Table 1 Records for the environmental monitoring and restoration terms, filtered by publication period (2010 to 2019), listed according to the frequency of occurrence
Frequency of key words | Burst of key words | |||||||
|---|---|---|---|---|---|---|---|---|
Rank of frequency | Key words | No. of frequency | Time sequence | Key words | Burst intensity | Start | End | 2010–2019 |
1 | Heavy metals | 324 | 1 | Risk factor | 3.15 | 2016 | 2019 |
|
2 | Drinking water | 304 | 2 | Health risk | 16.09 | 2016 | 2019 |
|
3 | Pollution | 283 | 3 | PCBs | 2.88 | 2016 | 2017 |
|
4 | Exposure | 275 | 4 | Land use | 11.00 | 2016 | 2017 |
|
5 | Soil | 239 | 5 | Constructed wetland | 10.41 | 2015 | 2016 |
|
6 | Nitrogen | 214 | 6 | Adsorption | 7.50 | 2015 | 2016 |
|
7 | Underground water | 203 | 7 | River | 7.46 | 2014 | 2015 |
|
8 | Air pollution | 189 | 8 | Wastewater | 5.40 | 2014 | 2015 |
|
9 | Particulate matter | 188 | 9 | Form | 7.58 | 2014 | 2015 |
|
10 | Water | 180 | 10 | PAHs | 6.97 | 2012 | 2014 |
|
11 | Health | 165 | 11 | PM2.5 | 11.98 | 2012 | 2013 |
|
12 | Discharge | 154 | 12 | PCBs | 10.05 | 2011 | 2012 |
|
13 | Arsenic | 150 | 13 | OCPs | 3.50 | 2011 | 2012 |
|
14 | Children | 150 | 14 | Particulate matter | 9.43 | 2010 | 2012 |
|
15 | Microelement | 147 | 15 | Air | 9.35 | 2010 | 2011 |
|
16 | PCBs | 145 | 16 | Rural area | 4.57 | 2010 | 2011 |
|
17 | Pesticides | 143 | 17 | Population | 2.42 | 2010 | 2011 |
|
