehri et al [48] found Cd concentrations ranging from 0.012 mg kg −1 to 0.0793 mg kg − 1 in medicinal plants consumed in Iran indicating that Cd concentrations in Malawian medicinal herbs are significantly lower than those reported in medicinal plants from other regions [12] , [32] , [49] , [50] , [51] , [52] .…”

Determination of Fluoride Concentration in Rosemary (Rosmarinus officinalis) using Selectiv- electrod technique

“…Data analysis showed a significant differences between means at (P=.0001) using SPSS statistic version 25 software and One-way ANOVA test Consumption of spicy and medical plants are widely distributed. However, in addition to organic material, plants can also contain heavy metals from the surrounding polluted environment (Truong., 2020), and accumulate different element with concentration higher than its content in the environment and up to 20 000 times (Ref). Fluoride content in different sources was widely investigated using different detection methods.…”