C\u00f3 nh\u1eefng b\u1ee9c ho\u1ea1 c\u1ed5 ho\u1eb7c do th\u1eddi gian \u0111\u00e3 qu\u00e1 l\u00e2u, ho\u1eb7c do b\u1ea3o qu\u1ea3n kh\u00f4ng t\u1ed1t, m\u00e0u s\u1eafc t\u1edd gi\u1ea5y c\u00f3 th\u1ec3 thay \u0111\u1ed5i. Th\u1ebf nh\u01b0ng d\u1ea5u \u1ea5n c\u1ee7a t\u00e1c gi\u1ea3 \u0111\u00f3ng tr\u00ean b\u1ee9c ho\u1ea1 v\u1eabn gi\u1eef nguy\u00ean m\u00e0u \u0111\u1ecf t\u01b0\u01a1i. Cho d\u00f9 v\u1ebft d\u1ea5u \u1ea5n ch\u1ec9 l\u00e0 m\u1edd m\u1edd ho\u1eb7c r\u00f5 th\u00ec ch\u1ea5t l\u01b0\u1ee3ng d\u1ea5u \u1ea5n v\u1eabn r\u1ea5t t\u1ed1t, m\u00e0u \u0111\u1ecf v\u1eabn t\u01b0\u01a1i. Tr\u1ea3i qua m\u1ea5y ch\u1ee5c n\u0103m th\u1eadm ch\u00ed \u0111\u1ebfn m\u1ea5y tr\u0103m n\u0103m, m\u00e0u \u0111\u1ecf v\u1eabn \u0111\u1eb9p, kh\u00f4ng c\u00f3 g\u00ec thay \u0111\u1ed5i.<\/p>\n\n\n\n
V\u1ebft m\u1ef1c d\u1ea5u \u0111\u1ecf t\u1ea1i sao l\u1ea1i kh\u00f4ng h\u1ec1 \u0111\u1ed5i m\u00e0u? M\u00e0u \u0111\u1ecf d\u1ea5u \u1ea5n \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o b\u1eb1ng chu sa (thu\u1ef7 ng\u00e2n sufua), d\u1ea7u th\u1ef1c v\u1eadt v\u00e0 m\u1ed9t \u00edt v\u1eadt li\u1ec7u s\u1ee3i l\u00e0m m\u1ec1m. V\u00e0o th\u1eddi c\u1ed5 x\u01b0a, c\u00e1c danh ho\u1ea1 th\u01b0\u1eddng th\u00edch d\u00f9ng lo\u1ea1i v\u1eadt li\u1ec7u qu\u00fd \u0111\u1ec3 l\u00e0m m\u1ef1c d\u1ea5u, trong \u0111\u00f3 c\u00f3 asen, h\u1ea1t trai, \u0111\u00e1 qu\u00fd, san h\u00f4, m\u00e3 n\u00e3o, mica, v\u00e0ng nghi\u1ec1n th\u00e0nh b\u1ed9t m\u1ecbn, n\u00ean v\u0129nh vi\u1ec5n kh\u00f4ng b\u1ecb nh\u1ea1t m\u00e0u. R\u00f5 r\u00e0ng kh\u00f4ng ph\u1ea3i t\u1ea5t c\u1ea3 c\u00e1c v\u1eadt li\u1ec7u \u0111\u00e3 d\u00f9ng \u0111\u1ec1u l\u00e0 qu\u00fd gi\u00e1 c\u1ea3.<\/p>\n\n\n\n
Chu sa ch\u00ednh l\u00e0 thu\u1ef7 ng\u00e2n sunfua d\u1ea1ng k\u1ebft tinh, l\u00e0 lo\u1ea1i kho\u00e1ng v\u1eadt m\u00e0u \u0111\u1ecf t\u01b0\u01a1i. Trung Qu\u1ed1c l\u00e0 n\u01b0\u1edbc nghi\u00ean c\u1ee9u v\u00e0 s\u1eed d\u1ee5ng chu sa s\u1edbm nh\u1ea5t. T\u1eeb 2500 tr\u01b0\u1edbc \u0111\u00e3 c\u00f3 ng\u01b0\u1eddi ch\u00fa \u00fd s\u1eed d\u1ee5ng chu sa. N\u00e9t v\u1ebd tr\u00ean b\u1ee9c ho\u1ea1 c\u00f3 th\u1ec3 b\u1ecb nh\u1ea1t m\u00e0u do c\u00e1c ph\u00e2n t\u1eed ch\u1ea5t m\u00e0u \u0111\u00e3 t\u00e1c d\u1ee5ng v\u1edbi oxy c\u1ee7a kh\u00f4ng kh\u00ed b\u1ecb oxy ho\u00e1 th\u00e0nh c\u00e1c oxit. Thu\u1ef7 ng\u00e2n sunfua kh\u00f4ng h\u1ec1 ch\u1ecbu t\u00e1c d\u1ee5ng c\u1ee7a kh\u00f4ng kh\u00ed n\u00ean gi\u1eef nguy\u00ean di\u1ec7n m\u1ea1o trong su\u1ed1t th\u1eddi gian d\u00e0i, h\u1ea7u nh\u01b0 v\u0129nh c\u1eedu, n\u00ean m\u00e0u \u0111\u1ecf m\u1ef1c d\u1ea5u kh\u00f4ng h\u1ec1 thay \u0111\u1ed5i theo th\u1eddi gian.<\/p>\n\n\n\n
V\u00ec chu sa ch\u1ee9a thu\u1ef7 ng\u00e2n n\u00ean ng\u01b0\u1eddi ta lo ng\u1ea1i khi s\u1eed d\u1ee5ng. Ng\u00e0y nay \u0111\u1ec3 ch\u1ebf t\u1ea1o m\u1ef1c d\u1ea5u ng\u01b0\u1eddi ta \u0111\u00e3 d\u00f9ng ph\u1ea9m m\u00e0u \u0111\u1ec3 thay chu sa. \u0110\u1ed9 b\u1ec1n c\u1ee7a lo\u1ea1i m\u1ef1c d\u1ea5u n\u00e0y \u0111\u01b0\u01a1ng nhi\u00ean kh\u00f4ng th\u1ec3 b\u1ec1n nh\u01b0 chu sa.<\/p>\n\n\n\n
Chu sa c\u00f2n c\u00f3 t\u00ean l\u00e0 th\u1ea7n sa v\u00ec th\u1eddi x\u01b0a chu sa \u0111\u01b0\u1ee3c khai th\u00e1c t\u1ea1i Th\u1ea7n Ch\u00e2u (thu\u1ed9c d\u00e3y Th\u1ea7n Kh\u00ea, t\u1ec9nh H\u1ed3 Nam).<\/p>\n\n\n\n
T\u1eeb kho\u00e1: Chu sa; M\u1ef1c d\u1ea5u.<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
C\u00f3 nh\u1eefng b\u1ee9c ho\u1ea1 c\u1ed5 ho\u1eb7c do th\u1eddi gian \u0111\u00e3 qu\u00e1 l\u00e2u, ho\u1eb7c do b\u1ea3o qu\u1ea3n kh\u00f4ng t\u1ed1t, m\u00e0u s\u1eafc t\u1edd gi\u1ea5y c\u00f3 th\u1ec3 thay \u0111\u1ed5i. Th\u1ebf nh\u01b0ng d\u1ea5u \u1ea5n c\u1ee7a t\u00e1c gi\u1ea3 \u0111\u00f3ng tr\u00ean b\u1ee9c ho\u1ea1 v\u1eabn gi\u1eef nguy\u00ean m\u00e0u \u0111\u1ecf t\u01b0\u01a1i. Cho d\u00f9 v\u1ebft d\u1ea5u \u1ea5n ch\u1ec9 l\u00e0 m\u1edd m\u1edd ho\u1eb7c r\u00f5 th\u00ec […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[8,15],"tags":[],"class_list":["post-8120","post","type-post","status-publish","format-standard","hentry","category-hoa-hoc","category-hoi-dap-khoa-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/8120","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=8120"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/8120\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=8120"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=8120"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=8120"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}