CAN THO CITY DEPARTMENT OF SCIENCE AND TECHNOLOGY
Bề mặt đường phố góp phần gây ô nhiễm không khí
Trong nghiên cứu đăng trên tạp chí Science Advances vào tháng 9/2020, các nhà khoa học tại Đại học Yale (Mỹ) phát hiện nhựa đường giải phóng nhiều hợp chất hóa học gây ô nhiễm không khí trong điều kiện nắng nóng, bao gồm chủ yếu là các chất ô nhiễm dạng sol khí hữu cơ thứ cấp (SOA).

Ảnh: Dailynewsegypt.

Trong phòng thí nghiệm, nhóm nghiên cứu cho các mẫu nhựa đường tiếp xúc với phạm vi nhiệt độ từ 40 – 200°C, đồng thời theo dõi lượng khí thải thoát ra từ nhựa đường. Họ phát hiện lượng phát thải SOA tăng gấp đôi khi nhiệt độ ban đầu tăng lên từ 40°C đến 60°C. SOA tiếp tục tăng lên khoảng 70% sau mỗi lần tăng 20°C trong phạm vi nhiệt độ 60 – 200°C.

“Nhiệt độ trong các thành phố ngày càng nóng lên do biến đổi khí hậu và hiệu ứng nghịch nhiệt đô thị làm tăng mức độ ảnh hưởng của nhựa đường đối với chất lượng không khí đô thị theo thời gian”, Drew Gentner, trưởng nhóm nghiên cứu, cho biết.

Trước đây, SOA thường không được báo cáo khi đề cập đến các chất ô nhiễm ở khu vực đô thị. Vì vậy, Gentner khuyến cáo rằng chúng ta nên đưa thành phần này vào các tính toán trong tương lai về chất lượng không khí mà chúng ta đang thở.

Quốc Hùng

www.khoahocphattrien.vn (ctngoc)
Most viewed news

Apple Plans to Transform Siri into a Chatbot

Apple is reportedly preparing a major upgrade for iOS 27 and macOS 27, with a strong focus on AI-powered photo editing and a redesigned Siri that behaves more like a chatbot than ever before.

YouTube Tests New AI-Powered Q&A Search Mode

YouTube is experimenting with a new AI-driven search experience designed for users who often turn to the platform for recipes, travel planning, or step-by-step tutorials. Instead of simply returning a list of videos, the new tool allows users to ask direct questions and receive structured, step-by-step answers that blend text, short clips, and full-length videos.

Russian Engineers Double CNC Processing Speed with Breakthrough Machine Design

In a major leap for modern manufacturing, researchers at Izhevsk State Technical University (IzhGTU) named after M.T. Kalashnikov have developed a new method for operating CNC machining centers that doubles productivity without requiring expensive hardware upgrades.

Xiaomi’s Next-Gen XRING O3 Chip Leak Points to Foldable Phone Debut

Xiaomi is reportedly preparing to launch its self-developed XRING O3 processor, with leaks suggesting it will debut inside the upcoming Xiaomi 17 Fold. The new chip appears in Mi Code under the codename “lhasa”, hinting at a design optimized for multitasking on foldable devices.

Resolutely promoting digital transformation, developing science and technology, and reforming administrative procedures

The Government Office issued Notice No. 167/TB-VPCP concluding the second meeting in 2026 of the Government’s Steering Committee for the development of science, technology, innovation, digital transformation, and Project 06.

Scientific and technological autonomy: From accumulated foundations to value creation

Strategic autonomy in science and technology is no longer a distant goal but has become an urgent requirement as the accumulated foundation is now sufficient and the time for action has matured. With distinctive advantages such as rare earth resources, tropical forest ecosystems, abundant fisheries, and an important geostrategic position, Vietnam has a solid basis to develop and master technologies from its internal capacity, thereby creating differentiated and sustainable competitive advantages.

Nurturing high-quality technology human resources from P-Innovation 2026

On April 3, the Posts and Telecommunications Institute of Technology held the Final Round of the P-Innovation 2026 competition, aiming to promote the development of an innovation ecosystem within the university environment, associated with training high-quality human resources and developing technology products.

Guidelines for the dedicated data transmission network serving Party and State agencies

The Minister of Science and Technology has issued Circular No. 06/2026/TT-BKHCN stipulating details and providing guidance on several provisions of Decision No. 33/2025/QĐ-TTg dated 15 September 2025 of the Prime Minister on the Dedicated Data Transmission Network serving Party and State agencies.

The development of science, technology, and innovation becomes the main driver of economic growth.

Deputy Prime Minister Nguyen Chi Dung signed Decision No. 604/QD-TTg dated 02/4/2026 approving the adjustment and supplementation of the Strategy for the development of science, technology, and innovation to 2030 (the Strategy).

Related news
CAN THO CITY DEPARTMENT OF SCIENCE AND TECHNOLOGY

Copyright @ 2021 belongs to the Can Tho City Department of Science and Technology
Address: No. 02, Ly Thuong Kiet, Ninh Kieu Ward, Can Tho City
Phone: 0292.3820674, Fax: 0292.3821471; Email: sokhcn@cantho.gov.vn
Head of the Editorial Board: Mr. Tran Dong Phuong An - Deputy Director of the
Can Tho City Department of Science and Technology

Copyright © 2021 All rights reserved | This template is made by CASTI'1987