Developing(Mn+Zn)-LS Chelated Micronutrient Fertilizer and Its Effect on Corn Growth

LIN Hui-dong1,TANG Yan2,WEN Zhong-dong1,WANG De-han3(1.Green Spring Environmental Protection Technology Co.,Ltd.,Huizhou 516001,China;2.Huizhou Environmental Protection Bureau,Huizhou 516000,China;3.South China Agricultural University,Guangzhou 510642,China)

spent alkaline zinc manganese battery;(Mn+Zn)-LS trace fertilizer;corn

Batteries pollution and treatment was the focus of the present social environmental issues.From the perspective of agricultural chemistry,the elements in waste Zn-Mn batteries,such as Zn,Cu,Fe,Mn,K,except for Hg,were all crops essential nutrients,especially K,which was the main nutrient elements.In view of this,converting the battery into fertilizer and applying it in the agricultural production was a kind of effective method of comprehensive utilization,and didn't need to separate and purify the trace elements in the batteries,which could save a lot of process.Targeting on alkali manganese battery,which was the fastest developing and most consumed battery currently,according to solid waste treatment of "three principles",considering the roasting technology and crop demand for Zn,Mn,etc,following the "treat waste by waste" thought,using the papermaking industry by-products-lignosulphonate as chelating agent,this research poses a technical solution turning the daily scrap into agricultural resource:"batteries free-pollution disposal and chelating micronutrient fertilizers preparation" the life of agricultural waste recycling technology solutions.The result showed that,the spectrum of micronutrient fertilizer changed in peak shape,peak position and strength.The new group(-SO3H,-SO-O-) introduced on lignin structural unit complexing with metal ions,causing the change of aromatic ring absorption peak.And the complex was related with the aromatic ring.The pot experiment results showed that chelating(Mn+Zn)-LS micronutrient fertilizer had a good effect and obviously increased the production.It had certain disease resistance and lodging resistance,and had advantages such as wide scope of dosage,wide application scope and easy to control.In this experiment,the dosage of Mn was 2 mg·kg-1 soil for the best.The fresh and dry weight separately increased 46.3% and 28.5%.Also after potted planting,the pH and Zn,Mn content in soil were improved,providing sufficient fertility in later stage.In the alkaline soil lack of Zn,like calcareous soil,and latosolic red soil lack of Mn,(Mn+Zn)-LS had wide application prospects.