Nước mưa bẩn và nguy hiểm hơn chúng ta nghĩ
Bình lọc nước uống gia đình swacf
Từ xa xưa nhiều người Việt đã có thói quen trữ nước mưa để ăn uống sinh hoạt vì nghĩ rằng nó sạch. Tuy nhiên, sự thực thì nước mưa không sạch và an toàn như vẫn lầm tưởng.
Theo các chuyên gia, nước mưa khi rơi xuống nó đã rửa trôi hàng trăm m3 không khí trong bầu khí quyển. Trong quá trình đó, những chất bẩn, hóa chất độc hại, bụi lơ lửng sẽ được kéo theo nước và rơi xuống. Bình lọc nước uống gia đình swacf
Nguy hiểm hơn, trong không khí thường có chứa 2 hợp chất gây ô nhiễm gồm dioxit sunfua (S02) và các ôxit nitơ (NOx), Chất độc này cũng sẽ theo mưa rơi xuống và gây hại cho bạn khi sử dụng nước mưa sinh hoạt. Bình lọc nước uống gia đình swacf
Đôi khi ở Việt Nam cũng xảy ra mưa axit, dù không quá đậm đặc nhưng nếu bạn uống phải thì những chất độc trong nước mưa sẽ thâm nhập vào cơ thể, gây tác hại cho bạn, đặc biệt là hệ hô hấp. Bình lọc nước uống gia đình swacf
Ngoài ra, những tác nhân độc hại của nước mưa còn ảnh hưởng đến đường tiêu hóa, đường ruột nếu dùng nước mưa bị ngấm thuốc sâu, khói bụi công nghiệp. Bình lọc nước uống gia đình swacf
Uống nước mưa thời gian dài còn khiến cho cơ thể bị thiếu khoáng chất, chất dinh dưỡng, gây ra hiện tượng giảm sức đề kháng, hệ thần kinh bị tổn thương vì bản chất nước mưa thiếu sắt, muối, canxi… Bình lọc nước uống gia đình swacf
Tuyệt đối không uống trực tiếp nước mưa vì tính axit trong nước mưa sẽ khiến hệ tiêu hóa của bạn trở nên ốm yếu.
Tính axit trong nước mưa sẽ làm cho da bị dị ứng, mẩn ngứa hay mắc các bệnh như nấm…
Tuy vậy, nếu muốn tận dụng nguồn nước miễn phí từ mẹ thiên nhiên, bạn hoàn toàn có thể dùng nước mưa để ăn uống sau khi lọc và trung hòa axit trong nước mưa.
Cách lấy nước mưa đúng cách:
– Khi hứng nước mưa để ăn uống không nên lấy nước mưa đầu mùa. Bạn hãy đợi mưa được khoảng 15 phút rồi mới lấy thì sẽ giảm bất lượng hóa chất, tạp chất độc hại trong đó.
– Tuyệt đối tránh không hứng nước từ mái Fibro-Xi Măng, mái tôn vì nước sẽ có thêm các chất độc.
– Nên rửa, dọn rêu, rác, bụi từ máng thu, mái nhà,… Chỗ máng dẫn chảy vào ống, có đặt phễu có lưới chắn rác, Lọc qua bể lọc cát trước khi cho vào bể chứa. Đậy kín để tránh muỗi, bọ gậy. Quan sát và lau rửa bể định kỳ. Nếu bạn nấu ăn, nấu nước uống, pha trà bằng nước đó thì yên tâm.
Đức Hòa (tổng hợp)
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