Crude Coal Tar

Introduction

Coal tar yog ib qho tseem ceeb los ntawm cov khoom lag luam ntawm thee pyrolysis, nrog rau ntau yam ntawm cov organic tebchaw uas lav kev saib xyuas vim lawv cov teebmeem kev noj qab haus huv.

Kev sib xyaw ntawm Crude Coal Tar

Cov muaj pes tsawg leeg sib txawv raws li cov txheej txheem pyrolytic distillation thiab thee muaj pes tsawg leeg. Nws suav nrog cov organic tebchaw xws li benzene, toluene, xylenes, cumenes, coumarone, indene, benzofuran, naphthalene, acenaphthene, methylnaphthalenes, fluorine, phenol, cresols, pyridine, picoline, phenanthracene, carb, carb, thiab phenanthracene.

Distillation thiab By-products

Thaum lub sij hawm distillation, nws yields creosotes, distillates, suab, thiab volatiles. Creosotes thiab distillates yog sib dua thiab tsawg viscous, thaum lub suab yog cov khoom ntom ntom. Volatiles muaj qis molecular hnyav polycyclic aromatic hydrocarbons (PAHs).

Kev txhawj xeeb txog kev noj qab haus huv

Keeb kwm, nws tau txuas nrog mob qog noj ntshav los ntawm kev ua haujlwm raug. Sir Percival Pott cov kev soj ntsuam ntawm qhov chimney sweeps thiab kev tshawb fawb hauv chaw soj nstuam qhia txog nws cov peev xwm carcinogenic.

Table of Contents

Kev nkag siab niaj hnub

Cov kev tshawb fawb tom qab tau lees paub qhov carcinogenicity ntawm nws cov tebchaw, ua rau kev ntsuas kev nyab xeeb thiab kev tswj hwm nruj.

Kev pheej hmoo ntawm kev noj qab haus huv thiab kev raug ua haujlwm

Kev raug ua hauj lwm thiab nws cov derivatives ua rau muaj kev phom sij loj rau kev noj qab haus huv. Cov neeg ua haujlwm hauv kev lag luam xws li thee tar distillation, asphalt kev tsim khoom, thiab kev txuag ntoo yog qhov tshwj xeeb. Kev raug mob ntev tuaj yeem ua rau tawv nqaij khaus, teeb meem ua pa, thiab muaj kev pheej hmoo ntawm qee yam qog nqaij hlav.

Kev tswj hwm kev ntsuas

Vim nws paub tias muaj kev phom sij rau kev noj qab haus huv, cov koom haum tswj hwm thoob ntiaj teb tau ua raws li cov lus qhia nruj thiab cov txheej txheem kev nyab xeeb rau kev tuav thiab pov tseg cov thee tar thiab nws cov txiaj ntsig. Cov kev ntsuas no txhawm rau tiv thaiv cov neeg ua haujlwm, ib puag ncig, thiab kev noj qab haus huv rau pej xeem.

Alternatives thiab Sustainable Practices

Nyob rau hauv xyoo tas los no, muaj kev nthuav dav ntxiv rau kev tshawb nrhiav lwm txoj hauv kev rau cov thee tar hauv ntau qhov kev lag luam. Bio-based cov ntaub ntawv, cov khoom siv hluavtaws, thiab cov kev coj ua kom ruaj khov tau raug tshawb fawb thiab siv los txo kev cia siab rau cov thee tar thiab txo nws qhov cuam tshuam ib puag ncig.

Ib puag ncig cuam tshuam

Sib nrug los ntawm nws txoj kev pheej hmoo ntawm kev noj qab haus huv, nws ua rau muaj kev txhawj xeeb txog ib puag ncig. Kev pov tseg tsis raug ntawm nws pov tseg te tuaj yeem ua rau av thiab dej paug, cuam tshuam rau ecosystems thiab tib neeg kev noj qab haus huv. Kev tswj xyuas cov pov tseg kom ruaj khov thiab kev siv zog kho yog qhov tseem ceeb los txo cov kev cuam tshuam ib puag ncig.

Yav Tom Ntej Outlook

Raws li kev lag luam siv zog rau kev ruaj khov thiab kev nyab xeeb, yav tom ntej ntawm kev siv cov khoom lag luam zoo li yuav pom cov kev hloov pauv tseem ceeb. Kev tsim kho tshiab hauv kev siv thev naus laus zis, ua ke nrog kev tswj hwm kev nce qib thiab kev paub ntau ntxiv, yuav tsim cov kev taw qhia ntawm nws siv thiab nws cuam tshuam rau tib neeg.