Abstract: A method for removing a heavy metal from water includes subjecting a microbial solution containing a liquid culture of a urease-producing bacterial strain and a reaction solution containing a manganese compound and urea to a microbial-induced precipitation reaction, so as to obtain biomineralized manganese carbonate (MnCO3) particles, admixing the biomineralized MnCO3 particles with water containing a heavy metal, so that the biomineralized MnCO3 particles adsorb the heavy metal in the water to form a precipitate, and removing the precipitate from the water.

Abstract: An operating method of a communication device includes performing a scan procedure to receive a device name and an address of an external device; determining a connection interval corresponding to the external device according to one or more policies stored in the communication device under a condition that the device name and/or the address match the one or more policies; and building a connection with the external device according to the connection interval and the address of the external device, so that the communication device and the external device communicate corresponding to the connection interval.

Abstract: A connecting method includes broadcasting, through a first transmission component of a first connection device, a device name of the first connection device and an address of the first connection device; transmitting, through a second transmission component of the first connection device, identification information of the first connection device to a second connection device; performing, through the second connection device, a scanning procedure to acquire the device name and the address of the first connection device; and building, through the second connection device, a connection with the first connection device according to the identification information of the first connection device, the device name of the first connection device, and the address of the first connection device.