PX comes from petroleum, and all gasoline contains PX. Its main purpose is to produce PTA (purified terephthalic acid), and most PTA is used to produce polyester, including polyester fiber, film and bottle chip. These products can be seen everywhere in our daily life and have no obvious harm to human health.
"PX is para-xylene. Combustible low toxic compounds. " On April 5th, Baidu Encyclopedia, a search website, fixed its explanation of PX on the scientific description. However, if you open the version history on the right, you will find that the defense of the common-sense scientific assertion that PX is "low toxic" comes from the persistence of Tsinghua students around the clock.
The PX entry was tampered with as "highly toxic"
On the afternoon of April 2nd, Wang Runjia, a sophomore in Tsinghua University Chemical Engineering Department, was surprised to find that Baidu Encyclopedia's explanation of PX was "highly toxic".
It turned out that on March 30th, at 00: 09 am on the day of Maoming's anti-PX demonstration, netizen @ Fantasy Scholar wjc quietly changed the toxicity of PX in Baidu Encyclopedia from "low toxicity" to "highly toxic". The change of the two words became the fuse of the "entrance defense war". Since then, some netizens have made objective corrections to malicious tampering many times, but they have been changed back to "toxic" several times in a row.
According to reports, in six days, "low toxicity" was changed to "highly toxic" 36 times.
"PX is really low in chemical toxicity." Qian Weizhong, an associate professor in the Department of Chemical Engineering in Tsinghua University, explained that in general, the toxicity of PX is similar to that of ethanol.
Tsinghua students show their identity and fight back.
"How can these people ignore scientific common sense?" Wang Runjia decided to use his knowledge to scientifically explain the PX entry, and called on students to publicize PX knowledge in various ways.
Subsequently, Wang Runjia changed his avatar on a social networking site widely used by college students to the chemical formula of paraxylene (PX). I also set up a photo album on Renren.com and uploaded screenshots, calling on students to participate.
Cai Dali, a senior student of Chemical Engineering Department, saw Wang Runjia's photo album, and also participated in the revision of the entry, and wrote in the reason for the revision: "Tsinghua Chemical Engineering Department will defend the entry to the death today". As soon as this statement came out, students of Tsinghua Chemical Engineering Department responded in succession.
"Stick it out with them!" Ray, a junior in the Department of Chemical Engineering, will refresh his entries every hour or two, ready to "accept the challenge" at any time.
It is understood that nearly 10 students in Tsinghua, mainly from the Department of Chemical Engineering of Tsinghua, spontaneously defended the scientific knowledge of low toxicity of PX on well-known websites.
The students of Tsinghua Chemical Engineering Department finally won the entrance defense. The website where the entry is located has locked the PX entry in the description of "low toxic compounds".
The public's understanding of PX is very low.
The entry of PX Baidu Encyclopedia was revised, which also caused a heated discussion on the online forum of Maoming Online. "The main force involved in this malicious tampering is a netizen named' Drowning 3,000'. He repeatedly tampered with it and asked us Tsinghua students not to talk nonsense. Later, the students of our chemical engineering department wrote to him specifically to tell him about science and law. Finally, he stopped tampering. " Wang Runjia said.
Phoenix. Com has done a survey on how to look at the PX project. 1647 people participated in the survey. Among them, 59.3 1% of the respondents don't know what PX is, and 59.89% of the respondents don't know that many items used in our daily life contain PX.
Qian Weizhong believes that scientifically speaking, there is no problem with the safety of developing PX projects. Japan and South Korea are vigorously developing this industry, and Singapore has also built PX projects not far from residential areas.
Some netizens believe that these projects are built abroad because the security is more secure. In this regard, Qian Weizhong expressed his understanding of netizens' concerns, but he thought that the production technology, process and safety protection measures of PX project all had a set of international standards, and there was no phenomenon that China's standards and safety guarantee capacity were lower than those of foreign countries.
20 13 people's daily "verification" column pays attention to the development of PX industry, and finds that the public's sensitivity to PX is mainly worried about the lack of enterprise safety production management and government safety supervision.
According to the People's Daily.
/cskb/cskb/20 14-04/07/content _ 7068569 . htm