Identification of Chrysotile in Local Soil at Beypinari Village (Sivas-Turkey) Regarding Mine and Health Issue

Abstract

Asbestos is dangerous for health and is forbidden to use in Turkey, but villagers who live in rural eastern part still use it especially for their home for insulation purposes and even as a substitute for baby powder. Therefore, geological and chemical properties of this type of soil, which is near the settlement, should be characterized and identified from the point of view of health. Beypinari asbestos deposits are located at Beypinari village, about 90 km southeast of Sivas, Turkey within Central Anatolian Ophiolites. Therefore, in the present study, the existence of chrysotile in Beypinari asbestos deposit were characterized and identified by mineralogical analysis and by major, trace, REE analysis. The results show that the samples contain different amount of calcite mineral, the main mineral being chrysotile.

An innovative approach to the preparation of coloured and multifunctional silk material with the natural extracts from chestnut shell and black rice bran

“…These changes are attributed to the polyphenol and anthocyanin present in the extracts of chestnut shell and black rice bran respectively. The lone‐pair electrons of the phenolic hydroxyls are able to interact with metal ions of unoccupied molecular orbits in the form of coordinate bonds . The coordinated complex differs in colour from the original dyes.…”

“…Moreover, the bond energy of newly formed coordinate bonds is higher than that of ordinary hydrogen bonds formed in compound dyeing, which results in firm combination of dyes with fibres. The scheme of hydrogen bond formation and coordinate bond formation in the process of dyeing is shown in Figure . Furthermore, the coordination of natural extracts with mordant gives rise to an increase in molecular weight, leading to a reduction in the rate of diffusion out of the substrate, which is beneficial to wet‐treatment fastness.…”

“…the K/S value decreased with increasing ratio of chestnut shell extract, which can be explained by the higher exhaustion of black rice bran extract compared with chestnut extract to silk. The lone-pair electrons of the phenolic hydroxyls are able to interact with metal ions of unoccupied molecular orbits in the form of coordinate bonds [38,39]. However, as shown in Figure 6c, the K/S value of dyed silk after mordanting with ferrous sulphate is much higher than that of unmordanted dyed silk, along with the obvious variation in the K/S curves, indicating the significant colour distinction between unmordanted and mordanted dyed silk.…”

“…The scheme of hydrogen bond formation and coordinate bond formation in the process of dyeing is shown in Figure 9 [38]. The enhancement of colour fastness of post-mordanted dyed silk is due to the post-mordant dyeing process, during which the mordants can bridge the natural dyes and silk fibres by producing a new coordinated complex.…”