Cách mạng công nghiệp lần thứ tư và những vấn đề pháp lý đặt ra : Sách chuyên khảo

318 tr. ; 21 cm

Heavy Metals Accumulation of Food-crops Grown in Agricultural Areas Affected by Industrial Wastewater, Da Nang, Vietnam

Heavy metal pollution of agricultural soils resulting from wastewater irrigation has been causing major concern due to the potential risk involved. In the present study,food-crops (Chrysanthemum coronarium; Ocimumbasilicum; Coriandrumsativum), irrigation water, and corresponding agricultural soil were assessed for Pb and As contamination. Study results reveal that contents of Pb and As in agricultural soils are lower than their permissible values in comparison with Vietnam technical regulations on the allowable limits of heavy metals for agricultural soils. By contrast, the concentration of Pb and As in water samples are higher than its allowable level for irrigation water. Besides, most of As values in food-crops grown surrounding Hoa Khanh IZ are lower than its permissible level in vegetables. Meanwhile, a vast fraction of Pb contents in food-crops have exceeded its allowable level for both leafy and spice vegetables. The associated risk was assessed using HI index. The results indicate that there is a health risk associated with the ingestion of contaminated food-crops (HI > 1)

Tín ngưỡng Then Giáy ở Lào Cai

427 tr. ; 21 cm

Total Cyanide Content in Water-bodies in Some Areas of Tam Lanh Commune, Phu Ninh District, Quang Nam Province

This study is conducted to determine the total cyanide content in surface water and well water samples in some areas surrounding gold mining dumps in Tam Lanh commune, Phu Ninh district, Quang Nam province – one of the gold-wealthy zones where mining activites have been uncontrollablly taking place in recent years. The result indicates that well water here is still not contaminated while surface water shows signs of cyanide pollution in comparison with QCVN 08-MT: 2015/MONRE and QCVN 01:2009/MOH regulations. Particularly, the average cyanide contents in surface water in two sampling periods are 0.159 ± 0.044 mg/l and 0.16 ± 0.043 mg/l respectively; the highest cyanide content in groundwater is found to be 0.06 mg/l, being recorded in G6 sampling site. This study also shows that there is a moderate correlation betwen content of cyanide in well water and the depth of well (r=–0.47, n=20)

Giáo trình luật thương mại Việt Nam

383 tr. ; 21 c