| Study on Migration Characteristics of Phosphorus during NR Processing |
| Received:February 24, 2025 Revised:February 24, 2025 |
| DOI：10.12136/j.issn.1000-890X.2025.06.0410 |
| Key Words: NR；natural latex；serum；dry rubber；phosphorus migration；prevention and control of water pollution |
| Author Name | Affiliation | E-mail | | CUI Xinghua | 1.Yunnan Key Laboratory of Sustainable Utilization Research on Rubber Tree；2.Yunnan Institute of Tropical Crops | cuixh819@126.com | | QI Long | 1.Yunnan Key Laboratory of Sustainable Utilization Research on Rubber Tree；2.Yunnan Institute of Tropical Crops | | | JIANG Shikuan | 1.Yunnan Key Laboratory of Sustainable Utilization Research on Rubber Tree；2.Yunnan Institute of Tropical Crops | | | YAN Li | 1.Yunnan Key Laboratory of Sustainable Utilization Research on Rubber Tree；2.Yunnan Institute of Tropical Crops | | | XU Rong | 1.Yunnan Key Laboratory of Sustainable Utilization Research on Rubber Tree；2.Yunnan Institute of Tropical Crops | | | ZHANG Guimei* | 1.Yunnan Key Laboratory of Sustainable Utilization Research on Rubber Tree；2.Yunnan Institute of Tropical Crops | zgm1027@163.com |
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| Abstract: |
| Using natural latex as raw material，this study analyzed the migration rules of the phosphorus during natural rubber（NR） processing by investigating the effects of process conditions such as dry rubber content，ammonia content，latex coagulation pH value and coagulum storage time on the phosphorus migration into serum and dry rubber.The results showed that，during NR processing，most of the phosphorus element migrated into the serum，while a small portion remained in the dry rubber.When the latex coagulation pH value was adjusted from 4.5 to 4.7，the phosphorus migration rate in serum reached the highest，and then with the increase of latex coagulation pH value，the phosphorus migration rate in serum gradually decreased.The phosphorus migration rate in dry rubber was the highest at latex coagulation pH value of 4.8，and it was lower at other latex coagulation pH values.The influence of the ammonia content on the phosphorus migration rate in dry rubber was significant and positively correlated.After 10 d of coagulum storage，the coagulum storage time was negatively correlated with the total phosphorus and available phosphorus contents in serum.Through comprehensive analysis of NR processing conditions，the phosphorus migration rate in serum could be minimized to the greatest extent possible by adding a small amount of ammonia，raising dry rubber content and increasing coagulation pH value.This provided effective support for NR processing factories to improve process conditions and reduce phosphorus content in wastewater. |
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