A MERCURY-POLLUTED SOIL REMEDIATION EXPERIMENT FOR ENVIRONMENTAL SPECIALIZED COURSES TO ADOPT A HOLISTIC APPROACH TO CONSERVING MOUNTAINS, RIVERS, FORESTS, FARMLANDS, LAKES, GRASSLANDS AND HUMANS.

The overall protection and comprehensive management of one-person life community of mountains, rivers, forests, fields, lakes, and grasses is an important measure to improve the service function of terrestrial ecosystem and ensure the harmonious coexistence between man and nature. This study produced biochar using three agricultural wastes and modified them with graphene to remedy mercurycontaminated soil in soil remediation experiments designed for environmental specialized courses. Results showed that the biochar production yield followed the descending order of rice straw (RSB) > peanut shell (PSB) > corn straw (CSB), while the ash content had a reversed order. The pH values of all the six biochar exceeded 7. The adsorption kinetics and isothermal mercury adsorption curve fitted the pseudo-second order kinetic equation and Langmuir model better, respectively. The adsorption ability of the six followed the descending order of G-PSB> GCSB> PSB>CSB>G-RSB>RSB with the maximum adsorption capacities of 7.64, 8.67, 7.93, 7.49, 6.00, 3.60 g/kg, respectively. The study provides a practicable experiment regarding of mercury-polluted soil remediation for environmental specialized courses. The results well support the idea of "human and natural life community". [ABSTRACT FROM AUTHOR]